CN115370316A - Double-anchoring high-pressure packer - Google Patents
Double-anchoring high-pressure packer Download PDFInfo
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- CN115370316A CN115370316A CN202211064021.0A CN202211064021A CN115370316A CN 115370316 A CN115370316 A CN 115370316A CN 202211064021 A CN202211064021 A CN 202211064021A CN 115370316 A CN115370316 A CN 115370316A
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- 238000004873 anchoring Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 127
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002035 prolonged 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a double-anchoring high-pressure packer which is used for oil field downhole completion. The double-anchoring high-pressure packer comprises a hydraulic anchoring mechanism, wherein the hydraulic anchoring mechanism comprises a constant-pressure mechanism. The constant pressure mechanism comprises a constant pressure sleeve I, an inner bushing, a shear pin ring, shear pins, a backstop ring and a pressure cap which are coaxially arranged in the anchor body and the central pipe. The constant pressure mechanism can also be realized in such a way that the constant pressure mechanism comprises a constant pressure sleeve II, a piston, an isolating plug, a shear pin ring and shear pins thereof, which are coaxially sleeved in an anchor body; the constant pressure mechanism can also be realized by the following steps that the constant pressure mechanism comprises an isolation sleeve and a piston which are coaxially sleeved in an anchor body and a central tube, a plunger hole is formed in the central tube body, a plunger, a threaded sleeve and a shearing pin are installed on the central tube body, and a pressure guide hole I and a pressure guide hole II are arranged to communicate a lower cavity of the piston with an inner hole of the central tube; furthermore, an air vent and a blind plug are arranged at the upper part of the anchor body, and a communication hole and a sealing joint are arranged on the piston. The invention improves the bearing capacity of the double-anchoring high-pressure packer.
Description
Technical Field
The invention belongs to the technical field of underground packers for oilfield development, and particularly relates to a double-anchoring high-pressure packer which is used for well completion of a high-pressure oil-gas well.
Background
Downhole packers are one of the most important tools for oilfield development and are widely used in oil and gas injection and production wells. With the progress of oil and gas development technology, the development depth of an oil and gas well is deeper, the pressure is higher, and the performance requirement on a downhole packer is higher.
Chinese patent, application number 202011453193.8, application date 2020.12.11, patent name "a high temperature and high pressure resistant packer" discloses a packer with two-way anchoring. The packer rubber cylinder is centered, the cone and the slips are respectively arranged on two sides, and the structure is favorable for the packer to bear high pressure. However, in experiments and use, when the central pipe bears a large lower pressure difference, the piston force is transmitted to the seal-removing shear pin or the seal-removing shear ring due to the fact that the central pipe bears a large piston force, and when the piston force is larger than the shearing force of the seal-removing shear pin or the seal-removing shear ring, the packer can be unsealed.
Disclosure of Invention
In order to solve the technical problems, the invention provides the double-anchoring high-pressure packer, solves the problems of insufficient pressure bearing capacity and easiness in deblocking of the conventional double-anchoring packer, and improves the capacity of sealing the lower pressure difference of the packer.
In order to achieve the purpose, the invention adopts the following technical scheme:
the double-anchoring high-pressure packer is characterized in that a hydraulic anchoring mechanism is arranged on the upper portion of the packer, and a constant-pressure mechanism is arranged in the hydraulic anchoring mechanism.
As one of the preferred embodiments, the constant pressure mechanism comprises a first constant pressure sleeve, the first constant pressure sleeve is coaxially sleeved in an inner hole of the anchor body, an upper sealing surface I and a lower sealing surface I are formed between the first constant pressure sleeve and the anchor body on the upper side and the lower side of the anchor tooth pressure transmission hole, a first sealing ring is arranged at one position of the upper sealing surface, and a second sealing ring is arranged at one position of the lower sealing surface; an inner bushing is coaxially and fixedly connected to the upper end of an inner hole of the central tube, the upper part of the inner bushing is coaxially sleeved in an inner hole at the lower part of the first constant pressure sleeve, a third sealing surface is formed between the inner bushing and the first constant pressure sleeve, a fourth sealing ring is arranged, and a third sealing ring is arranged between the inner bushing and the central tube; the diameter of the upper sealing surface I is larger than that of the sealing surface III; the periphery of the lower end of the constant pressure sleeve is provided with a shear pin groove and sleeved with a shear pin ring, the shear pin is arranged on the shear pin ring, and the lower end face of the shear pin ring is contacted with the upper end face of the central pipe; and balance holes are radially arranged on the anchor body above the connecting threads of the central pipe and the anchor body. And a check ring is arranged in an annular space between the inner hole of the anchor body and the first constant pressure sleeve and above the shear pin ring, a pressure cap is arranged between the check ring and the shear pin ring to fix the check ring, and a sawtooth thread is oppositely arranged between the first constant pressure sleeve and the check ring.
