CN114961643A - Recoverable pressure relief device and method for releasing annular trapped pressure of sleeve - Google Patents
Recoverable pressure relief device and method for releasing annular trapped pressure of sleeve Download PDFInfo
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- CN114961643A CN114961643A CN202210629564.6A CN202210629564A CN114961643A CN 114961643 A CN114961643 A CN 114961643A CN 202210629564 A CN202210629564 A CN 202210629564A CN 114961643 A CN114961643 A CN 114961643A
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a recoverable pressure relief device and a method for releasing annular entrapment pressure of a casing, wherein the device comprises a shell and at least one group of pressure relief components arranged on the shell, the shell comprises a first cylinder section, a second cylinder section and a third cylinder section which are sequentially connected and coaxially arranged, the inner diameters of the first cylinder section and the third cylinder section are smaller than that of the second cylinder section, and the first cylinder section and the third cylinder section are respectively in threaded connection with two casings in a casing of a deepwater oil and gas well, so that the shell is communicated with the inside of the casing of the deepwater oil and gas well; the pressure release subassembly can communicate annular ring encirclement and deep water oil gas well sheathed tube inside, makes annular ring encirclement pressure realize the pressure release to deep water oil gas well sheathed tube inside transmission, just the pressure release subassembly can reset after the pressure release, realizes recoverable formula pressure release. The invention can repeatedly control the annular confining pressure of the casing of the deepwater oil-gas well, ensure the safety of the well casing in the well completion exploitation process and effectively reduce the waste of manpower and material resources.
Description
Technical Field
The invention relates to the technical field of deepwater oil and gas field development, in particular to a recoverable pressure relief device and method for releasing annular confining pressure of a casing.
Background
Deepwater zones are important successor areas of global oil and gas resources, and over 70% of the global oil and gas resources are contained in oceans, of which 40% come from deepwater zones. However, deepwater oil and gas resources have complex geological structures, and the exploration and development process of the oil and gas resources generally faces a plurality of problems of high temperature, high pressure, low fracture pressure, narrow safety density window and the like, so that well cementation cement slurry cannot return to a wellhead generally, and a closed annulus is formed in a well section below a mud line. In the process of well completion, test and production, high-temperature fluid flowing from a well bottom to a well head conducts heat in the radial direction through a pipe column and annular fluid, the closed annular fluid is heated and expanded, the annular confining pressure is increased, the deepwater underwater well head cannot implement pressure relief operation, if the confining pressure exceeds the yield strength of a sleeve, the integrity of a shaft is damaged, and the safety of test and production of the deepwater oil and gas well is greatly threatened. At present, the technology of installing a rupture disc and sacrificing a casing pipe is mainly adopted in engineering to release annular confining pressure, but the technology is difficult to meet the requirement of releasing the annular confining pressure in the whole life cycle of a deepwater oil-gas well. Therefore, a pressure relief device and a method capable of effectively releasing annular confining pressure and serving in the whole life cycle development process of a deepwater oil and gas well are needed.
Disclosure of Invention
In view of the above problems, the present invention is directed to a recoverable pressure relief device and method for relieving the annulus trapping pressure of a casing.
The technical scheme of the invention is as follows:
on one hand, the recoverable pressure relief device for releasing the annular entrapment pressure of the casing comprises a casing and at least one group of pressure relief components arranged on the casing, wherein the casing comprises a first cylinder section, a second cylinder section and a third cylinder section which are sequentially connected and coaxially arranged, the inner diameters of the first cylinder section and the third cylinder section are smaller than that of the second cylinder section, and the first cylinder section and the third cylinder section are respectively in threaded connection with two casings in a deepwater oil and gas well casing, so that the casing is communicated with the interior of the deepwater oil and gas well casing; the pressure release subassembly can communicate annular ring encirclement and deep water sheathed tube inside, make annular ring encirclement pressure to deep water oil gas well sheathed tube inside transmission realizes the pressure release, just the pressure release subassembly can reset after the pressure release, realizes recoverable formula pressure release.
