阅读说明：本技术 一种新型连续油管用液压双向震击器 (Novel hydraulic bidirectional jar for coiled tubing ) 是由 彭文玥 石擎天 李伟 严佳琳 刘德举 董亚 孙洪振 于 2021-01-12 设计创作，主要内容包括：本发明公开了一种新型连续油管用液压双向震击器,包括下接头1,转换接头2,液压油缸3,黄油缸4,缸盖5,上接头6,芯轴7,震击活塞8,并帽9,防松螺钉10,连接短节11,下活塞12,上活塞13,密封件14,O型密封件15,防尘圈16,O型密封圈17,金属密封组件18,注油孔19,所述下接头1,转换接头2,液压油缸3,黄油缸4,缸盖5连接为一体,形成外壳部分,芯轴7,震击活塞8,并帽9,连接短节11,上接头6连接为一体式,形成芯轴部分,震击活塞8实现全金属密封,下击或上击时液压油只能通过节流孔8-1,液压油腔室设计有下活塞12,黄油腔室下部有上活塞13,有效平衡震击使的脉冲压力,提高了产品的可靠性。(The invention discloses a novel hydraulic two-way jar for a continuous oil pipe, which comprises a lower joint 1, an adapter 2, a hydraulic oil cylinder 3, a butter cylinder 4, a cylinder cover 5, an upper joint 6, a mandrel 7, a jar piston 8, a nut 9, a locking screw 10, a connecting short section 11, a lower piston 12, an upper piston 13, a sealing element 14, an O-shaped sealing element 15, a dustproof ring 16, an O-shaped sealing ring 17, a metal sealing component 18 and an oil filling hole 19, wherein the lower joint 1, the adapter 2, the hydraulic oil cylinder 3, the butter cylinder 4 and the cylinder cover 5 are connected into a whole to form a shell part, the mandrel 7, the jar piston 8, the nut 9, the connecting short section 11 and the upper joint 6 are connected into a whole to form a mandrel part, the jar piston 8 realizes full metal sealing, hydraulic oil can only pass through a throttling hole 8-1 during lower impact or upper impact, a lower piston 12 is designed in a hydraulic oil chamber, and the upper piston 13 is arranged, effectively balance the impulse pressure caused by the shock and improve the reliability of the product.)

1. The utility model provides a novel two-way jar of hydraulic pressure for coiled tubing which characterized in that: the upper end of a lower joint (1) is connected with an adapter (2) through threaded connection, an oil filling hole (19) is designed on the adapter (2), the upper end of the adapter (2) is connected with a hydraulic oil cylinder (3) through threaded connection, the hydraulic oil cylinder (3) is connected with a yellow oil cylinder (4) through threaded connection, the upper end of the yellow oil cylinder (4) is connected with a cylinder cover (5) through threaded connection to form a jar shell part, a jar piston (8), a combining cap (9), a locking screw (10) and a mandrel (7) are connected into a whole through threads, the lower end of a connecting short section (11) is connected with the mandrel (7), the upper end of the connecting short section is connected with an upper joint (6) into a whole to form a jar core shaft part, the shell part and the mandrel part can realize axial sliding, and a throttling hole (8-1) is designed on the jar piston (, a valve core (20) is arranged in the throttling hole (8-1), and throttling energy storage is realized through the throttling hole (8-1) and the valve core (20) in the process of pulling up or pressing down the pipe column, so that up-stroke or down-stroke bidirectional jarring is finally realized.

2. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: connect nipple joint (11) to be equipped with spline (11-3) and grease jar (4) and realize the cooperation, ensure that dabber part and shell part can only axial displacement, provide torsion resistance, set up the device inside jar simultaneously, effectively prevented the corruption and other adverse effects of drilling fluid, mud etc. to the device, prolonged product life, the reliability of product has been improved, profitable each key tooth of spline (11-3) and connect nipple joint (11), grease jar (4) can design into three independent parts, so that the maintenance after jar uses.

3. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: the upper portion of the butter cylinder (4) is connected with the cylinder cover (5), the lower portion of the butter cylinder is provided with the upper piston (13), a butter chamber for providing lubrication is formed, the chamber can be filled with butter for lubrication and can also adopt lubricating oil, hydraulic oil, sealing grease and the like, the upper piston (13) has a floating function, instantaneous high pressure or low pressure of the butter cylinder can be effectively solved when the jar is shocked, the buffer pressure fluctuation is realized, and the butter loss is prevented.

4. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: dabber (7), top connection (6) are connected as an organic whole through connecting nipple joint (11), have sealing function at dabber (7) top connection (6) and the terminal surface of connecting nipple joint (11) contact, reach the design moment of torsion through screwing up the screw thread, arouse the sealed of this part, have O type sealing washer (17) at its radial design simultaneously and play supplementary sealing function, and dual protection has effectively prevented inside the drilling fluid entering instrument in the pipe diameter.

5. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: the jar piston (8) is provided with a throttling hole (8-1), an oil passing hole (8-2), a lower sealing surface (8-3) and an upper sealing surface (8-4), a valve core (20) is arranged in the throttling hole (8-1), throttling energy storage is realized by the gap between the throttling hole (8-1) and the valve core (20) in the process of upward or downward impact of the jar, surface lubrication is realized by providing hydraulic oil through the oil passing hole (8-2), the abrasion of the jar piston (8) is reduced, the service life of a product is prolonged, after the jar piston (8) passes through a necking part on a hydraulic oil cylinder (3), energy is released to accelerate a jar string, more beneficially, the valve core (20) can be arranged into an upward impact section and a downward impact section, the outer diameter of the valve core of the downward impact section is slightly larger than that of the upward impact section, so that the downward impact force is always larger than the upward impact force, the fitting engineering is practical, and the pipe column is prevented from being broken.

6. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: the mandrel (7) and the combined cap (9) are connected into a whole through threads, the limiting and sealing of the jarring piston (8) are realized, during downward striking, an upper sealing surface (8-4) on the jarring piston (8) is in contact with a limiting chamfer (9-1) on the combined cap (9) to form sealing, the interior of the cap (9) is sealed with the mandrel (7) through a metal sealing component (18), and the looseness of connecting threads is prevented through a locking screw (10); when in upward impact, a lower sealing surface (8-3) on the impact piston (8) is contacted with a limiting chamfer (7-1) on the mandrel (7) to form sealing; therefore, hydraulic oil can only flow through the throttling hole (8-1) during downward impact or upward impact, all-metal sealing of the working process of the impact piston (8) is realized, the sealing effect of the part under the high-temperature working condition at the bottom of the well is improved, and the reliability of the product is improved.

7. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: the core shaft (7) and the cap (9) are connected into a whole through threads, the jolting piston (8) is limited and sealed, the cap (9) is internally sealed with the core shaft (7) through the metal sealing component (18), hydraulic oil can only pass through the throttling hole (8-1) during downward hammering or upward hammering, and the tool throttling energy storage effect is guaranteed.

8. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: it has piston (12) down to design its inside design of oil filler point (19) on crossover sub (2), piston (12) are inside to realize sealedly with dabber (7) through sealing member (14) down, it is sealed that the outside realizes through O type sealing member (15) and crossover sub (2), hydraulic cylinder (3) upper portion is sealed with dabber (7) realization through sealing member (14), finally form the hydraulic oil cavity, be floating with crossover sub (2) and lower piston (12) design, the beneficial characteristics are that instantaneous high pressure or low pressure appear in the hydraulic oil cavity when can effectively solving the shock, play the equilibrium pressure effect, the life of this position sealing member is prolonged.

9. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: positioning screws (11-6) are arranged on the connecting short section (11), and after the upper joint (6) is connected with the connecting short section (11), the number of the positioning screws (11-6) is not less than 1, so that the effect of preventing thread back-off is achieved, and the reliability of the tool is improved.

