CN114439417B - Hydraulic control rubber cylinder type bidirectional well flushing valve and method - Google Patents
Hydraulic control rubber cylinder type bidirectional well flushing valve and method Download PDFInfo
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- CN114439417B CN114439417B CN202011121841.XA CN202011121841A CN114439417B CN 114439417 B CN114439417 B CN 114439417B CN 202011121841 A CN202011121841 A CN 202011121841A CN 114439417 B CN114439417 B CN 114439417B
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 92
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 167
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 21
- 239000003921 oil Substances 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000004576 sand Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a hydraulic control rubber cylinder type bidirectional well flushing valve and a method, wherein the hydraulic control rubber cylinder type bidirectional well flushing valve comprises a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder; the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe; the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially; the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms to block the well flushing channel after being pressed. The invention can effectively avoid the leakage of the well flushing valve caused by corrosion and scaling, can realize the forward and reverse well flushing, ensures the long-term high-efficiency sealing of the bottom of the water injection pipe column and the smooth well flushing, and prolongs the service life of the water injection well.
Description
Technical Field
The invention relates to the technical field of downhole tools for completion construction of offshore oilfield water injection wells, in particular to a hydraulic control rubber cylinder type bidirectional well flushing valve and a method.
Background
The current hydraulic control compression type measuring and adjusting integrated separate injection process is widely popularized and applied to the field of the island of the sea in victory, and the tubular column sequentially comprises the following steps from bottom to top: the hydraulic control system comprises a guide plug, a uniflow valve, an adjustable water distributor, a hydraulic control compression packer, a guide positioner, a safety packer and an underground safety valve, wherein an oil sleeve annulus well control safety tool and a layered packer are respectively a safety packer and a hydraulic control packer, and mainly play roles of oil sleeve annulus safety, layering and well flushing; the safety packer and the hydraulic control packer are connected in series, and 1 hydraulic control pipeline is shared to control the safety of an underground oil sleeve annulus and the working state of the packer and control the opening and closing of a well flushing channel. In the application process, the phenomenon that the bottom check valve is lost due to the fact that a check valve ball made of all metals is not tightly sealed with a ball seat, corrosion and the like is found out, and the bottom measurement and adjustment cannot be implemented, so that the whole pipe column is in split injection failure due to the fact that the check valve ball is influenced by factors such as impurities, acidification, corrosion, scaling, incomplete well flushing and the like along with the extension of time. Because of no proper post-loss treatment means, the well can only be solved by a manner of re-operating the tubular string.
Publication (bulletin) number: CN201386538Y, publication (date): 2010-01-20 discloses a hydraulic control two-way valve group, includes sand setting device and two-way valve, and its characterized in that sand setting device is connected with the two-way valve, sand setting device includes the outer tube and installs jump ring, valve cover, disk seat and the valve ball in proper order in with in, the two-way valve includes valve body and inner chamber installs in proper order and sticiss pipe, traveling valve seat, spring group, bottom support in advance, installs traveling valve ball on the traveling valve seat in advance, installs locating gland in the pipe in advance. The device has multiple functions, and can realize forward and reverse circulation under the control of liquid flow; when the device is used for petroleum exploitation, forward and reverse well flushing can be performed; the sand setting device is matched, so that the two-way valve sand can be prevented from being blocked; high service efficiency, long service life and the like, and can be widely applied to petroleum extraction processes.
Publication (bulletin) number: CN210068081U, publication (date): 2020-02-14 provide a bi-directional well cleanup valve comprising: the lower joint is in a cylindrical structure with two open ends, and a washing hole is arranged on the pipe wall of the lower joint; a ball seat having an axial fluid passage, the ball seat being slidably disposed within the lower sub and capable of closing the wellbore; the elastic element is arranged in the lower joint, one end of the elastic element is connected with the ball seat, and the other end of the elastic element is connected with the lower end of the lower joint; the upper joint is of a cylindrical structure with two open ends, the lower end of the upper joint is connected with the upper end of the lower joint, the upper end of the upper joint is provided with a porous baffle, and a containing space for containing the valve ball is formed between the porous baffle and the ball seat. Can realize two-way well flushing, has more thorough flushing, long effective period, high utilization rate of well flushing liquid and small damage to a pump.
