CN116335569A - High-pressure metal sealing combination of hanger body applied to complex working condition - Google Patents
High-pressure metal sealing combination of hanger body applied to complex working condition Download PDFInfo
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- CN116335569A CN116335569A CN202310478587.6A CN202310478587A CN116335569A CN 116335569 A CN116335569 A CN 116335569A CN 202310478587 A CN202310478587 A CN 202310478587A CN 116335569 A CN116335569 A CN 116335569A
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- 239000002184 metal Substances 0.000 title claims abstract description 74
- 238000007789 sealing Methods 0.000 title claims abstract description 74
- 230000014759 maintenance of location Effects 0.000 claims abstract description 31
- 230000005284 excitation Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 19
- 239000004519 grease Substances 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 14
- 208000034656 Contusions Diseases 0.000 claims description 12
- 208000034526 bruise Diseases 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 241000191291 Abies alba Species 0.000 claims description 4
- 235000014121 butter Nutrition 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 210000002445 nipple Anatomy 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a high-pressure metal sealing combination of a hanger body, which is applied to complex working conditions and comprises the hanger body, a supporting ring, an excitation ring, a metal ring, a sealing packet, a threaded ring, a retention structure, a retention inner hole, a hanger neck, a four-way structure and bolts, wherein the four-way structure is positioned at the top of the hanger body, the metal sealing combination structure is positioned at the outer side of the hanger body, and the metal sealing combination structure comprises the threaded ring, the sealing packet, the metal ring, the excitation ring and the supporting ring. The high-pressure metal sealing combination of the hanger body applied to the complex working condition can meet the sealing reliability under the condition that the highest pressure is 20000PSI, namely 140Mpa, through the design of the improved high-pressure metal sealing, meanwhile, the excitation operation is avoided after the hanger body is put into sealing, the on-site operation time is shortened, the efficiency is improved, the cost is reduced, and the sealing is realized after one-time putting into sealing.
Description
Technical Field
The invention relates to the field of petroleum exploitation equipment, in particular to a high-pressure metal sealing combination of a hanger body applied to complex working conditions.
Background
The high-pressure metal sealing combination of the hanger body is supporting equipment for petroleum exploitation operation, in the technical field of API6A, the sealing of various components plays a role as a core of wellhead equipment all the time, the quality of the sealing directly relates to the quality of the whole wellhead equipment, wherein the hanger is an important part of well completion, the sealing performance of the hanger is particularly important, and along with the continuous development of technology, the manufacturing process requirement of people on the high-pressure metal sealing combination of the hanger body is higher and higher.
The prior high-pressure metal sealing combination of the hanger body has certain defects when in use, at present, as the fracturing operation is popularized in international and domestic markets, the pressure of the fracturing operation tends to be increased, the sealing (rubber sealing and metal sealing) of the prior hanger is difficult to meet the fracturing operation requirement of higher pressure (20000 PSI and 145 MPa), and certain adverse effect is brought to the actual use process.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a high-pressure metal sealing combination of a hanger body, which is applied to complex working conditions, and through the design of the improved high-pressure metal sealing, the sealing reliability under the condition that the highest pressure is 20000PSI, namely 140Mpa can be met, meanwhile, the excitation operation is avoided in the traditional sense after the sealing is carried out, the on-site operation time is shortened, the efficiency is improved, the cost is reduced, the sealing is realized after the sealing is carried out once, and the problems in the background technology can be effectively solved.
(II) technical scheme
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a be applied to hanger body high pressure metal seal combination under complicated operating mode, includes hanger body, holding ring, excitation ring, metal ring, sealed package, screwed ring, location structure, location hole, hanger neck, cross structure and bolt, the cross structure location is in the top position of hanger body, metal seal combination structure location is in the outside position of hanger body, metal seal combination structure includes screwed ring, sealed package, metal ring, excitation ring and holding ring, the screwed ring is located sealed package upper end, the metal ring is located sealed package, the excitation ring is located sealed package's lower extreme, the holding ring is located the lower extreme of excitation ring.
