CN112832748A - Pressure test device of casing hanger - Google Patents
Pressure test device of casing hanger Download PDFInfo
- Publication number
- CN112832748A CN112832748A CN202011594683.XA CN202011594683A CN112832748A CN 112832748 A CN112832748 A CN 112832748A CN 202011594683 A CN202011594683 A CN 202011594683A CN 112832748 A CN112832748 A CN 112832748A
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- China
- Prior art keywords
- casing hanger
- test
- cavity
- ring
- pressure test
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
Abstract
The invention relates to a pressure test device of a casing hanger, which comprises: a body having a test cavity therein; a grommet for carrying a casing hanger, seated at the bottom of the test chamber; the test pile is used for forming a sealed cavity with the casing hanger, is arranged in the test cavity and is positioned above the backing ring, and is provided with a pressing hole which is used for pressing a medium into the sealed cavity. According to the pressure test device for the casing hanger, provided by the invention, before the casing hanger leaves a factory, the pressure-bearing integrity of the casing hanger can be verified through the pressure test device, the reliability of the casing hanger during use is ensured, the pressure test device can be suitable for casing hangers of different specifications, the cost is effectively reduced, and the pressure test device can be repeatedly used.
Description
Technical Field
The invention relates to the technical field of offshore oil production equipment, in particular to a pressure test device for a casing hanger.
Background
With the exploration, development and exhaustion of land petroleum and natural gas resources, the development of oil and gas resources to the ocean and even deep sea becomes a necessary trend, and the development of deep sea petroleum equipment is imperative.
In the related technology, the underwater wellhead is the foundation of an underwater production system for ocean oil and gas exploitation, the underwater wellhead is a multi-layer pipe system consisting of a guide pipe and layers of sleeves, a sleeve hanger is arranged inside the wellhead and used for supporting a casing string and forming annular sealing by matching with an annular sealing assembly, and the underwater wellhead bears the self-weight load of the casing string and the internal pressure load generated by an oil and gas field in the drilling and oil and gas production processes and is a key component in the underwater wellhead production system. However, after the casing hanger is formed, the pressure-bearing capacity may be insufficient, and the reliability of the casing hanger during use may not be ensured.
Therefore, it is necessary to design a pressure test device for a casing hanger to realize a pressure bearing performance test of the casing hanger.
Disclosure of Invention
The embodiment of the invention provides a pressure test device for a casing hanger, which aims to solve the problems that in the related art, the casing hanger possibly has insufficient pressure bearing capacity after being machined and formed, and the reliability of the casing hanger in the use period cannot be guaranteed.
In a first aspect, a pressure test apparatus for a casing hanger is provided, comprising: a body having a test cavity therein; a grommet for carrying a casing hanger, seated at the bottom of the test chamber; the test pile is used for forming a sealed cavity with the casing hanger, is arranged in the test cavity and is positioned above the backing ring, and is provided with a pressing hole which is used for pressing a medium into the sealed cavity.
In some embodiments, the body has a bearing step at the bottom of the test chamber, and the backing ring is supported on the bearing step.
In some embodiments, the upper surface of the bearing step is an inclined surface.
In some embodiments, the grommet has a first ramp on its upper portion for engaging and carrying the casing hanger with its middle portion.
In some embodiments, the grommet further has a second inclined surface spaced inwardly from the first inclined surface for guiding the casing hanger.
In some embodiments, the test cavity has a threaded surface at the top thereof, and the pressure test device further includes a threaded compression ring, wherein the threaded compression ring is in threaded fit with the threaded surface, and abuts against the top of the test pile to limit axial movement of the test pile.
In some embodiments, the test pile has a third ramp on its upper portion for engaging the top of the casing hanger and holding it down.
In some embodiments, the outer side of the test pile is further provided with an upper sealing ring and a lower sealing ring which are arranged at intervals, and the upper sealing ring and the lower sealing ring are jointly used for forming the sealing cavity with the casing hanger.
In some embodiments, the test pile is further provided with an injection channel, one end of the injection channel is communicated with the pressing hole, the other end of the injection channel is used for communicating with the sealing cavity, and the other end of the injection channel is located close to the upper sealing ring; the test pile is further provided with an exhaust hole and an exhaust channel, one end of the exhaust channel is communicated with the exhaust hole, the other end of the exhaust channel is used for communicating the sealing cavity, and the other end of the exhaust channel is located close to the upper sealing ring.
