CN116733409A - Oil recovery well head casing head - Google Patents
Oil recovery well head casing head Download PDFInfo
- Publication number
- CN116733409A CN116733409A CN202311018014.1A CN202311018014A CN116733409A CN 116733409 A CN116733409 A CN 116733409A CN 202311018014 A CN202311018014 A CN 202311018014A CN 116733409 A CN116733409 A CN 116733409A
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- casing
- casing head
- layer
- baffle plates
- pipe body
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- 238000011084 recovery Methods 0.000 title claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 84
- 238000007789 sealing Methods 0.000 claims description 8
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 23
- 238000000926 separation method Methods 0.000 abstract description 15
- 238000000605 extraction Methods 0.000 abstract description 7
- 238000010030 laminating Methods 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000001595 contractor effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The application provides an oil extraction wellhead casing head, and relates to the field of oil exploitation. This oil recovery well head casing head, including the body subassembly, the body subassembly includes casing head body, top layer sleeve pipe and technical sleeve pipe, the top layer sleeve pipe sets up inside the bottom port of casing head body, top-down that the inside of casing head body is located top layer sleeve pipe has set gradually upper strata scour protection subassembly and lower floor scour protection subassembly, technical sleeve's outside alternates in casing head body's inside and is located top layer sleeve's inside, technical sleeve's outside passes upper strata scour protection subassembly and lower floor scour protection subassembly's inside. Through the effect of elastic ring, can make the laminating of the bottom of separation blade in the outside of technical sleeve pipe to form double-deck separation effect between hanger and high pressure environment, finally realized the separation high pressure environment and formed the purpose of impact effect to the hanger, reached the effect of protection structural strength, guarantee leakproofness.
Description
Technical Field
The application relates to the technical field of oil exploitation, in particular to an oil extraction wellhead casing head.
Background
Casing head, the well head that is used for fixed drilling well promptly, connects well head casing string for support the gravity of technical sleeve pipe and reservoir sleeve pipe, sealed each inter-layer annular space provides transitional coupling for installation preventer, tubing head, christmas tree, and through two side mouths on the casing head body, can carry out construction operations such as makeup and extrusion mud, control and filling balancing liquid.
When the classical single-layer threaded casing head is used, for example, the casing head of an oil extraction wellhead according to the present application, as shown in fig. 1-2 of the specification, high-pressure fluid flows through the communication space formed between the surface casing 107 and the technical casing 111 and between the surface casing 107 and the lateral casing 102 (i.e. construction operations such as slurry supplementing, slurry monitoring and balance liquid filling are performed), so that the high-pressure environment can form an impact effect on the hanger 110, after long-term use, the tightness between the hanger 110 and the technical casing 111 and between the hanger 110 and the casing head pipe body 101 is damaged, and thus leakage risks occur, and meanwhile, the fatigue degree of structural materials is increased due to long-time impact, so that the service life is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides the casing head of the oil extraction wellhead, which solves the problem that high-pressure fluid can impact and damage a hanger during high-pressure operation between a surface casing and a technical casing.
In order to achieve the above purpose, the application is realized by the following technical scheme: the casing head of the oil extraction wellhead comprises a pipe body assembly, wherein the pipe body assembly comprises a casing head pipe body, a surface casing and a technical casing, the surface casing is arranged inside a bottom end port of the casing head pipe body, an upper-layer anti-impact assembly and a lower-layer anti-impact assembly are sequentially arranged above the surface casing in the casing head pipe body from top to bottom, the outside of the technical casing is inserted into the casing head pipe body and is positioned inside the surface casing, and the outside of the technical casing penetrates through the upper-layer anti-impact assembly and the lower-layer anti-impact assembly;
the upper-layer anti-impact assembly comprises a plurality of upper-layer baffle plates and a first elastic ring, wherein a bottomless bowl-shaped structure is formed by encircling the upper-layer baffle plates, the lower ends of the bottomless bowl-shaped structure are tightly matched with the outside of the technical sleeve, adjacent upper-layer baffle plates are tightly matched with each other, a first shaft seat is arranged on the upper side of the bottom of each upper-layer baffle plate, a rotating shaft is arranged in each first shaft seat, two ends of each rotating shaft are respectively and rotatably connected with an installation seat, the outer sides of the installation seats are respectively and correspondingly arranged on the inner wall of the sleeve head pipe body, first connecting blocks are arranged on the lower sides of the bottoms of the upper-layer baffle plates, and the first connecting blocks are connected with each other in a penetrating manner through the first elastic ring;
the lower-layer anti-impact assembly comprises a plurality of lower-layer baffle plates and a second elastic ring, wherein a plurality of lower-layer baffle plates are wound to form another bottomless bowl-shaped structure and are tightly matched with the outside of the technical sleeve from the bottom end opening of the other bottomless bowl-shaped structure, adjacent lower-layer baffle plates are tightly matched with each other, a second shaft seat is arranged on the upper side of the top of each lower-layer baffle plate, another rotating shaft is arranged in each second shaft seat, two ends of each other rotating shaft are respectively and rotatably connected with another mounting seat, the outer sides of the other mounting seats are respectively and correspondingly arranged on the inner wall of the sleeve head pipe body, second connecting blocks are arranged on the lower sides of the tops of the lower-layer baffle plates, and the second connecting blocks are connected with each other in an interpenetration manner through the second elastic ring;
the joint between the adjacent upper baffle plates and the joint between the adjacent lower baffle plates are staggered.