10. The novel hydraulic two-way jar for coiled tubing of claim 1, characterized in that: a breathing port (2-1) is arranged on the adapter (2), a breathing port (4-1) is arranged on the yellow oil cylinder (4), the breathing port (2-1) is positioned below the lower piston (12) after installation is completed, the breathing port (4-1) is positioned below the upper piston (13), and the lower piston (12) and the upper piston (13) can float during jarring.

Technical Field

The invention belongs to the technical field of underground tools of oil and gas drilling engineering, and relates to a novel hydraulic bidirectional jar for a coiled tubing.

Background

The coiled tubing operation technology has the characteristics of high flexibility and rigidity, high automation degree, capability of operating under pressure and the like, and is rapidly developed in recent years, and at present, the technology almost relates to all conventional drilling rod and tubing operations. Because the diameter of the coiled tubing is small and the tensile strength is limited, when the required lifting force after the coiled tubing is blocked exceeds 80 percent of the yield strength of the coiled tubing in the operation process, the coiled tubing cannot be directly lifted to realize the blockage removal. The existing technical means is that the jar repeatedly gives upward or downward jarring force to the stuck point, so that the stuck point is gradually loosened, and the coiled tubing string is unlocked.

In the hydraulic jar commonly used at the present stage, a sealing element of a jar piston of the hydraulic jar adopts a rubber sealing element, and sealing failure is easy to occur under the effects of high temperature and repeated abrasion at the well bottom, so that the jar force of a product is insufficient or even the jar effect is lost, and the reliability of the product is not high.

Disclosure of Invention

The invention aims to provide a novel hydraulic bidirectional jar for a continuous oil pipe, which solves the problems that a jar piston in the prior art is easy to generate sealing failure, the product reliability is not high and the like.

The technical scheme adopted by the invention is as follows:

the upper end of the lower joint 1 is connected with the conversion joint 2 through threaded connection, an oil filling hole 19 is designed in the conversion joint 2, the upper end of the conversion joint 2 is connected with the hydraulic oil cylinder 3 through threaded connection, the hydraulic oil cylinder 3 is connected with the grease cylinder 4 through threaded connection, and the upper end of the grease cylinder 4 is connected with the cylinder cover 5 through threaded connection to form a shell part of the jar knocker. The jar piston 8, the nut 9, the anti-loosening screw 10 and the mandrel 7 are connected into a whole through threads, the lower end of the connecting short section 11 is connected with the mandrel 7, and the upper end of the connecting short section is connected with the upper connector 6 into a whole, so that the core shaft part of the jar is formed. The connecting short section 11 is provided with a mandrel connecting thread 11-1, a mandrel sealing ring groove 11-2, a spline 11-3, an upper joint sealing ring groove 11-4, an upper joint connecting thread 11-5 and a positioning screw 11-6, and the torque transmission capacity of the tool is realized through the matching of the spline 11-3 and a key groove in a grease cylinder 4, the hydraulic oil cylinder 3 is provided with a guide angle 3-1 and a necking inner surface 3-2, the jarring piston 8 is provided with a throttling hole 8-1, an oil passing hole 8-2, a lower sealing surface 8-3, an upper sealing surface 8-4, an outer surface 8-5 and an inner surface 8-6. When the hydraulic jar is impacted downwards, the impact piston 8 enters the inner surface 3-2 of the necking on the hydraulic oil cylinder 3 through the guide angle 3-1, the outer surface 8-5 of the impact piston is in interference fit with the inner surface 3-2 of the necking to form a seal, the upper sealing surface 8-4 of the impact piston 8 is in contact with the limiting chamfer 9-1 of the combining cap 9 to form a metal seal, and the core shaft 7 and the combining cap 9 form a seal through the metal sealing component 18, so that hydraulic oil can only enter the upper cavity from the lower cavity through the throttling hole 8-1, the throttling hole 8-1 is internally provided with the valve core 20, the flow area of the hydraulic oil is adjusted by adjusting the gap between the valve core 20 and the throttling hole 8-1, and further the delay time of the jar is adjusted, the smaller the flow area is, the longer the delay time of the jar is, and the; the larger the flow area, the shorter the delay time of the jar and the smaller the jar force. When the jar piston 8 passes through the neck part on the hydraulic oil cylinder 3, the energy is released to accelerate the pipe column to move downwards and form an impact force on the pipe column. When the same upward impact is carried out, the lower sealing surface 8-3 on the impact piston 8 is in contact with the limiting chamfer 7-1 on the mandrel 7 to form sealing, hydraulic oil can only enter the lower chamber from the upper chamber through the throttling hole 8-1, the pipe column is gradually lengthened through throttling energy storage, and when the impact piston 8 passes through the inner surface 3-2 of the necking part on the hydraulic oil cylinder 3, energy is released to accelerate the pipe column to move upwards, and finally an impact force is formed on the pipe column.

