阅读说明：本技术 一种新型稠油井用注剂防结蜡装备 (Novel heavy oil well is with annotating agent wax deposition equipment ) 是由 卜现朝 张怀力 杜瑞峰 于 2021-03-15 设计创作，主要内容包括：本发明提供一种新型稠油井用注剂防结蜡装备。该新型稠油井用注剂防结蜡装备,包括密封外筒,所述密封外筒顶部端面设置有第一螺纹槽,所述第一螺纹槽配套设置有端盘,所述密封外筒远离第一螺纹槽端设置有安装槽,所述安装槽内设置有加热筒,所述密封外筒端面靠近安装槽位置设置有连接盘,所述端盘底部端面固定连接有第一外螺纹环,所述端盘位于第一外螺纹环端面贯穿设置有第一通孔,所述端盘端面位于第一外螺纹环外侧均匀设置有多个第一连接孔。本发明通过多个连接盘及多个密封外筒进行连接,形成稠油井主体,并在稠油井顶部和底部连接有端盘,其形成稠油井整体,其结构简单,密封内筒采用38CrMoAl圆钢,内壁光滑,降低密封内筒结蜡。(The invention provides novel wax-proofing device for an injection agent for a heavy oil well. This novel wax equipment is prevented to viscous crude well oiling, including sealed urceolus, sealed urceolus top end face is provided with first thread groove, the supporting end plate that is provided with of first thread groove, sealed urceolus is kept away from first thread groove end and is provided with the mounting groove, be provided with the cartridge heater in the mounting groove, sealed urceolus terminal surface is close to the mounting groove position and is provided with the connection pad, the first external screw thread ring of end plate bottom end face fixedly connected with, the end plate is located first external screw thread ring terminal surface and runs through and is provided with first through-hole, the end plate terminal surface is located the first external screw thread ring outside and evenly is provided with a plurality of first. The thick oil well is characterized in that the sealing inner cylinder is made of 38CrMoAl round steel, the inner wall of the sealing inner cylinder is smooth, and the wax deposition of the sealing inner cylinder is reduced.)

1. The utility model provides a novel wax equipment is prevented to thick oil well with annotating agent, includes sealed urceolus (1), its characterized in that: sealed urceolus (1) top terminal surface is provided with first thread groove (11), first thread groove (11) are supporting to be provided with end plate (2), sealed urceolus (1) is kept away from first thread groove (11) end and is provided with mounting groove (12), be provided with cartridge heater (4) in mounting groove (12), sealed urceolus (1) terminal surface is close to mounting groove (12) position and is provided with connection pad (3).

2. The novel agent-injecting and wax-proofing device for the heavy oil well is characterized in that: end disc (2) bottom terminal surface fixedly connected with first external screw thread ring (21), end disc (2) are located first external screw thread ring (21) terminal surface and run through and are provided with first through-hole, end disc (2) terminal surface is located first external screw thread ring (21) outside and evenly is provided with a plurality of first connecting holes (22), first external screw thread ring (21) and first thread groove (11) position cooperate, and first external screw thread ring (21) and first thread groove (11) threaded connection.

3. The novel agent-injecting and wax-proofing device for the heavy oil well is characterized in that: connection pad (3) bottom terminal surface fixedly connected with second external screw thread ring (31), connection pad (3) top terminal surface fixedly connected with third external screw thread ring (32), third external screw thread ring (32) are the same with second external screw thread ring (31) external diameter, connection pad (3) are located second external screw thread ring (31) terminal surface and run through and are provided with the second through-hole, connection pad (3) terminal surface is located second external screw thread ring (31) outside and evenly is provided with a plurality of second connecting holes (33), third external screw thread ring (32) cooperate with mounting groove (12) position, and third external screw thread ring (32) and mounting groove (12) threaded connection.

4. The novel agent-injecting and wax-proofing device for the heavy oil well is characterized in that: the heating tube (4) terminal surface evenly is provided with a plurality of mounting holes (41), and mounting hole (41) are embedded setting, mounting hole (41) position is supporting to be provided with heating pipe (42), heating pipe (42) and mounting hole (41) sliding connection, heating pipe (42) terminal surface solid fixed ring is connected with connecting piece (43), connecting piece (43) are embedded setting with heating tube (4).