Preferably, the pressure relief assembly comprises a tool main body arranged along the outer surface of the shell in the axial direction, a main fluid channel I, a main fluid channel II, a main fluid channel III and a main fluid channel IV are arranged in the tool main body, a pressure relief control mechanism is arranged in the main fluid channel I, a piston I is arranged in the main fluid channel II, a piston II is arranged in the main fluid channel III, a pressure relief hole I and a pressure relief hole II are arranged on the tool main body, the pressure relief hole I is communicated with an annular hollow ring and the main fluid channel I, and the pressure relief hole II penetrates through the second cylindrical section to be communicated with the interior of the deep water oil and gas well casing and the main fluid channel IV;
the first main fluid channel longitudinally penetrates through the tool main body, a first plug is arranged at the top of the first main fluid channel, and a second plug is arranged at the bottom of the first main fluid channel;
the main fluid channel II is arranged on the upper portion of the left side of the main fluid channel I in parallel and communicated with the main fluid channel I through a connecting channel I, and the connecting channel I is positioned on the lower portion of the piston I;
the main fluid channel III is arranged on the lower portion of the right side of the main fluid channel I in parallel and is communicated with the main fluid channel I through a connecting channel II, the connecting channel II is located on the upper portion of the piston II, and a plug III is arranged at the bottom of the main fluid channel III;
the main fluid channel IV is arranged on the right side of the main fluid channel III in parallel, the lower part of the main fluid channel IV is communicated with the main fluid channel III through a connecting channel III, the connecting channel III is positioned on the lower part of the piston II, the upper part of the main fluid channel IV is communicated with the main fluid channel I through a connecting channel IV, the connecting channel IV and the pressure relief hole I are positioned on the same horizontal plane, and the bottom of the main fluid channel IV is provided with a plug IV;
the pressure relief control mechanism comprises a rotary rod and a piston III, the rotary rod comprises a cylinder section I, a cylinder section II and a cylinder section III which are sequentially connected from top to bottom and of which the outer diameters are sequentially reduced, the outer diameter of the cylinder section I is matched with the inner diameter of the main fluid channel I, a guide sleeve is sleeved on the outer surface of the cylinder section, the length of the guide sleeve is smaller than that of the cylinder section II, a guide groove surrounding the guide sleeve for one circle is arranged in the middle of the guide sleeve, the guide groove enables the guide sleeve to be separated into an upper guide sleeve and a lower guide sleeve, the upper guide sleeve and the lower guide sleeve are connected through a limiting support rod arranged on the outer surface of the guide sleeve, the lower surface of the upper guide sleeve comprises a vertical surface and a curved surface which are connected end to end, and the upper surface of the lower guide sleeve comprises a first upper surface and a second upper surface which are connected end to end, the first upper surface is a curved surface or an inclined surface which inclines downwards, and the starting end of the first upper surface is over against the vertical surface of the upper guide sleeve; a through hole penetrating through the second cylindrical section in the radial direction is formed in the second cylindrical section, a guide rod is arranged in the through hole, the length of the guide rod is larger than the outer diameter of the second cylindrical section and is smaller than or equal to the outer diameter of the guide sleeve, and one end, protruding out of the second cylindrical section, of the guide rod is located in the guide groove;
an arc-shaped pressure relief cavity is arranged on a cylindrical section II below the guide sleeve, and the radian of the arc-shaped pressure relief cavity is larger than the included angle between the first pressure relief hole and the fourth connecting channel, so that the first pressure relief hole and the fourth connecting channel can be communicated after the rotating rod rotates, and the annular ring is closed to relieve the pressure inside the deep water sleeve;
a disc spring group is sleeved on the outer surface of the third cylindrical section, the third piston is abutted against the disc spring group, and a limit groove for accommodating the third cylindrical section is formed in the top of the third piston;
the horizontal plane of the top of the rotating rod is lower than that of the first connecting channel, the horizontal plane of the bottom of the third piston is higher than that of the second connecting channel, the first connecting channel is communicated with the second main fluid channel, and hydraulic oil is arranged in the first connecting channel and the third connecting channel.
Preferably, the second upper surface of the lower guide sleeve comprises a first vertical surface, a horizontal surface, a second vertical surface and a curved surface which are sequentially connected end to end, and the starting end of the first vertical surface is connected with the lower end of the first upper surface.
Preferably, the first upper surface is a concave surface, a horizontal plane at a left end of the concave surface is lower than a horizontal plane at a right end of the concave surface, the left end of the concave surface is connected with a start end of the second upper surface, and the right end of the concave surface is connected with a tail end of the second upper surface.
Preferably, the bottom of the second vertical surface is connected to the top of the horizontal surface.
Preferably, the curved surface of the second upper surface is an inclined surface.
Preferably, at least one annular groove is formed in the first piston, the second piston, the third piston and the first cylindrical section, at least one annular groove is formed in the second cylindrical section at the upper end and the lower end of the arc-shaped pressure relief cavity respectively, and a sealing ring is arranged in each annular groove.
Preferably, the pressure relief assemblies are arranged in plurality and are uniformly distributed on the shell.
On the other hand, a recoverable pressure relief method for releasing the annular trapping pressure of the sleeve is also provided, and pressure relief is carried out by adopting any one of the recoverable pressure relief devices for releasing the annular trapping pressure of the sleeve;
fluid in the annular trap enters the main fluid channel II from the top of the main fluid channel II, and fluid in the deep water oil and gas well casing enters the main fluid channel IV and the connecting channel IV through the pressure relief hole II and enters the main fluid channel III through the connecting channel III;
in an initial state, the rotating rod blocks the first pressure relief hole and/or the fourth connecting channel;
when the pressure of fluid in the annular trap is larger than that of fluid in the deep water sleeve and the pressure difference is larger than a pressure relief threshold value, the piston in the main fluid channel II moves downwards, the pressure is transmitted through the main fluid channel II and hydraulic oil in the main fluid channel I, the rotating rod moves downwards, the guide sleeve is fixed, and the guide rod moves downwards along the vertical surface and then rotates and recovers along the curved surface; in the rotating process of the guide rod, the rotating rod is driven to rotate, the arc-shaped pressure relief cavity is communicated with the first pressure relief hole and the fourth connecting channel, and the pressure of the annular enclosure is transmitted to the interior of the deep water sleeve to realize pressure relief.