As a second preferred embodiment, the constant pressure mechanism comprises a second constant pressure sleeve, the second constant pressure sleeve is coaxially sleeved in an inner hole of the anchor body, and a fifth sealing ring is arranged between the upper end of the second constant pressure sleeve and the anchor body; a piston and an isolation plug are sequentially sleeved above the central tube in an annulus between the lower part of the inner hole of the anchor body and the second constant pressure sleeve; a pressure transmitting hole is formed in the side wall of the second constant pressure sleeve between the ten sealing rings and the nine sealing rings; a communicating hole is axially formed in the piston body; an upper sealing surface II and a lower sealing surface II are formed between the upper part and the lower part of the inner hole of the isolating plug and the periphery of the constant pressure sleeve II, a sealing ring eight is arranged at the upper sealing surface II, a sealing ring seven is arranged at the lower sealing surface II, and the diameter of the upper sealing surface II is larger than that of the lower sealing surface II; a sixth sealing ring and a eleventh sealing ring are respectively arranged between the upper and lower parts of the periphery of the isolating plug and the inner hole of the anchor body, a guide hole is radially arranged in the middle of the isolating plug, and a balance hole is radially arranged on the anchor body opposite to the guide hole; and a shear pin groove is formed in the periphery of the lower end of the constant pressure sleeve II, a shear pin ring is sleeved on the shear pin groove, and the shear pin is installed on the shear pin ring, and the lower end face of the shear pin ring is in contact with the upper end face of the inner hole of the central pipe. Furthermore, an air vent is arranged at the upper part of the anchor body and communicates with an annular space between the outside of the anchor body and the second constant pressure sleeve and the anchor body, and a blind plug is connected with an outer opening of the air vent through threads; the lower opening of the communicating hole is in threaded connection with a sealing joint, and hydraulic oil or corrosion inhibitor solution is filled in the closed cavity; furthermore, the second constant pressure sleeve and the shear pin ring are oppositely provided with sawtooth-shaped locking threads, the shear pin ring is a C-shaped ring, and the upper end face of the shear pin ring is in contact with the lower end face of the isolation plug.
As a third preferred embodiment, the constant pressure mechanism comprises an isolation sleeve, the isolation sleeve is coaxially sleeved in inner holes of the anchor body and the central tube, and the upper end and the lower end of the isolation sleeve are respectively sealed with the anchor body and the central tube; a piston is coaxially sleeved in the annular space of the anchor body and the isolation sleeve, the inner hole and the periphery of the piston are respectively sealed with the isolation sleeve and the anchor body, and a communication hole is axially formed in the body of the piston; a plunger hole is arranged on the upper shaft of the central tube body, a plunger is arranged in the plunger hole, and a pressure guide hole I communicated with the plunger hole and the inner hole of the central tube is radially arranged at the upper end of the plunger hole; an upper sealing ring and a lower sealing ring are arranged on the upper part of the plunger, and a right-angle pressure guide hole II is arranged on the central tube body and is communicated with an annular space between the lower cavity of the piston and the upper sealing ring and the lower sealing ring arranged on the plunger; the lower end of the plunger hole is in threaded connection with a threaded sleeve, the lower end of the plunger is coaxially sleeved in an inner hole of the threaded sleeve, and a shearing pin is arranged at the sleeved overlapping part of the threaded sleeve and the plunger and penetrates through the threaded sleeve and the plunger in the radial direction. Furthermore, the upper part of the anchor body is provided with an air vent which communicates the outside of the anchor body with an annular space between the isolation sleeve and the anchor body, and an outer opening of the air vent is in threaded connection with a blind plug; the lower opening of the communicating hole is in threaded connection with a sealing joint, and hydraulic oil or corrosion inhibitor solution is filled in the closed cavity.
Compared with the prior art, the invention has the advantages that:
1. set up hydraulic anchoring mechanism above former double slip anchoring sealing mechanism of double anchoring packer, improved the stress state of packer, the lower piston force that the center tube received transmits simultaneously and knows to seal on shear pin (or shear ring) and the hydraulic anchoring mechanism, makes the packer can bear higher holding down pressure and can not the deblocking.