In some embodiments, the backing ring is provided with a threaded lifting hole through its wall thickness.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a pressure test device of a casing hanger, which is characterized in that the pressure test device is provided with a backing ring positioned at the bottom of a test cavity, the backing ring can support the casing hanger at the bottom of the test cavity, the pressure test device is also provided with a test pile positioned in the test cavity, the test pile and the casing hanger can form a sealed cavity, a pressing hole is also arranged on the test pile, a medium can be pressed into the sealed cavity through the pressing hole, so that the bearing performance of the casing hanger can be tested, meanwhile, different backing rings and test piles are replaced in a body, the performance test of the casing hangers with different specifications can be realized, therefore, the bearing integrity of the casing hanger can be verified through the pressure test device before the casing hanger leaves a factory, the reliability of the casing hanger during the use period is ensured, and the pressure test device can be suitable for the casing hangers with different specifications, effectively reduces the cost and can be repeatedly used.
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 description of the embodiments will be briefly introduced 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 creative efforts.
FIG. 1 is a schematic cross-sectional view of a pressure test apparatus for a casing hanger according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of another pressure testing apparatus for a casing hanger according to an embodiment of the present invention.
In the figure:
1. a body; 11. a test cavity; 12. a bearing step; 13. a thread face;
2. a backing ring; 21. a first inclined plane; 22. a second inclined plane; 24. a threaded hoisting hole;
3. testing the pile; 31. a third inclined plane; 32. punching a hole; 33. an injection channel; 34. an exhaust hole; 35. an exhaust passage;
4. a casing hanger; 41. a main body; 42. an upper sealing surface; 421. a first sealing surface; 422. a second sealing surface; 43. a lower sealing surface; 44. a first limiting surface; 45. a second limiting surface;
5. sealing the cavity;
6. a threaded compression ring;
7. an upper seal ring;
8. a lower sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a pressure test device for a casing hanger, which can solve the problems that in the related art, the casing hanger possibly has insufficient pressure bearing capacity after being machined and formed, and the reliability of the casing hanger in the use period cannot be guaranteed.
Referring to fig. 1 and 2, a pressure test apparatus for a casing hanger according to an embodiment of the present invention may include: a body 1, wherein the body 1 may have a hollow test cavity 11 therein; the backing ring 2 is used for bearing the casing hanger 4 and can be placed at the bottom of the test cavity 11 in a sitting mode, in the embodiment, the backing ring 2 is also of a hollow structure penetrating through the backing ring from top to bottom, and the bottom of the casing hanger 4 can be conveniently inserted into the backing ring 2; a test pile 3 for forming sealed chamber 5 with casing hanger 4, it locates in experimental cavity 11, and is located the top of backing ring 2, and the top of test pile 3 can have a hole 32 of suppressing, and the hole 32 of suppressing is used for suppressing the medium in the sealed chamber 5 that casing hanger 4 and test pile 3 formed to test casing hanger 4's pressure-bearing performance.
Referring to fig. 1, in some embodiments, the body 1 may have a bearing step 12, and the bearing step 12 may be located at the bottom of the test cavity 11, so that the bearing step 12 protrudes out of the inner wall surface of the test cavity 11, and the backing ring 2 may be supported on the bearing step 12, so that the backing ring 2 is located in the test cavity 11.
Referring to fig. 1, in some alternative embodiments, the backing ring 2 may have a first inclined surface 21 on its upper portion, the first inclined surface 21 may be located on the inner side of the backing ring 2 and extend obliquely downward, the first inclined surface 21 may be used to fit with the middle of the casing hanger 4 and function as a load-bearing casing hanger 4, in this embodiment, the first inclined surface 21 is located on the top of the backing ring 2, or in the middle of the backing ring 2, because the first inclined surface 21 fits in the middle of the casing hanger 4, so that the backing ring 2 supports the casing hanger 4 in the middle of the casing hanger 4, which is convenient for maintaining the stability of the casing hanger 4, and the bottom of the casing hanger 4 may also extend into the backing ring 2, so that the backing ring 2 further limits the casing.