Preferably, when the pressure difference P is greater than F, the rotating rod starts to rotate, where F is kx, where k is the compression coefficient of the disc spring set and x is the length of the vertical plane.
The invention has the beneficial effects that:
the annular trap and the interior of the deepwater casing can be communicated through the pressure relief assembly, and pressure relief is carried out through the pressure difference between the annular trap and the interior of the deepwater casing, so that the annular trap pressure of the casing of the deepwater oil-gas well can be controlled and can be repeatedly used, the safety of a shaft in the well completion and exploitation processes is guaranteed, and the waste of manpower and material resources is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of a recoverable pressure relief device for releasing the pressure trapped in the annulus of a casing according to the present invention;
FIG. 2 is a schematic diagram of a front view of a casing of the recoverable pressure relief device for releasing the annulus trapping pressure of the sleeve of the present invention;
FIG. 3 is a schematic side view of a recoverable pressure relief device housing configured to release a trapped annular pressure of a bushing in accordance with the present invention;
FIG. 4 is a schematic diagram of a front view of a recoverable pressure relief device for releasing the pressure trapped in the annulus of the casing according to the present invention;
FIG. 5 is a schematic diagram of a pressure release control mechanism of a recoverable pressure release device for releasing the pressure trapped in the annulus of a casing according to the present invention;
FIG. 6 is a schematic diagram of a front view of a rotating rod of the recoverable pressure relief device for releasing the pressure of the hollow enclosure of the sleeve according to the present invention;
FIG. 7 is a schematic perspective view of a guide sleeve of the recoverable pressure relief device for releasing the pressure trapped in the annulus of the sleeve according to the present invention;
FIG. 8 is a schematic perspective view of a lower guide sleeve of the recoverable pressure relief device for releasing the pressure trapped in the annulus of the casing according to the present invention;
FIG. 9 is a schematic perspective view of a casing of the recoverable pressure relief device for releasing the pressure trapped in the annulus of the casing according to the present invention;
FIG. 10 is a schematic view of the recoverable pressure relief device according to the present invention with the pressure trapped in the annulus of the sleeve released;
fig. 11 is a schematic view of a recoverable pressure relief device for releasing the pressure trapped in the annulus of the sleeve according to the present invention.
Reference numbers in the figures: 1-housing, 101-first cylinder segment, 102-second cylinder segment, 103-third cylinder segment, 104-fourth cylinder segment, 105-fifth cylinder segment, 2-pressure relief assembly, 3-tool body, 301-main fluid channel one, 302-main fluid channel two, 303-main fluid channel three, 304-main fluid channel four, 305-plug one, 306-plug two, 307-connecting channel one, 308-connecting channel two, 309-plug three, 310-connecting channel three, 311-connecting channel four, 312-plug four, 4-pressure relief control mechanism, 5-piston one, 6-piston two, 7-pressure relief hole one, 8-pressure relief hole two, 9-rotating rod, rotating rod 901-cylinder segment one, 902-cylinder segment two, 903-cylinder section III, 904-through hole, 905-guide rod, 906-arc pressure relief cavity, 907-disc spring group, 10-piston III, 11-guide sleeve, 1101-upper guide sleeve, 1102-lower guide sleeve, 1103-limit support rod, 12-guide groove, 13-limit groove and 14-limit fixing groove.
Detailed Description
The invention is further illustrated with reference to the following figures and examples. It should be noted that, in the present application, the embodiments and the technical features of the embodiments may be combined with each other without conflict. It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "comprising" or "including" and the like in the present disclosure is intended to mean that the elements or items listed before the term cover the elements or items listed after the term and their equivalents, but not to exclude other elements or items.
In one aspect, as shown in fig. 1, the invention provides a recoverable pressure relief device for releasing the annulus trapping pressure of a casing, which comprises a casing 1 and at least one group of pressure relief assemblies 2 arranged on the casing 1, wherein the casing 1 comprises a first cylindrical section 101, a second cylindrical section 102 and a third cylindrical section 103 which are sequentially connected and coaxially arranged, the inner diameters of the first cylindrical section 101 and the third cylindrical section 103 are smaller than the inner diameter of the second cylindrical section 102, and the first cylindrical section 101 and the third cylindrical section 103 are respectively in threaded connection with two casings in a deep water oil and gas well casing, so that the casing 1 is communicated with the interior of the deep water oil and gas well casing; pressure release subassembly 2 can communicate annular ring encirclement and deep water sheathed tube inside, make annular ring encirclement pressure to deep water oil gas well sheathed tube inside transmission realizes the pressure release, just pressure release subassembly 2 can reset after the pressure release, realizes recoverable formula pressure release.
