阅读说明：本技术 岩屑冲击压缩工具 (Rock debris impact compression tool ) 是由 胡志坚 张全立 王宏伟 韩飞 肖建秋 邵强 王爱国 梁国红 王军 刘继亮 刘志同 于 2020-06-01 设计创作，主要内容包括：本发明提供了一种岩屑冲击压缩工具,岩屑冲击压缩工具用于将岩屑压实,岩屑冲击压缩工具包括：第一驱动部,第一驱动部用于提供压缩岩屑的静压力；第二驱动部,第二驱动部与第一驱动部的驱动端驱动连接,以使第一驱动部的静压力作用于第二驱动部上；其中,第二驱动部包括压紧部和冲击部,压紧部的压紧端用于对岩屑进行挤压,冲击部与压紧部驱动连接,以通过冲击部向压紧部提供冲击力。通过本发明提供的技术方案,能够解决现有技术中的井下岩屑压缩效率较低的技术问题。(The invention provides a rock debris impact compression tool, which is used for compacting rock debris and comprises: the first driving part is used for providing static pressure for compressing the rock debris; the second driving part is in driving connection with the driving end of the first driving part so that static pressure of the first driving part acts on the second driving part; wherein, the second drive division compresses tightly portion and impact portion including, compresses tightly the end of portion and is used for extrudeing the detritus, and impact portion and the drive of portion of compressing tightly are connected to provide the impact force through impact portion to compressing tightly the portion. By the technical scheme provided by the invention, the technical problem of low underground rock debris compression efficiency in the prior art can be solved.)

1. A rock chip impact compression tool for compacting rock chips, the tool comprising:

a first driving part (10), the first driving part (10) being used for providing static pressure for compressing the rock debris;

the second driving part (20), the second driving part (20) is in driving connection with the driving end of the first driving part (10), so that static pressure of the first driving part (10) acts on the second driving part (20);

the second driving part (20) comprises a pressing part (21) and an impact part (22), the pressing end of the pressing part (21) is used for extruding rock debris, and the impact part (22) is in driving connection with the pressing part (21) so as to provide impact force to the pressing part (21) through the impact part (22).

2. The rock debris impact compression tool according to claim 1, wherein the first drive portion (10) is a first hydraulic drive structure and the second drive portion (20) is a second hydraulic drive structure, an oil passage of the first hydraulic drive structure being in communication with an oil passage of the second hydraulic drive structure; the first hydraulic driving structure is provided with a first rock debris passage (11), the second hydraulic driving structure is provided with a second rock debris passage (23), and the first rock debris passage (11) is communicated with the second rock debris passage (23).

3. The rock debris percussion compression tool of claim 2, wherein the second hydraulic drive arrangement comprises:

the core shaft (24) is in driving connection with the driving end of the first hydraulic driving structure, an oil way of the second hydraulic driving structure is arranged on the core shaft (24), and the oil way of the second hydraulic driving structure and the second rock debris passage (23) are arranged at intervals.

4. Rock fragment impact compression tool according to claim 3, characterized in that the compacting section (21) comprises:

the front cylinder barrel (211) is sleeved on the mandrel (24), the mandrel (24) is provided with a first shoulder (241), the inner wall of the front cylinder barrel (211) is provided with a second shoulder (2111), and the first shoulder (241) abuts against the second shoulder (2111);

annular piston (212), movably the cover establish on dabber (24), annular piston (212) are located preceding cylinder (211) with between dabber (24), annular piston (212) are close to the terminal surface of first circular bead (241) with dabber (24) with preceding cylinder (211) enclose into first annular seal chamber (31), be provided with first oil circuit passageway (41) on dabber (24), first oil circuit passageway (41) with first annular seal chamber (31) intercommunication.

5. A rock fragment impact compression tool according to claim 4, characterized in that the compacting section (21) further comprises:

the front end cover (213) is arranged at the end part of the front cylinder barrel (211), the end face, close to the front end cover (213), of the annular piston (212) and the front end cover (213) and the front cylinder barrel (211) enclose a second annular sealing cavity (32), a second oil passage (42) is arranged on the mandrel (24), and the second oil passage (42) is communicated with the second annular sealing cavity (32).

6. A rock fragment impact compression tool according to claim 5, characterized in that the compacting section (21) further comprises:

the front end cover (213) is provided with a communication hole (2131), the communication hole (2131) is communicated with the second debris passage (23), the plug rod (214) is inserted into the communication hole (2131), one end of the plug rod (214) is connected with the annular piston (212), and the other end of the plug rod (214) forms a pressing end of the pressing part (21); the plug rod (214) is used for plugging the communication hole (2131) so that the end surface of the front end cover (213) and the pressing end of the plug rod (214) form a pressing end surface.