2. The hydraulic anchoring mechanism is internally provided with a constant pressure mechanism, when setting, the constant pressure mechanism is opened under the pressure above the set pressure, and the anchor teeth extend out and are anchored on the inner wall of the sleeve. The structural design improves the stress of the double-slip anchoring sealing mechanism of the packer, and improves the setting distance of the packing element compared with a hydraulic anchoring mechanism without a constant pressure mechanism.
3. The upper piston cavity is filled with hydraulic oil, so that the working environment of the anchor teeth is improved, when the anchor tooth sealing ring is used in a water injection well or an oil well with higher water content, the problem of pipe column clamping in operation caused by scaling at the inner end of the anchor teeth can be prevented, the inner wall of the anchor tooth hole can be lubricated, and the service life of the anchor tooth sealing ring is prolonged.
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
Drawings
A more complete appreciation of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of the specification, and the illustrated embodiments and descriptions thereof are intended to illustrate the present invention and not to limit the same.
FIG. 1 is a schematic diagram of the construction of a dual anchor high pressure packer of the present invention.
Fig. 2 is a schematic structural view of a first embodiment of the hydraulic anchor mechanism.
Fig. 3 is a schematic structural view of a second embodiment of the hydraulic anchoring mechanism.
Fig. 4 is a schematic structural view of a second modification of the embodiment of the hydraulic anchor mechanism.
Fig. 5 is a schematic structural view of a third embodiment of the hydraulic anchoring mechanism.
Figure 6 isbase:Sub>A cross-sectional view of the center tube atbase:Sub>A-base:Sub>A in figure 5.
In the figure: 1-anchor body, 2-anchor tooth mechanism, 3-upper slip, 4-upper cone, 5-rubber cylinder, 6-lower cone, 7-lower slip, 8-piston hydraulic cylinder mechanism, 9-central pipe, 10-hydraulic anchoring mechanism, 201-seal ring I, 202-seal ring II, 203-check ring, 204-press cap, 205-shear pin ring, 206-shear pin, 207-balance hole, 208-seal ring III, 209-inner bushing, 210-seal ring IV, 211-constant pressure sleeve I, 212-anchor tooth pressure transfer hole, 301-seal ring V, 302-constant pressure sleeve II, 303-piston, 304-communication hole, 305-seal ring VI, 306-isolation plug, 308-seal ring VII, 309-seal ring eight, 310-seal ring nine, 311-pressure transfer hole, 312-seal ring ten, 313-seal ring eleven, 314-pressure transfer hole, 401-blind plug, 402-air relief hole, 403-seal joint, 404-closed cavity, 309-isolation sleeve, 502-pressure guide hole I, shear-seal hole 503, 505-seal ring II, 314-blind plug 506-plug screw sleeve.
Detailed Description
The positional relationships referred to in the specification and claims of this application as "upper" and "lower" are described in the context of use of the tool, with the hydraulic anchor mechanism uppermost in the tool as shown in figure 1. The other "left", "right", "high" and "low" describe their relative relationship in terms of the positional relationship seen by the reader's perspective, with the top of the page high, the bottom of the page low, the left of the page left, and the right of the page right. When the inside and outside or the inside and outside of the pipe are described, the small radius is the inside or the inside in the radial direction, and the large radius is the outside. In the drawings, the sealing rings are shown and not numbered, and are not described in detail in the following description according to the drawings.
The high pressure is generally called as the high pressure exceeding 35MPa according to the high and low sealing pressure of the oil field underground. The packer of the invention is capable of sealing differential pressures up to 70MPa and is therefore referred to as a dual-anchor high-pressure packer.
Referring to fig. 1, the double-anchoring high-pressure packer of the invention comprises a double-slip anchoring sealing mechanism, a piston hydraulic cylinder mechanism 8 and the like, wherein the double-slip anchoring sealing mechanism comprises an upper slip 3, an upper cone 4, a rubber cylinder 5, a lower cone 6, a lower slip 7 and the like which are sleeved on a central pipe 9, the piston hydraulic cylinder mechanism 8 comprises a setting piston and a hydraulic cylinder sleeve, the specific structure of the packer is simplified in the figure, the specific structure is known technology, and the specific structure refers to Chinese patent, application No. 202011453193.8, application No. 2020.12.11 and the patent name "a high temperature and high pressure resistant packer". In addition to the above structure, a hydraulic anchoring mechanism 10 is provided above the double-slip anchoring seal mechanism at the upper portion of the base pipe. The hydraulic anchoring mechanism comprises an anchor body 1 and an anchor tooth mechanism 2. The anchor tooth mechanism comprises anchor teeth, a pressure plate, a spring, a screw and the like, is a known technology and is widely applied to hydraulic anchor tools. The anchor teeth are arranged in the anchor tooth holes, and the bottom of each anchor tooth hole is provided with an anchor tooth pressure transmission hole 212 which is communicated with the central hole of the anchor body. The hydraulic anchoring mechanism 10 is further provided with a constant pressure mechanism.
