CN113863886A - Casing head and wellhead assembly - Google Patents
Casing head and wellhead assembly Download PDFInfo
- Publication number
- CN113863886A CN113863886A CN202111372701.4A CN202111372701A CN113863886A CN 113863886 A CN113863886 A CN 113863886A CN 202111372701 A CN202111372701 A CN 202111372701A CN 113863886 A CN113863886 A CN 113863886A
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- slip
- ring
- casing head
- casing
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 241000191291 Abies alba Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a casing head and a wellhead device, and belongs to the field of oil and gas exploitation equipment. The casing head comprises a main body, a slip seat, a slip, a pressing ring and an elastic bolt structure. An inner ring groove is arranged on the inner wall of the main body; the slip seat is arranged in the inner ring groove, and the inner peripheral surface of the slip seat is an inverted conical surface; the slips are arranged in the slip seat and used for tightly holding the sleeve, and the outer peripheral surface of the slips is an inverted conical surface and matched with the inner peripheral surface of the slip seat; the pressing ring is abutted against one end of the slip, which is far away from the slip seat; the elastic bolt structure comprises a nut section, a screw section axially sliding with the nut section, a screw section in circumferential limit fit, and an elastic piece which is arranged between the nut section and the screw section and provides opposite tensile force, wherein the nut section is limited by a compression ring, and the screw section is in threaded connection with the main body. The wellhead assembly adopts foretell casing head, adopts independent elasticity bolt structure to provide the pulling force for the clamping ring, rotation nut section that can be convenient to drive screw rod section and main part separation, thereby change whole elasticity bolt structure, need not to dismantle whole hanger and maintain.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation equipment, and particularly relates to a casing head and a wellhead device.
Background
A hanger is a device mounted within a casing head for hanging a casing. The hanger mainly comprises slips and a slip seat. The slips are annular, and the slip seat is also annularly sleeved outside the slips. The outer peripheral surface of the slip and the inner peripheral surface of the slip seat are inverted conical surfaces and are attached to each other, after the casing pipe is inserted into the slip, the casing pipe and the annular sleeve sink under the gravity, and the slip is tightly pressed on the casing pipe by the conical inner peripheral surface of the slip seat at the moment, so that the casing pipe is locked by the slip, and the casing pipe is prevented from continuing to sink.
However, in the oil and gas drilling operation, the casing pipe can generate axial movement after being subjected to the combined action of various forces, so that the slips are easily loosened, the casing pipe sinks, and the normal operation of an oil well is influenced. Although the inventor has already proposed a hanger, which presses the slips into the slip seat through the elastic pulling structure, so that the slips always keep the structure of holding the casing pipe tightly, thereby avoiding the problem of casing pipe sinking, the elastic pulling structure of the hanger has more movable parts, which are easily damaged after long-term use, and the whole hanger needs to be disassembled for maintenance after the elastic pulling structure is damaged, which is very inconvenient.
Disclosure of Invention
The invention aims to provide a casing head and a wellhead device, and aims to solve the technical problem that a casing sinks due to the fact that a slip is easy to loosen when the casing axially moves in the prior art.
In order to achieve the above object, the present invention adopts a technical solution in which a casing head is provided, including:
the inner wall of the main body is provided with an inner ring groove;
the slip seat is arranged in the inner annular groove, and the inner circumferential surface of the slip seat is an inverted conical surface;
the slips are arranged in the slip seat and used for tightly holding the sleeve, and the outer peripheral surface of the slips is an inverted conical surface and is matched with the inner peripheral surface of the slip seat;
the pressing ring is abutted against one end of the slip, which is far away from the slip seat; and
elastic bolt structure, including the nut section, with nut section axial slip, the spacing complex screw rod section of circumference and locating the nut section with between the screw rod section and provide tensile elastic component in opposite directions, the nut section with the clamping ring is spacing, the screw rod section with main part threaded connection.