7. The rock debris impact compression tool according to claim 4, wherein the second hydraulic drive structure further comprises an intermediate joint (25), the intermediate joint (25) is sleeved on the mandrel (24), and the front cylinder (211) is connected with the outer side wall of the intermediate joint (25); the impact portion (22) includes:

the impact piece is movably sleeved on the mandrel (24) and is used for impacting the middle joint (25);

a reversing structure (222), at least a portion of the reversing structure (222) being connected to the impact member to control a direction of movement of the impact member via the reversing structure (222).

8. A rock debris impact compression tool according to claim 7, wherein the impact member is an annular punch (221), the mandrel (24) has a third shoulder (242) thereon, the annular punch (221) has a fourth shoulder (2211) thereon, the third shoulder (242) and the fourth shoulder (2211) are arranged to enclose a third annular sealing cavity (33), the mandrel (24) is provided with a third oil passage (43), and the third oil passage (43) is communicated with the third annular sealing cavity (33).

9. The rock debris impact compression tool according to claim 8, wherein an oil drain (243) is provided on the mandrel (24), the oil drain (243) being in communication with the third oil passage (43); the commutation structure (222) comprises:

the sliding sleeve (2221), the sliding sleeve (2221) is connected with the annular punch hammer (221), an oil drainage groove (22211) is formed in the sliding sleeve (2221), the sliding sleeve (2221) is movably sleeved on the mandrel (24), and the sliding sleeve (2221) is provided with an oil supply position and an oil drainage position; when the sliding sleeve (2221) is in the oil supply position, the oil drainage groove (22211) avoids the oil drainage port (243); when the sliding sleeve (2221) is in the oil drainage position, the oil drainage groove (22211) is communicated with the oil drainage port (243).

10. The rock debris impact compression tool of claim 9, wherein the diverter structure (222) further comprises:

the reversing block (2222) is arranged at one end, far away from the middle joint (25), of the annular impact hammer (221), a reversing groove (22212) matched with the reversing block (2222) is formed in the sliding sleeve (2221), the reversing block (2222) is movably arranged in the reversing groove (22212), and the annular impact hammer (221) drives the sliding sleeve (2221) to move to the oil supply position or the oil drainage position through the reversing block (2222).

11. The rock debris impact compression tool of claim 9, wherein the diverter structure (222) further comprises:

the reset part (2223) is sleeved on the mandrel (24), and the reset end of the reset part (2223) is connected with the annular punch hammer (221).

12. The rock debris impact compression tool according to claim 9, wherein the sliding sleeve (2221) is further provided with a limit groove (22213), and the reversing structure (222) further comprises:

the limiting pin (2224) is arranged on the mandrel (24), and the limiting pin (2224) is positioned in the limiting groove (22213) so as to limit the position of the limiting groove (22213) through the limiting pin (2224).

13. Rock fragment impact compression tool according to claim 9, characterized in that the impact portion (22) further comprises:

a rear cylinder barrel (223) sleeved on the mandrel (24), the annular punch hammer (221) is positioned between the rear cylinder barrel (223) and the mandrel (24),

the rear end cover (224) is arranged at the end part of the rear cylinder barrel (223), a fourth annular sealing cavity (34) is formed between the rear end cover (224) and the mandrel (24), the oil drain port (243) is located in the fourth annular sealing cavity (34), a fourth oil path channel (44) is further arranged on the mandrel (24), and the fourth oil path channel (44) is communicated with the fourth annular sealing cavity (34).

14. The rock debris percussion compression tool of claim 3, wherein the first hydraulic drive arrangement comprises:

a cylinder assembly (12);

the piston assembly (13) is movably arranged in the cylinder assembly (12), and a rod body (131) of the piston assembly (13) is in driving connection with the mandrel (24).

Technical Field

The invention relates to the technical field of drilling equipment in the petroleum industry, in particular to a rock debris impact compression tool.

Background

At present, in the technical field of drilling without drilling machines, a drilling machine is generally adopted to carry a detection instrument to drill underground, acquire geological information and transmit the geological information back to the ground, so that the safety, cluster drilling and long-term monitoring of oil and gas resources are realized, and a new technical means can be provided for solving the technical problem of drilling in complex areas such as oceans, polar regions and the like. Meanwhile, the risk of personnel and equipment can be effectively reduced, and the drilling cost can be controlled. In the technical field of drilling, rock debris compression is an important core function of a driller without a drilling machine, and the rock debris compression has the function of pushing drill cuttings to the tail end of the driller to compact the rock debris so as to seal a shaft and realize self-burying drilling.