5. The novel agent-injecting and wax-proofing device for the heavy oil well is characterized in that: the heating cylinder (4) inner side wall is evenly fixedly connected with a plurality of connecting columns (44), the connecting columns (44) penetrate through the sealing outer cylinder (1), and the connecting columns (44) are far away from the sealing inner cylinder (45) which is fixedly connected with the heating cylinder (4).

6. The novel agent-injecting and wax-proofing device for the heavy oil well is characterized in that: the sealing inner cylinder (45) is made of 38CrMoAl round steel, and the inner wall of the sealing inner cylinder is smooth.

Technical Field

The invention relates to the technical field of wax deposition prevention equipment for thick oil wells, in particular to novel wax deposition prevention equipment for an injection agent for a thick oil well.

Background

The wax precipitation of oil well includes two processes, that is, the wax is separated from the oil and then is gathered and adhered to the wall of the oil pipe. The wax originally dissolved in petroleum is condensed out in the process of exploitation because the dissolving capacity of petroleum to the wax is reduced. The dissolving power of a certain amount of petroleum is also constant when the composition, temperature and pressure of the petroleum are not changed, and a certain amount of paraffin can be dissolved. When the oil composition, temperature and pressure change and the dissolving power is reduced, a part of wax is separated out from the oil. We next studied petroleum.

Composition of petroleum

Under the same temperature condition, the wax dissolving power of the light oil is larger than that of the heavy oil, the more light fraction contained in the crude oil, the lower the crystallization temperature of the wax, namely the wax is not separated out, and the more the wax is kept in a dissolved state. The amount of wax dissolved by any one of the oils decreases with decreasing temperature. Therefore, at high temperatures, the amount of dissolved wax is partly condensed out as the temperature drops. Under the same wax content, the wax crystallization temperature of heavy oil is higher than that of light oil, so that petroleum with less light components is obtained, and the wax is easy to condense out.

Mechanical impurities in crude oil

The fine sand grains and mechanical impurities in the oil become the crystallization core of the paraffin wax, so that the wax crystals are easy to coalesce and grow, and the wax precipitation process is accelerated. When the water content in the oil is increased, the heat capacity of water is greater than that of the oil, so that the temperature reduction of the liquid flow can be reduced, and in addition, due to the increase of the water content, a continuous water film is easily formed on the wall of the oil pipe, and paraffin is not easy to deposit on the pipe wall. Thus, as the water content of the well increases, the extent of wax deposition is reduced. However, wax deposition is more serious when the water content is low, because the salt in the water is separated out and deposited on the pipe wall, which is beneficial to the aggregation of wax crystals.

The applicant finds that a Chinese patent discloses a pumping wax-proof device for a heavy oil well through retrieval when applying the invention, the application number of the device is '201810728047.8', and the device comprises a sealing outer cylinder, a sand-proof short joint, a sealing sleeve, a sealing piston, a flowing outer cylinder, a spring mandrel, an adjusting gasket and a lower joint. The thick oil well pumping wax-prevention device is connected to the lower part of a pumping pipe column, and is automatically closed when a liquid column in an oil pipe rises to a preset height, so that bottom liquid is prevented from continuously flowing into the pipe column, crude oil is prevented from reaching a wax precipitation point, a pumping tool is guaranteed to be smoothly lifted and lowered in the oil pipe, but the wax precipitation phenomenon can still occur in the oil flowing process, and the effect is that the symptoms are treated and the causes are not treated.

The oil layer permeability is reduced due to the high wax content of the crude oil. In oil and gas exploitation, wax is separated and precipitated from oil, and continuous wax precipitation causes blockage of an oil production layer, reduction of oil well yield and even production stoppage, and brings troubles to production. The wax deposition of the oil well is one of the outstanding problems affecting the high and stable yield of the oil well, and the problem of the oil and gas production is urgently needed to be solved by seeking a more reasonable method. Therefore, a novel agent-injecting and wax-proofing device for a heavy oil well is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides novel wax deposition prevention equipment for an injection agent for a heavy oil well, which solves the problem of wax deposition in the heavy oil well.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a novel wax equipment is prevented to viscous crude well with annotating agent, includes sealed urceolus, sealed urceolus top terminal surface is provided with first thread groove, the supporting end disc that is provided with of first thread groove, sealed urceolus is kept away from first thread groove end and is provided with the mounting groove, be provided with the cartridge heater in the mounting groove, sealed urceolus terminal surface is close to the mounting groove position and is provided with the connection pad.