Publication (bulletin) number: CN207093001U, publication (date): 2018-03-13 discloses a bidirectional circulating well flushing valve, which comprises an upper joint, a sliding sleeve, a lower joint and a shear pin, wherein an upper bypass hole is formed in the side wall of the upper joint, a lower bypass hole is formed in the side wall of the lower joint, an inner through hole is formed in the side wall of the sliding sleeve, the inner through hole is overlapped and communicated with the lower bypass hole when the sliding sleeve moves down on the shoulder of the lower joint, a plurality of O-shaped sealing rings are arranged on the outer wall of the sliding sleeve and used for sealing between the sliding sleeve and the upper joint and the lower joint when the well flushing valve is closed, the upper bypass hole and the lower bypass hole are blocked and sealed by the sliding sleeve in the well flushing valve closing state, and the top of the sliding sleeve slides down to the lower side hole when the well flushing valve is opened, so that the upper bypass hole is communicated with the inner cavity of the well flushing valve, and the lower bypass hole are overlapped and communicated with the inner cavity of the well flushing valve. The device has a simple and reasonable structure, can effectively realize a bidirectional function, can meet the function of circulating well flushing after the test is finished, and can also meet the function of balancing the up-down pressure difference of the packer when the packer is unpacked.
In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the generated beneficial effects are different from those of the present invention, or the technical field or application occasion is different, and the technical documents disclosed above do not have technical teaching aiming at more technical features of the present invention, the technical problems to be solved and the beneficial effects.
Disclosure of Invention
The invention aims to provide the hydraulic control rubber cylinder type bidirectional well flushing valve and the method thereof aiming at the defects in the prior art, which can effectively avoid well flushing valve leakage caused by corrosion and scaling, can realize forward and reverse bidirectional well flushing, ensure long-term high-efficiency sealing of the bottom of a water injection pipe column and smooth well flushing, and prolong the service life of a water injection well.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a hydraulic control rubber cylinder type bidirectional well flushing valve comprises a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder;
the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe;
the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms to block the well flushing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary hydraulic cylinder and a sealing connecting sleeve;
the secondary hydraulic cylinder is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central tube;
the inner wall of the secondary hydraulic cylinder and the outer wall of the central tube form a second inner annular space, a second outer annular space is formed between the outer wall of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, the lower end of the secondary hydraulic cylinder presses the upper end of the sealing rubber cylinder, the inner diameter of the sealing rubber cylinder is consistent with the outer diameter of the central tube, and the outer diameter of the sealing rubber cylinder is smaller than the inner diameter of the sealing connecting sleeve.
Further, the central tube is provided with a central tube radial hole, the central tube radial hole enables the inner cavity of the central tube to be communicated with the second inner annular space, the second-stage hydraulic cylinder is provided with a hydraulic cylinder radial hole, the second inner annular space is communicated with the second outer annular space, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the connecting sleeve radial hole enables the second outer annular space to be communicated with the outside of the sealing connecting sleeve; the radial hole of the connecting sleeve is arranged at a position lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the hydraulic cylinder radial hole, the second outer annular space and the connecting sleeve radial hole form the well flushing channel which is communicated radially.
Further, the lower end of the central tube is connected with the lower joint in a threaded manner, and the lower end of the sealing connecting sleeve is connected with the lower joint in a threaded manner and is provided with an anti-rotation pin; the lower end face of the sealing rubber cylinder is propped against the upper end face of the lower connector.
Further, a sealing ring is arranged between the outer wall of the upper end part of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, and a sealing ring is arranged between the inner wall of the upper end part of the secondary hydraulic cylinder and the outer wall of the central tube; the inner wall of the sealing connecting sleeve is provided with an inward shrinking ring table, and the lower end surface of the inward shrinking ring table can axially limit the upper end surface of the secondary hydraulic cylinder.
Further, the primary hydraulic control mechanism comprises an upper joint, a primary hydraulic cylinder and a return spring;
the upper joint is simultaneously connected with the central pipe and the sealing connecting sleeve, and the primary hydraulic cylinder is arranged in a cavity between the inner wall of the lower half section of the upper joint and the outer wall of the central pipe;
the inner wall of the primary hydraulic cylinder and the outer wall of the central pipe form a first annular space, and the lower end surface of the primary hydraulic cylinder is pressed on the upper end surface of the secondary hydraulic cylinder;
the return spring is sleeved outside the primary hydraulic cylinder, the lower end of the return spring is propped against the upper end face of the sealing connecting sleeve, and the upper end of the return spring is propped against the lower end face of the outer expanding ring table arranged on the outer wall of the primary hydraulic cylinder.
Further, the upper joint is provided with an axial eccentric hydraulic channel, the upper end of the hydraulic channel is communicated with the outside of the upper joint, the lower end of the hydraulic channel is communicated to the upper end surface of the primary hydraulic cylinder, and meanwhile, a pressure transmission gap is formed between the axial upper end surface of the primary hydraulic cylinder and the upper joint and is communicated with the hydraulic channel of the upper joint.