Compared with the prior art, the invention has the beneficial effects that:

1) the jarring piston of the hydraulic bidirectional jar adopts metal sealing, so that the high-temperature resistance and wear resistance of the tool are improved;

2) after the jar is produced and molded, the overflowing area can be adjusted by adjusting the gap between the valve core and the throttling hole, so that the jar impact force can be adjusted, and finally the jar can meet the use requirements of different bottom temperature and different hydraulic oil products;

3) the valve core can be arranged into an upper impact section and a lower impact section, the outer diameter of the valve core of the lower impact section is slightly larger than that of the upper impact section, the lower impact shock force is always larger than the upper impact shock force, the pipe column is attached to the actual engineering, and the pipe column is prevented from being broken.

Drawings

FIG. 1 is a schematic structural view of a novel hydraulic two-way jar for coiled tubing;

in the figure, 1, a lower joint, 2, a conversion joint, 3, a hydraulic oil cylinder, 4, a yellow oil cylinder, 5, a cylinder cover, 6, an upper joint, 7, a mandrel, 8, a jarring piston, 9, a nut, 10, a locking screw, 11, a connecting short joint, 12, a lower piston, 13, an upper piston, 14, a sealing element, 15, an O-shaped sealing element, 16, a dust ring, 17, an O-shaped sealing ring, 18, a metal sealing component, 19, an oil injection hole and 20, a valve core are arranged.

FIG. 2 is an enlarged, fragmentary view of the jar piston during operation;

in the figure, 3-1 is a guide angle, 3-2 is the inner surface of a necking, 7-1 is a mandrel limiting chamfer, 7-2 is the outer surface of a mandrel, and 9-1 is a nut limiting chamfer.

FIG. 3 is a schematic view of a jar piston configuration;

in the figure, 8-1 is throttling hole, 8-2 is oil passing hole, 8-3 is lower sealing surface, 8-4 is upper sealing surface, 8-5 is outer surface, and 8-6 is inner surface.

FIG. 4 is a schematic view of a connection sub structure;

in the figure, 11-1 is mandrel connecting thread, 11-2 is mandrel sealing ring groove, 11-3 is spline, 11-4 is upper joint sealing ring groove, 11-5 is upper joint connecting thread, and 11-6 is positioning screw.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the structure of the invention is that the product comprises a lower joint 1, a conversion joint 2, a hydraulic oil cylinder 3, a butter cylinder 4, a cylinder cover 5, an upper joint 6, a mandrel 7, a jarring piston 8, a nut 9, a locking screw 10, a connecting short section 11, a lower piston 12, an upper piston 13, a sealing component 14, an O-shaped sealing component 15, a dust ring 16, an O-shaped sealing ring 17, a metal sealing component 18, an oil filling hole 19, a valve core 20 and the like. A breathing port 2-1 is designed on the adapter 2, a breathing port 4-1 is designed on the butter cylinder 4, the breathing port 2-1 is positioned below the lower piston 12 after installation is finished, and the breathing port 4-1 is positioned below the upper piston 13, so that the lower piston 12 and the upper piston 13 can float during jarring. The sealing element of the jar piston 8 is designed to be metal sealing, the sealing effect and the service life of the jar piston are effectively prolonged, and the reliability of the product is improved.

