CN215949418U - Christmas tree oil pipe suspension structure and wellhead device - Google Patents
Christmas tree oil pipe suspension structure and wellhead device Download PDFInfo
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- CN215949418U CN215949418U CN202122557394.9U CN202122557394U CN215949418U CN 215949418 U CN215949418 U CN 215949418U CN 202122557394 U CN202122557394 U CN 202122557394U CN 215949418 U CN215949418 U CN 215949418U
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Abstract
The utility model provides a hanging structure of an oil pipe of a Christmas tree and a wellhead device, and belongs to the field of oil and gas exploitation equipment. The Christmas tree oil pipe suspension structure comprises a Christmas tree main pipe, a fixed ring seat, a slip, a locking ring and an elastic traction unit. An inner ring groove is formed in the inner wall of the main pipe of the Christmas tree; the fixed ring seat is arranged in the inner ring groove, and the inner peripheral surface of the fixed ring seat is an inverted conical surface; the slips are arranged in the fixed ring seat and used for tightly holding the oil pipe, and the outer peripheral surface of the slips is an inverted conical surface and is matched with the inner peripheral surface of the fixed ring seat; the locking ring is propped against one end of the slip, which is far away from the fixed ring seat; the elastic traction unit is arranged between the locking ring and the Christmas tree main pipe and is suitable for drawing the locking ring to push the slips into the same fixed ring seat. The wellhead device comprises the Christmas tree oil pipe suspension structure. The elastic traction unit pulls the locking ring to push the slips into the fixed ring seat, so that the slips lock the oil pipe; the elastic traction unit can press the slips in the fixed ring seat all the time through the locking ring, so that the slips are guaranteed to hold the oil pipe all the time, and the oil pipe is prevented from sinking.
Description
Technical Field
The utility model belongs to the technical field of oil and gas exploitation equipment, and particularly relates to a hanging structure of an oil pipe of a Christmas tree and a wellhead device.
Background
A tubing hanger is a device installed in a christmas tree for hanging tubing. A traditional slip type oil pipe hanger mainly comprises slips and a fixed ring seat. The slips are annular, and the fixed ring seat is also annularly sleeved outside the slips. The outer peripheral surface of the slip and the inner peripheral surface of the fixed ring seat are inverted conical surfaces and are attached to each other, after the oil pipe is inserted into the annular sleeve, the oil pipe and the annular sleeve sink under the gravity, and the annular sleeve is tightly pressed on the oil pipe by the conical inner peripheral surface of the fixed ring seat at the moment, so that the oil pipe is locked by the slips, and the oil pipe is prevented from further sinking.
However, in the oil and gas drilling operation, the oil pipe can generate axial movement after being subjected to the combined action of various forces, so that the slips are easily loosened, the oil pipe sinks, and the normal operation of an oil well is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a Christmas tree oil pipe suspension structure and a wellhead device, and aims to solve the technical problem that slips are easy to loosen due to axial movement of an oil pipe in the prior art.
In order to achieve the above object, the present invention adopts a technical solution that provides a Christmas tree oil pipe suspension structure, comprising:
the inner wall of the main pipe of the Christmas tree is provided with an inner ring groove;
the fixed ring seat is arranged in the inner ring groove, and the inner peripheral surface of the fixed ring seat is an inverted conical surface;
the slips are arranged in the fixed ring seat and used for tightly holding the oil pipe, and the outer peripheral surface of the slips is an inverted conical surface and is matched with the inner peripheral surface of the fixed ring seat;
the locking ring is abutted against one end, far away from the fixed ring seat, of the slip; and
and the elastic traction unit is arranged between the locking ring and the Christmas tree main pipe and is suitable for traction the locking ring so as to push the slips into the fixed ring seat.
As another embodiment of the present application, the locking ring is provided with a perforation, and the elastic pulling unit includes:
the elastic component is arranged on the side wall of the main pipe of the Christmas tree and provides elastic force along the axial direction of the fixed ring seat; and
and the connecting piece penetrates through the through hole, one end of the connecting piece is limited by the locking ring, and the other end of the connecting piece is detachably connected with the elastic assembly.
