CN114439417A - 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
- Publication number
- CN114439417A CN114439417A CN202011121841.XA CN202011121841A CN114439417A CN 114439417 A CN114439417 A CN 114439417A CN 202011121841 A CN202011121841 A CN 202011121841A CN 114439417 A CN114439417 A CN 114439417A
- Authority
- CN
- China
- Prior art keywords
- hydraulic control
- cylinder
- sealing
- hydraulic
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 42
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 160
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 238000005406 washing Methods 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 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
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000004576 sand Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method 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
- 210000004907 gland Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- 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, comprising a primary hydraulic control mechanism, a secondary hydraulic control mechanism and a sealing rubber cylinder; the first-stage hydraulic control mechanism, the second-stage hydraulic control mechanism and the sealing rubber cylinder are all sleeved outside the central pipe; the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated; the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed. The invention can effectively avoid the leakage of the well washing valve caused by corrosion and scaling, can realize positive and negative bidirectional well washing, ensures the long-term efficient sealing of the bottom of the water injection pipe column and the smooth well washing, and prolongs the service life of the water injection well.
Description
Technical Field
The invention relates to the technical field of downhole tools for well completion construction of water injection wells of offshore oil fields, in particular to a hydraulic control rubber cylinder type bidirectional well flushing valve and a method.
Background
The present hydraulic control compression type integrated testing and adjusting separate injection process is popularized and applied in a large area in the field of the Chengli offshore Chengqi field, and the pipe column is from bottom to top in sequence: the downhole safety device comprises a guide plug, a check valve, an adjustable water distributor, a hydraulic control compression packer, a guide positioner, a safety packer and a downhole safety valve, wherein an oil sleeve annulus well control safety tool and a layering packer are respectively a safety packer and a hydraulic control packer and mainly play roles in oil sleeve annulus safety, layering and well flushing; the safety packer and the hydraulic control packer are connected in series, 1 hydraulic control pipeline is shared to control the safety of the underground oil sleeve annulus and the working state of the packer, and the opening and closing of a well flushing channel are controlled. In the application process, the fact that as time is prolonged, due to the influences of factors such as impurities, acidification, corrosion, scaling and incomplete well washing, the check valve ball and the ball seat which are made of all metals are not tightly sealed and corroded to cause leakage of the check valve at the bottom, and bottom measurement and adjustment cannot be implemented to cause the integral separate injection failure of the pipe column. Without proper post-leak treatment, this type of well can only be addressed by tubular string workovers.
Publication (bulletin) No.: CN201386538Y, publication (public notice) day: 2010-01-20 discloses a hydraulic control two-way valve group, including sand setting ware and two-way valve, its characterized in that sand setting ware is connected with the two-way valve, the sand setting ware includes outer tube and jump ring, valve bonnet, disk seat and the valve ball of installing in order in it, the two-way valve includes that valve body and inner chamber thereof install pretension in order and press the pipe, the disk seat that moves about, spring group, bottom sprag, move about and install the valve ball on the disk seat that moves about, pretension presses and installs positioning gland on the pipe. The multifunctional liquid flow control device has multiple functions and can realize forward and reverse flow under the control of liquid flow; when the device is used for oil exploitation, forward and reverse well washing can be carried out; the sand setting devices are matched, so that sand jamming and blockage of the two-way valve can be prevented; high use efficiency, long service life and the like, and is widely applied to the petroleum production process.
Publication (bulletin) No.: CN210068081U, publication (public notice) day: 2020-02-14 provides a bi-directional well-flushing valve, comprising: the lower joint is of a cylindrical structure with two open ends, and a well washing hole is arranged on the pipe wall of the lower joint; the ball seat is provided with an axial liquid through hole, can be arranged in the lower joint in a sliding mode and can seal the well washing hole; 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 tubular structure with two open ends, the lower end of the upper joint is connected with the upper end of the lower joint, a porous baffle plate is arranged at the upper end of the upper joint, and a containing space for containing a valve ball is formed between the porous baffle plate and the ball seat. The bidirectional well flushing can be realized, the flushing is more thorough, the effective period is long, the utilization rate of the well flushing liquid is high, and the damage to the pump is small.