Referring to fig. 2, a guide angle 3-1 and a necking inner surface 3-2 are arranged on a hydraulic oil cylinder 3, a limiting chamfer 7-1 is arranged on a mandrel 7, a mandrel outer surface 7-2 and a limiting chamfer 9-1 is arranged on a cap 9, the two ends of a jarring piston 8 and the limiting chamfers 7-1 and 9-1 form metal sealing through the sealing of a metal sealing component 18 and the pressure between the cap 9 and the mandrel 7, and the sealing effect of the jarring piston is improved.

Referring to fig. 3, the jarring piston 8 is provided with a throttling hole 8-1, an oil passing hole 8-2, a lower sealing surface 8-3, an upper sealing surface 8-4, an outer surface 8-5 and an inner surface 8-6, metal sealing is formed by matching the lower sealing surface 8-3 with a mandrel limiting chamfer 7-1, the upper sealing surface 8-4 is matched with a cap limiting chamfer 9-1 to form metal sealing, the outer surface 8-5 is matched with an inner surface 3-2 of an upper necking of a hydraulic oil cylinder 3 to form metal sealing, hydraulic oil can only flow through the throttling hole 8-1, a valve core 20 is arranged in the throttling hole 8-1, and the flow passing area of the hydraulic oil is adjusted by adjusting a gap between the valve core 20 and the throttling hole 8-1, so that the delay time of the jar is. Meanwhile, the throttling hole 8-1 is arranged in the jarring piston 8 and is not arranged on the inner surface and the outer surface of the jarring piston, so that the throttling effect is effectively prevented from being influenced by inconsistent thermal deformation of dissimilar materials, and the throttling reliability is improved. Lubricating oil is provided through the oil passing hole 8-2 to lubricate the outer surface 8-5 and the inner surface 8-6 during the shock.

Referring to fig. 4, a mandrel connecting thread 11-1, a mandrel sealing ring groove 11-2, a spline 11-3, an upper joint sealing ring groove 11-4, an upper joint connecting thread 11-5 and a positioning screw 11-6 are arranged on a connecting short section 11, the mandrel connecting thread 11-1 is connected with a mandrel 7 into a whole, the upper joint connecting thread 11-5 is connected with an upper joint 6 into a whole, the internal pressure of a sealing ring sealing pipe column is installed at the positions of the mandrel sealing ring groove 11-2 and the upper joint sealing ring groove 11-4, and the positioning screw 11-6 is installed at the connecting part of the upper joint 6 and the connecting short section 11 to prevent tripping, so that the reliability of the tool is improved.

The working principle of the invention is as follows:

the upper end of the lower joint 1 is connected with the conversion joint 2 through threaded connection, an oil filling hole 19 is designed in the conversion joint 2, the upper end of the conversion joint 2 is connected with the hydraulic oil cylinder 3 through threaded connection, the hydraulic oil cylinder 3 is connected with the grease cylinder 4 through threaded connection, and the upper end of the grease cylinder 4 is connected with the cylinder cover 5 through threaded connection to form a shell part of the jar knocker. The jar piston 8, the nut 9, the anti-loosening screw 10 and the mandrel 7 are connected into a whole through threads, the lower end of the connecting short section 11 is connected with the mandrel 7, and the upper end of the connecting short section is connected with the upper connector 6 into a whole, so that the core shaft part of the jar is formed. The connecting short section 11 is provided with a mandrel connecting thread 11-1, a mandrel sealing ring groove 11-2, a spline 11-3, an upper joint sealing ring groove 11-4, an upper joint connecting thread 11-5 and a positioning screw 11-6, and the torque transmission capacity of the tool is realized through the matching of the spline 11-3 and a key groove in a grease cylinder 4, the hydraulic oil cylinder 3 is provided with a guide angle 3-1 and a necking inner surface 3-2, the jarring piston 8 is provided with a throttling hole 8-1, an oil passing hole 8-2, a lower sealing surface 8-3, an upper sealing surface 8-4, an outer surface 8-5 and an inner surface 8-6. When the hydraulic jar is impacted downwards, the impact piston 8 enters the inner surface 3-2 of the necking on the hydraulic oil cylinder 3 through the guide angle 3-1, the outer surface 8-5 of the impact piston is in interference fit with the inner surface 3-2 of the necking to form a seal, the upper sealing surface 8-4 of the impact piston 8 is in contact with the limiting chamfer 9-1 of the combining cap 9 to form a metal seal, and the core shaft 7 and the combining cap 9 form a seal through the metal sealing component 18, so that hydraulic oil can only enter the upper cavity from the lower cavity through the throttling hole 8-1, the throttling hole 8-1 is internally provided with the valve core 20, the flow area of the hydraulic oil is adjusted by adjusting the gap between the valve core 20 and the throttling hole 8-1, and further the delay time of the jar is adjusted, the smaller the flow area is, the longer the delay time of the jar is, and the; the larger the flow area, the shorter the delay time of the jar and the smaller the jar force. When the jar piston 8 passes through the neck part on the hydraulic oil cylinder 3, the energy is released to accelerate the pipe column to move downwards and form an impact force on the pipe column. When the same upward impact is carried out, the lower sealing surface 8-3 on the impact piston 8 is in contact with the limiting chamfer 7-1 on the mandrel 7 to form sealing, hydraulic oil can only enter the lower chamber from the upper chamber through the throttling hole 8-1, the pipe column is gradually lengthened through throttling energy storage, and when the impact piston 8 passes through the inner surface 3-2 of the necking part on the hydraulic oil cylinder 3, energy is released to accelerate the pipe column to move upwards, and finally an impact force is formed on the pipe column.

The shock piston 8 is provided with a throttling hole 8-1, a valve core 20 is arranged in the throttling hole 8-1, throttling energy storage is realized through the throttling hole 8-1 and the valve core 20 in the process of pulling up or pressing down the pipe column, and finally, up-shock or down-shock bidirectional shock is realized.

The connection short section 11 is provided with a spline 11-3 to be matched with the grease cylinder 4, so that the mandrel part and the shell part can only move axially, torsion resistance is provided, and meanwhile, the device is arranged inside the jar, so that corrosion and other adverse effects of drilling fluid, mud and the like on the device are effectively prevented, the service life of the product is prolonged, and the reliability of the product is improved.

The upper portion of the grease cylinder 4 is connected with the cylinder cover 5, the lower portion of the grease cylinder is provided with the upper piston 13, a grease chamber for providing lubrication is formed, the chamber can be filled with grease for lubrication and can also adopt lubricating oil, hydraulic oil, sealing grease and the like, the upper piston 13 has a floating function, instantaneous high pressure or low pressure of the grease cylinder can be effectively solved when the jar is shocked, buffering pressure fluctuation is achieved, and grease loss is prevented.

Dabber 7, top connection 6 connect as an organic wholely through connecting nipple joint 11, have sealing function at dabber 7 top connection 6 and the terminal surface of connecting the contact of nipple joint 11, through screwing up the screw thread and reach the design moment of torsion, arouse the sealed of this part, have O type sealing washer 17 at its radial design simultaneously and play supplementary sealing function, inside dual protection has effectively prevented the drilling fluid entering instrument in the pipe diameter.

The adapter 2 is provided with a breathing port 2-1, the butter cylinder 4 is provided with a breathing port 4-1, the breathing port 2-1 is positioned below the lower piston 12 after installation is completed, and the breathing port 4-1 is positioned below the upper piston 13, so that the lower piston 12 and the upper piston 13 can float during jarring.