Preferably, side port pipes are arranged on two sides of the middle of the casing head pipe body, and flat valves are arranged at outer ports of the side port pipes.
Preferably, an upper connecting flange is arranged outside the top end opening of the casing head pipe body.
Preferably, a plurality of grease injection holes are formed in one circle of the inner part of the upper connecting flange, the inner parts of the grease injection holes are communicated with the inner part of the casing head pipe body, and the inner parts of the grease injection holes are connected with plugging bolts in a threaded manner.
Preferably, the top end opening of the surface sleeve is externally connected with the bottom end opening of the sleeve head pipe body in a threaded manner, and the bottom end opening of the sleeve head pipe body is internally positioned at the top end of the surface sleeve and is embedded with a sealing ring.
Preferably, the inside of casing head body is located the top of upper strata scour protection subassembly and is provided with the boss, the big bottom mouth of top of boss is little back taper platform form, the outside nested of technique sheathed tube has the hanger, the outside of hanger inlays in the inside of casing head body just the cooperation is hugged closely at the top of boss to the bottom of hanger.
Working principle: when the wellhead casing head is used, high-pressure fluid flows through a communication space formed between the surface casing and the technical casing and between the surface casing and the lateral casing, so that an impact effect is formed on the hanger by the high-pressure environment, after the wellhead casing head is used for a long time, the tightness between the hanger and the technical casing and between the hanger and the casing head pipe body is damaged, the leakage risk is further caused, the fatigue degree of structural materials is increased due to long-time impact, the service life is reduced, at the moment, the second connecting block can be pulled to be folded towards the center of the second elastic ring through the elastic shrinkage action of the second elastic ring, the lower-layer baffle can be driven to be folded towards the center of the second elastic ring by the second connecting block, and the bottom of the lower-layer baffle can be attached to the outer side of the technical casing, therefore, the sealing effect between the plurality of lower baffle plates is utilized, the blocking can be formed between the hanger and the high-pressure environment, the purpose that the blocking high-pressure environment forms an impact effect on the hanger is finally realized, the effects of protecting the structural strength and guaranteeing the sealing performance are achieved, furthermore, the upper-layer anti-impact assembly is additionally arranged above the lower-layer anti-impact assembly for enhancing the blocking effect of the lower-layer anti-impact assembly, at the moment, the first connecting block can be pulled to fold towards the center of the first elastic ring through the elastic shrinkage effect of the first elastic ring, the upper-layer baffle plates can also deflect up and down in the casing head pipe body, the first connecting block can drive the upper-layer baffle plates to fold towards the center of the first elastic ring from the bottom of the upper-layer baffle plates, the bottom of the upper-layer baffle plates can be attached to the outer side of the technical casing, and the sealing effect between the plurality of upper-layer baffle plates is utilized, can form the separation again between hanger and lower floor's scour protection subassembly, and the junction between the adjacent upper strata separation blade and the junction between the adjacent lower floor separation blade are crisscross to be set up, have finally realized strengthening the purpose that the separation high pressure environment formed the impact effect to the hanger for this oil recovery well head casing head sealed result of use is better, and structural life is longer.
The application provides an oil extraction wellhead casing head. The beneficial effects are as follows:
according to the application, through the elastic contraction effect of the second elastic ring, the lower-layer baffle plate can be driven to be folded from the bottom of the lower-layer baffle plate to the center of the second elastic ring, and then the bottom of the lower-layer baffle plate can be attached to the outer side of the technical sleeve, so that the blocking effect between the hanger and the high-pressure environment can be utilized, the purpose of blocking the impact effect of the high-pressure environment on the hanger is finally realized, and the effects of protecting the structural strength and guaranteeing the tightness are achieved.