In a specific embodiment, the casing 1 further comprises a fourth cylinder segment 104 and a fifth cylinder segment 105 having the same diameter as the second cylinder segment 102, wherein the bottom of the fourth cylinder segment 104 is connected to the top of the first cylinder segment 101, and the top of the fifth cylinder segment 105 is connected to the bottom of the third cylinder segment 103.
In a specific embodiment, the pressure relief assembly 2 includes a tool body 3 disposed axially along an outer surface of the casing 1, a primary fluid passage i 301, a primary fluid passage ii 302, a primary fluid passage iii 303, and a primary fluid passage iv 304 are disposed in the tool body 3, a pressure relief control mechanism 4 is disposed in the primary fluid passage i 301, a piston i 5 is disposed in the primary fluid passage ii 302, a piston ii 6 is disposed in the primary fluid passage iii 303, a pressure relief hole i 7 and a pressure relief hole ii 8 are disposed in the tool body 3, the pressure relief hole i 7 communicates with the annular enclosure and the primary fluid passage i 301, and the pressure relief hole ii 8 penetrates through the second cylindrical section 102 to communicate the interior of the deep water oil and gas well casing with the primary fluid passage iv 304;
the first main fluid channel 301 longitudinally penetrates through the tool body 3, a first plug 305 is arranged at the top of the first main fluid channel 301, and a second plug 306 is arranged at the bottom of the first main fluid channel 301;
the second main fluid channel 302 is arranged at the upper left side of the first main fluid channel 301 in parallel and is communicated with the first main fluid channel 301 through a first connecting channel 307, and the first connecting channel 307 is positioned at the lower part of the first piston 5;
the main fluid channel III 303 is arranged at the lower part of the right side of the main fluid channel I301 in parallel and is communicated with the main fluid channel I301 through a connecting channel II 308, the connecting channel II 308 is positioned at the upper part of the piston II 6, and a plug III 309 is arranged at the bottom of the main fluid channel III 303;
the main fluid channel IV 304 is arranged on the right side of the main fluid channel III 303 in parallel, the lower part of the main fluid channel IV 304 is communicated with the main fluid channel III 303 through a connecting channel III 310, the connecting channel III 310 is positioned on the lower part of the piston II 6, the upper part of the main fluid channel IV 304 is communicated with the main fluid channel I301 through a connecting channel IV 311, the connecting channel IV 304 and the pressure relief hole I7 are positioned on the same horizontal plane, and the bottom of the main fluid channel IV 304 is provided with a plug IV 312;
the pressure relief control mechanism 4 comprises a rotating rod 9 and a piston III 10, the rotating rod 9 comprises a first cylindrical section 901, a second cylindrical section 902 and a third cylindrical section 903 which are sequentially connected from top to bottom and have sequentially reduced outer diameters, the outer diameter of the first cylindrical section 901 is matched with the inner diameter of the first main fluid channel 301, a guide sleeve 11 is sleeved on the outer surface of the second cylindrical section 902, the length of the guide sleeve 11 is smaller than that of the second cylindrical section 902, a guide groove 12 surrounding the guide sleeve 11 for one circle is arranged in the middle of the guide sleeve 11, the guide groove 12 enables the guide sleeve 11 to be separated into an upper guide sleeve 1101 and a lower guide sleeve 1102, the upper guide sleeve 1101 and the lower guide sleeve 1102 are connected through a limiting support rod 1103 arranged on the outer surface of the guide sleeve 11, and the lower surface of the upper guide sleeve 1101 comprises a vertical surface and a curved surface which are connected end to end, the upper surface of the lower guide sleeve 1102 comprises a first upper surface and a second upper surface which are connected end to end, the first upper surface is a curved surface or an inclined surface which is inclined downwards, and the starting end of the first upper surface is opposite to the vertical surface of the upper guide sleeve 1101; a through hole 904 radially penetrating through the second cylindrical section 902 is formed in the second cylindrical section 902, a guide rod 905 is arranged in the through hole 904, the length of the guide rod 905 is greater than the outer diameter of the second cylindrical section 902 and less than or equal to the outer diameter of the guide sleeve 11, and one end of the guide rod 905, protruding out of the second cylindrical section 902, is located in the guide groove 12;
an arc-shaped pressure relief cavity 906 is arranged on the second cylindrical section 902 below the guide sleeve 11, and the radian of the arc-shaped pressure relief cavity 906 is larger than the included angle between the first pressure relief hole 7 and the fourth connecting channel 311, so that the first pressure relief hole 7 and the fourth connecting channel 311 can be communicated after the rotating rod 9 rotates, and the annular ring is closed to release pressure inside the deep water casing;
a disc spring group 907 is sleeved on the outer surface of the third cylindrical section 903, the third piston 10 is abutted to the disc spring group 907, and a limiting groove 13 for accommodating the third cylindrical section 903 is formed in the top of the third piston 10;
the horizontal plane of the top of the rotating rod 9 is lower than the horizontal plane of the first connecting channel 307, the horizontal plane of the bottom of the piston three 10 is higher than the horizontal plane of the second connecting channel 308, hydraulic oil is arranged in the first main fluid channel 301 and the second main fluid channel 302 communicated with the first connecting channel 307, and hydraulic oil is arranged in the first main fluid channel 301 and the third main fluid channel 303 communicated with the second connecting channel 308.
