CN215761593U - Leakage control device for wellhead - Google Patents
Leakage control device for wellhead Download PDFInfo
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- CN215761593U CN215761593U CN202121989509.5U CN202121989509U CN215761593U CN 215761593 U CN215761593 U CN 215761593U CN 202121989509 U CN202121989509 U CN 202121989509U CN 215761593 U CN215761593 U CN 215761593U
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- hanger
- flange
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- 238000003825 pressing Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000003780 insertion Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims abstract description 22
- 238000012856 packing Methods 0.000 claims abstract description 17
- 239000000725 suspension Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000002627 tracheal intubation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a wellhead device for an oil-water well in an oil field, in particular to a wellhead leakage treatment device. The device comprises a pressing joint, a piston cylinder, a piston, a sealing ring, a baffle, a piston groove, a one-way sliding ring, a screw thread head, an insertion pipe reverse-thread joint, a hanger, a flange, a packing, a pressing cap, a jackscrew, a four-way joint and a hanging short joint. By adopting the device, the leakage control time of the wellhead can be shortened, the overflow discharge of the wellhead is reduced, the treatment cost of the well fluid returning out is saved, the formation pressure is maintained, the energy conservation and emission reduction are realized, and the environment is protected. By adopting the device, the maintenance of the wellhead for replacing the valve and the components can be ensured under the condition of no pressure in the wellhead, and the service life of each component of the wellhead can be prolonged.
Description
Technical Field
The utility model relates to a wellhead device for an oil-water well in an oil field, in particular to a wellhead leakage treatment device.
Background
The traditional large four-way main body of the oil extraction well head is manufactured into a whole in a casting mode, and because the defects of sand inclusion, air holes, loose materials and the like of a casting are easy to occur during casting operation, the yield of products is reduced, the quality of the products is influenced, and especially because the material density is low and the pressure bearing capacity is poor, the technical fault of fracturing is easy to occur during production operation, the workload and the production cost of maintenance operation are increased, and the oil extraction amount is influenced.
The hanger of the oil-water well is often blocked on the four-way joint of the well head and cannot be pulled out due to the reasons of corrosion, scaling, long-term non-operation and the like in the production process. The traditional method is that the four-way joint is manually dismantled by an operation item part to replace a wellhead so as to realize normal construction operation, and the dismantled wellhead cannot be wholly scrapped because of the fact that a hanger cannot be taken out. The construction wastes time and energy, increases the well repair cost, and has great well control, environmental protection and safety risks.
At present, wellhead leakage becomes the key point of field control due to long-term service and repeated operation of the wellhead of the oil-water well. The water injection pressure of the water-drive reservoir rises continuously, particularly the water injection pressure of the low-permeability reservoir is higher, the problem of leakage at the wellhead of a water injection well is increasingly prominent, the pressure release time of the water injection stopping of some wells is more than 4 months, the injected water returns out, and the cost for treating the returned liquid is increased. After the water injection well stops injecting, the residual pressure still exists, the pressure can be released for a long time, the injection amount of the hypotonic well is increased, and the idle water injection is realized. The leakage exists above the four-way upper flange, the operation of stopping injection for a long time and the leakage control are also needed, the time and the labor are wasted, and the quality benefit of water injection development is seriously influenced. The main leakage is manifested in three ways: firstly, leakage of a valve, a clamp connection part, a small cross joint and the like at the part above a cross flange is mainly caused by long-term corrosion and scaling; secondly, the four-way hanger flange leaks mainly because of the leakage caused by the loose in place, the puncture of a sealing steel ring and the squeezing and holding pressure of a well washing test; and thirdly, the four-way jackscrew leaks due to the fact that the four-way jackscrew is not fastened in place, screw threads are corroded, a sealing ring is aged and damaged, a jackscrew rod is bent and the like.
The chinese utility model patent CN207863906U discloses a step inserted metal seal mandrel formula hanger, this hanger goes up the flange and passes through bolted connection lower part sleeve pipe cross, the hanger body passes through female connection sleeve, this external suit of hanger is by suspension screw, the upper portion metal seal that toper metal sealing ring and jackscrew are constituteed, the step facing machine of dabber and cross has the annular tooth, the inserted tooth formula step is with the sealed backing ring of annular tooth embedding under the effect of sleeve pipe cluster weight, realize lower part metal seal, arouse the toper metal sealing ring through suspension screw and warp, make two conical surfaces produce interference fit, realize that toper metal is sealed, the annular space between deformable body seal sleeve pipe and the cross. The hanger mainly solves the problem of sealing failure caused by rubber sealing aging or corrosion medium erosion in a high-temperature high-pressure gas well.