According to the application, through the elastic contraction effect of the first elastic ring, the upper-layer baffle plates can be driven to be folded from the bottom of the upper-layer baffle plates to the center of the first elastic ring, and then the bottom of the upper-layer baffle plates can be attached to the outer side of the technical sleeve, so that the blocking effect among a plurality of upper-layer baffle plates is utilized, the blocking can be formed again between the hanger and the lower-layer anti-impact assembly, the joint between the adjacent upper-layer baffle plates and the joint between the adjacent lower-layer baffle plates are staggered, and finally, the purpose of enhancing the impact effect of blocking high-pressure environment on the hanger is realized, so that the sealing and using effect of the casing head of the oil extraction wellhead is better, and the structural life is longer.
Drawings
FIG. 1 is a schematic perspective view of the present application;
FIG. 2 is a schematic view of the interior of a casing head tube of the present application;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view of the upper and lower impact protection assemblies of the present application;
FIG. 5 is an enlarged view at B in FIG. 4;
FIG. 6 is a schematic diagram of the upper and lower anti-collision assemblies according to the present application;
FIG. 7 is another schematic view of the structure of FIG. 6;
FIG. 8 is a schematic view of an upper impact assembly installation of the present application;
FIG. 9 is an enlarged view of FIG. 8 at C;
FIG. 10 is a schematic view of the lower impact assembly of the present application;
fig. 11 is an enlarged view of D in fig. 10.
Wherein, 1, a pipe body component; 101. a casing head pipe body; 102. a side port tube; 103. a flat valve; 104. an upper connecting flange; 105. injecting grease holes; 106. plugging the plug; 107. a surface layer sleeve; 108. a seal ring; 109. a boss; 110. a hanger; 111. a technical sleeve; 2. an upper layer anti-collision assembly; 201. an upper layer baffle; 202. a first shaft seat; 203. a first connection block; 204. a first elastic ring; 3. a lower layer anti-collision component; 301. a lower baffle; 302. a second axle seat; 303. a second connection block; 304. a second elastic ring.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1-2, when the classical single-layer threaded casing head is used, for example, the casing head of an oil production wellhead according to the present application, high-pressure fluid flows through the communication space formed between the surface casing 107 and the technical casing 111 and between the surface casing and the lateral casing 102 (i.e. during construction operations such as slurry supplementing, slurry monitoring and balance liquid filling), so that the high-pressure environment can form an impact effect on the hanger 110, and after long-term use, the tightness between the hanger 110 and the technical casing 111 and between the hanger 110 and the casing head pipe body 101 can be damaged, so that leakage risks occur, and meanwhile, the fatigue degree of structural materials can be increased due to long-term impact, so that the service life is reduced.
For this reason, the present application provides the following examples to solve the above problems.
Examples: as shown in fig. 1-11, an embodiment of the present application provides an oil production wellhead casing head, which comprises a casing body assembly 1, wherein the casing body assembly 1 comprises a casing head pipe body 101, a surface casing 107 and a technical casing 111, the surface casing 107 is arranged inside a bottom end port of the casing head pipe body 101, an upper-layer anti-impact assembly 2 and a lower-layer anti-impact assembly 3 are sequentially arranged above the surface casing 107 in the casing head pipe body 101 from top to bottom, the outside of the technical casing 111 is inserted into the casing head pipe body 101 and is positioned inside the surface casing 107, and the outside of the technical casing 111 passes through the inside of the upper-layer anti-impact assembly 2 and the lower-layer anti-impact assembly 3.
Specifically, the middle part both sides of casing head body 101 all are provided with side mouth pipe 102, the outer port department of side mouth pipe 102 all installs flat valve 103, the top mouth externally mounted of casing head body 101 has flange 104, the inside week of flange 104 is provided with a plurality of notes fat hole 105 and the inside of annotating fat hole 105 all is linked together with the inside of casing head body 101, the inside all threaded connection of annotating fat hole 105 has shutoff bolt 106, the top mouth outside threaded connection of top layer sleeve pipe 107 is inside the bottom mouth of casing head body 101, the bottom mouth inside of casing head body 101 is located the top of top layer sleeve pipe 107 and has inlayed sealing washer 108, the inside of casing head body 101 is located the top of upper shock-proof subassembly 2 and is provided with boss 109, the big bottom mouth of top mouth of boss 109 is little back taper table form, the outside of technical sleeve 111 is nested with hanger 110, the outside of hanger 110 is inlayed in the inside of casing head body 101 and the bottom of hanger 110 is hugged closely the cooperation at the top of boss 109.