Referring to fig. 1 and 2, in some embodiments, the backing ring 2 may further have a second inclined surface 22, and the second inclined surface 22 may also be located on the inner side of the backing ring 2 and spaced apart from the first inclined surface 21, in this embodiment, the second inclined surface 22 may be inclined in the same direction as the first inclined surface 21, and after the casing hanger 4 is mounted on the backing ring 2, the second inclined surface 22 may have a gap with the casing hanger 4, in other embodiments, the second inclined surface 22 may also abut against the casing hanger 4, and the second inclined surface 22 may be used for guiding the casing hanger 4 during the installation of the casing hanger 4 into the backing ring 2.
Referring to fig. 1, further, for the convenience of hoisting, the backing ring 2 may be provided with a threaded hoisting hole 24 penetrating through the wall thickness thereof, and the test pile 3 may also be provided with at least two hoisting holes.
Referring to fig. 1, in some embodiments, the test cavity 11 may have a threaded surface 13 located at the top thereof, that is, the inner wall surface of the top of the test cavity 11 is the threaded surface 13, the pressure testing apparatus may further include a threaded press ring 6, and the outer surface of the threaded press ring 6 may have an external thread, so that the threaded press ring 6 may be in threaded fit with the threaded surface 13 of the test cavity 11, and thus the threaded press ring 6 is assembled at the top of the test pile 3, so that the threaded press ring 6 abuts against the top of the test pile 3, and the test pile 3 is prevented from axially shifting in the testing process.
As shown in fig. 2, further, 4 hoisting holes can be respectively designed on the upper end surface and the lower end surface of the threaded compression ring 6, so that hoisting and thread screwing are facilitated.
Referring to fig. 1 and 2, in some embodiments, the outer side of the test pile 3 may be further provided with an upper sealing ring 7 and a lower sealing ring 8 which are arranged at intervals, wherein, the upper sealing ring 7 is arranged at the upper part of the testing pile 3, the lower sealing ring 8 is arranged at the lower part of the testing pile 3, the upper sealing ring 7 is clamped between the casing hanger 4 and the testing pile 3 to seal the top of the sealing cavity 5, the upper sealing ring 7 is also clamped between the casing hanger 4 and the testing pile 3 to seal the bottom of the sealing cavity 5, so that the upper sealing ring 7 and the lower sealing ring 8 together with the casing hanger 4 form a sealing cavity 5, and in order to achieve a better sealing effect, in the present embodiment, the lower part of the test pile 3 is provided with two lower sealing rings 8, the upper part of the test pile 3 can be provided with an upper sealing ring 7, two upper sealing rings 7 may also be provided in case the upper sealing surface of the casing hanger 4 is long.
Referring to fig. 1 and 2, in some alternative embodiments, test pile 3 may have a third ramp 31 located at its upper portion, third ramp 31 may be used to engage the top of casing hanger 4 and hold casing hanger 4 down, preventing casing hanger 4 from moving upward and may position upper seal ring 7, lower seal ring 8 and the inner sealing surface of casing hanger 4, and in other embodiments third ramp 31 may also be located biased towards the lower portion of test pile 3.
Referring to fig. 1, in some alternative embodiments, test pile 3 may further be provided with an injection passage 33 having one end communicating with ramming hole 32, the other end of injection passage 33 being used to communicate with seal cavity 5, and the other end of injection passage 33 may be located near upper seal ring 7, i.e. at the lower edge of upper seal ring 7; the test pile 3 can also be provided with an exhaust hole 34 and an exhaust channel 35 with one end communicated with the exhaust hole 34, the other end of the exhaust channel 35 is used for communicating the sealing cavity 5, and the other end of the exhaust channel 35 is also positioned close to the upper sealing ring 7, namely positioned at the lower edge of the upper sealing ring 7, the injection channel 33 and the exhaust channel 35 are both arranged at the lower edge of the upper sealing ring 7, so that the injection channel can be positioned at the uppermost edge of the sealing cavity 5, and when a medium is injected into the sealing cavity 5, the whole air in the sealing cavity 5 can be exhausted.