Preferably, the end disc bottom end face is fixedly connected with a first external thread ring, the end disc is located the first external thread ring end face and penetrates through and is provided with a first through hole, the end disc end face is located the first external thread ring outer side and is evenly provided with a plurality of first connecting holes, the first external thread ring is matched with the first thread groove in position, and the first external thread ring is in threaded connection with the first thread groove.

Preferably, the bottom end face of the connecting plate is fixedly connected with a second external thread ring, the top end face of the connecting plate is fixedly connected with a third external thread ring, the third external thread ring is identical to the second external thread ring in outer diameter, the connecting plate is located on the end face of the second external thread ring and penetrates through a second through hole, a plurality of second connecting holes are uniformly formed in the position, located on the outer side of the second external thread ring, of the connecting plate end face, the third external thread ring is matched with the mounting groove in position, and the third external thread ring is in threaded connection with the mounting groove.

Preferably, the heating cylinder terminal surface evenly is provided with a plurality of mounting holes, and the mounting hole is embedded setting, the supporting heating pipe that is provided with in mounting hole position, heating pipe and mounting hole sliding connection, the solid fixed ring of heating pipe terminal surface is connected with the connecting piece, the connecting piece is embedded setting with the heating cylinder.

Preferably, the heating cylinder inner side wall is uniformly and fixedly connected with a plurality of connecting columns, the connecting columns penetrate through the sealing outer cylinder, and the connecting columns are far away from the heating cylinder end and are fixedly connected with the sealing inner cylinder.

Preferably, the sealing inner cylinder is made of 38CrMoAl round steel, and the inner wall of the sealing inner cylinder is smooth.

The working principle is as follows: the device is characterized in that the device is connected through a plurality of connecting discs and a plurality of sealing outer cylinders to form a thick oil well main body, the top and the bottom of the thick oil well are connected with end discs to form a thick oil well whole body, the sealing inner cylinder is made of 38CrMoAl round steel, the inner wall of the sealing inner cylinder is smooth, the wax deposition of the sealing inner cylinder is reduced, the heating is carried out through an internal heating pipe, heat energy is transferred to the sealing inner cylinder, the wax deposition phenomenon of the sealing inner cylinder caused by low temperature is prevented, a gap is formed between the sealing outer cylinder and the sealing inner cylinder and used for injecting water resource, the heat capacity of water is larger than that of oil, the reduction of liquid flow temperature can be reduced, in addition, due to the increase of water content, a continuous water film; if more serious wax deposition occurs, hot water is injected for heating treatment, so that the production stop of an oil well is prevented.

(III) advantageous effects

The invention provides novel agent-injecting and wax-proofing equipment for a heavy oil well. The method has the following beneficial effects:

1. the invention provides novel anti-waxing equipment for an injection agent for a heavy oil well, which is characterized in that a plurality of connecting discs and a plurality of sealing outer cylinders are connected to form a heavy oil well main body, the top and the bottom of the heavy oil well are connected with end discs to form a whole heavy oil well, the anti-waxing equipment is simple in structure, a sealing inner cylinder is made of 38CrMoAl round steel, the inner wall is smooth, and the waxing of the sealing inner cylinder is reduced.

2. The invention provides novel wax deposition prevention equipment for an injection agent for a heavy oil well, which is provided with a heating cylinder, wherein the heating cylinder is used for heating through an internal heating pipe and transmitting heat energy to a sealing inner cylinder, so that the wax deposition phenomenon of the sealing inner cylinder caused by low temperature of the device is prevented.

3. The invention provides a novel anti-waxing device for an injection agent for a heavy oil well, wherein a gap is arranged between a sealing outer cylinder and a sealing inner cylinder and used for injecting water resources, the heat capacity of water is greater than that of oil, the reduction of the liquid flow temperature can be reduced, and in addition, due to the increase of the water content, a continuous water film is easily formed on the wall of an oil pipe, so that paraffin cannot be deposited on the pipe wall, and the waxing degree is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a novel wax precipitation prevention device for an agent injection for a heavy oil well, provided by the invention;

FIG. 2 is a schematic structural view of the end disk of FIG. 1;

FIG. 3 is a schematic three-dimensional structure of FIG. 2;

FIG. 4 is a schematic structural diagram of the connecting disc in FIG. 1;

FIG. 5 is a schematic three-dimensional structure of FIG. 4;

FIG. 6 is a schematic structural view of the heat block of FIG. 1;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a schematic structural diagram of the heating pipe in FIG. 1;

fig. 9 is a schematic structural view of the connector.