As another embodiment of the application, the side wall of the main pipe of the Christmas tree is provided with a mounting groove; the elastic assembly includes:
the spiral spring is arranged in the mounting groove, is arranged along the axial direction of the fixed ring seat, and is limited by the inner wall of the mounting groove at one end close to the locking ring; and
the sliding block is arranged in the mounting groove in an axial sliding mode along the fixed ring seat and abuts against one end, far away from the locking ring, of the spiral spring;
the connecting piece passes through the inner hole of the spiral spring and is detachably connected with the sliding block.
As another embodiment of the present application, one end of the mounting groove, which is far away from the locking ring, is provided with a guide hole along the axial direction of the fixed ring seat, and the sliding block is provided with a guide rod in sliding fit with the guide hole.
As another embodiment of the present application, the inner ring groove includes:
a main cavity section accommodating the stationary ring seat; and
the containing section is used for containing the locking ring, the inner diameter of the containing section is larger than that of the main cavity section, and a step part is formed at the joint of the containing section and the main cavity section;
the mounting groove and the elastic component are arranged on the step part, the locking ring is positioned in the accommodating section, and the through hole is opposite to the elastic component in the axial direction of the fixed ring seat.
As another embodiment of the present application, the mounting groove is open at one end thereof adjacent to the locking ring and adapted to receive the coil spring and the slider; a detachable pressing sleeve is arranged on the end face of the step part, and the pressing sleeve blocks one end, close to the locking ring, of the mounting groove;
after the spiral spring and the sliding block are rotated into the mounting groove, one end, close to the locking ring, of the spiral spring is limited by the pressing sleeve, and the connecting piece penetrates through the pressing sleeve.
As another embodiment of the application, the inner ring of the locking ring is provided with an inner sealing strip for sealing with the oil pipe.
As another embodiment of the present application, the inner ring of the locking ring is provided with an inner sealing groove, and the inner sealing groove has openings on an inner circumferential surface of the locking ring and an end surface facing the slip, respectively; the inner sealing strip is arranged in the inner sealing groove, the inner periphery of the inner sealing strip is sealed with the oil pipe, and one side of the slip faces the slip and is sealed with the slip.
As another embodiment of the present application, an outer circumference of the fixed ring seat is sealed with an inner circumferential wall of the inner ring groove by an outer seal strip.
The beneficial effects of the Christmas tree oil pipe suspension structure provided by the embodiment of the utility model are as follows: compared with the prior art, in the Christmas tree oil pipe suspension structure provided by the embodiment of the utility model, after the oil pipe is inserted into the slips, the elastic traction unit pulls the locking ring to push the slips into the fixed ring seat, and the slips lock the oil pipe through the matching of the inverted conical surface on the outer periphery of the slips and the inverted conical surface on the inner periphery of the fixed ring seat; when the oil pipe moves axially, the elastic traction unit can press the slips in the fixed ring seat all the time through the locking ring, so that the slips are prevented from being loosened, the slips are guaranteed to hold the oil pipe all the time, and the oil pipe is prevented from sinking.
Another technical solution adopted by the present invention is to provide a wellhead assembly, comprising: the Christmas tree tubing suspension of any preceding claim.
The wellhead device provided by the embodiment of the utility model has the beneficial effects that: compared with the prior art, according to the wellhead device provided by the embodiment of the utility model, by adopting any one of the Christmas tree oil pipe suspension structures, after the oil pipe is inserted into the slips, the elastic traction unit pulls the locking ring to push the slips into the fixed ring seat, and the slips lock the oil pipe through the matching of the inverted conical surface on the outer periphery of the slips and the inverted conical surface on the inner periphery of the fixed ring seat; when the oil pipe moves axially, the elastic traction unit can press the slips in the fixed ring seat all the time through the locking ring, so that the slips are prevented from being loosened, the slips are guaranteed to hold the oil pipe all the time, and the oil pipe is prevented from sinking.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a cross-sectional view of a Christmas tree tubing suspension provided by an embodiment of the present invention;
fig. 2 is a cross-sectional view of the main tube of the tree of fig. 1.
