CN211819312U

CN211819312U - Antifouling device at top of workover treatment lifting and plugging pipe

Info

Publication number: CN211819312U
Application number: CN202020172732.XU
Authority: CN
Inventors: 白瑞义; 刘兴山; 张永坤; 李洪波; 李栋; 李国栋; 王凯; 王新强; 王涛; 房孝波; 郭东乐; 杨成
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co
Priority date: 2020-02-16
Filing date: 2020-02-16
Publication date: 2020-10-30
Anticipated expiration: 2030-02-16

Abstract

The lower end of a liquid collecting barrel (1) of an antifouling device at the top of a lifting and plugging pipe for workover operation is in threaded connection with the upper end of a conical expansion body (2) through an upper connecting hole (Z I), the conical expansion body (2) is inserted into a central hole for bearing a fixing body (3), an external hanging pin (201) is inserted into a hanging groove (G) for bearing the fixing body (3), clockwise rotation hanging is performed, a positioning screw (301) for bearing the fixing body (3) clockwise rotates to enter a limiting track (202) of the conical expansion body (2), a sealing ring (4) is sleeved on an expansion butt joint body (5), the expansion butt joint body (5) is in threaded connection with a lower connecting hole (Z III), and the conical expansion body (2) is used for expanding a butt joint body (5) and a butt joint tooth piece (501). The utility model is suitable for an oil, water, gas well carry stifled pipe operation, have stopped near the pollution of well head when carrying stifled pipe, improve operational environment, avoid the unexpected slip of operating personnel to tumble the hidden danger, have improved work efficiency, shorten the oil well operation and account for the well time, increase crude oil output.

Description

Antifouling device at top of workover treatment lifting and plugging pipe

Technical Field

The utility model relates to an anti-pollution technique of oil field oil, well operation well head is an antifouling device in workover treatment stifled pipe top of carrying particularly.

Background

At present, the depths of various production wells of oil fields are more than one thousand or even thousands of meters, and the wells are filled with formation fluid or workover fluid. After the oil pipe is put into the workover treatment, the annular space outside the oil pipe and the space inside the oil pipe form a U-shaped pipe communicating vessel, so that the inner cavity of the oil pipe can be filled with liquid. In the process of lifting the oil pipe, liquid in the inner cavity of the oil pipe can be continuously discharged from the bottommost part of the pipe column into the shaft, so that the pipe column cannot cause environmental pollution under normal conditions. The inner cavity of the pipe column is blocked under the influence of factors such as stratum sand return, underground foreign matters, failure of a well descending tool and the like, liquid in the inner cavity of the oil pipe cannot be discharged and is taken out of a shaft along with the lifted oil pipe in the process of lifting the pipe column, and the well repairing operation is called 'pipe blockage lifting' operation. When the plugging pipe is lifted, liquid in the plugging pipe overflows and spills from the top of the pipe column, when each oil pipe is disconnected with a connecting screw thread, 30-50 liters of unequal liquid is sprayed around a wellhead, often one hundred or even hundreds of single pipes exist in the pipe column when the well is lowered, and several cubes of liquid in the well can be spilled when the plugging pipe is lifted once. Not only pollutes the environment, prolongs the operation and accounts for the well time, but also causes the muddy surrounding of the well mouth and has the hidden danger of accidental slipping and falling injury of operating personnel. When a single plugging pipe is lifted, well liquid overflowing due to the influences of natural gas in an inner cavity of a pipe column, the speed difference of a winch of a workover rig and the like is scattered from the high altitude, a wellhead operator can be watered by oil water, if wind power is large, the scattered liquid can drift farther, and if hundreds of oil pipes of one well are completely lifted, a large amount of pollution can be caused near the wellhead. The traditional method has the modes of laying anti-seepage cloth at a well mouth, installing a plug at the top and the like, and has the disadvantages of temporary solution, no root cause and certain potential safety hazard. Therefore, in order to improve the working environment, prevent pollution near a wellhead and improve the operation timeliness, an antifouling device for the top of a workover plugging lifting pipe is developed.

Disclosure of Invention

The utility model aims at the aforesaid weak point, provide a workover carries stifled tub of top antifouling device.