As another embodiment of this application, the clamping ring is equipped with the perforating hole, the nut section includes:
the cap head is limited on one side of the compression ring, which is back to the slip seat; and
and one end of the hollow pipe is connected with the cap head, and the other end of the hollow pipe penetrates through the through hole and is sleeved outside the screw section and is in axial sliding and circumferential limiting fit with the screw section.
As another embodiment of the application, an axial guide groove is arranged on the side wall of the hollow pipe, and a lug embedded in the axial guide groove is arranged on the side surface of one end, inserted into the hollow pipe, of the screw section.
As another embodiment of this application, the elastic component is coil spring, coil spring be located in the cavity and overlap in outside the screw rod section, coil spring one end with the screw rod section inserts the tip of the one end in the cavity offsets, the other end with the cavity tube housing in the tip of the outer one end of screw rod section offsets.
As another embodiment of the present application, the cap head is provided with a relief hole communicating with the hollow tube.
As another embodiment of this application, the casing head still includes the loosening bolt, loosen the bolt with loosen hole screw-thread fit, and be suitable for the ejection the screw rod section stretches out outside the sky pipe.
As another embodiment of the present application, the inner ring groove includes:
a primary cavity section housing the slip bowl; and
the accommodating section is used for accommodating the pressing ring, the inner diameter of the accommodating section is larger than that of the main cavity section, and a step part is formed at the joint of the accommodating section and the main cavity section;
the screw section is in threaded connection with the end face of the step portion.
As another embodiment of this application, the clamping ring internal periphery be equipped with be suitable for with the sealed inner seal circle of sleeve pipe, the periphery of slip seat be equipped with the sealed outer seal circle of inner ring inslot inner wall.
As another embodiment of the present application, an inner sealing groove is disposed in the inner ring of the pressure ring, and the inner sealing groove has openings in the inner circumferential surface of the pressure ring and in the end surface facing the slip; the inner seal ring is arranged in the inner seal groove, the inner periphery of the inner seal ring is sealed with the sleeve, and one side of the slip faces the slip and is sealed with the slip.
The casing head provided by the embodiment of the invention has the beneficial effects that: compared with the prior art, the casing head provided by the embodiment of the invention has the advantages that the elastic piece provides opposite pulling force for the screw cap section and the screw rod section, and the pressing ring is pulled to press the slips in the slip seat, so that the slips always hold the casing when the casing axially moves, and the casing is prevented from sinking; adopt independent elasticity bolt structure to provide pulling force for the clamping ring, after elasticity bolt structure damages, rotation nut section that can be convenient to drive screw rod section and main part separation, thereby change whole elasticity bolt structure, need not to dismantle whole hanger and maintain.
Another technical solution adopted by the present invention is to provide a wellhead assembly, comprising: the casing head of any of the above.
The wellhead device provided by the embodiment of the invention has the beneficial effects that: compared with the prior art, according to the wellhead device provided by the embodiment of the invention, the casing head is adopted, the elastic piece provides opposite pulling force for the screw cap section and the screw rod section, the press ring is pulled to press the slips in the slip seat, so that the slips always cling to the casing when the casing axially moves, and the casing is prevented from sinking; adopt independent elasticity bolt structure to provide pulling force for the clamping ring, after elasticity bolt structure damages, rotation nut section that can be convenient to drive screw rod section and main part separation, thereby change whole elasticity bolt structure, need not to dismantle whole hanger and maintain.
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 casing head provided in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the resilient bolt structure of FIG. 1 at A;
FIG. 3 is a cross-sectional view of the resilient bolt structure of FIG. 2 after installation of a loose bolt;
fig. 4 is a side view of the spring bolt structure of fig. 1.