Referring to fig. 1, further, the casing hanger 4 may include a main body 41, and the main body 41 may also be a hollow structure, so that the testing pile 3 may be inserted into the main body 41 to form a sealing cavity 5 together with the main body 41, the main body 41 may have an upper sealing surface 42 located at an upper portion thereof, the upper sealing surface 42 may include a first sealing surface 421 and a second sealing surface 422 connected to the first sealing surface 421, wherein the first sealing surface 421 may be located above the second sealing surface 422, the first sealing surface 421 may be an inclined surface, the first sealing surface 421 is attached to the third inclined surface 31, the second sealing surface 422 may be a vertical surface, the second sealing surface 422 is attached to a vertical outer wall surface at an upper portion of the testing pile 3, and the upper sealing ring 7 may be located between the second sealing surface and the testing pile 3; main part 41 may also have lower sealing surface 43 located at its lower portion, lower sealing surface 43 may also be a vertical surface, and lower sealing surface 43 fits the outer vertical wall surface of the lower portion of test peg 3, and lower sealing ring 8 may be located between lower sealing surface 43 and test peg 3, so that sealing cavity 5 is formed between upper sealing surface 42 and lower sealing surface 43, and both upper sealing surface 42 and lower sealing surface 43 are located inside main part 41.
As shown in fig. 1, the main body 41 may further have a first limiting surface 44 located at an outer side thereof, and the first limiting surface 44 may have the same inclination angle as the first inclined surface 21, so that the first limiting surface 44 can completely fit the first inclined surface 21, and the casing hanger 4 is stably supported on the backing ring 2.
Referring to fig. 2, further, the main body 41 may further have a second limiting surface 45 located at an outer side thereof, the second limiting surface 45 may be disposed at an interval with the first limiting surface 44, and the second limiting surface 45 is correspondingly located above the second inclined surface 22.
In this embodiment, during testing, according to a designed rated pressure value, a liquid medium may be pressurized into the injection channel 33 through the pressurizing hole 32, so that the liquid medium flows into the sealed cavity 5 through the injection channel 33 and further enters the exhaust channel 35, after the liquid overflows from the exhaust hole 34, air in the sealed cavity 5 is exhausted, the exhaust hole 34 is blocked by a plug, and the liquid medium is continuously pressurized into the sealed cavity 5 to the rated pressure value, thereby completing a testing process; when the casing hanger 4 of different specifications needs to be aimed at, backing ring 2 and test pile 3 in test cavity 11 can be replaced by the type that matches casing hanger 4.
The principle of the pressure test device for the casing hanger provided by the embodiment of the invention is as follows:
because the pressure test device is provided with the backing ring 2 which is arranged at the bottom of the test cavity 11, the backing ring 2 can support the casing hanger 4 at the bottom of the test cavity 11, the pressure test device is also provided with the test pile 3 which is arranged in the test cavity 11, the test pile 3 and the casing hanger 4 can form a sealed cavity 5, and the test pile 3 is also provided with a pressing hole 32, a medium can be pressed into the sealed cavity 5 through the pressing hole 32, so as to test the bearing performance of the casing hanger 4, meanwhile, different backing rings 2 and test piles 3 are replaced in the body 1, so that the performance tests of the casing hangers 4 with different specifications can be realized, therefore, the integrity bearing pressure of the casing hanger 4 can be verified through the pressure test device before leaving factory, the reliability of the casing hanger 4 during use can be ensured, and the pressure test device can be suitable for the casing hangers 4 with different specifications, effectively reduces the cost and can be repeatedly used.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a pressure test device of casing hanger which characterized in that, it includes:
the device comprises a body (1), wherein a test cavity (11) is arranged in the body (1);
a grommet (2) for carrying a casing hanger (4) seated at the bottom of the test chamber (11);
the test pile (3) is used for forming a sealed cavity (5) with the casing hanger (4), is arranged in the test cavity (11) and is positioned above the backing ring (2), and is provided with a pressing hole (32), and the pressing hole (32) is used for pressing a medium into the sealed cavity (5).
2. The casing hanger pressure test apparatus of claim 1, wherein:
the body (1) is provided with a bearing step (12), the bearing step (12) is located at the bottom of the test cavity (11), and the backing ring (2) is supported on the bearing step (12).