However, at present, the hydraulic cylinder driving head is generally adopted to compress the rock debris, but because the static pressure load which can be provided by the drilling rig is limited, the rock debris is difficult to compact, so that the rock debris compression efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a rock debris impact compression tool to solve the technical problem that the underground rock debris compression efficiency in the prior art is low.

In order to achieve the above object, the present invention provides a rock chip impact compression tool for compacting rock chips, the rock chip impact compression tool including: the first driving part is used for providing static pressure for compressing the rock debris; the second driving part is in driving connection with the driving end of the first driving part so that static pressure of the first driving part acts on the second driving part; wherein, the second drive division compresses tightly portion and impact portion including, compresses tightly the end of portion and is used for extrudeing the detritus, and impact portion and the drive of portion of compressing tightly are connected to provide the impact force through impact portion to compressing tightly the portion.

Furthermore, the first driving part is of a first hydraulic driving structure, the second driving part is of a second hydraulic driving structure, and an oil way of the first hydraulic driving structure is communicated with an oil way of the second hydraulic driving structure; the first hydraulic driving structure is provided with a first rock debris passage, the second hydraulic driving structure is provided with a second rock debris passage, and the first rock debris passage is communicated with the second rock debris passage.

Further, the second hydraulic drive structure includes: the mandrel is in driving connection with the driving end of the first hydraulic driving structure, the oil way of the second hydraulic driving structure is arranged on the mandrel, and the oil way of the second hydraulic driving structure and the second rock debris channel are arranged at intervals.

Further, the pressing portion includes: the front cylinder barrel is sleeved on the mandrel, the mandrel is provided with a first shoulder, the inner wall of the front cylinder barrel is provided with a second shoulder, and the first shoulder abuts against the second shoulder; annular piston, movably the cover is established at the dabber, and annular piston is located between preceding cylinder and the dabber, and the terminal surface that annular piston is close to first circular bead encloses into first annular seal chamber with dabber and preceding cylinder, is provided with first oil circuit passageway on the dabber, first oil circuit passageway and first annular seal chamber intercommunication.

Further, the pressing portion further includes: the front end cover is arranged at the end part of the front cylinder barrel, a second annular sealing cavity is formed by the end face, close to the front end cover, of the annular piston, the front end cover and the front cylinder barrel in a surrounding mode, a second oil path channel is arranged on the mandrel, and the second oil path channel is communicated with the second annular sealing cavity.

Further, the pressing portion further includes: the front end cover of the plug rod is provided with a communication hole which is communicated with the second rock debris channel, the plug rod is inserted into the communication hole, one end of the plug rod is connected with the annular piston, and the other end of the plug rod forms a pressing end of the pressing part; the plug rod is used for plugging the communication hole so that the end surface of the front end cover and the pressing end of the plug rod form a pressing end surface.

Furthermore, the second hydraulic driving structure also comprises an intermediate joint, the intermediate joint is sleeved on the mandrel, and the front cylinder barrel is connected with the outer side wall of the intermediate joint; the impact portion includes: the impact piece is movably sleeved on the mandrel and is used for impacting the middle joint; and at least part of the reversing structure is connected with the impact piece so as to control the movement direction of the impact piece through the reversing structure.

Furthermore, the impact piece is an annular punch hammer, a third shoulder is arranged on the mandrel, a fourth shoulder is arranged on the annular punch hammer, the third shoulder and the fourth shoulder are used for enclosing a third annular sealing cavity, a third oil path channel is arranged on the mandrel, and the third oil path channel is communicated with the third annular sealing cavity.

Furthermore, an oil drain port is formed in the mandrel and communicated with the third oil path channel; the reversing structure comprises: the sliding sleeve is connected with the annular punch hammer, an oil drainage groove is formed in the sliding sleeve, the sliding sleeve is movably sleeved on the mandrel, and the sliding sleeve is provided with an oil supply position and an oil drainage position; when the sliding sleeve is in the oil supply position, the oil drainage groove avoids the oil drainage port; when the sliding sleeve is in the draining position, the draining groove is communicated with the draining port.

Further, the reversing structure further comprises: the reversing block is arranged at one end, far away from the intermediate joint, of the annular impact hammer, a reversing groove matched with the reversing block is formed in the sliding sleeve, the reversing block is movably arranged in the reversing groove, and the annular impact hammer drives the sliding sleeve to move to an oil supply position or an oil drainage position through the reversing block.