Further, a sealing ring is arranged between the outer wall of the upper end part of the primary hydraulic cylinder and the inner wall of the upper joint, and a sealing ring is arranged between the outer wall of the lower end part of the primary hydraulic cylinder and the inner wall of the upper end part of the sealing connecting sleeve.
Further, the upper end of the upper joint is connected with a coupling.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the application method of the hydraulic control rubber cylinder type bidirectional well flushing valve comprises the following steps:
the well flushing valve closing process: connecting the hydraulic control rubber barrel type well flushing valve in a tubular column and putting the tubular column into a well; through the pressurizing of the hydraulic control pipeline, hydraulic oil flows into the hydraulic channel through the upper joint, the hydraulic oil pushes the sealing ring of the upper end surface of the primary hydraulic cylinder to prevent the hydraulic oil from flowing into the oil pipe, the sealing ring can prevent the hydraulic oil from flowing into the space of the return spring, and the pressure of the hydraulic oil is ensured to push the upper end surface of the primary hydraulic cylinder; the first-stage hydraulic cylinder compresses the return spring and moves axially downwards to push the second-stage hydraulic cylinder; the hydraulic oil flows downwards through the inner ring of the primary hydraulic cylinder to push the upper end surface of the secondary hydraulic cylinder, the secondary hydraulic cylinder moves downwards along the axial direction to push the compression rubber cylinder, the compression rubber cylinder compresses and expands, the annular space inside the sealing connecting sleeve is sealed, and the well flushing valve is closed at the moment and can normally inject water;
the opening process of the well flushing valve comprises the following steps: the hydraulic oil is decompressed, the primary hydraulic cylinder moves upwards to reset under the pushing of the reset spring, the secondary hydraulic cylinder moves upwards to reset under the action of the resilience force of the compression rubber cylinder, the compression rubber cylinder retracts to reset, and the well flushing channel is opened;
the well flushing process comprises the following steps: the central pipe is provided with holes at the annular space positions corresponding to the secondary hydraulic cylinders, the secondary hydraulic cylinders are provided with holes at the annular space positions corresponding to the inner side and the outer side of the secondary hydraulic cylinders, the sealing connecting sleeve is provided with holes at the annular space positions corresponding to the lower joint, and the three holes and the two annular spaces form an oil pipe inner and outer communicating channel together, so that the forward and backward well flushing can be realized.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through radial punching on the central pipe, the secondary piston and the sealing connecting sleeve, the communication channels inside and outside the oil pipe are preset, the independent hydraulic control pipeline pressurizing channel is arranged, the compression and recovery states of the sealing rubber cylinder are controlled, the opening and closing control of the channels inside and outside the oil pipe is realized, and finally, the opening and closing of the well flushing channel of the well flushing valve can be controlled through ground pressurizing; when hydraulic pressure is applied to the hydraulic control pipeline, the primary piston is pushed to compress the reset spring, the secondary piston is further pushed to move downwards to seal the rubber cylinder, the rubber cylinder is compressed and expanded, the well flushing channel is closed, and normal water injection is carried out in the state; when the well is required to be washed, the pressure in the hydraulic pipeline is relieved, the first-stage hydraulic cylinder is returned to the original position upwards by the return spring, the rubber cylinder is contracted and returned under the self elastic action, and the well washing channel is opened. The invention provides a brand new design concept, and the conventional metal seal is changed into the rubber seal, so that the sealing is more reliable and is not influenced by corrosion, scaling, impurities and incomplete well flushing; the dynamic pressure compensation can be carried out according to the water injection pressure change and the working condition conversion, so that the requirement of high-efficiency plugging of the bottom of the long-life water flooding development is met; after the pressure of the ground hydraulic control system of the well flushing valve is relieved, the intervention of the reset spring accelerates the retraction of the rubber cylinder, so that the positive and reverse flushing functions of thorough and smooth large discharge capacity are realized.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic control rubber cylinder type bidirectional well flushing valve.
In the figure: the device comprises a joint hoop 1, an upper joint 2, a sealing ring 3, a sealing ring 4, a primary hydraulic cylinder 5, a return spring 6, a central tube 7, a sealing ring 8, a sealing ring 9, a sealing ring 10, a sealing connecting sleeve 11, a secondary hydraulic cylinder 12, a sealing rubber cylinder 13, an anti-rotation pin 14 and a lower joint 15.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the present invention provides a technical solution:
a hydraulic control rubber cylinder type bidirectional well flushing valve comprises a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder 13;
the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe 7;
the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms to block the well flushing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary hydraulic cylinder 12 and a sealing connecting sleeve 11;
the secondary hydraulic cylinder is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central tube;
the inner wall of the secondary hydraulic cylinder and the outer wall of the central tube form a second inner annular space, a second outer annular space is formed between the outer wall of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, the lower end of the secondary hydraulic cylinder presses the upper end of the sealing rubber cylinder, the inner diameter of the sealing rubber cylinder is consistent with the outer diameter of the central tube, and the outer diameter of the sealing rubber cylinder is smaller than the inner diameter of the sealing connecting sleeve.