In the above embodiment, when the difference between the annular confinement pressure and the pressure of the fluid in the deep water casing does not exceed the pressure relief threshold, the guide rod 905 does not move, or moves downwards at the vertical plane only under the action of the pressure difference, the displacement does not exceed the length of the vertical plane, and the whole rotating rod 9 does not rotate; when the difference between the pressure of the annulus trap and the pressure of the fluid in the deepwater casing exceeds a pressure relief threshold, under the condition that the guide sleeve 11 is fixed, the guide rod 905 moves downwards to move out of the vertical surface of the upper guide sleeve 1101 and reach the first upper surface of the lower guide sleeve 1102, and because the first upper surface is obliquely arranged, the guide rod 905 starts to rotate along the first upper surface of the lower guide sleeve 1102, so that the whole rotating rod 9 is driven to rotate, the arc-shaped pressure relief cavity 906 is communicated with the first pressure relief hole 7 and the fourth connecting channel 311 in the rotating process, so that the annulus trap is communicated with the inside of the deepwater casing, and the pressure of the annulus trap is transmitted to the inside of the deepwater casing, so that pressure relief is realized; after pressure relief, the curved surface of the upper guide sleeve 1101 is connected with the upper end and the lower end of the vertical surface of the upper guide sleeve 1101 end to end, so that the guide rod 905 starts to rotate along the curved surface to restore to the original position at the included angle between the vertical surface and the curved surface, the rotating rod 9 is made to rotate and restore to the original state before pressure relief, and the restorable pressure relief is realized.
In a specific embodiment, a limit fixing groove 14 is formed in the first main fluid channel, and the guide sleeve 11 is fixed in the limit fixing groove 14 in a limiting manner. Alternatively, when the upper and lower guide sleeves of the guide sleeve 11 are respectively composed of multi-petal arc petals, the limit fixing groove 14 is also correspondingly designed as a sub-limit fixing groove corresponding to the number of petals.
In a specific embodiment, the second upper surface of the lower guide sleeve 1102 includes a first vertical surface, a horizontal surface, a second vertical surface, and a curved surface connected end to end, and the starting end of the first vertical surface is connected to the lower end of the first upper surface.
Optionally, the first upper surface is a concave surface, a horizontal plane at a left end of the concave surface is lower than a horizontal plane at a right end of the concave surface, the left end of the concave surface is connected with a start end of the second upper surface, and the right end of the concave surface is connected with a tail end of the second upper surface.
Optionally, the bottom of the second vertical surface is connected to the top of the horizontal surface, and the curved surface of the second upper surface is an inclined surface.
In the above embodiment, the structure of the second upper surface can make the space of the guide groove 12 more convenient for the guide bar 905 to rotate, so as to avoid the guide bar 905 from being stuck.
In order to improve the sealing performance of each part, at least one annular groove is formed in the first piston 5, the second piston 6, the third piston 10 and the first cylindrical section 901, at least one annular groove is formed in each of the second cylindrical sections 902 at the upper end and the lower end of the arc-shaped pressure relief cavity 906, and a sealing ring is arranged in each annular groove.
In a specific embodiment, the pressure relief assembly 2 is provided in plurality, and the plurality of pressure relief assemblies 2 are uniformly distributed on the housing 1. Optionally, three pressure relief assemblies are provided.
In a specific embodiment, a plug can be disposed at the top of the second main fluid channel 302, and then a fluid inlet hole communicating with the inside of the second main fluid channel 302 is disposed on the plug.