Wherein, in the figures, the respective reference numerals:
1-Christmas tree main pipe; 11-inner ring groove; 111-a main cavity section; 112-a containment section; 113-a step portion; 114-a compression sleeve; 12-mounting grooves; 13-a pilot hole; 2-fixing the ring seat; 21-outer sealing strip; 3-slips; 4-locking ring; 41-perforating; 42-inner seal groove; 43-inner sealing strip; 5-an elastic pulling unit; 51-a resilient component; 511-coil spring; 512-a slider; 513-guide rods; 52-a connector; 6-oil pipe.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and fig. 2 together, a description will now be given of a christmas tree tubing suspension structure according to an embodiment of the present invention. A christmas tree tubing suspension structure comprising:
the inner wall of the main pipe 1 of the Christmas tree is provided with an inner annular groove 11;
the fixed ring seat 2 is arranged in the inner ring groove 11, and the inner circumferential surface of the fixed ring seat is an inverted conical surface;
the slips 3 are arranged in the fixed ring seat 2 and used for tightly holding the oil pipe 6, and the outer peripheral surface of the slips is an inverted conical surface and matched with the inner peripheral surface of the fixed ring seat 2;
the locking ring 4 is abutted against one end of the slip 3, which is far away from the fixed ring seat 2; and
and an elastic pulling unit 5, which is arranged between the locking ring 4 and the christmas tree main pipe 1, and is adapted to pull the locking ring 4 to push the slips 3 into the fixed ring seat 2.
In this embodiment, the slips 3 are annular and have a gap so that the slips 3 can be retracted. The fixed ring seat 2 is annular and is sleeved outside the slips 3, and the inverted conical surface on the outer periphery of the slips 3 is attached to the inverted conical surface on the inner periphery of the fixed ring seat 2; an annular inner ring groove 11 is processed on the inner wall of the upper end of the main pipe 1 of the Christmas tree, and the assembled slips 3 and the fixed ring seat 2 are placed in the inner ring groove 11. The locking ring 4 is pressed above the slips 3, the upper end of the elastic traction unit 5 is connected with the locking ring 4, and the lower end of the elastic traction unit is connected with the side wall of the Christmas tree main pipe 1. After the oil pipe 6 is inserted into the annular sleeve, the elastic traction unit 5 draws the locking ring 4 downwards, the slips 3 are pressed into the fixed ring seat 2 downwards, and the slips 3 are contracted to lock the oil pipe 6 through the matching of the reverse taper surfaces on the outer periphery of the slips 3 and the reverse taper surfaces on the inner periphery of the fixed ring seat 2.
Referring to fig. 1, as an embodiment of the christmas tree tubing suspension structure provided in the present invention, the locking ring 4 is provided with a through hole 41, and the elastic traction unit 5 comprises:
the elastic component 51 is arranged on the side wall of the main pipe 1 of the Christmas tree and provides elastic force along the axial direction of the fixed ring seat 2; and
the connecting piece 52 penetrates through the through hole 41, one end of the connecting piece is limited with the locking ring 4, and the other end of the connecting piece is detachably connected with the elastic assembly 51.
In the embodiment, after the sleeve is inserted into the annular sleeve, the connecting piece 52 penetrates through the through hole 41 of the locking ring 4, one end of the connecting piece is limited with the locking ring 4, the other end of the connecting piece is detachably connected with the elastic component 51, and the elastic component 51 pulls the locking ring 4 by the connecting piece 52 through the elasticity of the elastic component 51, so that the slip 3 is contracted to lock the sleeve; when it is desired to remove the casing head hanger, the connectors 52 may be disconnected from the resilient assembly 51 to allow the slips 3 to release the casing.
Referring to fig. 1, as a specific embodiment of the hanging structure for the oil pipe of the christmas tree provided by the present invention, a mounting groove 12 is formed on the side wall of a main pipe 1 of the christmas tree; the elastic member 51 includes:
a coil spring 511 disposed in the mounting groove 12 and axially disposed along the stationary ring base 2, one end of the coil spring adjacent to the locking ring 4 being limited by the inner wall of the mounting groove 12; and
the sliding block 512 is arranged in the mounting groove 12 in an axial sliding manner along the fixed ring seat 2 and abuts against one end, far away from the locking ring 4, of the spiral spring 511;
the connecting member 52 passes through the inner hole of the coil spring 511 and is detachably coupled to the slider 512.
In this embodiment, the elastic component 51 has a simple and compact structure and occupies a small space. The coupling member 52 is inserted through the inner hole of the coil spring 511, and guides the coil spring 511 to prevent the coil spring 511 from being deformed.