Further, the central tube is provided with a central tube radial hole, the central tube radial hole enables the inner cavity of the central tube to be communicated with the second inner annular space, the second-stage hydraulic cylinder is provided with a hydraulic cylinder radial hole, the second inner annular space is communicated with the second outer annular space, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the connecting sleeve radial hole enables the second outer annular space to be communicated with the outside of the sealing connecting sleeve; the radial hole of the connecting sleeve is arranged at a position lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the hydraulic cylinder radial hole, the second outer annular space and the connecting sleeve radial hole form the well flushing channel which is communicated radially.
Further, the lower end of the central tube is connected with the lower joint in a threaded manner, and the lower end of the sealing connecting sleeve is connected with the lower joint in a threaded manner and is provided with an anti-rotation pin; the lower end face of the sealing rubber cylinder is propped against the upper end face of the lower connector.
Further, a sealing ring is arranged between the outer wall of the upper end part of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, and a sealing ring is arranged between the inner wall of the upper end part of the secondary hydraulic cylinder and the outer wall of the central tube; the inner wall of the sealing connecting sleeve is provided with an inward shrinking ring table, and the lower end surface of the inward shrinking ring table can axially limit the upper end surface of the secondary hydraulic cylinder.
Further, the primary hydraulic control mechanism comprises an upper joint 2, a primary hydraulic cylinder 5 and a return spring 6;
the upper joint is simultaneously connected with the central pipe and the sealing connecting sleeve, and the primary hydraulic cylinder is arranged in a cavity between the inner wall of the lower half section of the upper joint and the outer wall of the central pipe;
the inner wall of the primary hydraulic cylinder and the outer wall of the central pipe form a first annular space, and the lower end surface of the primary hydraulic cylinder is pressed on the upper end surface of the secondary hydraulic cylinder;
the return spring is sleeved outside the primary hydraulic cylinder, the lower end of the return spring is propped against the upper end face of the sealing connecting sleeve, and the upper end of the return spring is propped against the lower end face of the outer expanding ring table arranged on the outer wall of the primary hydraulic cylinder.
Further, the upper joint is provided with an axial eccentric hydraulic channel, the upper end of the hydraulic channel is communicated with the outside of the upper joint, the lower end of the hydraulic channel is communicated to the upper end surface of the primary hydraulic cylinder, and meanwhile, a pressure transmission gap is formed between the axial upper end surface of the primary hydraulic cylinder and the upper joint and is communicated with the hydraulic channel of the upper joint.
Further, a sealing ring is arranged between the outer wall of the upper end part of the primary hydraulic cylinder and the inner wall of the upper joint, and a sealing ring is arranged between the outer wall of the lower end part of the primary hydraulic cylinder and the inner wall of the upper end part of the sealing connecting sleeve.
Further, the upper end of the upper joint is connected with the coupling 1.
The lower end of the joint hoop 1 is connected with the top of the upper joint 2 by screw threads;
the inner side of the upper joint 2 is connected with the top of the outer side of the central tube 7 by adopting threads, and the upper part of the threads is sealed by a sealing ring 3; the outer side of the upper joint 2 is axially provided with a hydraulic pipeline connecting hole and a hydraulic channel; the lower end of the upper joint 2 is in threaded connection with the sealing connecting sleeve 11 through internal threads;
the outer side of the upper end of the central tube 7 is connected with the inner side of the upper joint 2 through threads, the lower end of the central tube 7 is connected with the lower joint 15 through threads, the upper joint 2, the primary hydraulic cylinder 5, the secondary hydraulic cylinder 12, the sealing rubber cylinder 13 and the lower joint 15 are axially arranged from top to bottom on the outer side of the central tube 7, wherein the primary hydraulic cylinder 5, the secondary hydraulic cylinder 12 and the sealing rubber cylinder are moving parts; the part of the central tube 7 coaxially opposite to the secondary hydraulic cylinder 12 is provided with 4 radial holes;