Wherein, 1, the outer cylinder is sealed; 11. a first thread groove; 12. mounting grooves; 2. an end plate; 21. a first externally threaded ring; 22. a first connection hole; 3. a connecting disc; 31. a second externally threaded ring; 32. a third externally threaded ring; 33. a second connection hole; 4. a heating cylinder; 41. mounting holes; 42. heating a tube; 43. a connecting member; 44. connecting columns; 45. and (5) sealing the inner cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 9, an embodiment of the present invention provides a novel wax-proofing device for an agent injection for a heavy oil well, including a sealing outer cylinder 1, and characterized in that: the end face of the top of the sealing outer barrel 1 is provided with a first thread groove 11, the end disc 2 is arranged on the first thread groove 11 in a matched mode, the end, away from the first thread groove 11, of the sealing outer barrel 1 is provided with a mounting groove 12, a heating barrel 4 is arranged in the mounting groove 12, and the end face of the sealing outer barrel 1 is provided with a connecting disc 3 close to the mounting groove 12.

End disc 2 bottom terminal surface fixedly connected with first external screw thread ring 21, end disc 2 are located first external screw thread ring 21 terminal surface and run through and are provided with first through-hole, and end disc 2 terminal surface is located the first external screw thread ring 21 outside and evenly is provided with a plurality of first connecting holes 22, and first external screw thread ring 21 cooperatees with first thread groove 11 position, and first external screw thread ring 21 and 11 threaded connection of first thread groove.

The end face of the bottom of the connecting disc 3 is fixedly connected with a second external thread ring 31, the end face of the top of the connecting disc 3 is fixedly connected with a third external thread ring 32, the third external thread ring 32 is the same as the external diameter of the second external thread ring 31, the connecting disc 3 is located on the end face of the second external thread ring 31 and is provided with a second through hole in a penetrating mode, the end face of the connecting disc 3 is located on the outer side of the second external thread ring 31 and is evenly provided with a plurality of second connecting holes 33, the third external thread ring 32 is matched with the position of the mounting groove 12.

The end face of the heating cylinder 4 is uniformly provided with a plurality of mounting holes 41, the mounting holes 41 are arranged in an embedded manner, the mounting holes 41 are provided with heating pipes 42 in a matched manner, the heating pipes 42 are slidably connected with the mounting holes 41, a fixing ring on the end face of the heating pipes 42 is connected with a connecting piece 43, and the connecting piece 43 and the heating cylinder 4 are arranged in an embedded manner.

The sealing inner cylinder 45 is made of 38CrMoAl round steel, and the inner wall of the sealing inner cylinder is smooth.

Connect through a plurality of connection pads 3 and a plurality of sealed urceolus 1, form the viscous crude well main part, and be connected with end plate 2 at viscous crude well top and bottom, it forms the viscous crude well wholly, its simple structure, sealed inner tube 45 adopts 38CrMoAl round steel, the inner wall is smooth, reduce sealed inner tube 45 waxing phenomenon, be provided with cartridge heater 4 in the mounting groove 12 in sealed urceolus 1 simultaneously, heat through the inside heating pipe 42 of cartridge heater 4, and give sealed inner tube 45 with heat energy transfer, the preventing means causes the waxing phenomenon that sealed inner tube 45 appears because of low temperature.

Example two:

a plurality of connecting columns 44 are uniformly and fixedly connected to the inner side wall of the heating cylinder 4, the connecting columns 44 penetrate through the sealing outer cylinder 1, and the sealing inner cylinder 45 is fixedly connected to the connecting columns 44 far away from the heating cylinder 4; a gap is arranged between the sealing outer cylinder 1 and the sealing inner cylinder 45 and is used for injecting water resources, the heat capacity of water is greater than that of oil, the reduction of the liquid flow temperature can be reduced, and in addition, due to the increase of the water content, a continuous water film is easily formed on the wall of an oil pipe, so that paraffin cannot be deposited on the pipe wall, and the paraffin precipitation degree is reduced to a certain extent; if more serious wax deposition occurs, hot water is injected for heating treatment, so that the production stop of an oil well is prevented.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.