Wherein, in the figures, the respective reference numerals:
1-a body; 11-inner ring groove; 111-a main cavity section; 112-a containment section; 2-a slip seat; 21-outer sealing ring; 3-slips; 4-pressing a ring; 41-inner sealing ring; 5-elastic bolt structure; 51-nut segments; 511-a cap head; 512-empty pipe; 513-axial guide slots; 514-loosening the pores; 515-loosening the bolt; 52-screw section; 521-a lug; 53-helical spring.
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 invention and are not intended to limit the invention.
Referring to fig. 1 to 4 together, a casing head according to an embodiment of the present invention will now be described. A casing head, comprising:
the inner wall of the main body 1 is provided with an inner ring groove 11;
the slip seat 2 is arranged in the inner annular groove 11, and the inner circumferential surface of the slip seat is an inverted conical surface;
the slips 3 are arranged in the slip seat 2 and used for tightly holding the casing pipe, and the outer peripheral surface of the slips is an inverted conical surface and matched with the inner peripheral surface of the slip seat 2;
the pressing ring 4 is abutted against one end of the slip 3, which is far away from the slip seat 2; and
Compared with the prior art, the casing head provided by the embodiment of the invention has the advantages that the elastic piece provides opposite pulling force for the screw cap section 51 and the screw rod section 52, and the pressing ring 4 is pulled to press the slips 3 in the slip seat 2, so that the slips 3 always hold the casing when the casing axially moves, and the casing is prevented from sinking; adopt independent elasticity bolt structure 5 to provide pulling force for clamping ring 4, damage the back when elasticity bolt structure 5, rotation nut section 51 that can be convenient to drive screw rod section 52 and main part 1 separation, thereby change whole elasticity bolt structure 5, need not to dismantle whole hanger and maintain.
In this embodiment, the slips 3 are annular and have a gap so that the slips 3 can be retracted. The slip seat 2 is annular and is sleeved outside the slip 3, and the inverted conical surface on the outer periphery of the slip 3 is attached to the inverted conical surface on the inner periphery of the slip seat 2; an annular inner ring groove 11 is processed on the inner wall of the upper end of the main body 1, and the assembled slips 3 and the slip seat 2 are placed in the inner ring groove 11. Pressing ring 4 presses in the top of slips 3, and the nut section 51 of elastic bolt structure 5 is fixed with pressing ring 4, screw rod section 52 and the 2 threaded connection of slip seat for the elastic transmission of elastic component gives pressing ring 4, makes pressing ring 4 impress slips 3 downwards in slip seat 2, and then makes 3 contractions of slips lock the sleeve pipe.
Referring to fig. 2 to 4, as an embodiment of the casing head according to the present invention, the press ring 4 has a through hole, and the nut segment 51 includes:
the cap head 511 is limited at one side of the pressing ring 4, which is back to the slip seat 2; and
one end of the hollow pipe 512 is connected with the cap head 511, and the other end thereof passes through the through hole and is sleeved outside the screw section 52, and is in axial sliding and circumferential limiting fit with the screw section 52.
In a specific implementation, the through hole vertically penetrates through the pressing ring 4, and after the hollow tube 512 penetrates through the through hole, the cap head 511 is clamped on one side of the pressing ring 4, which faces away from the slip seat 2. One end of the screw rod section 52 is inserted into the hollow pipe 512 to form axial sliding fit, and circumferential limiting fit can be realized by arranging other circumferential limiting structures.
Referring to fig. 2 to 4, as an embodiment of the casing head provided by the present invention, an axial guide slot 513 is provided on a side wall of the hollow pipe 512, and a side surface of an end of the screw section 52 inserted into the hollow pipe 512 is provided with a lug 521 embedded in the axial guide slot 513.
In this embodiment, the protruding lug 521 is embedded in the axial guide groove 513, so as to not only axially guide the screw segment 52, but also circumferentially limit the hollow tube 512 and the screw segment 52.
In a specific implementation, the left and right side walls of the hollow tube 512 are respectively provided with a long axial guide slot 513, the left and right sides of one end of the screw section 52 inserted into the hollow tube 512 are respectively provided with a lug 521, and the two lugs 521 are respectively inserted into the corresponding axial guide slots 513.