On the other hand, the invention also provides a recoverable pressure relief method for releasing the annular trapped pressure of the sleeve, which adopts any one of the recoverable pressure relief devices for releasing the annular trapped pressure of the sleeve to relieve pressure;
fluid in the annular trap enters the main fluid channel II 302 from the top of the main fluid channel II 302, and fluid in the deep water oil and gas well casing enters the main fluid channel IV 304 and the connecting channel IV 311 through the pressure relief hole II 8 and enters the main fluid channel III 303 through the connecting channel III 310;
in an initial state, the rotating rod 9 blocks the first pressure relief hole 7 and/or the fourth connecting channel 311;
when the pressure of fluid in the annular trap is larger than that of fluid in the deep water sleeve and the pressure difference is larger than the pressure relief threshold, the piston in the main fluid channel II 302 moves downwards, the pressure is transmitted through hydraulic oil in the main fluid channel II 302 and the main fluid channel I301, the rotating rod 9 moves downwards, the guide sleeve 11 is fixed, and the guide rod 905 moves downwards along the vertical plane and then rotates and recovers along the curved surface; in the rotating process of the guide rod 905, the rotating rod is driven to rotate, so that the arc-shaped pressure relief cavity 906 is communicated with the first pressure relief hole 7 and the fourth connecting channel 311, the pressure of the annular enclosure is transmitted to the interior of the deep water sleeve, and the pressure relief is realized.
When the recoverable pressure relief device for releasing the annular trapped pressure of the sleeve is used for pressure relief, when the pressure difference P is larger than F, the rotating rod starts to rotate, and the F is kx, wherein k is the compression coefficient of the disc spring set, and x is the length of the vertical surface. The pressure relief devices with different pressure difference thresholds can be obtained by adjusting the length of the vertical surface, the number of disc springs of the disc spring group and the like.
In conclusion, the pressure relief assembly utilizes the pressure difference between the inside and the outside of the sleeve as the power of the pressure relief assembly, so that the pressure relief assembly can relieve pressure through the pressure difference.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A recoverable pressure relief device for releasing the annular confining pressure of a casing is characterized by comprising a casing and at least one group of pressure relief components arranged on the casing, wherein the casing comprises a first cylinder section, a second cylinder section and a third cylinder section which are sequentially connected and coaxially arranged, the inner diameters of the first cylinder section and the third cylinder section are smaller than that of the second cylinder section, and the first cylinder section and the third cylinder section are respectively in threaded connection with two casings in a deepwater oil and gas well casing, so that the casing is communicated with the interior of the deepwater oil and gas well casing; the pressure release subassembly can communicate annular ring encirclement and deep water sheathed tube inside, make annular ring encirclement pressure to deep water oil gas well sheathed tube inside transmission realizes the pressure release, just the pressure release subassembly can reset after the pressure release, realizes recoverable formula pressure release.
2. The recoverable pressure relief device for releasing annulus entrapment pressure of a casing according to claim 1, wherein the pressure relief assembly comprises a tool body arranged axially along the outer surface of the casing, a first main fluid channel, a second main fluid channel, a third main fluid channel and a fourth main fluid channel are arranged in the tool body, a pressure relief control mechanism is arranged in the first main fluid channel, a first piston is arranged in the second main fluid channel, a second piston is arranged in the third main fluid channel, a first pressure relief hole and a second pressure relief hole are arranged in the tool body, the first pressure relief hole is communicated with the annulus entrapment and the first main fluid channel, and the second pressure relief hole penetrates through the second cylindrical section to communicate the interior of the casing of the deep oil and gas well with the fourth main fluid channel;
the first main fluid channel longitudinally penetrates through the tool main body, a first plug is arranged at the top of the first main fluid channel, and a second plug is arranged at the bottom of the first main fluid channel;
the main fluid channel II is arranged on the upper portion of the left side of the main fluid channel I in parallel and communicated with the main fluid channel I through a connecting channel I, and the connecting channel I is positioned on the lower portion of the piston I;
the main fluid channel III is arranged on the lower portion of the right side of the main fluid channel I in parallel and is communicated with the main fluid channel I through a connecting channel II, the connecting channel II is located on the upper portion of the piston II, and a plug III is arranged at the bottom of the main fluid channel III;
the main fluid channel IV is arranged on the right side of the main fluid channel III in parallel, the lower part of the main fluid channel IV is communicated with the main fluid channel III through a connecting channel III, the connecting channel III is positioned on the lower part of the piston II, the upper part of the main fluid channel IV is communicated with the main fluid channel I through a connecting channel IV, the connecting channel IV and the pressure relief hole I are positioned on the same horizontal plane, and the bottom of the main fluid channel IV is provided with a plug IV;