In a specific implementation, the mounting groove 12 is provided on a side wall of the main pipe 1 of the christmas tree and extends in an up-and-down direction. The spiral spring 511 and the sliding block 512 are both arranged in the mounting groove 12, the spiral spring 511 is arranged above the mounting groove 12, the sliding block 512 is arranged below the mounting groove, the upper end of the spiral spring 511 abuts against the inner wall of the upper end of the mounting groove 12, and the lower end of the spiral spring 511 abuts against the sliding block 512 to provide downward elastic force for the sliding block 512. The connecting member 52 is a bolt which passes through the through hole 41, the nut is limited by the locking ring 4, and the screw is inserted into the mounting groove 12 and threaded with the sliding block 512 through the coil spring 511.
Referring to fig. 1, as an embodiment of the hanging structure for the oil pipe of the christmas tree according to the present invention, a guiding hole 13 is disposed at an end of the mounting groove 12 away from the locking ring 4 along the axial direction of the fixing ring seat 2, and the sliding block 512 is disposed with a guiding rod 513 slidably engaged with the guiding hole 13.
In this embodiment, the guide rod 513 is slidably engaged with the guide hole 13, so that the sliding block 512 axially slides along the stationary ring seat 2 in the mounting groove 12.
In a specific implementation, the upper end of the sliding block 512 abuts against the coil spring 511, the lower end of the sliding block is provided with a guide rod 513 inserted into the guide hole 13, and the connecting piece 52 penetrates through the coil spring 511 and then is in threaded connection with the sliding block 512.
Referring to fig. 1 and 2, as an embodiment of the christmas tree oil pipe suspension structure provided in the present invention, the inner annular groove 11 includes:
a main cavity section 111 accommodating the stationary ring seat 2; and
the containing section 112 is used for containing the locking ring 4, the inner diameter of the containing section is larger than that of the main cavity section 111, and a step part 113 is formed at the joint of the containing section 112 and the main cavity section 111;
the mounting groove 12 and the elastic member 51 are provided on the step portion 113, the locking ring 4 is located in the receiving section 112, and the through hole 41 is opposite to the elastic member 51 in the axial direction of the fixed ring seat 2.
In this embodiment, the installation groove 12 is formed in the step portion 113, so that the through hole 41 of the locking ring 4 and the elastic member 51 can be opposed to each other in the axial direction of the fixed ring base 2, and the elastic force of the elastic member 51 can be more easily transmitted to the locking ring 4 through the connecting member 52.
During specific implementation, the main cavity section 111 is machined on the inner wall of the main tube 1 of the Christmas tree of the main cavity section 111, and the inner diameter of the main cavity section 111 is the same as the outer diameter of the fixed ring seat 2; processing an accommodating section 112 above the main cavity section 111, wherein the accommodating section 112 extends to the upper end opening of the main Christmas tree pipe 1, and the inner diameter of the accommodating section 112 is larger than that of the main cavity section 111 to form a step part 113; the step portion 113 is provided with an installation groove 12, and the elastic component 51 is installed in the installation groove 12. The inner diameter of the receiving section 112 is larger than the outer diameter of the locking ring 4 so that the locking ring 4 can be easily put into the receiving section 112 and the perforation 41 is maintained opposite to the elastic member 51.
Referring to fig. 1 and 2, as an embodiment of the christmas tree oil pipe suspension structure provided by the present invention, an installation groove 12 is open at one end close to the locking ring 4 and is adapted to accommodate a coil spring 511 and a slider 512; a detachable pressing sleeve 114 is arranged on the end face of the step part 113, and the pressing sleeve 114 blocks one end of the mounting groove 12 close to the locking ring 4;
after the coil spring 511 and the sliding block 512 are rotated into the mounting groove 12, one end of the coil spring 511 close to the locking ring 4 is limited by the pressing sleeve 114, and the connecting member 52 passes through the pressing sleeve 114.
In the embodiment, the pressing sleeve 114 can be detached, so that the spiral spring 511 and the sliding block 512 are conveniently arranged in the mounting groove 12, the structure is more reasonable, and the production and assembly are more convenient; after the pressing sleeve 114 is installed, the spiral spring 511 can be pressed, and the connecting piece 52 can penetrate through and be connected with the sliding block 512.