Chinese utility model patent CN2737933 discloses a multifunctional polish rod secondary packing box, which comprises a main body which is penetrated on a polish rod and can move up and down relative to the polish rod, and the lower end of the main body is provided with a packing box joint, a plunger return spring is sleeved on the polish rod in the main body, a packing plunger support is arranged at the upper end of the plunger return spring, a packing is filled in an annular space formed by the main body, the polish rod and the packing plunger support, and a gland is arranged at the upper part of the packing; a plunger pressing block is fixed on the polish rod above the main body; the main body is provided with a single-flow valve type oil outlet and an oil inlet. The utility model can lubricate the polish rod, prevent oil gas and water leakage at the well mouth, realize clean production, and has the functions of adding medicine into the oil well casing, sucking oil gas in the casing, recovering, sampling and emptying dead oil, controlling leakage by negative pressure of the reduction gearbox of the oil pumping unit, recovering leaked oil of the packing, recovering filtered oil and water and the like.
Disclosure of Invention
The utility model mainly aims to provide a wellhead leakage control device which can shorten the wellhead leakage control time and effectively prevent and control the leakage of wellhead parts above a wellhead four-way jackscrew and a four-way upper flange.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a wellhead leakage control device which comprises a pressing joint, a piston cylinder, a piston, a sealing ring, a baffle plate, a piston groove, a one-way sliding ring, a screw thread head, an insertion pipe reverse-buckling joint, a hanger, a flange, a packing, a pressing cap, a jackscrew, a four-way joint and a hanging short section; the pressing joint is arranged at the top end of the piston cylinder, the piston is arranged in the piston cylinder, and a first sealing ring is arranged between the piston and the piston cylinder for sealing; the lower end of the piston cylinder is connected with the screw thread head through a one-way slip ring; the lower part of the piston is provided with an insertion pipe, and the lower part of the insertion pipe is provided with an insertion pipe back-off joint; the piston cylinder is provided with a piston groove, the baffle is inserted in the piston groove, and the rotating piston cylinder and the baffle inserted in the piston groove drive the screw head, the insertion pipe and the insertion pipe left-hand thread joint to rotate; the hanger is arranged in a four-way joint, and an upper flange and a lower flange are arranged on the four-way joint; the jackscrew is connected with the hanger through an upper flange, the packing and the pressing cap are fixed on the jackscrew, and the pressing cap is in threaded connection with the flange; the top end of the jackscrew is provided with threads and is in threaded connection with the inner hole of the upper flange; the suspension short joint is in threaded connection with the hanger, and the lower flange is in flange connection with the casing pipe short joint to form a sealed well mouth.
Furthermore, the wellhead leakage control device also comprises a variable joint, and the lower part of the intubating pipe reverse buckling connector is in threaded connection with the variable joint.
Further, a hanger pressing groove is formed in the middle of the hanger.
Furthermore, sealing rings are respectively arranged at the upper part and the lower part of the hanger pressing groove part.
Furthermore, the jackscrew penetrates through the flange side hole and is pressed in the hanger pressing groove.
Compared with the prior art, the utility model has the following advantages:
by adopting the device, the leakage control time of the wellhead can be shortened, the overflow discharge of the wellhead is reduced, the treatment cost of the well fluid returning out is saved, the formation pressure is maintained, the energy conservation and emission reduction are realized, and the environment is protected. By adopting the device, the maintenance of the wellhead for replacing the valve and the components can be ensured under the condition of no pressure in the wellhead, and the service life of each component of the wellhead can be prolonged.
The device can isolate the jackscrew and the packing from liquid in the well, thereby preventing the jackscrew from rusting and the packing from leaking; the hanger is additionally provided with a variable joint which is connected with the inserting pipe reverse-thread connector screw thread, so that each part of the well head is isolated from liquid in the well, the well hydraulic pressure in the well head is released, and each part of the well head is prevented from leaking.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to embodiment 1 of the present invention.
1. The hydraulic pipe comprises a pressurizing joint, a piston cylinder 2, a piston 3, a first sealing ring 4, a baffle 5, a piston groove 6, a one-way sliding ring 7, a screw head 8, an insertion pipe 9, an insertion pipe reverse-buckling joint 10, a change joint 11, a hanger 12, a second sealing ring 13, an upper flange 14, a packing 15, a pressing cap 16, a jackscrew 17, a hanger pressing groove 18, a third sealing ring 19, a cross joint 20, a lower flange 21 and a hanging short section 22.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
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 exemplary embodiments according to the utility model. 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 the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
As shown in fig. 1, the wellhead leakage control device comprises a pressing joint 1, a piston cylinder 2, a piston 3, a first sealing ring 4, a baffle 5, a piston groove 6, a one-way slip ring 7, a screw thread head 8, an insertion pipe 9, an insertion pipe reverse-buckling joint 10, a variable joint 11, a hanger 12, a second sealing ring 13, an upper flange 14, a packing 15, a pressing cap 16, a jackscrew 17, a hanger pressing groove 18, a third sealing ring 19, a four-way joint 20, a lower flange 21 and a hanging short joint 22.