Further, the reversing structure further comprises: the reset piece is sleeved on the mandrel, and the reset end of the reset piece is connected with the annular punch hammer.

Further, still be provided with the spacing groove on the sliding sleeve, the switching-over structure still includes: and the limiting pin is arranged on the mandrel and is positioned in the limiting groove so as to limit the position of the limiting groove through the limiting pin.

Further, the impact portion further includes: the rear cylinder barrel is sleeved on the mandrel, the annular punch hammer is located between the rear cylinder barrel and the mandrel, the rear end cover is arranged at the end of the rear cylinder barrel, a fourth annular sealing cavity is formed between the rear end cover and the mandrel, the oil drainage port is located in the fourth annular sealing cavity, a fourth oil path channel is further arranged on the mandrel, and the fourth oil path channel is communicated with the fourth annular sealing cavity.

Further, the first hydraulic drive structure includes: a cylinder block assembly; and the piston assembly is movably arranged in the cylinder body assembly, and a rod body of the piston assembly is in driving connection with the mandrel.

By applying the technical scheme of the invention, when the rock debris is compressed by using the rock debris impact compression tool, the first driving part provides static pressure to the second driving part to act on the rock debris, the impact part of the second driving part impacts the compression part to provide impact force to the compression part, and the rock debris can be compacted under lower static pressure load and in shorter time by combining the static pressure and the impact, so that the compression efficiency of the rock debris is obviously improved. Therefore, the technical problem of low underground rock debris compression efficiency in the prior art can be solved through the technical scheme provided by the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of a rock fragment impact compression tool according to an embodiment of the invention; and

figure 2 shows a cross-sectional view of a rock fragment impact compression tool according to an embodiment of the invention.

Wherein the figures include the following reference numerals:

10. a first driving section; 11. a first debris passage; 12. a cylinder block assembly; 13. a piston assembly; 131. a rod body; 20. a second driving section; 21. a pressing part; 211. a front cylinder barrel; 2111. a second shoulder; 212. an annular piston; 213. a front end cover; 2131. a communicating hole; 214. a stopper rod; 22. an impact section; 221. an annular punch hammer; 2211. a fourth shoulder; 222. a commutation structure; 2221. a sliding sleeve; 22211. an oil drainage groove; 22212. a reversing slot; 22213. a limiting groove; 2222. a commutation block; 2223. a reset member; 2224. a spacing pin; 223. a rear cylinder barrel; 224. a rear end cap; 23. a second debris passage; 24. a mandrel; 241. a first shoulder; 242. a third shoulder; 243. an oil drainage port; 244. a front axle body; 245. a rear axle body; 25. an intermediate joint; 31. a first annular seal cavity; 32. a second annular seal chamber; 33. a third annular seal cavity; 34. a fourth annular seal cavity; 41. a first oil passage; 42. a second oil passage; 43. a third oil passage; 44. a fourth oil passage; 50. a connecting sleeve.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, an embodiment of the present invention provides a rock chip impact compression tool for compacting rock chips. The rock fragment impact compression tool includes a first driving part 10 (the first driving part 10 may also be referred to as a ram cylinder) and a second driving part 20 (the second driving part 20 may also be referred to as a press cylinder), the first driving part 10 for providing a static pressure compressing the rock fragment. The second driving portion 20 is drivingly connected to the driving end of the first driving portion 10, so that the static pressure of the first driving portion 10 acts on the second driving portion 20. The second driving part 20 includes a pressing part 21 and an impact part 22, a pressing end of the pressing part 21 is used for abutting against the rock debris, and specifically, the pressing end of the pressing part 21 is used for extruding or pushing the rock debris. The impact part 22 is drivingly connected to the compacting part 21 to provide impact force to the compacting part 21 through the impact part 22, such that the rock fragments are compacted by the combined action of the static pressure of the first driving part 10 and the impact of the second driving part 20.

By adopting the rock debris impact compression tool provided by the embodiment, the static pressure provided by the first driving part 10 to the second driving part 20 acts on rock debris, the impact part 22 of the second driving part 20 impacts the pressing part 21 to provide impact force to the pressing part 21, and the rock debris can be compacted under lower static pressure load and in shorter time in a mode of combining static pressure and impact, so that the compression efficiency of the rock debris is obviously improved. Therefore, through the rock debris impact compression tool that this embodiment provided, can solve the lower technical problem of rock debris compression efficiency in the pit among the prior art.