In a specific implementation, the mounting groove 12 with an open upper end may be drilled on the end surface of the step portion 113, and then an internal thread is machined on the upper end of the mounting groove 12 to mount the pressing sleeve 114. The inner diameter of the pressing sleeve 114 is larger than the outer diameter of the connecting piece 52, so that the connecting piece 52 can smoothly pass through the pressing sleeve 114 to be connected with the sliding block 512 in the mounting groove 12.
Referring to fig. 1, as an embodiment of the hanging structure for the oil pipe of the christmas tree according to the present invention, an inner sealing strip 43 for sealing with the oil pipe 6 is disposed on an inner ring of the locking ring 4.
In this embodiment, the inner sealing strip 43 is sealed between the oil pipe 6 and the locking ring 4, so as to seal the oil pipe suspension structure of the Christmas tree and the oil pipe 6.
Referring to fig. 1, as a specific embodiment of the christmas tree oil pipe suspension structure provided by the present invention, an inner ring of a locking ring 4 is provided with an inner sealing groove 42, and the inner sealing groove 42 has openings on an inner circumferential surface of the locking ring 4 and an end surface facing a slip 3, respectively; the inner seal 43 is provided in the inner seal groove 42, and has an inner periphery sealed with the oil pipe 6 and a side facing the slips 3 sealed with the slips 3.
In this embodiment, the inner sealing strip 43 seals the locking ring 4 and the oil pipe 6 and seals the locking ring 4 and the slip 3 at the same time, so that the structure is simple, and leakage between the locking ring 4 and the slip 3 is avoided.
Referring to fig. 1, as a specific embodiment of the hanging structure for the oil pipe of the christmas tree provided by the present invention, the outer circumference of the fixed ring seat 2 is sealed with the inner circumferential wall of the inner ring groove 11 by an outer sealing strip 21.
In the concrete implementation, seal in between fixed ring seat 2 and the internal perisporium of inner ring groove 11 through outer sealing strip 21, realize the sealed of production tree oil pipe suspended structure and fixed ring seat 2.
Referring to fig. 1 and 2, an embodiment of the present invention further provides a wellhead assembly, including: the Christmas tree oil pipe suspension structure of any one of the above.
Compared with the prior art, the wellhead device provided by the embodiment of the utility model adopts any one of the Christmas tree oil pipe suspension structures, after the oil pipe 6 is inserted into the slips 3, the elastic traction unit 5 pulls the locking ring 4 to push the slips 3 into the fixed ring seat 2, and the slips 3 lock the oil pipe 6 through the matching of the inverted conical surface on the outer periphery of the slips 3 and the inverted conical surface on the inner periphery of the fixed ring seat 2; when the oil pipe 6 moves axially, the elastic traction unit 5 can press the slips 3 in the fixed ring seat 2 through the locking ring 4 all the time, so that the slips 3 are prevented from being loosened, the slips 3 are guaranteed to hold the oil pipe 6 all the time, and the oil pipe 6 is prevented from sinking.
In the concrete implementation, the wellhead device is installed at the wellhead of oil and gas drilling and is used for controlling the pressure and direction of gas and liquid (oil, water and the like) fluid, suspending a casing and an oil pipe and sealing the oil pipe, the casing and annular spaces of all layers of casings. The oil production tree is generally composed of a casing head, an oil production tree, a blowout preventer stack, a four-way joint and a bypass pipe fitting, wherein the oil production tree adopts the oil production tree oil pipe suspension structure of the embodiment.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Production tree oil pipe suspended structure, its characterized in that includes:
the inner wall of the main pipe of the Christmas tree is provided with an inner ring groove;
the fixed ring seat is arranged in the inner ring groove, and the inner peripheral surface of the fixed ring seat is an inverted conical surface;
the slips are arranged in the fixed ring seat and used for tightly holding the oil pipe, and the outer peripheral surface of the slips is an inverted conical surface and is matched with the inner peripheral surface of the fixed ring seat;
the locking ring is abutted against one end, far away from the fixed ring seat, of the slip; and
and the elastic traction unit is arranged between the locking ring and the Christmas tree main pipe and is suitable for traction the locking ring so as to push the slips into the fixed ring seat.