As a preferable technical scheme of the four-way structure, the position of the upper periphery of the four-way structure is positioned through the retention structure and the retention inner hole, the hanger body is coaxial with the inner hole of the four-way structure, and the hanger body is positioned to the shoulder in the hole of the four-way structure.
As a preferable technical scheme of the application, the threaded ring, the sealing packet, the metal ring, the excitation ring and the supporting ring are sequentially installed and integrally positioned.
As a preferable technical scheme of the four-way structure, the four-way structure is provided with the backing ring groove, and the backing ring groove is internally positioned with the backing ring.
As a preferable technical scheme of the application, the annular space between the hanger body and the four-way structure is filled with test oil.
As a preferable technical scheme of this application, the structural location of cross is installed the bolt, the bolt on the cross structure is aimed at the screw downwards, and the cross structure bottom passes through the bolt location installation.
As a preferred technical solution of the present application, the method comprises the following steps of:
s1: according to the technical requirement of well depth, putting in oil/casing, when the oil/casing reaches the last end, using an elevator to sit on the upper end surface of the four-way joint, respectively coating butter on two ends of a double male pup joint prepared in advance, screwing into an oil/casing coupling and a screw thread at the lower part of a hanger, and using a large clamp to tighten the oil/casing coupling and the hanger to a specified torque;
s2: screwing the oil/casing pipe or the lifting nipple into an inner screw buckle at the upper end of the oil/casing pipe hanger to be tightened to a specified torque, lifting the hanger and then removing the lower pad elevator;
s3: the surface of the four-way inner hole is coated with grease on the premise of cleaning by flushing and cleaning with water, and the retention device on the upper periphery of the four-way is ensured to completely retract into the retention device hole;
s4: the method comprises the steps of sequentially installing a supporting ring, an excitation ring, a metal seal, a sealing packet and a threaded ring;
s5: on the premise of checking that the sealing surface of the hanger is free from bruise, scratch and rust, and coating the surface with grease;
s6: slowly lowering the hanger to the shoulder in the four-way hole on the premise of ensuring that the hanger and the four-way hole are coaxial;
s7: after confirming that the hanger is completely successfully seated and hung, respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, and requiring the retention devices to be uniformly stressed;
s8: lifting the upper flange Christmas tree vertically by a crane or connecting the upper part with the four-way part, cleaning and checking the sealing surface respectively, and coating grease on the surface on the premise of ensuring no bruise, scratch and rust;
s9: cleaning and checking the four-way upper end gasket groove and the upper flange lower end gasket groove respectively, and putting the cleaned gasket ring in the gasket groove after the grease is coated on the premise that the gasket grooves are free from bruise, scratch and rust;
s10: filling test oil into the annulus between the hanger and the four-way valve, so as to be beneficial to the subsequent pressure test work;
s11: aligning the screw holes of the upper flange or the upper four-way joint in a specified direction, ensuring that the penetrating bolts are vertically and flatly and slowly downwards screwed on nuts, checking gaps on four sides of the lower end of the upper flange or the upper four-way joint after loosening, and taking care of implementing symmetrical bolt tightening in place on the premise of ensuring equal gaps so as to prevent damage caused by the fact that the metal seal is pressed by a single side;
s12: tightening compression nuts on the connecting bolts by using a knocking spanner cross pair, so as to ensure that gaps on four sides between the connecting surfaces are necessarily equal;
s13: and respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, wherein the retention devices are required to be uniformly stressed, and the hanger and the metal sealing assembly of the body of the hanger are installed.
As a preferred technical scheme of the application, the method comprises the following testing steps: through the test of BOP or the pressure test mouth on upper portion of flange to the sealed effect of hanger body metal seal assembly, the pressure of beating is 20000PSI, namely 140Mpa, and dwell time is 15min, does not have obvious visible leakage or leak the volume and be less than 500PSI and pass through.