Specifically, in the present embodiment, the first driving portion 10 is a first hydraulic driving structure, the second driving portion 20 is a second hydraulic driving structure, and an oil path of the first hydraulic driving structure is communicated with an oil path of the second hydraulic driving structure to provide driving force to the second hydraulic driving structure through the first hydraulic driving structure. The first hydraulic drive structure has a first rock debris passage 11, the second hydraulic drive structure has a second rock debris passage 23, and the first rock debris passage 11 is communicated with the second rock debris passage 23. By adopting the hydraulic driving structure, stable driving force can be provided so as to ensure the reliability and stability of compression. Both the first and second debris passages 11, 23 are used for conveying debris.

In the present embodiment, the second hydraulic drive structure includes a mandrel 24, and the mandrel 24 is in driving connection with the driving end of the first hydraulic drive structure, so that the static pressure of the first hydraulic drive structure acts on the mandrel 24. The oil circuit of second hydraulic drive structure sets up on dabber 24, and the oil circuit of second hydraulic drive structure sets up with second detritus passageway 23 interval to make the oil circuit of second hydraulic drive structure and second detritus passageway 23 mutually not influence.

Specifically, the pressing portion 21 in this embodiment includes a front cylinder 211 and an annular piston 212, the front cylinder 211 is sleeved on the core shaft 24, the core shaft 24 has a first shoulder 241, an inner wall of the front cylinder 211 has a second shoulder 2111, and the first shoulder 241 abuts against the second shoulder 2111. Specifically, the first shoulder 241 is pressed against the second shoulder 2111 of the inner wall of the front cylinder 211 by the intermediate joint 25 at the rear end of the front cylinder 211. The annular piston 212 is movably sleeved on the mandrel 24, the annular piston 212 is located between the front cylinder barrel 211 and the mandrel 24, the end face, close to the first shoulder 241, of the annular piston 212 and the mandrel 24 and the front cylinder barrel 211 enclose a first annular sealing cavity 31, the mandrel 24 is provided with a first oil path channel 41, and the first oil path channel 41 is communicated with the first annular sealing cavity 31 so as to push the annular piston 212 to move towards the direction close to the pressing end under the action of oil pressure in the first oil path channel 41. With this arrangement, it is possible to facilitate the stable driving of the annular piston 212 for the movement of pressing the rock debris so that the annular piston 212 stably provides the pressing force to the rock debris.

In this embodiment, the pressing portion 21 further includes a front end cover 213, the front end cover 213 is disposed at an end of the front cylinder 211, an end surface of the annular piston 212 close to the front end cover 213, the front end cover 213 and the front cylinder 211 define a second annular sealing cavity 32, the mandrel 24 is provided with a second oil passage 42, and the second oil passage 42 is communicated with the second annular sealing cavity 32 to push the annular piston 212 to move in a direction away from the pressing end under the action of oil pressure of the second oil passage 42. With such a structural arrangement, it is possible to facilitate stable driving of the annular piston 212 away from the debris after completion of the compaction work. Specifically, the front shaft body 244 of the mandrel 24 is inserted into the inner cavity of the front end cover 213 after passing through the central hole of the annular piston 212, and the first debris passage 11 is communicated with the front end cover 213.

Specifically, the pressing portion 21 in this embodiment further includes a plug 214, the front end cap 213 is provided with a communication hole 2131, and the communication hole 2131 is arranged to communicate with the second rock debris passage 23, so that the rock debris in the second rock debris passage 23 can enter the communication hole 2131. A plug rod 214 is inserted into the communication hole 2131, one end of the plug rod 214 is connected to the annular piston 212, and the other end of the plug rod 214 forms a pressing end of the pressing portion 21. In operation, the annular piston 212 will move the plug 214 and push out and compact the debris in the communication hole 2131 through the plug 214. Specifically, in the present embodiment, the number of the communication holes 2131 is plural, the plural communication holes 2131 are annularly and alternately arranged on the front end cover 213, the number of the plug rods 214 is also plural, the plural plug rods 214 are arranged in one-to-one correspondence with the plural communication holes 2131, and each plug rod 214 is inserted into the corresponding communication hole 2131, so that the rock debris is better compacted by the plural plug rods 214, and the compacting effect is improved.

Specifically, the annular piston 212 and the plug rod 214 are pushed to extend by oil pressure, so that the plug rod 214 is used for blocking the communication hole 2131, so that the end surface of the front end cover 213 and the pressing end of the plug rod 214 form a pressing end surface, and rock debris can be better compacted by the complete pressing end surface. The annular piston 212 and the plug rod 214 are also pushed to retract by the oil pressure to communicate the communication hole 2131 with the second debris passage 23, so that the debris can enter the communication hole 2131.