the pressure relief control mechanism comprises a rotary rod and a piston III, the rotary rod comprises a cylinder section I, a cylinder section II and a cylinder section III which are sequentially connected from top to bottom and of which the outer diameters are sequentially reduced, the outer diameter of the cylinder section I is matched with the inner diameter of the main fluid channel I, a guide sleeve is sleeved on the outer surface of the cylinder section, the length of the guide sleeve is smaller than that of the cylinder section II, a guide groove surrounding the guide sleeve for one circle is arranged in the middle of the guide sleeve, the guide groove enables the guide sleeve to be separated into an upper guide sleeve and a lower guide sleeve, the upper guide sleeve and the lower guide sleeve are connected through a limiting support rod arranged on the outer surface of the guide sleeve, the lower surface of the upper guide sleeve comprises a vertical surface and a curved surface which are connected end to end, and the upper surface of the lower guide sleeve comprises a first upper surface and a second upper surface which are connected end to end, the first upper surface is a curved surface or an inclined surface which inclines downwards, and the starting end of the first upper surface is over against the vertical surface of the upper guide sleeve; a through hole penetrating through the second cylindrical section in the radial direction is formed in the second cylindrical section, a guide rod is arranged in the through hole, the length of the guide rod is larger than the outer diameter of the second cylindrical section and is smaller than or equal to the outer diameter of the guide sleeve, and one end, protruding out of the second cylindrical section, of the guide rod is located in the guide groove;
an arc-shaped pressure relief cavity is arranged on a cylindrical section II below the guide sleeve, and the radian of the arc-shaped pressure relief cavity is larger than the included angle between the first pressure relief hole and the fourth connecting channel, so that the first pressure relief hole and the fourth connecting channel can be communicated after the rotating rod rotates, and the annular ring is closed to relieve the pressure inside the deep water sleeve;
a disc spring group is sleeved on the outer surface of the third cylindrical section, the third piston is abutted against the disc spring group, and a limit groove for accommodating the third cylindrical section is formed in the top of the third piston;
the horizontal plane of the top of the rotating rod is lower than that of the first connecting channel, the horizontal plane of the bottom of the third piston is higher than that of the second connecting channel, the first connecting channel is communicated with the second main fluid channel, and hydraulic oil is arranged in the first connecting channel and the third connecting channel.
3. The apparatus of claim 2, wherein the second upper surface of the lower guide sleeve comprises a first vertical surface, a horizontal surface, a second vertical surface, and a curved surface, which are connected end to end, and wherein the first vertical surface is connected to the lower end of the first upper surface at its initial end.
4. The recoverable pressure relief device for relieving annulus trapping pressure of a cannula of claim 3, wherein said first upper surface is a concave surface, wherein a left end of said concave surface is at a lower level than a right end of said concave surface, wherein a left end of said concave surface is connected to a beginning of said second upper surface, and wherein a right end of said concave surface is connected to an end of said second upper surface.
5. The recoverable pressure relief device for relieving the annulus trapping pressure of a cannula of claim 4, wherein the bottom of the second vertical surface is connected to the top of the horizontal surface.
6. The recoverable pressure relief device for relieving cannula annulus entrapment pressure of claim 5 wherein the second upper surface is curved with an inclined surface.
7. The recoverable pressure relief device for releasing the annulus trapping pressure of a cannula according to claim 2, wherein the first piston, the second piston, the third piston and the first cylindrical section are provided with at least one annular groove, the second cylindrical sections at the upper end and the lower end of the arc-shaped pressure relief cavity are respectively provided with at least one annular groove, and a sealing ring is arranged in each annular groove.
8. The apparatus of any of claims 1-7, wherein a plurality of pressure relief assemblies are provided and are evenly distributed on the housing.
9. A recoverable pressure relief method for releasing the annulus trapping pressure of a sleeve, which is characterized in that the pressure is relieved by adopting the recoverable pressure relief device for releasing the annulus trapping pressure of the sleeve according to any one of claims 1 to 8;
fluid in the annular trap enters the main fluid channel II from the top of the main fluid channel II, and fluid in the deep water oil and gas well casing enters the main fluid channel IV and the connecting channel IV through the pressure relief hole II and enters the main fluid channel III through the connecting channel III;
in an initial state, the rotating rod blocks the first pressure relief hole and/or the fourth connecting channel;
when the pressure of fluid in the annular trap is larger than that of fluid in the deep water sleeve and the pressure difference is larger than a pressure relief threshold value, the piston in the main fluid channel II moves downwards, the pressure is transmitted through the main fluid channel II and hydraulic oil in the main fluid channel I, the rotating rod moves downwards, the guide sleeve is fixed, and the guide rod moves downwards along the vertical surface and then rotates and recovers along the curved surface; in the rotating process of the guide rod, the rotating rod is driven to rotate, the arc-shaped pressure relief cavity is communicated with the first pressure relief hole and the fourth connecting channel, and the pressure of the annular enclosure is transmitted to the interior of the deep water sleeve to realize pressure relief.
10. The method of claim 9, wherein the rotation lever starts to rotate when the pressure difference P is greater than F, where k is the compression factor of the disc spring set and x is the length of the vertical surface.