Referring to fig. 2 and 4, as an embodiment of the casing head according to the present invention, the elastic member is a coil spring 53, the coil spring 53 is located inside the hollow tube 512 and is sleeved outside the screw section 52, one end of the coil spring 53 abuts against an end of the screw section 52 inserted into the hollow tube 512, and the other end abuts against an end of the hollow tube 512 sleeved outside the screw section 52.
In this embodiment, the coil spring 53 is located in the empty pipe 512 and is sleeved outside the screw section 52, so that the volume is compact, the installation in a narrow space on the main pipe of the Christmas tree can be more convenient, and the screw section 52 can support the coil spring 53 to prevent the coil spring 53 from bending.
In a specific implementation, the end of the screw section 52 inserted into the hollow tube 512 may be enlarged in diameter, so that the end of the coil spring 53 may directly abut against the enlarged diameter portion, thereby achieving abutment against the end of the screw section 52 inserted into the hollow tube 512. The end of the screw section 52 inserted into the hollow tube 512 may also be provided with a lug 521, and the end of the coil spring 53 may directly abut against the lug 521, so as to abut against the end of the screw section 52 inserted into the hollow tube 512. The end of the hollow tube 512 sleeved outside the screw section 52 may be provided with an inward flange, so that the end of the coil spring 53 may abut against the flange, thereby abutting against the end of the hollow tube 512 sleeved outside the screw section 52.
Referring to fig. 2 and 4, as an embodiment of the cannula head provided in the present invention, the cap head 511 is provided with a relief hole 514 communicating with the hollow tube 512.
In this embodiment, the long rod can be inserted into the empty pipe 512 from the releasing hole 514, and the screw rod segment 52 is pushed to compress the elastic member, so that the pressing ring 4 does not press the slip 3, and the slip 3 can be withdrawn from the slip seat 2, thereby releasing the casing and facilitating the replacement of the casing or the hanger. In particular implementations, a relief hole 514 extends through the cap head 511 and communicates with the hollow tube 512.
Referring to fig. 4, as an embodiment of the casing head according to the present invention, the casing head further includes a loosening bolt 515, and the loosening bolt 515 is threadedly engaged with the loosening hole 514 and adapted to push the screw section 52 out of the hollow tube 512.
In this embodiment, by screwing the loosening bolt 515, the loosening bolt 515 can be inserted into the empty pipe 512 to push the screw section 52 to compress the elastic member, thereby loosening the casing and facilitating the replacement of the casing or the hanger. And when the loosening bolt 515 is screwed into the loosening hole 514, the elastic member is self-locked and kept compressed, and the cap head 511 can be screwed more easily to detach the elastic bolt structure 5.
Referring to fig. 1, as an embodiment of the casing head according to the present invention, the inner annular groove 11 includes:
a main cavity section 111 housing the slip bowl 2; and
the accommodating section 112 accommodates the pressing ring 4, the inner diameter of the accommodating section is larger than that of the main cavity section 111, and a step part is formed at the joint of the accommodating section 112 and the main cavity section 111;
the screw section 52 is screwed to the end surface of the stepped portion.
In this embodiment, the screw section 52 is more easily screwed by the stepped portion formed by the main section 111 and the accommodating section 112. In specific implementation, a main cavity section 111 is machined on the inner wall of the main body 1, and the inner diameter of the main cavity section 111 is the same as the outer diameter of the slip seat 2; an accommodating section 112 is machined above the main cavity section 111, the accommodating section 112 is opened to the upper end of the main body 1, the inner diameter of the accommodating section 112 is larger than that of the main cavity section 111, a step part is formed, and one end of the screw section 52 is in threaded connection with the end face of the step part. The inner diameter of the accommodating section 112 is larger than the outer diameter of the pressing ring 4, so that the pressing ring 4 can be easily put into the accommodating section 112, and the through hole is kept opposite to the end face of the step portion.