In the first embodiment, referring to fig. 2, the constant pressure mechanism comprises a first constant pressure sleeve 211 coaxially sleeved in the inner hole of the anchor body 1, and an upper sealing surface I and a lower sealing surface I are formed between the first constant pressure sleeve and the anchor body on the upper side and the lower side of the anchor tooth pressure transmission hole 212. The upper and lower sides of the anchor tooth pressure transmission hole 212 refer to the upper and lower sides of the two anchor tooth pressure transmission holes 212 which are farthest away. A first sealing ring 201 is arranged at the first upper sealing surface, and a second sealing ring 202 is arranged at the first lower sealing surface. An inner bushing 209 is coaxially and fixedly connected with the upper end of an inner hole of the central tube 9, the upper part of the inner bushing is coaxially sleeved in an inner hole at the lower part of the first constant pressure bushing, a third sealing surface is formed between the inner bushing and the first constant pressure bushing, a fourth sealing ring 210 is arranged, and a third sealing ring 208 is arranged between the inner bushing and the central tube; the diameter of the upper sealing surface I is larger than that of the sealing surface III; the periphery of the lower end of the constant pressure sleeve is provided with a shear pin groove and sleeved with a shear pin ring 205, a shear pin 206 is arranged on the shear pin ring, the inner end of the shear pin extends into the shear pin groove, and the lower end face of the shear pin ring is contacted with the upper end face of the central pipe. And a balance hole 207 is radially arranged on the anchor body above the connecting thread of the central pipe and the anchor body.
The inner sealing ring or the outer sealing ring shown in the figure is changed according to the size of the tool, the outer sealing ring on the shaft can be changed into the inner sealing ring in the hole, and vice versa, the content of the scheme of the invention is not influenced, and the details are not repeated.
Because the diameter of the first upper sealing surface is larger than that of the third sealing surface, a pressure difference surface is formed on the first constant pressure sleeve, when the piston force formed by the internal and external pressure difference of the packer is larger than the shearing force of the shear pin, the shear pin is sheared by the first constant pressure sleeve to move downwards, the first sealing ring 201 is separated from the first upper sealing surface, and the pressure in the packer pushes out the anchor teeth through the anchor teeth pressure transmission hole 212 to be anchored on the inner wall of the sleeve.
Furthermore, in order to prevent the first constant pressure sleeve from going upwards accidentally after going downwards, a backstop ring 203 is arranged above the shear pin ring in an annular space between the inner hole of the anchor body and the first constant pressure sleeve, a pressing cap 204 is arranged between the backstop ring and the shear pin ring, and the pressing cap 204 is in threaded connection with the inner hole of the anchor body and used for preventing the backstop ring from moving axially. The zigzag threads are oppositely arranged between the first constant pressure sleeve and the check ring, are known in the art and are widely applied to downhole hydraulic packers.
In the second embodiment, referring to fig. 3, the constant pressure mechanism includes a second constant pressure sleeve 302, the second constant pressure sleeve 302 is coaxially sleeved in the inner hole of the anchor body 1, and a fifth sealing ring 301 is arranged between the upper end of the second constant pressure sleeve and the anchor body; a piston 303 and an isolating plug 306 are sequentially sleeved in the annular space between the lower part of the inner hole of the anchor body and the second constant pressure sleeve above the central pipe 9; ten sealing rings 312 and nine sealing rings 310 are respectively arranged between the upper part and the lower part of the inner hole of the piston and the periphery of the second constant pressure sleeve, and pressure transfer holes 311 are arranged on the side wall of the second constant pressure sleeve between the ten sealing rings and the nine sealing rings; a communication hole 304 is axially formed in the piston body; an upper sealing surface II and a lower sealing surface II are formed between the upper part and the lower part of the inner hole of the isolating plug and the periphery of the constant pressure sleeve II, a sealing ring eight 309 is arranged at the upper sealing surface II, a sealing ring seven 308 is arranged at the lower sealing surface II, and the diameter of the upper sealing surface II is larger than that of the lower sealing surface II. Six sealing rings 305 and eleven sealing rings 313 are respectively arranged between the upper part and the lower part of the outer periphery of the isolating plug and the inner hole of the anchor body, and a transmission hole 314 is radially arranged in the middle of the isolating plug. Opposite the conductive holes, balance holes 207 are radially provided in the anchor body. And a shear pin groove is formed in the periphery of the lower end of the second constant pressure sleeve, a shear pin ring 205 is sleeved on the shear pin groove, a shear pin 206 is installed on the shear pin ring, the inner end of the shear pin extends into the shear pin groove, and the lower end face of the shear pin ring is contacted with the upper end face of the inner hole of the central tube.