the radial inner side of the primary hydraulic cylinder 5 is a central pipe 7, and an annular gap exists between the primary hydraulic cylinder and the central pipe 7; the radial outer side of the primary hydraulic cylinder 5 is provided with a return spring 6. The upper side of the primary hydraulic cylinder 5 in the axial direction is provided with an upper joint 2, and a gap is reserved between the primary hydraulic cylinder and the upper joint 2, and the gap is communicated with a hydraulic channel of the upper joint 2; the outer side of a radial outer side return spring 6 of the primary hydraulic cylinder 5 is the outer wall of the upper joint 2, and the primary hydraulic cylinder 5 and the outer wall of the upper joint 2 are sealed by two sealing rings 4; the lower axial end of the primary hydraulic cylinder 5 is contacted with the secondary hydraulic cylinder 12, and the outer side of the lower end of the primary hydraulic cylinder 5 is sealed with the sealing connecting sleeve 11 through two sealing rings 8;
the axial upper end of the return spring 6 is a primary hydraulic cylinder 5, the axial lower end of the return spring is the upper end of a sealing connecting sleeve 11, the radial outer side of the return spring is the outer wall of the upper joint 2, and the radial inner side of the return spring is the primary hydraulic cylinder 5;
the inner side of the upper end of the secondary hydraulic cylinder 12 is sealed with the central tube 7 through two sealing rings 9, an annular space exists between the radial inner side of the secondary hydraulic cylinder 12 and the central tube 7, and the annular space is always opposite to an opening on the central tube 7 when the secondary hydraulic cylinder 12 axially displaces; the outer side of the upper end of the secondary hydraulic cylinder 12 is sealed with a sealing connecting sleeve 11 through two sealing rings 10, and an annular space exists between the radial outer side of the secondary hydraulic cylinder and the sealing connecting sleeve 11; the two-stage hydraulic cylinder 12 is provided with 4 radial holes in the circumferential direction; the lower end of the secondary hydraulic cylinder 12 is contacted with a sealing rubber cylinder;
the radial inner side of the sealing rubber cylinder is a central tube 7, the radial outer side of the sealing rubber cylinder is a sealing connecting sleeve 11, and an annular space is reserved between the sealing rubber cylinder and the sealing connecting sleeve 11; the upper axial end of the sealing rubber cylinder is a secondary hydraulic cylinder 12, and the lower axial end of the sealing rubber cylinder is a lower joint 15;
the upper end of the sealing connecting sleeve 11 is contacted with the return spring 6, the outer side of the sealing connecting sleeve is connected with the upper joint 2 through threads, and the inner side of the upper end of the sealing connecting sleeve is from top to bottom: the two sealing rings 8 are in sealing contact with the primary hydraulic cylinder 5, the two sealing rings 10 are in sealing contact with the secondary hydraulic cylinder 12, the inner side of the annular space is provided with a sealing rubber cylinder, and the sealing rubber cylinder is connected with the lower joint 15 through an anti-rotation pin 14; the sealing connecting sleeve 11 is provided with 4 radial holes uniformly distributed in the circumferential direction at the position axially corresponding to the lower joint 15; the radial inner side of the sealing connecting sleeve 11 is an annular space, and the axial inner side of the annular space is sequentially provided with a secondary hydraulic cylinder 12, a sealing rubber cylinder and a lower joint 15 from top to bottom;
the top end of the upper end of the lower joint 15 is contacted with a sealing rubber cylinder, the inner side of the upper end of the lower joint is connected with the central tube 7 through internal threads, and the outer side of the upper end is opposite to a radial opening of the sealing connecting sleeve 11 in an annular space; the outer side of the lower joint 15 is connected with the sealing connecting sleeve 11 through an anti-rotation pin; the outer side of the lower end of the lower joint 15 is provided with threads, and the lower joint can be connected with other downhole tools or oil pipes.
The specific application method of the invention comprises the following steps: as shown in fig. 1.
The well flushing valve closing process: the hydraulic control rubber barrel type well flushing valve is connected in a pipe column and is put into a well. Through hydraulic control pipeline pressurizing, hydraulic oil flows into a hydraulic channel through the upper joint 2, the hydraulic oil pushes the sealing ring 3 on the upper end surface of the primary hydraulic cylinder 5 to prevent the hydraulic oil from flowing into an oil pipe, the sealing ring 4 can prevent the hydraulic oil from flowing into a return spring space, and the pressure of the hydraulic oil is ensured to push the upper end surface of the primary hydraulic cylinder 5; the primary hydraulic cylinder 5 compresses the return spring 6 and moves axially downwards to push the secondary hydraulic cylinder 12; the hydraulic oil flows downwards through the inner ring of the primary hydraulic cylinder 5 to push the upper end face of the secondary hydraulic cylinder 12, the secondary hydraulic cylinder 12 moves downwards along the axial direction to push the sealing rubber cylinder 13, the sealing rubber cylinder 13 compresses and expands, the annular space inside the sealing connecting sleeve 11 is closed, and the well flushing valve is closed at the moment and can be used for normally injecting water.