Publication (bulletin) No.: CN207093001U, publication (public notice) day: 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, an upper bypass hole is arranged on the side wall of the upper joint, a lower bypass hole is arranged on the side wall of the lower joint, an inner through hole is arranged on the side wall of the sliding sleeve, when the inner through hole is positioned on the shoulder of the lower joint and the sliding sleeve moves downwards, the inner through hole is overlapped and communicated with the lower bypass hole, a plurality of O-shaped sealing rings are arranged on the outer wall of the sliding sleeve and are used for sealing the sliding sleeve and the upper joint and the lower joint when the well washing valve is closed, when the well-flushing valve is in a closed state, the upper bypass hole and the lower bypass hole are blocked and sealed by the sliding sleeve, and when the well-flushing valve is in an open state, the sliding sleeve moves downwards and falls on the hole shoulder of the lower joint, the top of the sliding sleeve slides to the lower part of the upper bypass hole, so that the upper bypass hole is communicated with the inner cavity of the well washing valve, the inner through hole is communicated with the lower bypass hole in an overlapping manner, and the lower bypass hole is communicated with the inner cavity of the well washing valve. The packer has the advantages of simple and reasonable structure, capability of effectively realizing a bidirectional function, capability of meeting the function of circulating well washing after the test is finished, and capability of balancing the pressure difference between the upper part and the lower part of the packer during the unpacking.
In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, or the technical fields or the application occasions are different, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.
Disclosure of Invention
The invention aims to provide a hydraulic control rubber barrel type bidirectional well washing valve and a method thereof aiming at the defects in the prior art, which can effectively avoid the leakage of the well washing valve caused by corrosion and scaling, realize positive and negative bidirectional well washing, ensure the long-term efficient sealing of the bottom of a water injection pipe column and the smooth well washing, and prolong the service life of a water injection well.
In order to achieve the purpose, the 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 first-stage hydraulic control mechanism, the second-stage hydraulic control mechanism and the sealing rubber cylinder are all sleeved outside the central pipe;
the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to the axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed.
Further, the second-stage hydraulic control mechanism comprises a second-stage cylinder body and a sealing connecting sleeve;
the secondary cylinder body is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central pipe;
the inner wall of the secondary cylinder body 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 cylinder body and the inner wall of the sealing connecting sleeve, the lower end of the secondary cylinder body 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.
Furthermore, 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 annulus, the secondary cylinder body is provided with a cylinder body radial hole, the second inner annulus is communicated with the second outer annulus through the cylinder body radial hole, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the second outer annulus is communicated with the outside through the connecting sleeve radial hole; the position of the radial hole of the connecting sleeve is lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the cylinder body radial hole, the second outer annular space and the connecting sleeve radial hole form the well-flushing channel which is communicated in the radial direction.
Further, the lower end of the central tube is connected with a lower joint in a threaded manner, 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 abutted against the upper end face of the lower connector.
Furthermore, a sealing ring is arranged between the outer wall of the upper end part of the secondary cylinder body 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 cylinder body and the outer wall of the central pipe; an inner contracting ring table is arranged on the inner wall of the sealing connecting sleeve, and the lower end face of the inner contracting ring table can axially limit the upper end face of the secondary cylinder body.
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 cylinder body 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 cylinder body and the outer wall of the central pipe form a first annular gap, and the lower end face of the primary cylinder body is pressed on the upper end face of the secondary cylinder body;
the return spring is sleeved outside the first-stage cylinder body, the lower end of the return spring abuts against the upper end face of the sealing connection sleeve, and the upper end of the return spring abuts against the lower end face of the outer ring expanding table arranged on the outer wall of the first-stage cylinder body.
Furthermore, 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 face of the primary cylinder body, and meanwhile, a pressure transmission gap is formed between the upper end face of the primary cylinder body and the upper joint and is communicated with the hydraulic channel of the upper joint.