Because the diameter of the upper sealing surface II is larger than that of the lower sealing surface II, a pressure difference surface is formed on the constant pressure sleeve II, when the piston force formed by the internal and external pressure difference of the packer is larger than the shearing force of the shear pin, the shear pin is sheared down by the constant pressure sleeve II, the sealing ring nine 310 is separated from the sealing surface of the shear pin, the pressure in the packer is transmitted to the anchor teeth through the pressure transmission hole 311, the communication hole 304 and the anchor tooth pressure transmission hole 212 in sequence, and the anchor teeth are pushed out to be anchored on the inner wall of the sleeve.
Further, a sealed cavity 404 is formed and filled with a protective solution on the basis of the second scheme, referring to fig. 4, an air vent 402 is arranged at the upper part of the anchor body, the air vent communicates with an annular space between the outside of the anchor body and the second constant pressure sleeve 302 and the anchor body, and a blind plug 401 is connected to an outer opening of the air vent in a threaded manner; a sealing joint 403 is screwed at the lower opening of the communication hole 304. The sealing joint 403 comprises a double male joint and a sealing cap, which are commonly used in ground hydraulic control cabinet systems and are known in the art. After the blind plug and the sealing joint are arranged, a closed cavity 404 is formed among the piston 303, the anchor body 1 and the second constant pressure sleeve. Through the sealing joint 403 and the vent hole 402, protective liquid, such as hydraulic oil, corrosion inhibitor solution and the like, can be filled into the closed cavity 404, so that the sealing ring of the anchor tooth can be protected from being corroded by well fluid, and the pipe column can be prevented from being clamped during operation due to scaling around the anchor tooth. The blind plug 401 and the sealing joint 403 can be exchanged in position. After forming the closed cavity 404, the piston 303 can move up and down in the annular space in which it is located, under the push of pressure.
And furthermore, in order to prevent the second constant pressure sleeve from ascending under stress after descending and prolong the service life of the sealing ring, saw-tooth-shaped locking threads are oppositely arranged on the second constant pressure sleeve (302) and a shear pin ring (205), the shear pin ring is a C-shaped ring, the upper end surface of the shear pin ring is in contact with the lower end surface of the isolating plug 306, and the length of the locking threads on the periphery of the lower end of the second constant pressure sleeve exceeds the descending distance of the locking threads. As previously mentioned, locking thread structures are known in the art.
In the third embodiment, referring to fig. 5 and 6, the constant pressure mechanism includes an isolation sleeve 501 coaxially sleeved in the inner holes of the anchor body 1 and the central tube 9, and the upper and lower ends of the isolation sleeve are respectively sealed with the anchor body and the central tube; the piston 303 is coaxially sleeved in the annular space of the anchor body and the isolation sleeve, the inner hole and the periphery of the piston are respectively sealed with the isolation sleeve and the anchor body, and the body of the piston is axially provided with a communication hole 304.
A plunger hole is arranged on the upper shaft of the central tube 9 body, preferably, the axis of the plunger hole is parallel to the axis of the central tube, and a plunger 504 is arranged in the plunger hole. A first pressure guide hole 502 is radially arranged at the upper end of the plunger hole, and the first pressure guide hole 502 is communicated with the plunger hole and the inner hole of the central tube.
An upper sealing ring and a lower sealing ring are arranged on the periphery of the upper part of the plunger 504, and a right-angle pressure guide hole II 503 is arranged on the central tube body. As shown in fig. 6, the lower end of the second pressure guide hole 503 is communicated with an annulus between the upper and lower sealing rings arranged on the plunger. The upper end of the second pressure guide hole 503 is communicated with the lower cavity of the piston. In fig. 5, the second pressure guide hole 503 is indicated by a dotted line.