(III) beneficial effects
Compared with the prior art, the invention provides a high-pressure metal sealing combination of a hanger body applied to complex working conditions, which has the following beneficial effects: this be applied to hanger body high pressure metal seal combination under complicated operating mode, through the design of high pressure metal seal after this kind of improvement, can satisfy the highest pressure and be 20000PSI, namely the reliability of sealing under the 140Mpa condition, on the traditional sense has been avoided simultaneously, still need to excite the operation after going into the seal, the operating time of scene has been reduced, the efficiency has been improved and the cost has been reduced simultaneously, realize really once going into and realize sealing, whole hanger body high pressure metal seal integrated configuration is simple, convenient operation, the effect of use is better for traditional mode.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a high-pressure metal seal assembly for a hanger body applied to complex working conditions.
Fig. 2 is a schematic view of a conventional hanger body metal seal assembly activated by a retention device.
Fig. 3 is a schematic diagram of a conventional hanger body metal seal assembly activated by BOP pressing.
In the figure: 1. a hanger body; 2. a support ring; 3. an excitation ring; 4. a metal ring; 5. sealing the packet; 6. a threaded ring; 7. a retention structure; 8. a retention bore; 9. a hanger neck; 10. a four-way structure; 11. a bolt; 12. a metal sealing combined structure.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative of the present invention only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-3, a high-pressure metal sealing combination of a hanger body applied to complex working conditions comprises a hanger body 1, a supporting ring 2, an exciting ring 3, a metal ring 4, a sealing packet 5, a threaded ring 6, a retention structure 7, a retention inner hole 8, a hanger neck 9, a four-way structure 10 and a bolt 11, wherein the four-way structure 10 is positioned at the top position of the hanger body 1, the metal sealing combination structure 12 is positioned at the outer side position of the hanger body 1, the metal sealing combination structure 12 comprises the threaded ring 6, the sealing packet 5, the metal ring 4, the exciting ring 3 and the supporting ring 2, the threaded ring 6 is positioned at the upper end of the sealing packet 5, the metal ring 4 is positioned in the sealing packet 5, the exciting ring 3 is positioned at the lower end of the sealing packet 5, and the supporting ring 2 is positioned at the lower end of the exciting ring 3.
Further, the position of the upper periphery of the four-way structure 10 is positioned through the retaining structure 7 and the retaining inner hole 8, the hanger body 1 is coaxial with the inner hole of the four-way structure 10, and the hanger body 1 is positioned to the shoulder in the hole of the four-way structure 10.
Further, the threaded ring 6, the sealing bag 5, the metal ring 4, the excitation ring 3 and the support ring 2 are sequentially installed and integrally positioned.
Further, a gasket groove is formed on the four-way structure 10, and a gasket is positioned inside the gasket groove.
Further, the annular space between the hanger body 1 and the four-way structure 10 is filled with test oil.
Further, a bolt 11 is positioned and installed on the four-way structure 10, the bolt 11 on the four-way structure 10 is aligned with the screw hole downwards, and the bottom of the four-way structure 10 is positioned and installed through the bolt 11.