Referring to fig. 1, as a specific embodiment of the casing head according to the present invention, an inner sealing ring 41 adapted to seal with the casing is disposed on an inner circumference of the pressing ring 4, and an outer sealing ring 21 adapted to seal with an inner wall of the inner annular groove 11 is disposed on an outer circumference of the slip bowl 2.
In this embodiment, the inner seal ring 41 is sealed between the sleeve and the sleeve to seal the inner seal ring 41 and the sleeve, and the outer seal ring 21 is sealed between the slip bowl 2 and the inner peripheral wall of the inner annular groove 11 (specifically, the main cavity 111) to seal the sleeve and the main body 1.
Referring to fig. 1, as a specific embodiment of the casing head according to the present invention, an inner ring of the pressure ring 4 is provided with an inner sealing groove, and the inner sealing groove has openings on an inner circumferential surface of the pressure ring 4 and an end surface facing the slip 3; the inner seal ring 41 is provided in the inner seal groove, and has an inner periphery sealed with the casing and a side facing the slips 3 sealed with the slips 3.
In this embodiment, the inner sealing ring 41 seals the pressing ring 4 and the sleeve, and the pressing ring 4 and the slip 3 at the same time, so that the structure is simple, and leakage between the pressing ring 4 and the slip 3 is avoided.
An embodiment of the present invention further provides a wellhead device, including: the casing head of any of the above.
Compared with the prior art, the wellhead device provided by the embodiment of the invention has the advantages that any one of the casing heads is adopted, the elastic piece provides opposite pulling force for the nut section 51 and the screw section 52, the compression ring 4 is pulled to press the slips 3 in the slip seat 2, so that the slips 3 always hold the casing when the casing axially moves, and the casing is prevented from sinking; adopt independent elasticity bolt structure 5 to provide pulling force for clamping ring 4, damage the back when elasticity bolt structure 5, rotation nut section 51 that can be convenient to drive screw rod section 52 and main part 1 separation, thereby change whole elasticity bolt structure 5, need not to dismantle whole hanger and maintain.
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 blowout preventer stack is generally composed of a casing head, a Christmas tree, a blowout preventer stack, a four-way joint and a bypass pipe fitting, wherein the casing head adopts the casing head 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. The casing head, its characterized in that includes:
the inner wall of the main body is provided with an inner ring groove;
the slip seat is arranged in the inner annular groove, and the inner circumferential surface of the slip seat is an inverted conical surface;
the slips are arranged in the slip seat and used for tightly holding the sleeve, and the outer peripheral surface of the slips is an inverted conical surface and is matched with the inner peripheral surface of the slip seat;
the pressing ring is abutted against one end of the slip, which is far away from the slip seat; and
elastic bolt structure, including the nut section, with nut section axial slip, the spacing complex screw rod section of circumference and locating the nut section with between the screw rod section and provide tensile elastic component in opposite directions, the nut section with the clamping ring is spacing, the screw rod section with main part threaded connection.
2. The casing head of claim 1 wherein the collar defines a through-hole, the nut segment comprising:
the cap head is limited on one side of the compression ring, which is back to the slip seat; and
and one end of the hollow pipe is connected with the cap head, and the other end of the hollow pipe penetrates through the through hole and is sleeved outside the screw section and is in axial sliding and circumferential limiting fit with the screw section.
3. The casing head according to claim 2 wherein the hollow pipe has an axial guide groove in a side wall thereof, and a lug is provided on a side surface of an end of the screw section inserted into the hollow pipe to be fitted into the axial guide groove.
4. The casing head of claim 2 wherein said resilient member is a coil spring disposed within said hollow tube and surrounding said screw section, said coil spring having one end abutting an end of said screw section inserted into said hollow tube and the other end abutting an end of said hollow tube surrounding said screw section.