Further, a sealing ring is arranged on the outer wall of the upper end part of the primary cylinder body 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 cylinder body 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 purpose, the invention adopts the following technical scheme:
a use method of a hydraulic control rubber cylinder type bidirectional well flushing valve comprises the following steps:
and (3) closing the well washing valve: connecting the hydraulic control rubber barrel type well washing valve in a pipe column and putting the pipe column into a well; the hydraulic oil is pressurized through the hydraulic control pipeline, the hydraulic oil flows into the hydraulic channel through the upper joint, the hydraulic oil pushes the sealing ring on the upper end face of the primary hydraulic cylinder to prevent the hydraulic oil from flowing into the oil pipe, and the sealing ring can prevent the hydraulic oil from flowing into the space of the return spring and ensure that the pressure of the hydraulic oil pushes 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; hydraulic oil flows downwards through an inner ring space of the primary hydraulic cylinder to push the upper end face 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 on the inner side of the sealing connecting sleeve is sealed, and at the moment, the well washing valve is closed and water can be injected normally;
the well flushing valve opening process: the hydraulic oil is decompressed, the primary hydraulic cylinder moves upwards to reset under the pushing of a 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 a well washing channel is opened;
and (3) well flushing: the central pipe is provided with holes at the position of an annular space corresponding to the second-stage hydraulic cylinder, the second-stage hydraulic cylinder is provided with holes at the positions corresponding to the inner side and the outer side annular space, the annular space corresponding to the lower joint is provided with holes in a sealing connection sleeve, and the three holes and the two annular spaces form a channel for communicating the inside and the outside of the oil pipe together, so that positive and negative well flushing can be realized.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the technical scheme that a central pipe, a secondary piston and a sealing connecting sleeve are radially punched, a communication channel inside and outside an oil pipe is preset, an independent hydraulic control pipeline pressurizing channel is arranged, the compression and recovery states of a sealing rubber cylinder are controlled, the opening and closing control of the channel inside and outside the oil pipe is realized, and finally the opening and closing of a well washing channel of the well washing 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 return spring, the secondary piston is further pushed to move downwards to seal the rubber cylinder, the rubber cylinder is compressed and expanded, a well washing channel is closed, and normal water injection is carried out in the state; when a well is required to be washed, the pressure in the hydraulic pipeline is relieved, the return spring returns the primary hydraulic cylinder upwards to the original position, the rubber cylinder contracts and returns under the self elastic action, and the well washing channel is opened. The invention provides a brand new design idea, changes common metal sealing into rubber sealing, is not influenced by corrosion, scaling, impurities and incomplete well flushing, and has more reliable sealing; dynamic pressure compensation can be carried out according to water injection pressure change and working condition conversion, and the requirement of efficient bottom plugging of long-life water drive development is met; after the ground hydraulic control system of the well washing valve releases pressure, the intervention of the reset spring accelerates the retraction of the rubber cylinder, and the forward and reverse washing functions of large discharge and thorough smoothness 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 joint hoop 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 pipe 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 all sleeved outside the central pipe 7;
the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to the axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary cylinder body 12 and a sealing connecting sleeve 11;
the secondary cylinder body is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central pipe;
the inner wall of the secondary cylinder body 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 cylinder body and the inner wall of the sealing connecting sleeve, the lower end of the secondary cylinder body 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.
Furthermore, 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 annulus, the secondary cylinder body is provided with a cylinder body radial hole, the second inner annulus is communicated with the second outer annulus through the cylinder body radial hole, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the second outer annulus is communicated with the outside through the connecting sleeve radial hole; the position of the radial hole of the connecting sleeve is lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the cylinder body radial hole, the second outer annular space and the connecting sleeve radial hole form the well-flushing channel which is communicated in the radial direction.
Further, the lower end of the central tube is connected with a lower joint in a threaded manner, 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 abutted against the upper end face of the lower connector.
Furthermore, a sealing ring is arranged between the outer wall of the upper end part of the secondary cylinder body 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 cylinder body and the outer wall of the central pipe; an inner contracting ring table is arranged on the inner wall of the sealing connecting sleeve, and the lower end face of the inner contracting ring table can axially limit the upper end face of the secondary cylinder body.
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 cylinder body 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 cylinder body and the outer wall of the central pipe form a first annular gap, and the lower end face of the primary cylinder body is pressed on the upper end face of the secondary cylinder body;
the return spring is sleeved outside the first-stage cylinder body, the lower end of the return spring abuts against the upper end face of the sealing connection sleeve, and the upper end of the return spring abuts against the lower end face of the outer ring expanding table arranged on the outer wall of the first-stage cylinder body.