In this embodiment, the second hydraulic driving structure further includes an intermediate joint 25, the intermediate joint 25 is sleeved on the mandrel 24, and the front cylinder 211 is connected to an outer side wall of the intermediate joint 25. The impact portion 22 includes an impact member and a reversing structure 222, the impact member is movably sleeved on the mandrel 24, and the impact member is used for impacting the middle joint 25 and transmitting impact force to the front cylinder 211 through the middle joint 25. At least a portion of the reversing structure 222 is coupled to the impact member such that movement of the impact member causes the reversing structure 222 to move. The reversing structure 222 is used to control the direction of movement of the impact member such that the reversing structure 222 controls the movement of the impact member toward the intermediate joint 25 or away from the intermediate joint 25.

Specifically, the striking member in this embodiment is the annular punch 221, the mandrel 24 has the third shoulder 242 thereon, the annular punch 221 has the fourth shoulder 2211 thereon, specifically, the front end of the annular punch 221 is sleeved on the third shoulder 242 of the mandrel 24, and the front end of the annular punch 221 can contact the intermediate joint 25. The fourth shoulder 2211 of the annular ram 221 fits over the rear shaft body 245 of the mandrel 24. The third shoulder 242 and the fourth shoulder 2211 are used for enclosing a third annular sealing cavity 33, a third oil path channel 43 is arranged on the mandrel 24, and the third oil path channel 43 is communicated with the third annular sealing cavity 33. With such a configuration, oil is supplied into the third annular seal cavity 33 through the third oil passage 43, and the annular punch 221 can be pushed to move in a direction away from the intermediate joint 25 by the hydraulic pushing action.

In the present embodiment, a drain port 243 is provided in the mandrel 24, and the drain port 243 communicates with the third oil passage 43. Specifically, the mandrel 24 in this embodiment is further provided with an oil drainage channel, one port of the oil drainage channel is communicated with the third oil passage channel 43, the other port of the oil drainage channel forms an oil drainage port 243, and the oil drainage port 243 is located on the side wall of the mandrel 24. The reversing structure 222 in this embodiment includes a sliding sleeve 2221, the sliding sleeve 2221 is connected to the annular punch hammer 221, an oil drainage groove 22211 is provided on the sliding sleeve 2221, the sliding sleeve 2221 is movably sleeved on the mandrel 24, and the sliding sleeve 2221 has an oil supply position and an oil drainage position. When the sliding sleeve 2221 is in the oil supply position, the oil drainage groove 22211 is closed to the oil drainage opening 243, so that oil in the third oil passage 43 is prevented from flowing into the oil drainage opening 243 to be drained. When the sliding sleeve 2221 is in the oil release position, the oil release groove 22211 communicates with the oil release port 243, so that the oil in the third oil passage 43 flows into the oil release port 243 for oil release.

Specifically, the reversing structure 222 in this embodiment further includes a reversing block 2222, the reversing block 2222 is disposed at one end of the annular ram 221 away from the middle joint 25 (i.e., the reversing block 2222 at the rear end of the annular ram 221 is inserted into the reversing slot 22212 at the front end of the sliding sleeve 2221), the sliding sleeve 2221 is provided with a reversing slot 22212 adapted to the reversing block 2222, the reversing block 2222 is movably disposed in the reversing slot 22212, and the annular ram 221 drives the sliding sleeve 2221 to move to the oil supply position or the oil drainage position through the reversing block 2222. With such a structural arrangement, when moving, the annular ram 221 drives the reversing block 2222 to move synchronously, the reversing block 2222 moves in the reversing slot 22212, and when the reversing block 2222 moves to a position abutting against the end of the reversing slot 22212, the annular ram 221 drives the sliding sleeve 2221 to move through the reversing block 2222. Specifically, the sliding sleeve 2221 in this embodiment is connected to the annular punch 221 through the reversing block 2222, the sliding sleeve 2221 in this embodiment is sleeved on the rear shaft body 245 of the mandrel 24, and the reversing slot 22212 is located at the front end of the sliding sleeve 2221.