The lower end of the plunger hole is in threaded connection with a threaded sleeve 506, the lower end of the plunger is coaxially sleeved in an inner hole of the threaded sleeve, and a shearing pin 505 is arranged at the sleeved overlapping part of the threaded sleeve and the plunger and penetrates through the threaded sleeve and the plunger radially at the same time.
When the piston force generated by the pressure difference between the inside and the outside of the packer acting on the plunger is larger than the shearing force of the shearing pin 505, the plunger shears the shearing pin to descend, and the pressure guide hole I is communicated with the pressure guide hole II. The pressure in the packer is transmitted to the anchor tooth through the pressure guide hole I, the pressure guide hole II, the communicating hole and the anchor tooth pressure transmitting hole, and the anchor tooth is pushed out and anchored on the inner wall of the sleeve.
Further, a closed cavity 404 is formed and filled with a protective solution on the basis of the third scheme. An air vent 402 is arranged at the upper part of the anchor body, the air vent communicates with the annular space between the outside of the anchor body and the isolation sleeve 501 and the anchor body, and a blind plug 401 is connected with the outer opening of the air vent in a threaded manner; a sealing joint 403 is screwed at the lower opening of the communication hole 304.
After the blind plug and sealing joint are arranged, a closed cavity 404 is formed among the piston 303, the anchor body 1 and the isolation sleeve 501. Through the sealing joint 403 and the vent hole 402, protective liquid, such as hydraulic oil, corrosion inhibitor solution and the like, can be filled into the closed cavity 404, so that the sealing ring of the anchor tooth can be protected from being corroded by well fluid, and the pipe column can be prevented from being clamped during operation due to scaling around the anchor tooth. Blind plug 401 and sealing joint 403 may be swapped. After the closed cavity 404 is formed, the piston 303 can move up and down in the annular space where it is located under the pushing of the pressure.
It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.
Claims (8)
1. A double-anchoring high-pressure packer is characterized in that a hydraulic anchoring mechanism is arranged on the upper portion of the packer, and a constant-pressure mechanism is arranged in the hydraulic anchoring mechanism.
2. The double-anchor high-pressure packer as claimed in claim 1, wherein the constant pressure mechanism comprises a first constant pressure sleeve (211) coaxially sleeved in an inner hole of the anchor body (1), an upper sealing surface I and a lower sealing surface I are formed between the first constant pressure sleeve and the anchor body on the upper side and the lower side of the anchor tooth pressure transmission hole (212), a first sealing ring (201) is arranged on the upper sealing surface I, and a second sealing ring (202) is arranged on the lower sealing surface I; an inner bushing (209) is coaxially and fixedly connected with the upper end of an inner hole of the central tube (9), the upper part of the inner bushing is coaxially sleeved in the inner hole at the lower part of the first constant pressure sleeve, a third sealing surface is formed between the inner bushing and the first constant pressure sleeve, a fourth sealing ring (210) is arranged, and a third sealing ring (208) is arranged between the inner bushing and the central tube; the diameter of the upper sealing surface I is larger than that of the sealing surface III; the periphery of the lower end of the constant pressure sleeve is provided with a shear pin groove and sleeved with a shear pin ring (205), a shear pin (206) is arranged on the shear pin ring, and the lower end face of the shear pin ring is contacted with the upper end face of the central pipe; and balance holes (207) are radially arranged on the anchor body above the connecting threads of the central pipe and the anchor body.
3. A double-anchor high-pressure packer as claimed in claim 2, wherein a non-return ring (203) is arranged above the shear pin ring in the annular space between the inner bore of the anchor body and the first constant-pressure sleeve, a pressure cap (204) is arranged between the non-return ring and the shear pin ring to fix the non-return ring, and a sawtooth thread is oppositely arranged between the first constant-pressure sleeve and the non-return ring.