Further, the method comprises the following steps of:
s1: according to the technical requirement of well depth, putting in oil/casing, when the oil/casing reaches the last end, using an elevator to sit on the upper end surface of the four-way joint, respectively coating butter on two ends of a double male pup joint prepared in advance, screwing into an oil/casing coupling and a screw thread at the lower part of a hanger, and using a large clamp to tighten the oil/casing coupling and the hanger to a specified torque;
s2: screwing the oil/casing pipe or the lifting nipple into an inner screw buckle at the upper end of the oil/casing pipe hanger to be tightened to a specified torque, lifting the hanger and then removing the lower pad elevator;
s3: the surface of the four-way inner hole is coated with grease on the premise of cleaning by flushing and cleaning with water, and the retention device on the upper periphery of the four-way is ensured to completely retract into the retention device hole;
s4: the method comprises the steps of sequentially installing a supporting ring, an excitation ring, a metal seal, a sealing packet and a threaded ring;
s5: on the premise of checking that the sealing surface of the hanger is free from bruise, scratch and rust, and coating the surface with grease;
s6: slowly lowering the hanger to the shoulder in the four-way hole on the premise of ensuring that the hanger and the four-way hole are coaxial;
s7: after confirming that the hanger is completely successfully seated and hung, respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, and requiring the retention devices to be uniformly stressed;
s8: lifting the upper flange Christmas tree vertically by a crane or connecting the upper part with the four-way part, cleaning and checking the sealing surface respectively, and coating grease on the surface on the premise of ensuring no bruise, scratch and rust;
s9: cleaning and checking the four-way upper end gasket groove and the upper flange lower end gasket groove respectively, and putting the cleaned gasket ring in the gasket groove after the grease is coated on the premise that the gasket grooves are free from bruise, scratch and rust;
s10: filling test oil into the annulus between the hanger and the four-way valve, so as to be beneficial to the subsequent pressure test work;
s11: aligning the screw holes of the upper flange or the upper four-way joint in a specified direction, ensuring that the penetrating bolts are vertically and flatly and slowly downwards screwed on nuts, checking gaps on four sides of the lower end of the upper flange or the upper four-way joint after loosening, and taking care of implementing symmetrical bolt tightening in place on the premise of ensuring equal gaps so as to prevent damage caused by the fact that the metal seal is pressed by a single side;
s12: tightening compression nuts on the connecting bolts by using a knocking spanner cross pair, so as to ensure that gaps on four sides between the connecting surfaces are necessarily equal;
s13: and respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, wherein the retention devices are required to be uniformly stressed, and the hanger and the metal sealing assembly of the body of the hanger are installed.
Further, the method steps comprising the following tests: through the test of BOP or the pressure test mouth on upper portion of flange to the sealed effect of hanger body metal seal assembly, the pressure of beating is 20000PSI, namely 140Mpa, and dwell time is 15min, does not have obvious visible leakage or leak the volume and be less than 500PSI and pass through.
Comparative example:
the scheme and the structural principle diagram are shown in fig. 1, 2 and 3, wherein fig. 2 and 3 are analysis of the conventional common seal, and fig. 1 is a design structure after improvement of the patent.
As shown in fig. 2 and 3, the conventional hanger body metal seal is usually activated by a retention device at the upper part of the hanger or activated by BOP pressing, and both of these two structural forms have respective disadvantages. The metal seal excited by the retention device is influenced by subjective factors of manual operation, and the condition of uneven stress exists in the process of implementing specific operation, so that the seal is easy to fail; the metal seal excited by BOP pressurizing is easy to be pressurized under individual extreme conditions because the on-site BOP pressurizing pressure cannot be accurately controlled in the operation process, so that the seal is invalid.
As shown in fig. 1, the present patent combines the two conditions, redesigns and optimizes them, and develops a sealing combination which can realize effective high-pressure sealing through the dead weight of oil/sleeve.