The opening process of the well flushing valve comprises the following steps: the hydraulic oil is decompressed, the primary hydraulic cylinder 5 moves upwards to reset under the pushing of the reset spring 6, the secondary hydraulic cylinder 12 moves upwards to reset under the action of the resilience force of the sealing rubber cylinder 13, the sealing rubber cylinder 13 retracts to reset, and a well flushing channel is opened.
The well flushing process comprises the following steps: the central tube 7 is provided with holes at annular space positions corresponding to the secondary hydraulic cylinder 12, the secondary hydraulic cylinder 12 is provided with holes at annular space positions corresponding to the inner side and the outer side, the sealing connecting sleeve 11 is provided with holes at annular space positions corresponding to the lower joint, and the three holes and the two annular spaces form an oil pipe inner and outer communicating channel together, so that the forward and backward well flushing can be realized.
The central tube 7, the secondary hydraulic cylinder 12 and the sealing connecting sleeve 11 are all provided with holes uniformly distributed in the circumferential direction, the number of the holes is beneficial to 4, and the specific number can be adjusted.
The invention adopts the independent single hydraulic control pipeline channel, and the hydraulic pressure is utilized to push the piston sealing rubber cylinder to close the well flushing channel; after pressure relief, the piston is pushed to return by a spring mechanism, the rubber cylinder is retracted, and the well flushing channel is opened; the hydraulic control rubber drum type well flushing valve can be used together with a hydraulic control packer, one hydraulic control pipeline simultaneously controls the hydraulic control packer and the well flushing valve, meanwhile, packer setting and well flushing valve sealing are achieved, after the hydraulic control pipeline is depressurized, the packer is unsealed, the well flushing valve is opened, forward and reverse bidirectional well flushing can be achieved, the hydraulic control rubber drum type well flushing valve can be controlled by a ground control switch, pressure compensation can be carried out at any time according to stratum pressure to ensure that the bottom of a pipe column is not lost, and corrosion and scaling phenomena of a metal valve ball type well flushing valve can be effectively avoided.
In a word, the invention provides the hydraulic control rubber barrel type well flushing valve utilizing the original pipe column hydraulic control system, which can effectively avoid well flushing valve leakage caused by corrosion and scaling, can also realize positive and negative bidirectional well flushing, ensures long-term high-efficiency sealing of the bottom of the water injection pipe column and smooth well flushing, prolongs the service life of the water injection well, and has application value.
Example 2
Referring to fig. 1, the present invention provides a technical solution:
a hydraulic control rubber cylinder type bidirectional well flushing valve comprises a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder 13;
the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe 7;
the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms to block the well flushing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary hydraulic cylinder 12 and a sealing connecting sleeve 11;
the secondary hydraulic cylinder is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central tube;
the inner wall of the secondary hydraulic cylinder and the outer wall of the central tube form a second inner annular space, a second outer annular space is formed between the outer wall of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, the lower end of the secondary hydraulic cylinder presses the upper end of the sealing rubber cylinder, the inner diameter of the sealing rubber cylinder is consistent with the outer diameter of the central tube, and the outer diameter of the sealing rubber cylinder is smaller than the inner diameter of the sealing connecting sleeve.
Further, the central tube is provided with a central tube radial hole, the central tube radial hole enables the inner cavity of the central tube to be communicated with the second inner annular space, the second-stage hydraulic cylinder is provided with a hydraulic cylinder radial hole, the second inner annular space is communicated with the second outer annular space, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the connecting sleeve radial hole enables the second outer annular space to be communicated with the outside of the sealing connecting sleeve; the radial hole of the connecting sleeve is arranged at a position lower than the lower end surface of the sealing rubber cylinder; the radial hole of the central pipe, the radial hole of the first inner annulus, the radial hole of the second hydraulic cylinder, the radial hole of the second outer annulus and the radial hole of the connecting sleeve form the well flushing channel which is communicated radially.
Further, the lower end of the central tube is connected with the lower joint in a threaded manner, and the lower end of the sealing connecting sleeve is connected with the lower joint in a threaded manner and is provided with an anti-rotation pin; the lower end face of the sealing rubber cylinder is propped against the upper end face of the lower connector.
Further, a sealing ring is arranged between the outer wall of the upper end part of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, and a sealing ring is arranged between the inner wall of the upper end part of the secondary hydraulic cylinder and the outer wall of the central tube; the inner wall of the sealing connecting sleeve is provided with an inward shrinking ring table, and the lower end surface of the inward shrinking ring table can axially limit the upper end surface of the secondary hydraulic cylinder.