2. The Christmas tree tubing suspension of claim 1 wherein the locking ring is provided with perforations and the resilient pull unit comprises:
the elastic component is arranged on the side wall of the main pipe of the Christmas tree and provides elastic force along the axial direction of the fixed ring seat; and
and the connecting piece penetrates through the through hole, one end of the connecting piece is limited by the locking ring, and the other end of the connecting piece is detachably connected with the elastic assembly.
3. The Christmas tree tubing suspension of claim 2 wherein the sidewall of the main tree tube is provided with a mounting groove; the elastic assembly includes:
the spiral spring is arranged in the mounting groove, is arranged along the axial direction of the fixed ring seat, and is limited by the inner wall of the mounting groove at one end close to the locking ring; and
the sliding block is arranged in the mounting groove in an axial sliding mode along the fixed ring seat and abuts against one end, far away from the locking ring, of the spiral spring;
the connecting piece passes through the inner hole of the spiral spring and is detachably connected with the sliding block.
4. The Christmas tree tubing suspension of claim 3 wherein the end of the mounting groove remote from the locking ring is provided with a guide hole along the axial direction of the fixing ring seat, and the slider is provided with a guide rod which is slidably engaged with the guide hole.
5. The Christmas tree tubing suspension of claim 3 wherein said inner annulus comprises:
a main cavity section accommodating the stationary ring seat; and
the containing section is used for containing the locking ring, the inner diameter of the containing section is larger than that of the main cavity section, and a step part is formed at the joint of the containing section and the main cavity section;
the mounting groove and the elastic component are arranged on the step part, the locking ring is positioned in the accommodating section, and the through hole is opposite to the elastic component in the axial direction of the fixed ring seat.
6. The Christmas tree tubing suspension of claim 5 wherein said mounting groove is open at an end adjacent said locking ring and is adapted to receive said coil spring and said slider; a detachable pressing sleeve is arranged on the end face of the step part, and the pressing sleeve blocks one end, close to the locking ring, of the mounting groove;
after the spiral spring and the sliding block are rotated into the mounting groove, one end, close to the locking ring, of the spiral spring is limited by the pressing sleeve, and the connecting piece penetrates through the pressing sleeve.
7. The Christmas tree tubing suspension of any of claims 1 to 6 wherein the inner rings of the locking rings are provided with inner sealing strips for sealing against the tubing.
8. The christmas tree tubing suspension structure of claim 7, wherein said inner ring of said locking ring is provided with an inner seal groove having openings on an inner circumferential surface of said locking ring and an end surface facing said slips, respectively; the inner sealing strip is arranged in the inner sealing groove, the inner periphery of the inner sealing strip is sealed with the oil pipe, and one side of the slip faces the slip and is sealed with the slip.
9. The Christmas tree tubing suspension of any of claims 1 to 6 wherein the outer circumference of the retaining ring seat is sealed to the inner circumferential wall of the inner annular groove by an outer sealing strip.
10. A wellhead assembly, comprising: the Christmas tree tubing suspension of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557394.9U CN215949418U (en) | 2021-10-22 | 2021-10-22 | Christmas tree oil pipe suspension structure and wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557394.9U CN215949418U (en) | 2021-10-22 | 2021-10-22 | Christmas tree oil pipe suspension structure and wellhead device |
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| Publication Number | Publication Date |
|---|---|
| CN215949418U true CN215949418U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122557394.9U Active CN215949418U (en) | 2021-10-22 | 2021-10-22 | Christmas tree oil pipe suspension structure and wellhead device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116446817A (en) * | 2023-06-20 | 2023-07-18 | 什邡慧丰采油机械有限责任公司 | Single-cylinder double-well wellhead device for efficiently producing oil and gas and working method thereof |
-
2021
- 2021-10-22 CN CN202122557394.9U patent/CN215949418U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116446817A (en) * | 2023-06-20 | 2023-07-18 | 什邡慧丰采油机械有限责任公司 | Single-cylinder double-well wellhead device for efficiently producing oil and gas and working method thereof |
| CN116446817B (en) * | 2023-06-20 | 2023-08-25 | 什邡慧丰采油机械有限责任公司 | Single-cylinder double-well wellhead device for efficiently producing oil and gas and working method thereof |
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