The utility model aims at being realized by the following technical scheme:

the utility model discloses a: the device comprises a liquid collecting barrel, a conical extruding body, a bearing fixing body, a sealing ring and an expansion butt joint body; the method is characterized in that: the lower end of the liquid collecting barrel is in threaded connection with the upper end of the conical expansion body through the upper connecting hole, the conical expansion body is inserted into a center hole of the bearing fixing body, the external hanging pin is inserted into a hanging groove of the bearing fixing body and hung in a clockwise rotating mode, the positioning screw bearing the fixing body rotates clockwise to enter a limiting track of the conical expansion body, the sealing ring is sleeved on the expansion butt joint body, the expansion butt joint body is in threaded connection with the lower connecting hole, and the conical expansion body is used for expanding butt joint tooth sheets of the expansion butt joint body.

The liquid collecting barrel in the antifouling device at the top of the lifting and plugging pipe for workover treatment is a cylinder, the center of the bottom is provided with an upper connecting hole with threads, the top is provided with a central hole, a rotary rope hanging device is arranged in the central hole, and 2-4 exhaust holes are uniformly distributed outside the central hole.

The rotation type rope hanging device in the workover treatment plugging pipe top antifouling device is a combination of a cylinder and a square, the upper square is provided with a hanging hole, the lower part is a cylinder, and the bottom end of the cylinder is provided with an annular boss.

The conical expansion body in the antifouling device at the top of the workover treatment plugging pipe is a combination of a cylinder and a cone frustum, the upper part of the conical expansion body is provided with external threads matched with the upper connecting hole, the middle part of the conical expansion body is symmetrically provided with two hanging pins, the lower part of the conical expansion body is symmetrically provided with two limiting rails on the lower cylinder perpendicular to the hanging pins, the lower part of the conical expansion body is provided with a flow passing hole, and the flow passing hole is formed in the center of the conical expansion.

The bearing fixing body in the workover treatment plugging pipe top antifouling device is cylindrical, the center of the bearing fixing body is provided with a lower connecting hole with threads, the upper part of the bearing fixing body is symmetrically provided with two T-shaped hanging grooves, and the middle of the bearing fixing body perpendicular to the hanging grooves is symmetrically provided with two positioning screws.

Above-mentioned well workover is carried stifled pipe top antifouling device and is equipped with the expansion hole in the expansion butt joint body upper portion cylinder, the outside be equipped with lower connecting hole complex external screw thread, two arc butt joint teeth pieces are being articulated to the lower part symmetry.

According to the antifouling device for the top of the lifting and plugging pipe for workover operation, before the pipe is lifted and plugged, the liquid collecting barrel at the top is lifted manually and is aligned with the tubing coupling, the two butt-joint tooth sheets are in a natural folding state, and the outer diameter is smaller than the inner diameter of the tubing coupling; inserting the bottommost tooth sheet into the tubing coupling until the bottom of the sealing ring contacts the top of the tubing coupling; the liquid collecting barrel is pressed down by two hands, the conical extruding body is driven to move downwards, when the pressing lock pin enters the lowest part of the locking track groove, the conical part at the lower part of the conical extruding body contacts the inner walls of the two butt-joint tooth sheets, the two butt-joint tooth sheets are expanded outwards by the pressing extruding force of the conical part and are in butt-buckling fit with the internal thread of the oil pipe coupling; then the conical extruding body is rotated clockwise for 15 degrees, so that the hanging pin enters the hanging groove and the positioning screw is locked; and finally, fixing the tool on the hook by using a steel wire rope. When the plugging pipe is lifted, liquid in the oil pipe can only enter the liquid collecting barrel through the inner hole of the conical extruding body for temporary storage, and the liquid in the liquid collecting barrel is discharged immediately after the oil pipe is detached. After the oil pipe is plugged and lifted, the tool is pressed downwards and rotated for 15 degrees, the conical extrusion expansion body moves upwards when the liquid collecting barrel is pulled upwards, the external expansion force disappears, so that the butt joint tooth sheet is changed into a free state from a butt joint state, and the tooth thread is not matched with the internal thread of the oil pipe coupling any more; and the tool is completely withdrawn by pulling up continuously.

The utility model has the advantages that: the device is suitable for lifting and plugging pipes of oil, water and gas wells, avoids pollution near a well mouth when the plugging pipes are lifted, improves the working environment, avoids hidden danger of accidental slipping and falling injury of operators, improves the working efficiency, shortens the well occupying time of oil well operation, and increases the yield of crude oil.

Drawings

FIG. 1 is a schematic view of the axial side structure of the present invention

FIG. 2-the "explosion" diagram of the present invention

FIG. 3 is a schematic view of the main view of the liquid collecting tank 1 of the present invention

FIG. 4-the structure of the utility model is schematically shown in the field

In the figure, 1, a liquid collecting barrel, 101, a rotary rope hanging device; 2. a conical extruding body, 201, a hanging pin, 202, a limiting track; 3. a bearing fixed body 301, a positioning screw; 4. sealing ring, 5, expanding butt joint body, 501, butt joint tooth sheet; 6. an oil pipe; q, an exhaust hole, G, a hanging groove, Z I, an upper connecting hole, Z II, an overflowing hole, Z III, a lower connecting hole, Z IV, an expanding hole and X, a hanging hole.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 and 2, an antifouling device at the top of a lifting and plugging pipe for workover treatment consists of a liquid collecting barrel 1, a conical extrusion body 2, a bearing fixing body 3, a sealing ring 4 and an expansion butt body 5; the method is characterized in that: the lower end of the liquid collecting barrel 1 is in threaded connection with the upper end of the conical expansion body 2 through an upper connecting hole Z I, the conical expansion body 2 is inserted into a center hole of the bearing fixing body 3, the external hanging pin 201 is inserted into a hanging groove G of the bearing fixing body 3, the hanging pin is hung in a clockwise rotation mode, the positioning screw 301 which bears the fixing body 3 in a clockwise rotation mode enters a limiting track 202 of the conical expansion body 2, the sealing ring 4 is sleeved on the expansion butt joint body 5, the expansion butt joint body 5 is in threaded connection with the lower connecting hole Z III, and the conical expansion body 2 is used for expanding a butt joint tooth piece 501 of the expansion butt joint body 5.

As shown in fig. 3, the liquid collecting barrel 1 is a cylinder, an upper connecting hole Z i with threads is arranged in the center of the bottom, a central hole is arranged at the top, a rotary rope hanging device 101 is arranged in the central hole, and 4 exhaust holes Q are uniformly distributed outside the central hole.

The rope ware 101 is hung to rotation type is the combination of cylinder and square, and the upper portion square is equipped with hangs hole X, and the lower part is the cylinder, and the bottom of cylinder is equipped with annular boss.

The conical expansion body 2 is a combination of a cylinder and a cone frustum, the upper portion of the conical expansion body is provided with an external thread matched with the upper connecting hole Z I, the middle portion of the conical expansion body is provided with two hanging pins 201 in a sub-waist symmetrical mode, the lower portion of the conical expansion body is provided with two limiting rails 202 in a symmetrical mode, the lower portion of the conical expansion body is provided with the cone frustum, and the center of the conical expansion body is provided with an overflowing hole Z II.

The bearing fixing body 3 is cylindrical, a lower connecting hole Z III with threads is formed in the center of the bearing fixing body, two T-shaped hanging grooves G are symmetrically formed in the upper portion of the bearing fixing body, and two positioning screws 301 are symmetrically arranged in the middle perpendicular to the hanging grooves G.

An expansion hole Z IV is formed in the cylinder at the upper part of the expansion butt joint body 5, an external thread matched with the lower connecting hole Z III is arranged on the outer part of the expansion butt joint body, and two arc butt joint tooth sheets 501 are symmetrically hinged to the lower part of the expansion butt joint body.

A workover treatment carries the antifouling device of top of the stifled pipe, take the oil well operation as an example, at first, connect the internal thread of upper junction hole Z I of the bottom of the liquid collecting vessel 1 with the external thread of the upper portion of the toper and squeeze the body 2 and seal with fastener tape and anaerobic adhesive, the hanging hole X of the rotary rope hanger 101 fixes the wire rope of 6mm, play the protective action of dropping prevention; the sealing ring 4 is then sleeved into the outer wall of the expanded abutment 5 until the sealing ring contacts the top of the abutment teeth 501. Secondly, the external thread at the top of the expanding butt joint body 5 is connected with the internal thread of the bearing fixing body 3 and sealed by a thread belt and anaerobic adhesive, then the conical extruding body 2 is inserted into the bearing fixing body 3, the lower conical part of the conical extruding body 2 contacts the inner walls of the two butt joint tooth sheets 501, the two butt joint tooth sheets 501 are expanded outwards to be in butt joint fit with the coupling internal thread of the oil pipe 6, then the conical extruding body 2 is rotated 15 degrees clockwise, so that the hanging pin 201 enters the hanging groove G, and the positioning screw 301 is locked. Thirdly, when the plugging pipe is lifted up, liquid in the oil pipe enters the liquid collecting barrel 1 through the overflowing hole Z II of the conical extruding body 2 for temporary storage, and the liquid in the liquid collecting barrel is discharged immediately after the oil pipe 6 is detached. After the oil pipe is plugged and lifted, the tool is pressed downwards and rotates anticlockwise by 15 degrees, the conical extrusion expansion body 2 moves upwards by pulling up the liquid collecting barrel 1, the butt joint tooth sheet 501 is changed into a free state from a butt-joint state, the tooth thread is not matched with the coupling internal thread of the oil pipe 6 any more, and the butt joint tooth sheet 501 is completely withdrawn by pulling up continuously.

Through the oil well plugging pipe lifting operation, pollution near a wellhead is avoided when the plugging pipe is lifted, the working environment is improved, the hidden danger of accidental slipping and falling injury of operators is avoided, and the aims of improving the working efficiency, shortening the well occupying time of the oil well operation and increasing the crude oil yield are fulfilled.

Claims

1. A workover treatment carries stifled pipe top antifouling device includes: the device comprises a liquid collecting barrel (1), a conical extruding body (2), a bearing fixing body (3), a sealing ring (4) and an expansion butt joint body (5); the method is characterized in that: the lower end of the liquid collecting barrel (1) is in threaded connection with the upper end of the conical expansion body (2) through an upper connecting hole (Z I), the conical expansion body (2) is inserted into a central hole of the bearing fixing body (3), an external hanging pin (201) is inserted into a hanging groove (G) of the bearing fixing body (3), clockwise rotation hanging is carried out, a positioning screw (301) of the clockwise rotation bearing fixing body (3) enters a limiting track (202) of the conical expansion body (2), a sealing ring (4) is sleeved on the expansion butt joint body (5), the expansion butt joint body (5) is in threaded connection with a lower connecting hole (Z III), and the conical expansion body (2) is used for opening a butt joint tooth piece (501) of the expansion butt joint body (5).

2. The workover treatment pipe top antifouling device is characterized in that: the liquid collecting barrel (1) is a cylinder, an upper connecting hole (Z I) with threads is formed in the center of the bottom of the liquid collecting barrel, a central hole is formed in the top of the liquid collecting barrel, a rotary rope hanging device (101) is arranged in the central hole, and 2-4 exhaust holes (Q) are uniformly distributed outside the central hole.

3. The workover treatment pipe top antifouling device is characterized in that: the rotary rope hanging device (101) is a combination of a cylinder and a cube, a hanging hole (X) is formed in the upper cube, a cylinder is arranged at the lower portion of the upper cube, and an annular boss is arranged at the bottom end of the cylinder.

4. The workover treatment pipe top antifouling device is characterized in that: the cone-shaped extruding and expanding body (2) is a combination of a cylinder and a cone frustum, the upper portion of the cone-shaped extruding and expanding body is provided with an external thread matched with the upper connecting hole (Z I), the middle portion of the cone-shaped extruding and expanding body is provided with two hanging pins (201) in a sub-waist symmetrical mode, the lower portion of the cone-shaped extruding and expanding body is provided with two limiting rails (202) in a symmetrical mode on the lower portion of the cylinder perpendicular to the hanging pins (201), the lower portion of the.

5. The workover treatment pipe top antifouling device is characterized in that: the bearing fixing body (3) is cylindrical, a lower connecting hole (Z III) with threads is formed in the center of the bearing fixing body, two T-shaped hanging grooves (G) are symmetrically formed in the upper portion of the bearing fixing body, and two positioning screws (301) are symmetrically arranged in the middle of the middle perpendicular to the hanging grooves (G).

6. The workover treatment pipe top antifouling device is characterized in that: an expansion hole (ZIV) is formed in the cylinder at the upper part of the expansion butt joint body (5), an external thread matched with the lower connecting hole (ZIII) is arranged on the outer part of the expansion butt joint body, and two arc butt joint tooth sheets (501) are symmetrically hinged to the lower part of the expansion butt joint body.