Furthermore, 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 face of the primary cylinder body, and meanwhile, a pressure transmission gap is formed between the upper end face of the primary cylinder body and the upper joint and is communicated with the hydraulic channel of the upper joint.
Further, a sealing ring is arranged on the outer wall of the upper end part of the primary cylinder body 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 cylinder body 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 in threaded connection with the top of the outer side of the central tube 7, and the upper part of the screw thread is sealed by a sealing ring 3; a hydraulic pipeline connecting hole and a hydraulic channel are axially arranged on the outer side of the upper joint 2; 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 sleeve 13 and the lower joint 15 are axially arranged on the outer side of the central tube 7 from top to bottom, and the primary hydraulic cylinder 5, the secondary hydraulic cylinder 12 and the sealing rubber sleeve are moving parts; the central pipe 7 is provided with 4 radial holes at the part coaxially opposite to the secondary hydraulic cylinder 12;
the radial inner side of the primary hydraulic cylinder 5 is provided with a central pipe 7, and an annular gap is formed between the central pipe 7 and the primary hydraulic cylinder; and a return spring 6 is arranged on the radial outer side of the primary hydraulic cylinder 5. The upper side of the primary hydraulic cylinder 5 in the axial direction is provided with an upper joint 2, a gap is formed between the upper joint 2 and the gap, and the gap is communicated with a hydraulic channel of the upper joint 2; the outer side of a radial outer 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 through two sealing rings 4; the axial lower 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 upper end of the reset spring 6 in the axial direction is a primary hydraulic cylinder 5, the lower end in the axial direction is the upper end of a sealing connecting sleeve 11, the radial outer side of the reset spring is the outer wall of the upper joint 2, and the radial inner side of the reset 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 pipe 7 through two sealing rings 9, an annular space is formed between the radial inner side of the secondary hydraulic cylinder 12 and the central pipe 7, and when the secondary hydraulic cylinder 12 axially displaces, the annular space is always opposite to an opening on the central pipe 7; the outer side of the upper end of the secondary hydraulic cylinder 12 is sealed with the sealing connecting sleeve 11 through two sealing rings 10, and an annular space is formed between the radial outer side of the secondary hydraulic cylinder and the sealing connecting sleeve 11; 4 holes are radially formed in the circumferential direction of the secondary hydraulic cylinder 12; the lower end of the secondary hydraulic cylinder 12 is contacted with the sealing rubber cylinder;
the radial inner side of the sealing rubber cylinder is provided with a central pipe 7, the radial outer side of the sealing rubber cylinder is provided with a sealing connecting sleeve 11, and an annular space is formed between the sealing rubber cylinder and the sealing connecting sleeve 11; the upper end of the sealing rubber cylinder in the axial direction is provided with a secondary hydraulic cylinder 12, and the lower end of the sealing rubber cylinder in the axial direction is provided with a lower joint 15;
the upper end of the sealing connecting sleeve 11 is in contact 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 sealing rings 10 are in sealing contact with the secondary hydraulic cylinder 12, the sealing rubber cylinder is arranged on the inner side of the annular space, and the lower joint 15 is connected with the anti-rotation pin 14; the sealing connecting sleeve 11 is provided with 4 radial holes which are uniformly distributed in the circumferential direction at the position corresponding to the axial direction of the lower connector 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 in contact with the sealing rubber cylinder, the inner side of the upper end of the lower joint is connected with the central pipe 7 through internal threads, and the outer side of the upper end is opposite to a radial opening of the sealing connecting sleeve 11 at an annular space; the outer side of the lower joint 15 is fixed 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 can be connected with other downhole tools or oil pipes.
The specific use method of the invention comprises the following steps: as shown in fig. 1.