In this embodiment, the reversing structure 222 further includes a reset part 2223, the reset part 2223 is sleeved on the mandrel 24, and a reset end of the reset part 2223 is connected to the annular punch hammer 221. With this arrangement, when the third oil passage 43 supplies oil, the oil in the third oil passage 43 pushes the annular punch 221 to move away from the middle joint 25 and press the reset piece 2223; subsequently, the sliding sleeve 2221 is moved to the oil release position, the oil pressure provided in the third oil passage 43 is insufficient to push the annular punch 221 to move further away from the intermediate joint 25, the annular punch 221 is pushed to move closer to the intermediate joint 25 under the action of the restoring member 2223, and the annular punch 221 is moved to a position abutting against the intermediate joint 25; subsequently, the third oil passage 43 starts to supply oil again, and the above-described operation is repeated to complete the back-and-forth impact process for the intermediate hammer.

In this embodiment, the sliding sleeve 2221 is further provided with a limit groove 22213, the reversing structure 222 further includes a limit pin 2224, the limit pin 2224 is disposed on the core shaft 24, and the limit pin 2224 is located in the limit groove 22213, so as to limit the position of the limit groove 22213 through the limit pin 2224. With the adoption of the structure, the movement of the sliding sleeve 2221 can be conveniently limited through the matching of the limiting groove 22213 and the limiting pin 2224, the condition that the movement range of the sliding sleeve 2221 is too large under the action of inertia is avoided, and the impact process is stably ensured to be performed orderly. Specifically, the limiting groove 22213 and the oil drainage groove 22211 are both located at the rear end of the sliding sleeve 2221, and the limiting pin 2224 on the rear shaft body 245 of the mandrel 24 is inserted into the limiting groove 22213 at the rear end of the sliding sleeve 2221.

Specifically, the impact portion 22 in this embodiment further includes a rear cylinder 223 and a rear end cap 224, the rear cylinder 223 is sleeved on the mandrel 24, the annular punch hammer 221 is located between the rear cylinder 223 and the mandrel 24, that is, the rear cylinder 223 is sleeved on the annular punch hammer 221. One end of the rear cylinder 223 is connected to the intermediate joint 25, and the other end of the rear cylinder 223 is connected to the rear end cap 224. The rear end cover 224 is arranged at the end of the rear cylinder 223, the front end of the rear end cover 224 is sleeved at the rear end of the sliding sleeve 2221, the rear end cover 224 is sleeved on the rear shaft body 245 of the mandrel 24, an annular groove is arranged in the middle of the rear end cover 224, the limiting groove 22213 and the oil drainage groove 22211 at the rear end of the sliding sleeve 2221 are both positioned in the annular groove, a fourth annular sealing cavity 34 is formed between the annular groove of the rear end cover 224 and the mandrel 24, the oil drainage port 243 is positioned in the fourth annular sealing cavity 34, the mandrel 24 is further provided with a fourth oil passage 44, and the fourth oil passage 44 is communicated with the fourth annular sealing cavity 34. With such a structural arrangement, when the sliding sleeve 2221 moves to the oil drainage position, the oil in the third oil passage 43 will flow into the fourth annular seal cavity 34 from the oil drainage port 243 through the oil drainage passage, and flow back into the oil tank through the fourth oil passage 44, so as to complete the oil drainage process. Specifically, the restoring member 2223 in this embodiment is a spring, which is installed between the rear end cap 224 and the annular punch 221, and presses the front end of the annular punch 221 against the intermediate joint 25.

In this embodiment, the first hydraulic driving structure (i.e. the extruding cylinder) includes a cylinder assembly 12 and a piston assembly 13, the piston assembly 13 is movably disposed in the cylinder assembly 12, and a rod 131 of the piston assembly 13 is drivingly connected to the mandrel 24. The rod body 131 of the piston assembly 13 extends from the front end of the cylinder assembly 12 and is abutted with the mandrel 24 of the ram cylinder, and is screwed and fixed by the connecting sleeve 50. The piston assembly 13 is internally provided with a channel which is the same as the channel inside the mandrel 24, the butt joint of the rod body 131 and the mandrel 24 is correspondingly communicated, and rock debris and hydraulic oil can be conveyed to the corresponding channel inside the mandrel 24 from the rear end of the cylinder body assembly 12 of the extrusion cylinder through the piston assembly 13. With this arrangement, the mandrel 24 can be stably driven by the rod 131 of the piston assembly 13 to provide a stable static pressure to the rock fragments.