The pressing joint 1 is arranged at the top end of the piston cylinder 2, the piston 3 is arranged in the piston cylinder 2, and a first sealing ring 4 is arranged between the piston 3 and the piston cylinder 2 for sealing; the lower end of the piston cylinder 2 is connected with a screw head 8 through a one-way slip ring 7; the lower part of the piston 3 is provided with an insertion pipe 9, and the lower part of the insertion pipe 9 is provided with an insertion pipe back-off joint 10; a piston groove 6 is arranged on the piston cylinder 2, and the baffle 5 is inserted in the piston groove 6; the rotary piston cylinder 2 and the baffle 5 inserted in the piston groove 6 drive the screw head 8, the insertion pipe 9 and the insertion pipe reverse buckle joint 10 to rotate; the lower part of the intubation tube left-hand thread joint 10 is connected with a variable joint 11 in a threaded manner. When in use, the screw head 8 is connected with a test valve at the upper part of a well mouth for sealing; the inserting pipe 9 and the inserting pipe reverse-buckling joint 10 penetrate through a testing valve, a small four-way valve, a main valve and a flange cover of a well mouth and are in threaded connection with a variable joint 11. The piston cylinder 2 is rotated clockwise to drive the intubation tube reverse buckling joint 10 to be firmly connected with the variable joint 11, and the thread is sealed. After sealing, the well head emptying valve is opened to release pressure, and when the well head emptying valve is released to have no pressure and no overflow, the well head leakage can be treated by replacing the valve and overhauling components.
The hanger 12 is provided with a hanger hold down groove 18 having a second seal 13 thereon and a second seal 19 thereunder. The hanger 12 is seated in the cross 20; the four-way joint 20 is provided with an upper flange 14 and a lower flange 21. The jackscrew 17 penetrates through a side hole of the upper flange 14 and is jacked in the hanger pressing groove 18, so that the hanger 12 is tightly pressed in the four-way joint 20, and the second sealing ring 13 and the third sealing ring 19 seal the oil jacket annular space on the inner wall of the four-way joint 20; the packing 15 and the pressing cap 16 are fixed on the jackscrew 17, and the top end of the jackscrew 17 is provided with threads and is in threaded connection with the hole of the upper flange 14; the pressing cap 16 is in threaded connection with the outside of the side hole of the upper flange 14. When in use, the pressing cap 16 presses the coil root 15, so that the inner wall of the side hole of the upper flange 14 is in threaded connection and sealing with the top end of the jackscrew 17. When in use, the top thread 17 of the four-way valve 20 can be effectively prevented from leaking by tightening the top thread 17 and the pressing cap 16.
The suspension short joint 22 is in threaded connection with the hanger 12, and the other end of the four-way joint 20 is connected with the lower flange 21. When in use, the hanging short pipe 22 is connected with a lower hanging pipe column, and the lower flange 21 is connected with a casing pipe short section flange to form a sealed well mouth.
All parts and parts which are not discussed in the utility model and the connection mode of all parts and parts in the application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (5)
1. A wellhead leakage control device is characterized by comprising a pressing joint, a piston cylinder, a piston, a sealing ring, a baffle plate, a piston groove, a one-way sliding ring, a screw thread head, an insertion pipe reverse-buckling joint, a hanger, a flange, a packing, a pressing cap, a jackscrew, a four-way joint and a hanging short section;
the pressing joint is arranged at the top end of the piston cylinder, the piston is arranged in the piston cylinder, and a first sealing ring is arranged between the piston and the piston cylinder for sealing; the lower end of the piston cylinder is connected with the screw thread head through a one-way slip ring; the lower part of the piston cylinder is provided with an insertion pipe, and the lower part of the insertion pipe is provided with an insertion pipe back-off joint; the piston cylinder is provided with a piston groove, the baffle is inserted in the piston groove, and the rotating piston cylinder and the baffle inserted in the piston groove drive the screw head, the insertion pipe and the insertion pipe left-hand thread joint to rotate;
the hanger is arranged in a four-way joint, and an upper flange and a lower flange are arranged on the four-way joint; the jackscrew is connected with the hanger through an upper flange, the packing and the pressing cap are fixed on the jackscrew, and the pressing cap is in threaded connection with the flange; the top end of the jackscrew is provided with threads and is in threaded connection with the inner hole of the upper flange; the suspension short joint is in threaded connection with the hanger, and the lower flange is in flange connection with the casing pipe short joint to form a sealed well mouth.
2. The wellhead leak control device according to claim 1, further comprising a variable joint, wherein the lower portion of the cannula left-hand thread is in threaded connection with the variable joint.
3. A wellhead leak control device according to claim 1, wherein the hanger has a hanger hold-down groove provided in the middle thereof.
4. A wellhead leakage control device according to claim 3, wherein seal rings are mounted on the upper and lower portions of the hanger hold-down groove, respectively.
5. The wellhead leakage control device according to claim 3, wherein the jackscrew penetrates from the flange side hole and is pressed against the hanger hold-down groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989509.5U CN215761593U (en) | 2021-08-23 | 2021-08-23 | Leakage control device for wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989509.5U CN215761593U (en) | 2021-08-23 | 2021-08-23 | Leakage control device for wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215761593U true CN215761593U (en) | 2022-02-08 |
Family
ID=80077799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121989509.5U Active CN215761593U (en) | 2021-08-23 | 2021-08-23 | Leakage control device for wellhead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215761593U (en) |
-
2021
- 2021-08-23 CN CN202121989509.5U patent/CN215761593U/en active Active
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