And (3) closing the well washing valve: the hydraulic control rubber barrel type well washing valve is connected into a pipe column and is put into a well. The hydraulic oil is pressurized through the hydraulic control pipeline, the hydraulic oil flows into the hydraulic channel through the upper joint 2, the hydraulic oil pushes the sealing ring 3 on the upper end face of the primary hydraulic cylinder 5 to prevent the hydraulic oil from flowing into the oil pipe, the sealing ring 4 can prevent the hydraulic oil from flowing into the space of the return spring, and the pressure of the hydraulic oil is guaranteed to push the upper end face of the primary hydraulic cylinder 5; the first-stage hydraulic cylinder 5 compresses the return spring 6 and moves axially downwards to push the second-stage hydraulic cylinder 12; the hydraulic oil flows downwards through the inner ring space 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 on the inner side of the sealing connecting sleeve 11 is sealed, and at the moment, the well washing valve is closed and water can be normally injected.
Opening the well flushing valve: 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 resilience force of the sealing rubber cylinder 13, the sealing rubber cylinder 13 retracts to reset, and the well washing channel is opened.
And (3) well flushing: the central tube 7 is provided with holes at the position of an annular space corresponding to the second-stage hydraulic cylinder 12, the second-stage hydraulic cylinder 12 is provided with holes at the position corresponding to the inner side and the outer side annular space, the sealing connecting sleeve 11 is provided with holes at the position of the annular space corresponding to the lower connector, and the three holes and the two annular spaces form a communicating channel inside and outside the oil tube together, so that positive and negative well flushing can be realized.
The central pipe 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, uses the hydraulic pressure to push the piston to seal the rubber cylinder, and closes the well washing channel; after pressure relief, a spring mechanism is used for pushing the piston to return, the rubber cylinder retracts, and a well washing channel is opened; the hydraulic control rubber barrel type well washing valve provided by the invention can be used together with a hydraulic control packer, one hydraulic control pipeline simultaneously controls the hydraulic control packer and the well washing valve, the setting of the packer and the sealing of the well washing valve are realized simultaneously, after the pressure of the hydraulic control pipeline is relieved, the packer is unlocked, the well washing valve is opened, and the forward and reverse bidirectional well washing can be realized.
In a word, the invention provides the hydraulic control rubber cylinder type well washing valve utilizing the original tubular column hydraulic control system, which can effectively avoid the leakage of the well washing valve caused by corrosion and scaling, can realize positive and negative bidirectional well washing, ensures the long-term efficient sealing of the bottom of the water injection tubular column and the smooth well washing, 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 all sleeved outside the central pipe 7;
the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to the axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary cylinder body 12 and a sealing connecting sleeve 11;
the secondary cylinder body is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central pipe;
the inner wall of the secondary cylinder body 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 cylinder body and the inner wall of the sealing connecting sleeve, the lower end of the secondary cylinder body 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.
Furthermore, 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 annulus, the secondary cylinder body is provided with a cylinder body radial hole, the second inner annulus is communicated with the second outer annulus through the cylinder body radial hole, the sealing connecting sleeve is provided with a connecting sleeve radial hole, and the second outer annulus is communicated with the outside through the connecting sleeve radial hole; the position of the radial hole of the connecting sleeve is lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the second-stage cylinder body radial hole, the second outer annular space and the connecting sleeve radial hole form the well-flushing channel which is communicated in the radial direction.
Furthermore, the lower end of the central pipe is connected with a lower joint in a threaded manner, 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 abutted against the upper end face of the lower connector.
Furthermore, a sealing ring is arranged between the outer wall of the upper end part of the secondary cylinder body 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 cylinder body and the outer wall of the central pipe; an inner contracting ring table is arranged on the inner wall of the sealing connecting sleeve, and the lower end face of the inner contracting ring table can axially limit the upper end face of the secondary cylinder body.
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 all sleeved outside the central pipe 7;
the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to the axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed.
Further, the secondary hydraulic control mechanism comprises a secondary cylinder body 12 and a sealing connecting sleeve 11;
the secondary cylinder body is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central pipe;
the inner wall of the secondary cylinder body 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 cylinder body and the inner wall of the sealing connecting sleeve, the lower end of the secondary cylinder body 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 fig. 1 is used in all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more specific components are only the best embodiments, and the embodiments with less specific components are the basic embodiments, but the basic objects of the invention can also be achieved, so all the modified embodiments are within the protection scope of the invention.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. 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," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In this specification, the schematic representations of the terms used above 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 a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A 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 first-stage hydraulic control mechanism, the second-stage hydraulic control mechanism and the sealing rubber cylinder are all sleeved outside the central pipe;
the upper end of the second-stage hydraulic control mechanism is connected with the first-stage hydraulic control mechanism and is subjected to the axial pressure of the first-stage hydraulic control mechanism, and the second-stage hydraulic control mechanism and the central pipe are simultaneously provided with a well washing channel which is radially communicated;
the upper end of the rubber cylinder is pressed at the lower end of the secondary hydraulic control mechanism, and the rubber cylinder deforms and blocks the well washing channel after being pressed.