Example 3
Referring to fig. 1, the present invention provides a technical solution:
a hydraulic control rubber cylinder type bidirectional well flushing valve comprises a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder 13;
the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe 7;
the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms to block the well flushing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary hydraulic cylinder 12 and a sealing connecting sleeve 11;
the secondary hydraulic cylinder is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central tube;
the inner wall of the secondary hydraulic cylinder and the outer wall of the central tube form a second inner annular space, a second outer annular space is formed between the outer wall of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, the lower end of the secondary hydraulic cylinder presses the upper end of the sealing rubber cylinder, the inner diameter of the sealing rubber cylinder is consistent with the outer diameter of the central tube, and the outer diameter of the sealing rubber cylinder is smaller than the inner diameter of the sealing connecting sleeve.
Although all of the above embodiments use fig. 1, it will be apparent to those skilled in the art that a separate drawing is not provided to illustrate the embodiments, so long as the missing components or structural features are removed from the drawing. As will be clear to a person skilled in the art. Of course, the more specific parts are the preferred embodiments, the less specific parts are the basic embodiments, but the basic objects of the invention can be achieved, so all the modified embodiments are within the scope of the invention.
In this application, all parts which are not discussed are known in the art, and the connection manner of all parts in this application is not described in detail. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The hydraulic control rubber cylinder type bidirectional well flushing valve is characterized by comprising a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder;
the primary hydraulic control mechanism, the secondary hydraulic control mechanism and the sealing rubber cylinder are sleeved outside the central pipe;
the upper end of the secondary hydraulic control mechanism is connected with the primary hydraulic control mechanism and is subjected to axial pressure of the primary hydraulic control mechanism, and the secondary hydraulic control mechanism and the central pipe are simultaneously provided with a well flushing channel which is communicated radially;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder is deformed to block the well flushing channel after being pressed;
the inner wall of the sealing connecting sleeve is provided with an inward shrinkage ring table, and the lower end surface of the inward shrinkage ring table can axially limit the upper end surface of the secondary hydraulic cylinder;
the secondary hydraulic control mechanism comprises a secondary hydraulic cylinder and a sealing connecting sleeve;
the secondary hydraulic cylinder is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central tube;
the inner wall of the secondary hydraulic cylinder and the outer wall of the central tube form a second inner annular space, a second outer annular space is formed between the outer wall of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, the lower end of the secondary hydraulic cylinder presses the upper end of the sealing rubber cylinder, the inner diameter of the sealing rubber cylinder is consistent with the outer diameter of the central tube, and the outer diameter of the sealing rubber cylinder is smaller than the inner diameter of the sealing connecting sleeve;
the central tube is provided with a central tube radial hole, the central tube radial hole enables the inner cavity of the central tube to be communicated with the second inner annular space, the second-stage hydraulic cylinder is provided with a hydraulic cylinder radial hole, the hydraulic cylinder radial hole enables the second inner annular space to be communicated with the second outer annular space, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the connecting sleeve radial hole enables the second outer annular space to be communicated with the outside of the sealing connecting sleeve; the radial hole of the connecting sleeve is arranged at a position lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the second inner annular space, the hydraulic cylinder radial hole, the second outer annular space and the connecting sleeve radial hole form a well flushing channel which is communicated radially;
the lower end of the central tube is connected with the lower joint in a threaded manner, and the lower end of the sealing connecting sleeve is connected with the lower joint in a threaded manner and is provided with an anti-rotation pin; the lower end face of the sealing rubber cylinder is propped against the upper end face of the lower joint;
the primary hydraulic control mechanism comprises an upper joint, a primary hydraulic cylinder and a return spring;
the upper joint is simultaneously connected with the central pipe and the sealing connecting sleeve, and the primary hydraulic cylinder is arranged in a cavity between the inner wall of the lower half section of the upper joint and the outer wall of the central pipe;
the inner wall of the primary hydraulic cylinder and the outer wall of the central pipe form a first annular space, and the lower end surface of the primary hydraulic cylinder is pressed on the upper end surface of the secondary hydraulic cylinder;
the reset spring is sleeved outside the primary hydraulic cylinder, the lower end of the reset spring is propped against the upper end face of the sealing connecting sleeve, and the upper end of the reset spring is propped against the lower end face of the outer expanding ring table arranged on the outer wall of the primary hydraulic cylinder;
the upper joint is provided with an axial eccentric hydraulic channel, the upper end of the hydraulic channel is communicated with the outside of the upper joint, the lower end of the hydraulic channel is communicated to the upper end surface of the primary hydraulic cylinder, and meanwhile, a pressure transmission gap is formed between the axial upper end surface of the primary hydraulic cylinder and the upper joint and is communicated with the hydraulic channel of the upper joint.