Specifically, in order to form a protective blocking effect between the high-pressure environment and the hanger 110, the lower-layer anti-impact assembly 3 includes a plurality of lower-layer baffle plates 301 and a second elastic ring 304, the lower-layer baffle plates 301 are surrounded to form another bottomless bowl-shaped structure and are tightly matched with the outside of the technical sleeve 111 from the bottom end opening of the other bottomless bowl-shaped structure, the adjacent lower-layer baffle plates 301 are tightly matched with each other, the top upper side of the lower-layer baffle plates 301 is provided with a second shaft seat 302, the inside of the second shaft seat 302 is provided with another rotating shaft, two ends of the other rotating shaft are respectively and rotatably connected with another mounting seat, the outer sides of the other mounting seats are respectively and correspondingly mounted on the inner wall of the sleeve head pipe body 101, the lower sides of the top parts of the lower-layer baffle plates 301 are respectively provided with a second connecting block 303, and the second connecting blocks 303 are alternately connected through the second elastic ring 304.
The second connection block 303 can be pulled to retract towards the center of the second elastic ring 304 through the elastic contraction effect of the second elastic ring 304, and as the lower-layer baffle 301 can deflect up and down in the casing head pipe body 101, the second connection block 303 can drive the lower-layer baffle 301 to retract towards the center of the second elastic ring 304 from the bottom of the second connection block, and the bottom of the lower-layer baffle 301 can be attached to the outer side of the technical casing 111, so that a barrier can be formed between the hanger 110 and the high-pressure environment by utilizing the sealing effect among the plurality of lower-layer baffles 301, the purpose of forming an impact effect on the hanger 110 by blocking the high-pressure environment is finally realized, and the effects of protecting structural strength and guaranteeing tightness are achieved.
Further, in order to enhance the blocking effect of the lower layer anti-impact assembly 3, an upper layer anti-impact assembly 2 is further added above the lower layer anti-impact assembly 3, the upper layer anti-impact assembly 2 comprises a plurality of upper layer baffle plates 201 and a first elastic ring 204, a bottomless bowl-shaped structure is formed by encircling the upper layer baffle plates 201 and is tightly matched with the outside of the technical sleeve 111 from the bottom end opening of the bottomless bowl-shaped structure, the adjacent upper layer baffle plates 201 are tightly matched with each other, the upper side of the bottom of the upper layer baffle plates 201 is provided with a first shaft seat 202, a rotating shaft is arranged in the first shaft seat 202, two ends of the rotating shaft are respectively and rotatably connected with a mounting seat, the outer sides of the mounting seats are respectively and correspondingly arranged on the inner wall of the casing head pipe body 101, the lower sides of the bottom of the upper layer baffle plates 201 are respectively provided with a first connecting block 203, the first connecting blocks 203 are connected with each other by the first elastic ring 204 in an interpenetration manner, and the joints between the adjacent upper layer baffle plates 201 and the adjacent lower layer baffle plates 301 are alternately arranged.