3. The casing hanger pressure test apparatus of claim 2, wherein:
the upper surface of the bearing step (12) is an inclined surface.
4. The casing hanger pressure test apparatus of claim 1, wherein:
the backing ring (2) is provided with a first inclined surface (21) positioned on the upper portion of the backing ring, and the first inclined surface (21) is used for being attached to the middle of the casing hanger (4) and bearing the casing hanger (4).
5. The casing hanger pressure test apparatus of claim 4, wherein:
the backing ring (2) is further provided with a second inclined surface (22), the second inclined surface (22) is located on the inner side of the backing ring (2) and is arranged at intervals with the first inclined surface (21), and the second inclined surface (22) is used for guiding the casing hanger (4).
6. The casing hanger pressure test apparatus of claim 1, wherein:
the test cavity (11) is provided with a thread face (13) positioned at the top of the test cavity, the pressure test device further comprises a thread pressing ring (6), the thread pressing ring (6) is in thread fit with the thread face (13), and the thread pressing ring (6) is abutted to the top of the test pile (3) and used for limiting the axial movement of the test pile (3).
7. The casing hanger pressure test apparatus of claim 1, wherein:
the testing pile (3) is provided with a third inclined surface (31) positioned on the upper portion of the testing pile, and the third inclined surface (31) is used for being attached to the top of the casing hanger (4) and downwards abutting against the casing hanger (4).
8. The casing hanger pressure test apparatus of claim 1, wherein:
the outer side of the test pile (3) is further provided with an upper sealing ring (7) and a lower sealing ring (8) which are arranged at intervals, and the upper sealing ring (7) and the lower sealing ring (8) are jointly used for forming the sealing cavity (5) with the casing hanger (4).
9. The casing hanger pressure test apparatus of claim 8, wherein:
the test pile (3) is also provided with an injection channel (33) with one end communicated with the pressing hole (32), the other end of the injection channel (33) is used for communicating the sealing cavity (5), and the other end of the injection channel (33) is positioned close to the upper sealing ring (7);
the test pile (3) is further provided with an exhaust hole (34) and an exhaust channel (35) with one end communicated with the exhaust hole (34), the other end of the exhaust channel (35) is used for communicating with the sealing cavity (5), and the other end of the exhaust channel (35) is located close to the upper sealing ring (7).
10. The casing hanger pressure test apparatus of claim 1, wherein:
the backing ring (2) is provided with a threaded hoisting hole (24) penetrating through the wall thickness of the backing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594683.XA CN112832748A (en) | 2020-12-29 | 2020-12-29 | Pressure test device of casing hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594683.XA CN112832748A (en) | 2020-12-29 | 2020-12-29 | Pressure test device of casing hanger |
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| Publication Number | Publication Date |
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| CN112832748A true CN112832748A (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011594683.XA Pending CN112832748A (en) | 2020-12-29 | 2020-12-29 | Pressure test device of casing hanger |
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| CN (1) | CN112832748A (en) |
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| CN208870567U (en) * | 2018-09-29 | 2019-05-17 | 中国石油化工股份有限公司 | Blowout hookup is sealed between well head oil skill casing |
| WO2020139613A1 (en) * | 2018-12-27 | 2020-07-02 | Dril-Quip, Inc. | Tubing hanger with shiftable annulus seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201778732U (en) * | 2010-09-16 | 2011-03-30 | 宝鸡石油机械有限责任公司 | Oil pipe hanger for marine underwater upright oil production tree |
| CN201851065U (en) * | 2010-11-23 | 2011-06-01 | 上海美钻设备成套有限公司 | Annular pressure test plug for underwater wellhead |
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| WO2020139613A1 (en) * | 2018-12-27 | 2020-07-02 | Dril-Quip, Inc. | Tubing hanger with shiftable annulus seal |
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Effective date of registration: 20220906 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: SINOPEC OILFIELD EQUIPMENT Corp. Address before: 430000 No. 5 Huagongyuan Road, Miaoshan District, Donghu New Technology Development Zone, Wuhan City, Hubei Province Applicant before: KINGDREAM PLC Applicant before: SINOPEC OILFIELD EQUIPMENT Corp. |
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