5. The casing head of claim 2 wherein the cap head is provided with a relief hole in communication with the hollow tube.
6. The casing head of claim 5 further comprising a loosening bolt threadably engaged with said loosening hole and adapted to urge said screw section out of said casing.
7. The casing head of claim 1 wherein the inner race comprises:
a primary cavity section housing the slip bowl; and
the accommodating section is used for accommodating the pressing ring, the inner diameter of the accommodating section is larger than that of the main cavity section, and a step part is formed at the joint of the accommodating section and the main cavity section;
the screw section is in threaded connection with the end face of the step portion.
8. The casing head as claimed in claim 1, wherein the inner circumference of the pressure ring is provided with an inner sealing ring adapted to seal with the casing, and the outer circumference of the slip bowl is provided with an outer sealing ring sealing with the inner wall of the inner annular groove.
9. The casing head of claim 8, wherein the inner ring of the pressure ring is provided with an inner sealing groove having openings on an inner circumferential surface of the pressure ring and an end surface facing the slips, respectively; the inner seal ring is arranged in the inner seal groove, the inner periphery of the inner seal ring is sealed with the sleeve, and one side of the slip faces the slip and is sealed with the slip.
10. A wellhead assembly, comprising: the casing head of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111372701.4A CN113863886B (en) | 2021-11-18 | 2021-11-18 | Casing head and wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111372701.4A CN113863886B (en) | 2021-11-18 | 2021-11-18 | Casing head and wellhead device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113863886A true CN113863886A (en) | 2021-12-31 |
| CN113863886B CN113863886B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111372701.4A Active CN113863886B (en) | 2021-11-18 | 2021-11-18 | Casing head and wellhead device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113863886B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841717A (en) * | 2014-07-10 | 2015-08-19 | 无锡市威特机械有限公司 | Extrusion rod compressing apparatus for extruder |
| CN207526459U (en) * | 2017-10-29 | 2018-06-22 | 江苏腾龙石化机械有限公司 | A kind of improved gas wellhead equipment |
| CN208073410U (en) * | 2018-01-31 | 2018-11-09 | 西派集团有限公司 | A kind of Novel casing head device |
| CN208702369U (en) * | 2018-08-17 | 2019-04-05 | 大庆市华禹石油机械制造有限公司 | A kind of Simple casing head of sealed reliable |
| CN112253035A (en) * | 2020-10-09 | 2021-01-22 | 盐城市荣嘉机械制造有限公司 | Well drilling blowout prevention structure and device thereof |
-
2021
- 2021-11-18 CN CN202111372701.4A patent/CN113863886B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841717A (en) * | 2014-07-10 | 2015-08-19 | 无锡市威特机械有限公司 | Extrusion rod compressing apparatus for extruder |
| CN207526459U (en) * | 2017-10-29 | 2018-06-22 | 江苏腾龙石化机械有限公司 | A kind of improved gas wellhead equipment |
| CN208073410U (en) * | 2018-01-31 | 2018-11-09 | 西派集团有限公司 | A kind of Novel casing head device |
| CN208702369U (en) * | 2018-08-17 | 2019-04-05 | 大庆市华禹石油机械制造有限公司 | A kind of Simple casing head of sealed reliable |
| CN112253035A (en) * | 2020-10-09 | 2021-01-22 | 盐城市荣嘉机械制造有限公司 | Well drilling blowout prevention structure and device thereof |
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| Publication number | Publication date |
|---|---|
| CN113863886B (en) | 2023-10-20 |
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Denomination of invention: Casing head and wellhead equipment Effective date of registration: 20231213 Granted publication date: 20231020 Pledgee: Agricultural Bank of China Limited Wuqiang County Branch Pledgor: JING HONG OIL DRILLING ENGINEERING TECHNOLOGY CO.,LTD. Registration number: Y2023980071440 |
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