4. The double-anchor high-pressure packer is characterized in that the constant-pressure mechanism comprises a second constant-pressure sleeve (302), the second constant-pressure sleeve (302) is coaxially sleeved in an inner hole of the anchor body (1), and a fifth sealing ring (301) is arranged between the upper end of the second constant-pressure sleeve and the anchor body; a piston (303) and an isolating plug (306) are sequentially sleeved above the central tube (9) in an annular space between the lower part of the inner hole of the anchor body and the second constant pressure sleeve; ten sealing rings (312) and nine sealing rings (310) are respectively arranged between the upper part and the lower part of the inner hole of the piston and the periphery of the second constant pressure sleeve, and pressure transfer holes (311) are arranged on the side walls of the second constant pressure sleeve between the ten sealing rings and the nine sealing rings; a communication hole (304) is axially arranged on the piston body; an upper sealing surface II and a lower sealing surface II are formed between the upper part and the lower part of the inner hole of the isolating plug and the periphery of the constant pressure sleeve II, a sealing ring eight (309) is arranged at the upper sealing surface II, a sealing ring seven (308) is arranged at the lower sealing surface II, and the diameter of the upper sealing surface II is larger than that of the lower sealing surface II; a six sealing ring (305) and an eleven sealing ring (313) are respectively arranged between the upper and lower parts of the periphery of the isolating plug and the inner hole of the anchor body, a conducting hole (314) is radially arranged in the middle of the isolating plug, and a balance hole (207) is radially arranged on the anchor body opposite to the conducting hole; and a shear nail groove is formed in the periphery of the lower end of the second constant pressure sleeve, a shear nail ring (205) is sleeved on the shear nail groove, a shear nail (206) is installed on the shear nail ring, and the lower end face of the shear nail ring is in contact with the upper end face of the inner hole of the central pipe.
5. A double-anchoring high-pressure packer as claimed in claim 4, wherein an air bleed hole (402) is formed in the upper portion of the anchor body, the air bleed hole is communicated with an annular space between the outside of the anchor body and the second constant-pressure sleeve (302) and the anchor body, and a blind plug (401) is connected to an outer opening of the air bleed hole in a threaded mode; the lower opening of the communication hole (304) is connected with a sealing joint (403) in a threaded manner, and hydraulic oil or corrosion inhibitor solution is filled in the closed cavity (404).
6. A double anchored high pressure packer as claimed in claim 4 or 5, characterised in that the second set of constant pressure sleeve (302) and shear pin ring (205) are provided with saw tooth locking threads.
7. A double-anchor high-pressure packer as claimed in claim 1, wherein the constant-pressure mechanism comprises an isolation sleeve (501), the isolation sleeve is coaxially sleeved in the inner holes of the anchor body (1) and the central pipe (9), and the upper end and the lower end of the isolation sleeve are respectively sealed with the anchor body and the central pipe; a piston (303) is coaxially sleeved in the annular space of the anchor body and the isolation sleeve, the inner hole and the periphery of the piston are respectively sealed with the isolation sleeve and the anchor body, and a communicating hole (304) is axially arranged on the body of the piston; a plunger hole is arranged on an upper shaft of a central tube (9) body, a plunger (504) is arranged in the plunger hole, and a pressure guide hole I (502) communicated with the plunger hole and an inner hole of the central tube is radially arranged at the upper end of the plunger hole; an upper sealing ring and a lower sealing ring are arranged at the upper part of the plunger (504), and a right-angle pressure guide hole II (503) is arranged on the central tube body to communicate with an annular space between a lower piston cavity and the upper sealing ring and the lower sealing ring arranged on the plunger; the lower end of the plunger hole is in threaded connection with a threaded sleeve (506), the lower end of the plunger is coaxially sleeved in an inner hole of the threaded sleeve, and a shearing pin (505) is arranged at the sleeved overlapping part of the threaded sleeve and the plunger and penetrates through the threaded sleeve and the plunger in the radial direction.