2. The hydraulic control rubber cylinder type bidirectional flushing valve according to claim 1, wherein a sealing ring is arranged between the outer wall of the upper end part of the secondary hydraulic cylinder and the inner wall of the sealing connecting sleeve, and a sealing ring is arranged between the inner wall of the upper end part of the secondary hydraulic cylinder and the outer wall of the central pipe.
3. The hydraulic control rubber cylinder type bidirectional flushing valve of claim 1, wherein a sealing ring is arranged between the outer wall of the upper end part of the primary hydraulic cylinder and the inner wall of the upper joint, and a sealing ring is arranged between the outer wall of the lower end part of the primary hydraulic cylinder and the inner wall of the upper end part of the sealing connecting sleeve.
4. The hydraulic control rubber type bidirectional flushing valve of claim 1, wherein the upper end of the upper joint is connected with a coupling.
5. A method of using the hydraulically controlled packing element type bi-directional well cleanup valve of claim 1, comprising the steps of:
the well flushing valve closing process: connecting the hydraulic control rubber barrel type well flushing valve in a tubular column and putting the tubular column into a well; through the hydraulic control pipeline pressurizing, hydraulic oil flows into the hydraulic channel through the upper joint, the hydraulic oil pushes the upper end face of the primary hydraulic cylinder, the sealing ring can prevent the hydraulic oil from flowing into the oil pipe, the sealing ring can prevent the hydraulic oil from flowing into the space of the return spring, and the pressure of the hydraulic oil is ensured to push the upper end face of the primary hydraulic cylinder; the first-stage hydraulic cylinder compresses the return spring and moves axially downwards to push the second-stage hydraulic cylinder; the hydraulic oil flows downwards through the inner ring of the primary hydraulic cylinder to push the upper end surface of the secondary hydraulic cylinder, the secondary hydraulic cylinder moves downwards along the axial direction to push the compression rubber cylinder, the compression rubber cylinder compresses and expands, the annular space inside the sealing connecting sleeve is sealed, and the well flushing valve is closed at the moment and can normally inject water;
the opening process of the well flushing valve comprises the following steps: the hydraulic oil is decompressed, the primary hydraulic cylinder moves upwards to reset under the pushing of the reset spring, the secondary hydraulic cylinder moves upwards to reset under the action of the resilience force of the compression rubber cylinder, the compression rubber cylinder retracts to reset, and the well flushing channel is opened;
the well flushing process comprises the following steps: the central pipe is provided with holes at the annular space positions corresponding to the secondary hydraulic cylinders, the secondary hydraulic cylinders are provided with holes at the annular space positions corresponding to the inner side and the outer side of the secondary hydraulic cylinders, the sealing connecting sleeve is provided with holes at the annular space positions corresponding to the lower joint, and the three holes and the two annular spaces form an oil pipe inner and outer communicating channel together, so that the forward and backward well flushing can be realized.
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| CN202011121841.XA CN114439417B (en) | 2020-10-19 | 2020-10-19 | Hydraulic control rubber cylinder type bidirectional well flushing valve and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2007113236A (en) * | 2007-04-10 | 2008-10-27 | Владимир Васильевич Филин (RU) | WASHING VALVE |
| RU2405914C1 (en) * | 2009-09-07 | 2010-12-10 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Method and device for well flushing |
| RU111577U1 (en) * | 2011-05-13 | 2011-12-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | WASHING VALVE |
| CN205638295U (en) * | 2016-05-16 | 2016-10-12 | 金湖县支点石油科技有限责任公司 | Control by temperature change well -flushing ware |
| CN111075385A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Single-pipe double-control safe well-flushing packer |
| CN211549659U (en) * | 2019-10-24 | 2020-09-22 | 中国石油化工股份有限公司 | Long-life water injection string of offshore oil field |
-
2020
- 2020-10-19 CN CN202011121841.XA patent/CN114439417B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2007113236A (en) * | 2007-04-10 | 2008-10-27 | Владимир Васильевич Филин (RU) | WASHING VALVE |
| RU2405914C1 (en) * | 2009-09-07 | 2010-12-10 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Method and device for well flushing |
| RU111577U1 (en) * | 2011-05-13 | 2011-12-20 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | WASHING VALVE |
| CN205638295U (en) * | 2016-05-16 | 2016-10-12 | 金湖县支点石油科技有限责任公司 | Control by temperature change well -flushing ware |
| CN111075385A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Single-pipe double-control safe well-flushing packer |
| CN211549659U (en) * | 2019-10-24 | 2020-09-22 | 中国石油化工股份有限公司 | Long-life water injection string of offshore oil field |
Non-Patent Citations (1)
| Title |
|---|
| 闭式采油高效热洗装置设计应用;贾中等;《内蒙古石油化工》;20121231(第15期);第26-27页 * |
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