The above-mentioned elasticity shrink effect through first elastic ring 204 can draw first connecting block 203 to the center of first elastic ring 204 in, because upper strata separation blade 201 also can deflect from top to bottom in the inside of casing head body 101, and then first connecting block 203 can drive upper strata separation blade 201 and draw in from its bottom to the center of first elastic ring 204, and then the bottom of upper strata separation blade 201 can laminate in the outside of technical sleeve 111, thereby utilize the sealed effect between a plurality of upper strata separation blade 201, can form the separation again between hanger 110 and lower floor anti-shock subassembly 3, and the junction between adjacent upper strata separation blade 201 and the adjacent lower floor separation blade 301 is crisscross to be set up, finally realized strengthening the purpose that separation high pressure environment forms the impact effect to hanger 110, make this well head casing head sealed result of use better, the life-span is longer.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an oil recovery well head casing head, includes body subassembly (1), its characterized in that: the pipe body assembly (1) comprises a casing head pipe body (101), a surface casing (107) and a technical casing (111), wherein the surface casing (107) is arranged inside a bottom end opening of the casing head pipe body (101), an upper-layer anti-impact assembly (2) and a lower-layer anti-impact assembly (3) are sequentially arranged above the surface casing (107) from top to bottom in the casing head pipe body (101), the outside of the technical casing (111) is inserted into the casing head pipe body (101) and is positioned inside the surface casing (107), and the outside of the technical casing (111) passes through the upper-layer anti-impact assembly (2) and the lower-layer anti-impact assembly (3);
the upper-layer anti-collision assembly (2) comprises a plurality of upper-layer baffle plates (201) and a first elastic ring (204), wherein a bottomless bowl-shaped structure is formed by encircling the upper-layer baffle plates (201) and is tightly matched with the outside of the technical sleeve (111) from the bottom end opening of the bottomless bowl-shaped structure, the adjacent upper-layer baffle plates (201) are tightly matched with each other, a first shaft seat (202) is arranged on the upper side of the bottom of the upper-layer baffle plates (201), a rotating shaft is arranged in the first shaft seat (202), two ends of the rotating shaft are respectively and rotatably connected with a mounting seat, the outer sides of the mounting seats are respectively and correspondingly arranged on the inner wall of the sleeve head pipe body (101), and first connecting blocks (203) are respectively arranged on the lower sides of the bottom of the upper-layer baffle plates (201) and are connected with each other in an inserted manner through the first elastic ring (204);
the lower-layer anti-collision assembly (3) comprises a plurality of lower-layer baffle plates (301) and a second elastic ring (304), wherein a plurality of lower-layer baffle plates (301) are surrounded to form another bottomless bowl-shaped structure and are tightly matched with the outside of the technical sleeve (111) from the bottom end opening of the other bottomless bowl-shaped structure, the adjacent lower-layer baffle plates (301) are tightly matched with each other, a second shaft seat (302) is arranged on the upper side of the top of each lower-layer baffle plate (301), another rotating shaft is arranged in each second shaft seat (302), two ends of each other rotating shaft are respectively connected with another mounting seat in a rotating mode, the outer sides of the other mounting seats are respectively correspondingly arranged on the inner wall of the sleeve head pipe body (101), second connecting blocks (303) are respectively arranged on the lower side of the top of each lower-layer baffle plate (301), and the second connecting blocks (303) are alternately connected through the second elastic ring (304).
The joint between the adjacent upper-layer baffle plates (201) and the joint between the adjacent lower-layer baffle plates (301) are arranged in a staggered mode.
2. The wellhead casing head of claim 1, wherein: the casing head is characterized in that side port pipes (102) are arranged on two sides of the middle of the casing head pipe body (101), and flat valves (103) are arranged at outer ports of the side port pipes (102).
3. The wellhead casing head of claim 1, wherein: an upper connecting flange (104) is arranged outside the top end opening of the casing head pipe body (101).
4. A wellhead casing head according to claim 3, wherein: the inside week of going up flange (104) is provided with a plurality of notes fat hole (105) just the inside of annotating fat hole (105) all is linked together with the inside of casing head body (101), the inside all threaded connection of annotating fat hole (105) has shutoff bolt (106).
5. The wellhead casing head of claim 1, wherein: the top end opening of the surface layer sleeve (107) is externally connected with the bottom end opening of the sleeve head pipe body (101) in a threaded mode, and a sealing ring (108) is embedded in the top end opening of the surface layer sleeve (107) in the sleeve head pipe body (101).
6. The wellhead casing head of claim 1, wherein: the inside that is located casing head body (101) is provided with boss (109) in the top of upper strata scour protection subassembly (2), the big end port of top of boss (109) is little back taper platform form, the outside nestification of technical sleeve (111) has hanger (110), the outside of hanger (110) is inlayed in the inside of casing head body (101) just the cooperation is hugged closely at the top of boss (109) in the bottom of hanger (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311018014.1A CN116733409B (en) | 2023-08-14 | 2023-08-14 | Oil recovery well head casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311018014.1A CN116733409B (en) | 2023-08-14 | 2023-08-14 | Oil recovery well head casing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116733409A true CN116733409A (en) | 2023-09-12 |
| CN116733409B CN116733409B (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311018014.1A Active CN116733409B (en) | 2023-08-14 | 2023-08-14 | Oil recovery well head casing head |
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| CN (1) | CN116733409B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117166955A (en) * | 2023-10-31 | 2023-12-05 | 大庆鑫得丰石油技术有限公司 | Casing head and oil gas wellhead integrated device |
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