Working principle: the invention comprises a hanger body 1, a supporting ring 2, an excitation ring 3, a metal ring 4, a sealing packet 5, a threaded ring 6, a retention structure 7, a retention inner hole 8, a hanger neck 9, a four-way structure 10, a bolt 11 and a metal sealing combined structure 12, through the design of the improved high-pressure metal seal, the sealing reliability under the condition that the highest pressure is 20000PSI, namely 140Mpa can be met, the excitation operation is avoided in the traditional sense, the field operation time is reduced, the efficiency is improved, the cost is reduced, the sealing is realized by actually realizing one-time insertion, the oil/sleeve is put in according to the technical requirement of the well depth, when the last one-time insertion is realized, the elevator is used for sitting on the upper end face of the four-way, the two ends of the prepared double male pup joint are respectively coated with butter and screwed into the oil/sleeve coupling and the screw thread at the lower part of the hanger, tightening the hanger to a specified torque by using a large clamp, tightening the hanger to the specified torque by using an inner thread button at the upper end of an oil/sleeve or a lifting nipple, removing a lower pad elevator after lifting the hanger, flushing and wiping an inner hole of the four-way joint with water to clean the inner hole, applying grease on the surface, ensuring that a retaining device at the upper periphery of the four-way joint is completely retracted into the hole of the retaining device, sequentially installing a supporting ring, exciting the ring, sealing a metal seal, sealing a packet, screwing the ring, checking the sealing surface of the hanger without bruising, scratching and rusting, applying grease on the surface, slowly lowering the hanger to the shoulder in the inner hole of the four-way joint on the premise of ensuring that the hanger and the inner hole of the four-way joint are coaxial, respectively symmetrically tightening the retaining devices on the outer circumference of the upper end of the four-way joint after confirming that the hanger is completely successfully seated, requiring uniform stress of the retaining device, the method comprises the steps of vertically lifting an upper flange christmas tree or an upper connecting four-way part by a crane, respectively cleaning and checking sealing surfaces, coating grease on the surfaces on the premise of ensuring no bruise, scratch and rust, respectively cleaning and checking four-way upper end pad ring grooves, and on the premise of ensuring no bruise, scratch and rust, after coating grease, putting the cleaned pad ring in the pad ring grooves, filling test oil in an annulus between a hanger and the four-way part, so as to be beneficial to the subsequent pressure test work, downwards aligning screw holes on the upper flange or the upper four-way part according to a specified direction, ensuring that bolts are screwed on nuts in a vertically flat and slow way, checking gaps on four edges of the lower end of the upper flange or the upper four-way part after the loose hanging, taking the symmetric tightening bolts into place on the premise of ensuring equal gaps, preventing the metal seal from being damaged by being pressed, tightly tightening the compression nuts on the connecting bolts on the edges of the four-way part by the single-sided wrench, ensuring that the gaps on four edges are equal, respectively implementing the fixing device on the outer circumferences of the upper end, respectively tightening device, respectively, and requiring the uniform fixing device on the outer circumferences of the upper end and the hanger and the metal sealing assembly.
It should be noted that in this document, relational terms such as first and second (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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (8)
1. The utility model provides a be applied to hanger body high pressure metal seal combination under complicated operating mode, includes hanger body (1), support ring (2), excitation ring (3), metal ring (4), sealed package (5), screwed ring (6), location structure (7), location hole (8), hanger neck portion (9), cross structure (10) and bolt (11), its characterized in that: the four-way structure (10) is positioned at the top of the hanger body (1), the metal sealing combined structure (12) is positioned at the outer side of the hanger body (1), the metal sealing combined structure (12) comprises a threaded ring (6), a sealing bag (5), a metal ring (4), an excitation ring (3) and a supporting ring (2), the threaded ring (6) is positioned at the upper end of the sealing bag (5), the metal ring (4) is positioned in the sealing bag (5), the excitation ring (3) is positioned at the lower end of the sealing bag (5), and the supporting ring (2) is positioned at the lower end of the excitation ring (3).
2. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: the position of the upper periphery of the four-way structure (10) is positioned through the retaining structure (7) and the retaining inner hole (8), the hanger body (1) is coaxial with the inner hole of the four-way structure (10), and the hanger body (1) is positioned to the shoulder in the hole of the four-way structure (10).
3. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: the screw thread ring (6), the sealing bag (5), the metal ring (4), the excitation ring (3) and the support ring (2) are sequentially installed and integrally positioned.
4. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: and a backing ring groove is formed in the four-way structure (10), and a backing ring is positioned in the backing ring groove.
5. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: and the annular space between the hanger body (1) and the four-way structure (10) is filled with test oil.
6. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: the four-way structure (10) is provided with bolts (11) in a positioning mode, the bolts (11) on the four-way structure (10) are downwards aligned with the screw holes, and the bottoms of the four-way structure (10) are provided with bolts (11) in a positioning mode.
7. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: the method comprises the following steps of:
s1: according to the technical requirement of well depth, putting in oil/casing, when the oil/casing reaches the last end, using an elevator to sit on the upper end surface of the four-way joint, respectively coating butter on two ends of a double male pup joint prepared in advance, screwing into an oil/casing coupling and a screw thread at the lower part of a hanger, and using a large clamp to tighten the oil/casing coupling and the hanger to a specified torque;
s2: screwing the oil/casing pipe or the lifting nipple into an inner screw buckle at the upper end of the oil/casing pipe hanger to be tightened to a specified torque, lifting the hanger and then removing the lower pad elevator;
s3: the surface of the four-way inner hole is coated with grease on the premise of cleaning by flushing and cleaning with water, and the retention device on the upper periphery of the four-way is ensured to completely retract into the retention device hole;
s4: the method comprises the steps of sequentially installing a supporting ring, an excitation ring, a metal seal, a sealing packet and a threaded ring;
s5: on the premise of checking that the sealing surface of the hanger is free from bruise, scratch and rust, and coating the surface with grease;
s6: slowly lowering the hanger to the shoulder in the four-way hole on the premise of ensuring that the hanger and the four-way hole are coaxial;
s7: after confirming that the hanger is completely successfully seated and hung, respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, and requiring the retention devices to be uniformly stressed;
s8: lifting the upper flange Christmas tree vertically by a crane or connecting the upper part with the four-way part, cleaning and checking the sealing surface respectively, and coating grease on the surface on the premise of ensuring no bruise, scratch and rust;
s9: cleaning and checking the four-way upper end gasket groove and the upper flange lower end gasket groove respectively, and putting the cleaned gasket ring in the gasket groove after the grease is coated on the premise that the gasket grooves are free from bruise, scratch and rust;
s10: filling test oil into the annulus between the hanger and the four-way valve, so as to be beneficial to the subsequent pressure test work;
s11: aligning the screw holes of the upper flange or the upper four-way joint in a specified direction, ensuring that the penetrating bolts are vertically and flatly and slowly downwards screwed on nuts, checking gaps on four sides of the lower end of the upper flange or the upper four-way joint after loosening, and taking care of implementing symmetrical bolt tightening in place on the premise of ensuring equal gaps so as to prevent damage caused by the fact that the metal seal is pressed by a single side;
s12: tightening compression nuts on the connecting bolts by using a knocking spanner cross pair, so as to ensure that gaps on four sides between the connecting surfaces are necessarily equal;
s13: and respectively symmetrically tightening the retention devices on the outer circumference of the upper end of the four-way joint, wherein the retention devices are required to be uniformly stressed, and the hanger and the metal sealing assembly of the body of the hanger are installed.
8. The high-pressure metal seal assembly for a hanger body under complex operating conditions of claim 1, wherein: the method comprises the following steps: through the test of BOP or the pressure test mouth on upper portion of flange to the sealed effect of hanger body metal seal assembly, the pressure of beating is 20000PSI, namely 140Mpa, and dwell time is 15min, does not have obvious visible leakage or leak the volume and be less than 500PSI and pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478587.6A CN116335569A (en) | 2023-04-28 | 2023-04-28 | High-pressure metal sealing combination of hanger body applied to complex working condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478587.6A CN116335569A (en) | 2023-04-28 | 2023-04-28 | High-pressure metal sealing combination of hanger body applied to complex working condition |
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| Publication Number | Publication Date |
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| CN116335569A true CN116335569A (en) | 2023-06-27 |
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| CN202310478587.6A Pending CN116335569A (en) | 2023-04-28 | 2023-04-28 | High-pressure metal sealing combination of hanger body applied to complex working condition |
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| Country | Link |
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| CN (1) | CN116335569A (en) |
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