2. The hydraulic control rubber barrel type bidirectional well flushing valve as recited in claim 1, wherein the secondary hydraulic control mechanism comprises a secondary cylinder body and a sealing connecting sleeve;
the secondary cylinder body is arranged in a cavity between the inner wall of the sealing connecting sleeve and the outer wall of the central pipe;
the inner wall of the secondary cylinder body 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 cylinder body and the inner wall of the sealing connecting sleeve, the lower end of the secondary cylinder body 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.
3. The hydraulic control rubber barrel type two-way well-flushing valve as claimed in claim 2, wherein said center tube is provided with a center tube radial hole which enables the inner cavity of the center tube to communicate with the second inner annular space, said secondary cylinder is provided with a cylinder radial hole which enables the second inner annular space to communicate with the second outer annular space, said seal connection sleeve is provided with a connection sleeve radial hole which enables the second outer annular space to communicate with the outside of the seal connection sleeve; the position of the radial hole of the connecting sleeve is lower than the lower end surface of the sealing rubber cylinder; the central pipe radial hole, the first inner annular space, the cylinder body radial hole, the second outer annular space and the connecting sleeve radial hole form the well-flushing channel which is communicated in the radial direction.
4. The hydraulic control rubber barrel type bidirectional well flushing valve as claimed in claim 3, wherein the lower end of the central tube is in threaded connection with the lower joint, the lower end of the sealing connecting sleeve is in threaded connection with the lower joint and is provided with an anti-rotation pin; the lower end face of the sealing rubber cylinder is abutted against the upper end face of the lower connector.
5. The hydraulic control rubber-cylinder type bidirectional well-flushing valve as claimed in claim 2, 3 or 4, wherein a sealing ring is arranged between the outer wall of the upper end part of the secondary cylinder body 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 cylinder body and the outer wall of the central pipe; an inner contracting ring table is arranged on the inner wall of the sealing connecting sleeve, and the lower end face of the inner contracting ring table can axially limit the upper end face of the secondary cylinder body.
6. The hydraulic control rubber barrel type bidirectional well washing valve as claimed in claim 2, 3 or 4, wherein 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 cylinder body 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 cylinder body and the outer wall of the central pipe form a first annular gap, and the lower end face of the primary cylinder body is pressed on the upper end face of the secondary cylinder body;
the return spring is sleeved outside the first-stage cylinder body, the lower end of the return spring abuts against the upper end face of the sealing connection sleeve, and the upper end of the return spring abuts against the lower end face of the outer ring expanding table arranged on the outer wall of the first-stage cylinder body.
7. The hydraulic control rubber barrel type bidirectional well flushing valve as claimed in claim 6, wherein the upper joint is provided with an axial eccentric hydraulic passage, the upper end of the hydraulic passage is communicated with the outside of the upper joint, the lower end of the hydraulic passage is communicated with the upper end surface of the primary cylinder body, and a pressure transmission gap is formed between the axial upper end surface of the primary cylinder body and the upper joint and is communicated with the hydraulic passage of the upper joint.
8. The hydraulic control rubber barrel type bidirectional well flushing valve as recited in claim 7, wherein a seal ring is arranged between the outer wall of the upper end part of the primary cylinder body and the inner wall of the upper joint, and a seal ring is arranged between the outer wall of the lower end part of the primary cylinder body and the inner wall of the upper end part of the sealing connection sleeve.
9. The hydraulic control rubber-barrel type bidirectional well-flushing valve as claimed in claim 2 or 7, wherein the upper end of the upper joint is connected with a coupling.