Specifically, when the annular punch 221 is pressed against the intermediate joint 25, the front end of the reversing groove 22212 of the sliding sleeve 2221 contacts the reversing block 2222, the rear end of the limiting groove 22213 of the sliding sleeve 2221 contacts the limiting pin 2224, and the oil drain opening 243 of the third oil passage 43 is closed by the sliding sleeve 2221. When the annular punch hammer 221 compresses the spring to the maximum position, the rear end of the reversing groove 22212 of the sliding sleeve 2221 is in contact with the reversing block 2222, the front end of the limiting groove 22213 of the sliding sleeve 2221 is in contact with the limiting pin 2224, and the oil drain port 243 of the third oil passage 43 is communicated with the oil drain groove 22211 of the sliding sleeve 2221.

The working principle of the rock debris impact compression tool in the embodiment is as follows:

firstly, rock debris is conveyed from the rear end of a cylinder body assembly 12 of the extrusion cylinder to a communication hole 2131 of the front end cover 213 through a piston assembly 13, a first rock debris passage 11 and a second rock debris passage 23 (the communication hole 2131 is a plug rod hole);

secondly, oil is supplied to the first annular sealing cavity 31 from the rear end of the cylinder body assembly 12 of the extrusion cylinder through the piston assembly 13 and the first oil passage 41, so that the annular piston 212 pushes the plug rod 214 to extend forwards, rock debris in the plug rod hole is pushed to the extrusion surface of the front end cover 213, and the process is stopped when the head of the plug rod 214 is flush with the extrusion surface;

thirdly, oil is supplied to a rear cavity of the extrusion cylinder from the rear end of a cylinder body assembly 12 of the extrusion cylinder, a piston assembly 13 pushes the whole pressure head cylinder to extend forwards through a mandrel 24, rock debris on an extrusion surface is pushed to an upper closed borehole, and the rock debris is compressed by static pressure;

fourthly, supplying oil to a third annular sealing cavity 33 from the rear end of a cylinder body assembly 12 of the extrusion cylinder through a third oil path channel 43 of a piston assembly 13, pressing an annular impact hammer 221 on the middle joint 25 at the moment, closing an oil drain port 243 by a sliding sleeve 2221, pushing the annular impact hammer 221 to compress a spring to move backwards, enabling a reversing block 2222 of the annular impact hammer 221 to move backwards for a certain distance and then to be in contact with the rear end of a reversing groove 22212 to drive the sliding sleeve 2221 to move backwards, when the sliding sleeve 2221 moves backwards along with the annular impact hammer 221 to the contact position of the front end of a limiting groove 22213 and a limiting pin 2224, enabling an oil drain groove 22211 of the sliding sleeve 2221 to be communicated with the oil drain port 243 of a third oil path channel 43, discharging the hydraulic oil in the third oil path channel 43 and the third annular sealing cavity 33 from a fourth annular sealing cavity 34 and a fourth oil path channel 44 to enable the spring to push the annular impact hammer to move forwards, enabling the reversing block 2 to be separated from the rear end of the reversing groove 22212 and to be in contact with the front end of the reversing groove 22212 after moving forwards for a certain distance, driving the sliding sleeve 2221 to move forwards, when the annular impact hammer 221 impacts the middle joint 25, the sliding sleeve 2221 moves to a position where the rear end of the limiting groove 22213 is in contact with the limiting pin 2224, the sliding sleeve 2221 closes the oil drainage port 243 of the third oil passage 43 again, the annular impact hammer 221 is pushed by hydraulic oil to compress the spring to move backwards again, the annular impact hammer 221 is driven to impact the middle joint 25 in cycles, impact force is transmitted to rock debris through the front cylinder 211 and the front end cover 213, when the rock debris is compacted, oil supply to the third annular sealing cavity 33 is stopped, and the annular impact hammer 221 stops impacting;

fifthly, oil supply to a rear cavity of the extrusion cylinder and the first annular sealing cavity 31 is stopped, oil is supplied to a front cavity of the extrusion cylinder from the rear end of a cylinder body assembly 12 of the extrusion cylinder, the piston assembly 13 drives the pressure head cylinder to retract through the mandrel 24, a front end cover 213 is separated from the compacted rock debris, oil is supplied to a second annular sealing cavity 32 through the piston assembly 13 and the second oil passage 42, the plug rod 214 retracts, and the oil supply is stopped when the pressure head cylinder and the plug rod 214 retract to the initial position;

and the sixth step repeats the compression process of the first to fifth steps.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the rock debris is compressed in a mode of combined action of static pressure and impact, the rock debris can be compacted in a shorter time at a lower static pressure load, the compression efficiency of the rock debris in the well is obviously improved, and meanwhile, the stress state of the drilling rig is improved due to the reduction of the static pressure load, so that the reliability of action is improved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.