8. A double-anchoring high-pressure packer as claimed in claim 7, wherein a vent hole (402) is arranged at the upper part of the anchor body, the vent hole is communicated with an annular space between the outside of the anchor body and the isolation sleeve (501) and the anchor body, and a blind plug (401) is connected with an outer opening of the vent hole in a threaded manner; the lower opening of the communication hole (304) is connected with a sealing joint (403) in a threaded manner, and hydraulic oil or corrosion inhibitor solution is filled in the closed cavity (404).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211064021.0A CN115370316B (en) | 2022-09-01 | 2022-09-01 | Double-anchoring high-pressure packer |
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| CN202211064021.0A CN115370316B (en) | 2022-09-01 | 2022-09-01 | Double-anchoring high-pressure packer |
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| CN115370316B CN115370316B (en) | 2024-05-28 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834175A (en) * | 1988-09-15 | 1989-05-30 | Otis Engineering Corporation | Hydraulic versa-trieve packer |
| US20060102338A1 (en) * | 2002-12-06 | 2006-05-18 | Angman Per G | Anchoring device for a wellbore tool |
| CN2841949Y (en) * | 2005-06-29 | 2006-11-29 | 中国石化胜利油田有限公司现河采油厂 | Reverse differential pressure anchor packer |
| CN104806193A (en) * | 2015-05-08 | 2015-07-29 | 中国海洋石油总公司 | Packer |
| CN205000943U (en) * | 2015-08-21 | 2016-01-27 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | But anchor tile modus ponens casing packer |
| CN205977148U (en) * | 2016-08-27 | 2017-02-22 | 江苏力克石油机械有限公司 | From locking -type water conservancy anchor |
| CN210033362U (en) * | 2019-05-14 | 2020-02-07 | 辽宁隆立智能科技有限公司 | High pressure difference step-by-step deblocking packer |
| CN110778287A (en) * | 2019-12-13 | 2020-02-11 | 孙肖 | Use method of double-hydraulic bidirectional anchoring packer |
| CN211174046U (en) * | 2019-12-23 | 2020-08-04 | 惟其信石油机械(天津)有限公司 | Cable passing isolation device in sleeve |
| CN211924128U (en) * | 2020-04-06 | 2020-11-13 | 荆州市赛瑞能源技术有限公司 | Double-piston large-drift-diameter hydraulic recoverable packer |
| CN112554838A (en) * | 2020-12-11 | 2021-03-26 | 惟其信石油机械(天津)有限公司 | High-temperature and high-pressure resistant packer |
| CN213953557U (en) * | 2020-11-09 | 2021-08-13 | 中海石油（中国）有限公司天津分公司 | Hydraulic control annular protection device with anchoring function |
| CN213980717U (en) * | 2020-10-14 | 2021-08-17 | 山东兆鑫石油工具有限公司 | Constant-pressure starting hydraulic anchor |
-
2022
- 2022-09-01 CN CN202211064021.0A patent/CN115370316B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834175A (en) * | 1988-09-15 | 1989-05-30 | Otis Engineering Corporation | Hydraulic versa-trieve packer |
| US20060102338A1 (en) * | 2002-12-06 | 2006-05-18 | Angman Per G | Anchoring device for a wellbore tool |
| CN2841949Y (en) * | 2005-06-29 | 2006-11-29 | 中国石化胜利油田有限公司现河采油厂 | Reverse differential pressure anchor packer |
| CN104806193A (en) * | 2015-05-08 | 2015-07-29 | 中国海洋石油总公司 | Packer |
| CN205000943U (en) * | 2015-08-21 | 2016-01-27 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | But anchor tile modus ponens casing packer |
| CN205977148U (en) * | 2016-08-27 | 2017-02-22 | 江苏力克石油机械有限公司 | From locking -type water conservancy anchor |
| CN210033362U (en) * | 2019-05-14 | 2020-02-07 | 辽宁隆立智能科技有限公司 | High pressure difference step-by-step deblocking packer |
| CN110778287A (en) * | 2019-12-13 | 2020-02-11 | 孙肖 | Use method of double-hydraulic bidirectional anchoring packer |
| CN211174046U (en) * | 2019-12-23 | 2020-08-04 | 惟其信石油机械(天津)有限公司 | Cable passing isolation device in sleeve |
| CN211924128U (en) * | 2020-04-06 | 2020-11-13 | 荆州市赛瑞能源技术有限公司 | Double-piston large-drift-diameter hydraulic recoverable packer |
| CN213980717U (en) * | 2020-10-14 | 2021-08-17 | 山东兆鑫石油工具有限公司 | Constant-pressure starting hydraulic anchor |
| CN213953557U (en) * | 2020-11-09 | 2021-08-13 | 中海石油（中国）有限公司天津分公司 | Hydraulic control annular protection device with anchoring function |
| CN112554838A (en) * | 2020-12-11 | 2021-03-26 | 惟其信石油机械(天津)有限公司 | High-temperature and high-pressure resistant packer |
Non-Patent Citations (1)
| Title |
|---|
| 冯波;郭勇;赵奇祥;石爱华;曹海燕;张志平;: "轴向推进式水力油管锚定器的研制与应用", 石油钻采工艺, vol. 36, no. 06, 30 November 2014 (2014-11-30), pages 112 - 115 * |
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| CN115370316B (en) | 2024-05-28 |
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