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| CN202210629564.6A CN114961643B (en) | 2022-06-01 | 2022-06-01 | Recoverable pressure relief device and method for releasing annular entrapment pressure of casing |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0136146A2 (en) * | 1983-09-19 | 1985-04-03 | Halliburton Company | Annulus pressure responsive downhole tool |
| AU543676B1 (en) * | 1983-09-19 | 1985-04-26 | Halliburton Company | Low pressure responsive downhole tool |
| US20110114333A1 (en) * | 2009-11-17 | 2011-05-19 | Vetco Gray Inc. | Casing Annulus Management |
| CN204532254U (en) * | 2015-02-09 | 2015-08-05 | 中国石油天然气股份有限公司 | A kind of compression relief cock valve and Oil/gas Well are tested and are altered, test and leakage use tubing string |
| CN106761554A (en) * | 2016-12-20 | 2017-05-31 | 中国石油天然气股份有限公司 | The pressure relief device in deep water hydrocarbon casing trap space |
| CN107269239A (en) * | 2017-08-04 | 2017-10-20 | 西南石油大学 | A kind of devices and methods therefor of stable oil jacket annular pressure |
| CN206693987U (en) * | 2017-05-04 | 2017-12-01 | 张如亮 | A kind of floating type automatic constant pressure puts set pressure device |
| CN108412458A (en) * | 2018-03-16 | 2018-08-17 | 中国海洋石油集团有限公司 | The two-way controllable deep water annular space trapped pressure pressure relief device of one kind and method |
| CN108843272A (en) * | 2018-06-19 | 2018-11-20 | 中国海洋石油集团有限公司 | Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure |
| CN108868692A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of casing further chambers pressure relief device administered for deep water annular space trapped pressure |
| CN208184710U (en) * | 2018-04-11 | 2018-12-04 | 中国石油大学(北京) | Shearing casing annulus relief valve |
| CN110410035A (en) * | 2019-09-16 | 2019-11-05 | 长江大学 | A kind of double-direction relief pipe nipple for down-hole casing annular space |
| CN110439500A (en) * | 2019-08-20 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | It is a kind of can pressure release self-sealing cup packer and its application method |
| CN111706313A (en) * | 2020-07-01 | 2020-09-25 | 西南石油大学 | Pressure relief protector for deep water oil gas test retention valve |
| CN114263438A (en) * | 2021-12-15 | 2022-04-01 | 中海石油(中国)有限公司 | Deep water oil gas well casing bypass annular pressure release device and method thereof |
-
2022
- 2022-06-01 CN CN202210629564.6A patent/CN114961643B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0136146A2 (en) * | 1983-09-19 | 1985-04-03 | Halliburton Company | Annulus pressure responsive downhole tool |
| AU543676B1 (en) * | 1983-09-19 | 1985-04-26 | Halliburton Company | Low pressure responsive downhole tool |
| US20110114333A1 (en) * | 2009-11-17 | 2011-05-19 | Vetco Gray Inc. | Casing Annulus Management |
| CN204532254U (en) * | 2015-02-09 | 2015-08-05 | 中国石油天然气股份有限公司 | A kind of compression relief cock valve and Oil/gas Well are tested and are altered, test and leakage use tubing string |
| CN106761554A (en) * | 2016-12-20 | 2017-05-31 | 中国石油天然气股份有限公司 | The pressure relief device in deep water hydrocarbon casing trap space |
| CN206693987U (en) * | 2017-05-04 | 2017-12-01 | 张如亮 | A kind of floating type automatic constant pressure puts set pressure device |
| CN107269239A (en) * | 2017-08-04 | 2017-10-20 | 西南石油大学 | A kind of devices and methods therefor of stable oil jacket annular pressure |
| CN108412458A (en) * | 2018-03-16 | 2018-08-17 | 中国海洋石油集团有限公司 | The two-way controllable deep water annular space trapped pressure pressure relief device of one kind and method |
| CN208184710U (en) * | 2018-04-11 | 2018-12-04 | 中国石油大学(北京) | Shearing casing annulus relief valve |
| CN108843272A (en) * | 2018-06-19 | 2018-11-20 | 中国海洋石油集团有限公司 | Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure |
| CN108868692A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of casing further chambers pressure relief device administered for deep water annular space trapped pressure |
| CN110439500A (en) * | 2019-08-20 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | It is a kind of can pressure release self-sealing cup packer and its application method |
| CN110410035A (en) * | 2019-09-16 | 2019-11-05 | 长江大学 | A kind of double-direction relief pipe nipple for down-hole casing annular space |
| CN111706313A (en) * | 2020-07-01 | 2020-09-25 | 西南石油大学 | Pressure relief protector for deep water oil gas test retention valve |
| CN114263438A (en) * | 2021-12-15 | 2022-04-01 | 中海石油(中国)有限公司 | Deep water oil gas well casing bypass annular pressure release device and method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 姜心;: "海上气井环空带压油套管柱动态安全评价技术" * |
| 姜心;: "海上气井环空带压油套管柱动态安全评价技术", 中国安全生产科学技术 * |
| 胡志强;杨进;黄小龙;宋宇;李文龙;李舒展;: "深水井套管环空泄压装置的研制与应用" * |
| 胡志强;杨进;黄小龙;宋宇;李文龙;李舒展;: "深水井套管环空泄压装置的研制与应用", 石油钻探技术 * |
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