10. The use method of the hydraulic control rubber cylinder type bidirectional well flushing valve is characterized by comprising the following steps of:
and (3) closing a well washing valve: connecting the hydraulic control rubber barrel type well washing valve in a pipe column and putting the pipe column into a well; the hydraulic oil is pressurized through the hydraulic control pipeline, the hydraulic oil flows into the hydraulic channel through the upper joint, the hydraulic oil pushes the sealing ring on the upper end face of the primary hydraulic cylinder to prevent the hydraulic oil from flowing into the oil pipe, and the sealing ring can prevent the hydraulic oil from flowing into the space of the return spring and ensure that the pressure of the hydraulic oil pushes 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; hydraulic oil flows downwards through an inner ring space of the primary hydraulic cylinder to push the upper end face 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 on the inner side of the sealing connecting sleeve is sealed, and at the moment, the well washing valve is closed and water can be injected normally;
the well flushing valve opening process: the hydraulic oil is decompressed, the primary hydraulic cylinder moves upwards to reset under the pushing of a 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 a well washing channel is opened;
and (3) well flushing: the central pipe is provided with holes at the position of an annular space corresponding to the second-stage hydraulic cylinder, the second-stage hydraulic cylinder is provided with holes at the positions corresponding to the inner side and the outer side annular space, the annular space corresponding to the lower joint is provided with holes in a sealing connection sleeve, and the three holes and the two annular spaces form a channel for communicating the inside and the outside of the oil pipe together, so that positive and negative well flushing can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011121841.XA CN114439417B (en) | 2020-10-19 | 2020-10-19 | Hydraulic control rubber cylinder type bidirectional well flushing valve and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011121841.XA CN114439417B (en) | 2020-10-19 | 2020-10-19 | Hydraulic control rubber cylinder type bidirectional well flushing valve and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114439417A true CN114439417A (en) | 2022-05-06 |
| CN114439417B CN114439417B (en) | 2024-04-16 |
Family
ID=81357681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011121841.XA Active CN114439417B (en) | 2020-10-19 | 2020-10-19 | Hydraulic control rubber cylinder type bidirectional well flushing valve and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439417B (en) |
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 |
|---|
| 贾中等: "闭式采油高效热洗装置设计应用", 《内蒙古石油化工》, no. 15, 31 December 2012 (2012-12-31), pages 26 - 27 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114439417B (en) | 2024-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102409998B (en) | Downhole safety valve | |
| CN107701147B (en) | Annulus pressure underground control valve | |
| CN110107251B (en) | Fracturing filling conversion tool | |
| CN107100606B (en) | Full latus rectum multistage staged fracturing sliding sleeve | |
| CN108343405B (en) | Underground throttle with secondary throttle function | |
| CN101975042B (en) | Fully functional anti-spouting oil drain device | |
| CN114439417A (en) | Hydraulic control rubber cylinder type bidirectional well flushing valve and method | |
| CN207406313U (en) | A kind of annular pressure downhole control valve | |
| CN201851082U (en) | Fully-functional anti-spray oil drain device | |
| CN218376413U (en) | Radial valve system of packer valve joint | |
| CN115992660A (en) | Repeatedly opened and closed reverse circulation valve | |
| CN111734350B (en) | Separating valve capable of being opened and closed repeatedly | |
| CN109538194B (en) | Coiled tubing underground quick leakage finding process pipe column and using method | |
| CN114439445A (en) | Sand prevention sliding sleeve | |
| CN217632374U (en) | Special float valve for coiled tubing | |
| CN117888832B (en) | Underground tool connection special coupling with special threads | |
| CN216043629U (en) | Long-life packer | |
| CN214170497U (en) | Underground hydraulic control switch for high-pressure oil-water well | |
| CN219993653U (en) | Reverse circulation valve | |
| CN219864937U (en) | Packer | |
| CN115704282B (en) | Independent deblocking water injection packer | |
| CN219808980U (en) | Hydraulic seat seal well sealing device | |
| CN211974940U (en) | Sliding sleeve communicating vessel of oil field water injection well | |
| CN114704224B (en) | Intelligent well completion underground digital hydraulic communication controller | |
| CN114575783B (en) | Intelligent well completion downhole hydraulic reversing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |