CN115387757A - Circulating valve - Google Patents
Circulating valve Download PDFInfo
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- CN115387757A CN115387757A CN202211052076.XA CN202211052076A CN115387757A CN 115387757 A CN115387757 A CN 115387757A CN 202211052076 A CN202211052076 A CN 202211052076A CN 115387757 A CN115387757 A CN 115387757A
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- central rod
- wall
- upper joint
- joint
- cavity
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- 238000005553 drilling Methods 0.000 claims abstract description 50
- 238000000227 grinding Methods 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 238000010276 construction Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 16
- 238000007789 sealing Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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- 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)
- Lift Valve (AREA)
Abstract
The invention provides a circulating valve. The circulating valve comprises an upper joint, a lower joint and a central rod; the upper joint is provided with a hollow first cavity, the outer wall of the upper joint is provided with a plurality of jet ports communicated with the first cavity, and one end of the upper joint is used for being connected with a pipeline; one end of the central rod is inserted into the first cavity, the central rod is connected with the upper joint in a sliding mode, and the central rod slides relative to the upper joint along the extending direction of the upper joint so as to close or open the jet orifice; one end of the lower joint is inserted into the other end of the central rod, the central rod is fixedly connected with the lower joint, and the other end of the lower joint is used for being connected with a drilling and grinding tool. The circulating valve provided by the invention improves the construction efficiency.
Description
Technical Field
The invention relates to the technical field of downhole tools, in particular to a circulating valve.
Background
The circulating valve is a common downhole tool for oil and gas fields, is widely applied to a plurality of processes such as underbalanced drilling, well flushing and the like, and has the function of communicating the inside of a shaft with an annulus.
In the prior art, most circulating valves are disposable opening and closing circulating valves, and the bypass valve is opened usually in a ball-throwing opening or pin shearing mode, so that the success rate is high, and the circulating displacement is large.
Because the circulating valve is opened once, the circulating valve must be lifted to the ground for replacement after the circulating operation is finished, and the construction efficiency is reduced.
Disclosure of Invention
The invention provides a circulating valve, which improves the construction efficiency.
The invention provides a circulating valve, which comprises an upper joint, a lower joint and a central rod;
the upper joint is provided with a hollow first cavity, the outer wall of the upper joint is provided with a plurality of jet ports communicated with the first cavity, and one end of the upper joint is used for being connected with a pipeline;
one end of the central rod is inserted into the first cavity, the central rod is connected with the upper joint in a sliding mode, and the central rod slides relative to the upper joint along the extending direction of the upper joint so as to close or open the jet orifice;
one end of the lower joint is inserted into the other end of the central rod, the central rod is fixedly connected with the lower joint, and the other end of the lower joint is used for being connected with a drilling and grinding tool.
In one possible implementation manner, the circulating valve provided by the invention is characterized in that a plurality of injection ports are uniformly arranged around the axis of the upper joint at intervals;
the included angle between the axis of the jet orifice and the axis of the upper joint is 30-60 degrees.
In a possible implementation manner, the circulation valve provided by the invention further comprises a plurality of nozzles, the nozzles are inserted into the ejection openings, and the plurality of nozzles are connected with the plurality of ejection openings in a one-to-one correspondence manner.
In a possible implementation manner, the circulating valve provided by the invention has a first limiting portion on a side wall of the first cavity, the first limiting portion is located on a side of the injection port, which faces away from the lower joint, and the first limiting portion is used for limiting the position of the central rod.
In a possible implementation manner, the circulating valve provided by the invention has a first groove on a side wall of the first cavity, the first groove is used for installing a first sealing ring, an inner wall of the first sealing ring abuts against an outer wall of the central rod, and an outer wall of the first sealing ring abuts against a groove bottom of the first groove.
In a possible implementation manner, the circulating valve provided by the invention further comprises an elastic member, the central rod comprises a large-diameter section and a small-diameter section, one end of the large-diameter section is connected with one end of the small-diameter section, the small-diameter section is inserted into the first cavity, the elastic member is sleeved on the small-diameter section, one end of the elastic member in the elastic direction is abutted with one end, facing the lower joint, of the upper joint, and the other end of the elastic member is abutted with the end face, facing the small-diameter section, of the large-diameter section.
In a possible implementation manner, the circulating valve provided by the invention further comprises an outer cylinder, wherein the outer cylinder is sleeved on one side of the upper joint facing the lower joint, and the upper joint is fixedly connected with the outer cylinder;
the central rod is positioned in the outer barrel, the inner wall of the outer barrel is provided with a second limiting part, and the second limiting part is used for limiting the position of the central rod.
In a possible implementation manner, the large-diameter section of the circulating valve provided by the invention is provided with an internal thread, the lower joint is provided with an external thread matched with the internal thread, and the lower joint is connected with the central rod through the internal thread and the external thread;
the sum of the length of the central rod in the extending direction and the length of the internal thread in the extending direction of the central rod is larger than the distance between the first limiting part and the second limiting part in the extending direction of the central rod.
In a possible implementation manner, in the circulation valve provided by the invention, the outer wall of the lower joint is polygonal, and the inner wall of the second limiting part is matched with the outer wall of the lower joint.
In a possible implementation manner, the circulating valve provided by the invention has a second groove on the outer wall of the large-diameter section, the second groove is used for installing a second sealing ring, the outer wall of the second sealing ring abuts against the inner wall of the outer cylinder, and the inner wall of the second sealing ring abuts against the groove bottom of the second groove.
The circulating valve provided by the invention is provided with the upper joint, the lower joint and the central rod. The upper joint is provided with a hollow first cavity, a plurality of jet ports communicated with the first cavity are formed in the outer wall of the upper joint, and one end of the upper joint is used for being connected with a pipeline. One end of the central rod is inserted into the first cavity, the central rod is connected with the upper joint in a sliding mode, and the central rod slides relative to the upper joint along the extending direction of the upper joint so as to close or open the jet orifice. One end of the lower joint is inserted into the other end of the central rod, the central rod is fixedly connected with the lower joint, and the other end of the lower joint is used for being connected with a drilling and grinding tool. Therefore, when the circulating valve is in a closed state during the drilling and grinding of the drilling and grinding tool or the drilling process, the high-pressure fluid from the pipeline can provide additional pressure for the drilling and grinding tool, and the drilling and grinding efficiency is improved. When no bit pressure exists (namely the drilling and grinding tool is in a non-drilling and grinding state or a drilling state), the circulating valve is in an opening state, so that the circulating chip removal efficiency can be improved. Moreover, the circulating valve can be opened or closed infinitely by the drilling and grinding tool when the drilling and grinding tool applies drilling pressure, the circulating valve does not need to be lifted to the ground for replacement, and the construction efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a circulation valve provided in an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an open state of a circulation valve provided in an embodiment of the present invention;
FIG. 3 is a schematic illustration of a closed state of a circulation valve provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of an upper joint of a circulation valve according to an embodiment of the present invention;
FIG. 5 is a schematic view showing an internal structure of an upper joint of the circulation valve according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a center rod of a circulation valve according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an internal configuration of a center rod in a recirculation valve according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of an outer cylinder in the circulation valve according to an embodiment of the present invention;
FIG. 9 is a schematic view of the structure of a lower joint in the circulation valve according to an embodiment of the present invention;
fig. 10 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A in fig. 2.
Description of reference numerals:
100-upper joint;
110 — a first cavity;
111-a first stop;
112-a first trench;
120-jet ports;
130-a third trench;
200-lower joint;
210-a third cavity;
220-a fourth trench;
300-a center pole;
310-a second cavity;
320-large diameter section;
321-a second trench;
330-small diameter section;
400-a nozzle;
500-a first seal ring;
600-a resilient member;
700-outer cylinder;
710-a second limiting portion;
800-a second seal ring;
900-third seal ring;
1000-fourth seal ring.
Detailed Description
In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an indirect connection through an intermediary, a connection between two elements, or an interaction between two elements. 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", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and "third" (if any) in the description and claims of the invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or maintenance tool.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all embodiments of the present invention. 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.
The first aim of the existing operation of the coiled tubing of the ultra-deep well under pressure without moving a tubing string is to solve the difficult problems of blockage removal and production recovery after the blockage of the oil-gas well. The drilling and grinding time in the drilling and grinding operation process only accounts for 1/4-1/3 of the total operation time, and the time required for circulating the chips out of the well is far longer than the pure drilling and grinding time. Therefore, the improvement of the cycle efficiency is of great significance to the submission of drilling and grinding operations.
And for coiled tubing downhole operations, coiled tubing is relatively small in diameter and prone to buckling. The additional frictional resistance between the coiled tubing and the well wall after buckling is in direct proportion to the square of the axial force, so that the frictional force between the coiled tubing and the well wall is rapidly increased to cause locking, the operating depth cannot be reached, or sufficient bit pressure cannot be provided, and the application bottleneck of the long horizontal section of the coiled tubing is formed.
In order to circulate the drill cuttings out of the well, a circulation valve is arranged on the pipeline. In the prior art, the circulating valve is mostly a one-time opening and closing circulating valve, and the bypass valve is opened usually in a ball-throwing opening or pin shearing mode, so that the success rate is high, and the circulating displacement is large. However, since the circulation valve is opened at one time, the circulation valve must be lifted to the ground after the circulation operation is completed, and thus the construction efficiency is reduced.
In order to solve the technical problems, the circulating valve provided by the invention can utilize an infinite bit pressure switch to efficiently clean debris. Meanwhile, a certain traction effect is generated by hydraulic jet, and the underground tool assembly is pushed to move towards the bottom of the well to achieve the traction effect. And the buffer and additional thrust can be provided for the drill bit, the stress state of the drilling tool is improved, the service life of the drilling tools such as the drill bit and the grinding shoe is prolonged, and the comprehensive drilling and grinding efficiency is improved.
Fig. 1 is a schematic structural view of a circulation valve provided in an embodiment of the present invention, fig. 2 is a schematic structural view of an opening state of the circulation valve provided in an embodiment of the present invention, and fig. 3 is a schematic structural view of a closing state of the circulation valve provided in an embodiment of the present invention.
Referring to fig. 1 to 3, the present invention provides a circulation valve including an upper joint 100, a lower joint 200, and a center rod 300.
The upper joint 100 has a hollow first cavity 110, and the outer wall of the upper joint 100 has a plurality of injection ports 120 communicating with the first cavity 110, and one end of the upper joint 100 is used for connecting with a pipeline. One end of the central rod 300 is inserted into the first cavity 110, the central rod 300 is slidably coupled to the upper joint 100, and the central rod 300 slides relative to the upper joint 100 in the extending direction of the upper joint 100 to close or open the injection port 120. One end of the lower joint 200 is inserted into the other end of the central rod 300, the central rod 300 is fixedly connected with the lower joint 200, and the other end of the lower joint 200 is used for being connected with a drilling and grinding tool.
Illustratively, the drill milling tool may be a mill shoe or a drill bit.
In use, when the drilling and grinding tool drills forward or drills, the lower joint 200 connected with the drilling and grinding tool is influenced by the bit pressure to push the central rod 300 to slide towards the upper joint 100 along the extending direction, and when the central rod 300 slides to the position of the jet opening 120 to close the jet opening 120, the circulating valve is in a closed state. High pressure fluid in the conduit acts through the first cavity 110 on the end of the central rod 300 facing away from the lower joint 200. In this way, the high pressure fluid can provide additional pressure for the drilling and grinding tool, and the drilling and grinding efficiency is improved.
When no bit pressure exists (namely when the drilling and grinding tool is in a non-drilling and grinding or drilling state), high-pressure fluid flows in through the first cavity 110 to push the central rod 300 and the lower joint 200 to move away from the upper joint 100, so that the jet opening 120 is opened, the circulating valve is in an opening state at the moment, and the high-pressure fluid forms jet flow through the jet opening 120, so that fragments at the bottom of a well are cleaned, and the circulating chip removal efficiency is improved.
Specifically, an external thread is provided on a side of the upper joint 100 away from the lower joint 200, and the external thread is used for connecting with a pipeline. Illustratively, the external threads may be trapezoidal threads.
One side of the lower joint 200 facing away from the upper joint 100 is provided with an external thread for connection with a drilling and grinding tool. Illustratively, the external threads may be trapezoidal threads.
The central rod 300 has a hollow second cavity 310, the lower joint 200 has a hollow third cavity 210, and the first cavity 110, the second cavity 310 and the third cavity 210 are sequentially communicated. Thus, the high-pressure fluid flows the first cavity 110, the second cavity 310 and the third cavity 210 to the drilling and grinding tool position in sequence, and the temperature of the drilling and grinding tool is reduced.
It is understood that one end of the central rod 300 is inserted into the first cavity 110, and the first cavity 110 can limit the position of the central rod 300, so as to prevent the central rod 300 from moving in the radial direction.
The circulating valve provided by the embodiment of the invention is formed by arranging an upper joint 100, a lower joint 200 and a central rod 300. The upper joint 100 has a hollow first cavity 110, a plurality of injection ports 120 communicating with the first cavity 110 are provided on an outer wall of the upper joint 100, and one end of the upper joint 100 is used for connecting with a pipeline. One end of the central rod 300 is inserted into the first cavity 110, the central rod 300 is slidably coupled to the upper joint 100, and the central rod 300 slides relative to the upper joint 100 in the extending direction of the upper joint 100 to close or open the injection port 120. The center rod 300 has a hollow second cavity 310, the lower joint 200 has a hollow third cavity 210, and the first cavity 110, the second cavity 310 and the third cavity 210 are sequentially communicated. One end of the lower joint 200 is inserted into the second cavity 310, the central rod 300 is fixedly connected with the lower joint 200, and the other end of the lower joint 200 is used for being connected with a drilling and grinding tool. Therefore, when the circulating valve is in a closed state during forward drilling or drilling of the drilling and grinding tool, the high-pressure fluid from the pipeline can provide additional pressure for the drilling and grinding tool, and the drilling and grinding efficiency is improved. When no bit pressure exists (namely the drilling and grinding tool is in a non-drilling and grinding state or a drilling state), the circulating valve is in an opening state, so that the circulating chip removal efficiency can be improved. Moreover, the circulating valve can be opened or closed for an unlimited time by judging whether the drilling and grinding tool applies the drilling pressure or not, the circulating valve does not need to be lifted to the ground for replacement, and the construction efficiency is improved.
Fig. 4 is a schematic structural view of an upper joint in a circulation valve according to an embodiment of the present invention, and fig. 5 is a schematic structural view of an interior of the upper joint in the circulation valve according to the embodiment of the present invention.
Referring to fig. 2, 4 and 5, in one possible implementation, the plurality of injection ports 120 are uniformly spaced around the axis of the upper joint 100. The axis of the jet port 120 is at an angle of 30-60 deg. to the axis of the upper joint 100.
For example, the number of the injection ports 120 may be 6.
Wherein, the included angle b between the axis of the injection port 120 and the axis of the upper joint 100 is 45 ° or 50 °.
It will be appreciated that the axis of the injection port 120 is at an angle b of 30-60 deg. to the axis of the upper connector 100, so that the high pressure fluid is injected backward through the injection port 120, facilitating the forward movement of the drilling and grinding tool connected to the lower connector 200. The locking of the pipeline can be effectively relieved, and the underground tool combination is pushed to prolong the depth detection.
As shown by the straight arrow in fig. 2 and 3, the direction is the front, and the side opposite to the straight arrow is the rear.
In the present embodiment, the circulation valve further includes a plurality of nozzles 400, the nozzles 400 are inserted into the injection ports 120, and the plurality of nozzles 400 are connected to the plurality of injection ports 120 in a one-to-one correspondence.
Specifically, the side wall of the injection port 120 is provided with an internal thread. For example, npt threads, (National (American) Pipe Thread, american standard 60 degree cone). The nozzle 400 is provided with an internal thread matching the internal thread, and the nozzle 400 and the upper joint 100 are connected by the internal thread and the external thread. Thus, the nozzle 400 is detachably coupled to the upper connector 100, thereby facilitating replacement of the nozzle 400. In a particular application, the nozzle 400 may be replaced as needed to allow efficient injection of high pressure fluid.
It can be understood that the pressure after the high-pressure fluid is sprayed can be changed by providing the nozzle 400, thereby improving the circulating chip removal efficiency.
Referring to fig. 4, in a possible implementation manner, a first position-limiting portion 111 is provided on a side wall of the first cavity 110, the first position-limiting portion 111 is located on a side of the injection port 120 facing away from the lower joint 200, and the first position-limiting portion 111 is used for limiting a position of the central rod 300. In this way, an extreme position in which the center rod 300 slides in the extending direction toward the upper joint 100 can be set.
In some embodiments, the first cavity 110 has a first groove 112 on a side wall thereof, the first groove 112 is used for mounting the first sealing ring 500, an inner wall of the first sealing ring 500 abuts against an outer wall of the central rod 300, and an outer wall of the first sealing ring 500 abuts against a groove bottom of the first groove 112. Thus, the high-pressure fluid is prevented from leaking out through the gap between the center rod 300 and the upper joint 100, and the sealing performance of the circulation valve is improved.
Fig. 6 is a schematic structural view of a center rod of a circulation valve according to an embodiment of the present invention, and fig. 7 is a schematic structural view of an interior of the center rod of the circulation valve according to an embodiment of the present invention.
Referring to fig. 6 and 7, in a possible implementation manner, the circulation valve further includes an elastic member 600, the center rod 300 includes a large diameter section 320 and a small diameter section 330, one end of the large diameter section 320 is connected to one end of the small diameter section 330, the small diameter section 330 is inserted into the first cavity 110, the elastic member 600 is sleeved on the small diameter section 330, one end of the elastic member 600 in an elastic force direction abuts against one end of the upper joint 100 facing the lower joint 200, and the other end abuts against an end surface of the large diameter section 320 facing the small diameter section 330.
Referring to fig. 2 and 3, when the drilling and grinding tool drills forward or drills, the lower connector 200 connected to the drilling and grinding tool is pressed by the drill pressure to push the center rod 300 to slide toward the upper connector 100 in the extending direction, the center rod 300 compresses the elastic member 600, and the length of the elastic member 600 is reduced. As the central rod 300 slides, the flow dividing area of the injection port 120 decreases, the pressure of the high-pressure fluid acting on the end surface of the central rod 300 facing away from the lower joint 200 increases, and the spring force increases. In this way, the high pressure fluid and the resilient member 600 may provide additional pressure to the drill mill tool, increasing the efficiency of the drill mill. Wherein the greater the compression of the resilient member 600, the greater the pressure applied to the abrasive drilling tool. Moreover, the elastic member 600 may have a shock absorbing and buffering effect.
Specifically, the elastic member 600 may be a spring.
Fig. 8 is a schematic structural diagram of an outer cylinder in a circulation valve according to an embodiment of the present invention.
Referring to fig. 8, in a possible implementation manner, the circulation valve further includes an outer cylinder 700, the outer cylinder 700 is sleeved on one side of the upper joint 100 facing the lower joint 200, and the upper joint 100 is fixedly connected with the outer cylinder 700.
The central rod 300 is located in the outer barrel 700, the inner wall of the outer barrel 700 has a second limiting portion 710, and the second limiting portion 710 is used for limiting the position of the central rod 300.
In this way, an extreme position may be set in which the central rod 300 slides away from the upper joint 100 in the extension direction.
In one possible implementation, the large diameter section 320 has an internal thread, the lower joint 200 has an external thread matching the internal thread, and the lower joint 200 is connected with the central rod 300 by the internal thread and the external thread.
It should be noted that, in order to facilitate the connection between the central rod 300 and the lower joint 200, the end of the central rod 300 facing away from the lower joint 200 is disposed in a hexagonal-inside configuration. During installation, the wrench is inserted into the end, away from the lower joint 200, of the central rod 300, the wrench is rotated to drive the central rod 300 to rotate relative to the lower joint 200, and therefore the central rod 300 and the lower joint 200 are connected into a whole.
The sum of the length of the central rod 300 in the extending direction and the length of the internal thread in the extending direction of the central rod 300 is greater than the distance between the first limiting portion 111 and the second limiting portion 710 in the extending direction of the central rod 300. That is, the distance that the center rod 300 is movable in the extension direction with respect to the upper joint 100 is smaller than the length of the mating threads of the center rod 300 and the lower joint 200, so that the center rod 300 and the lower joint 200 are prevented from being completely separated and the lower joint 200 is prevented from falling down to the bottom of the well.
Fig. 9 isbase:Sub>A schematic structural view ofbase:Sub>A lower joint inbase:Sub>A circulation valve according to an embodiment of the present invention, and fig. 10 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A direction in fig. 2.
Referring to fig. 9 and 10, in some embodiments, the outer wall of the lower joint 200 has a polygonal shape, and the inner wall of the second stopper 710 matches the outer wall of the lower joint 200.
It will be appreciated that the polygonal outer wall of the lower sub 200 prevents the central rod 300 and the lower sub 200 from freely rotating in the outer barrel 700, thereby transmitting torque to the drilling and grinding tool.
Referring to fig. 6, in a possible implementation manner, the outer wall of the large-diameter section 320 has a second groove 321, the second groove 321 is used for installing a second seal ring 800, the inner wall of the second seal ring 800 abuts against the groove bottom of the second groove 321, and the outer wall of the second seal ring 800 abuts against the inner wall of the outer cylinder 700. Thus, the high-pressure fluid is prevented from leaking out through the gap between the center rod 300 and the outer cylinder 700, and the sealing performance of the circulation valve is improved.
Referring to fig. 4, the outer wall of the upper joint 100 has a third groove 130, the third groove 130 is used for mounting a third seal ring 900, the inner wall of the third seal ring 900 abuts against the bottom of the third groove 130, and the outer wall of the third seal ring 900 abuts against the outer cylinder 700. Thus, the leakage of the high-pressure fluid through the gap between the upper joint 100 and the outer cylinder 700 can be prevented, and the sealing performance of the circulation valve can be improved.
As shown in fig. 9, the lower joint 200 has a fourth groove 220 at one end facing the center rod 300, the fourth groove 220 is used for mounting a fourth seal ring 1000, one end of the fourth seal ring 1000 abuts against the bottom of the fourth groove 220, and the other end of the fourth seal ring 1000 abuts against the center rod 300. Thus, the high-pressure fluid can be prevented from leaking out through the gap between the central rod 300 and the lower joint 200, and the sealing performance of the circulation valve can be improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A circulating valve is characterized by comprising an upper joint, a lower joint and a central rod;
the upper joint is provided with a hollow first cavity, the outer wall of the upper joint is provided with a plurality of jet ports communicated with the first cavity, and one end of the upper joint is used for being connected with a pipeline;
one end of the central rod is inserted into the first cavity, the central rod is connected with the upper joint in a sliding mode, and the central rod slides relative to the upper joint along the extending direction of the upper joint so as to close or open the jet orifice;
one end of the lower joint is inserted into the other end of the central rod, the central rod is fixedly connected with the lower joint, and the other end of the lower joint is used for being connected with a drilling and grinding tool.
2. The circulation valve of claim 1, wherein the plurality of injection ports are evenly spaced about the axis of the upper joint;
the included angle between the axis of the jet orifice and the axis of the upper joint is 30-60 degrees.
3. The circulation valve of claim 1, further comprising a plurality of nozzles inserted in the injection ports, the plurality of nozzles being connected in a one-to-one correspondence with the plurality of injection ports.
4. The circulation valve of any one of claims 1 to 3, wherein the first cavity has a first position-limiting portion on a side wall thereof, the first position-limiting portion being located on a side of the jet port facing away from the lower joint, the first position-limiting portion being configured to limit a position of the central rod.
5. The circulation valve of any one of claims 1 to 3, wherein the first cavity has a first groove in a side wall thereof for receiving a first seal ring, an inner wall of the first seal ring abutting an outer wall of the center rod, and an outer wall of the first seal ring abutting a bottom of the first groove.
6. The circulation valve of claim 4, further comprising an elastic member, wherein the center rod comprises a large diameter section and a small diameter section, one end of the large diameter section is connected to one end of the small diameter section, the small diameter section is inserted into the first cavity, the elastic member is sleeved on the small diameter section, one end of the elastic member in an elastic direction abuts against one end of the upper joint facing the lower joint, and the other end of the elastic member abuts against an end face of the large diameter section facing the small diameter section.
7. The circulation valve of claim 6, further comprising an outer cylinder, wherein the outer cylinder is sleeved on a side of the upper joint facing the lower joint, and the upper joint is fixedly connected with the outer cylinder;
the central rod is positioned in the outer barrel, the inner wall of the outer barrel is provided with a second limiting part, and the second limiting part is used for limiting the position of the central rod.
8. The circulation valve of claim 7, wherein the major diameter section has an internal thread, wherein the lower sub has an external thread that mates with the internal thread, and wherein the lower sub is coupled to the central rod via the internal thread and the external thread;
the sum of the length of the central rod in the extending direction and the length of the internal thread in the extending direction of the central rod is larger than the distance between the first limiting portion and the second limiting portion in the extending direction of the central rod.
9. The circulation valve of claim 8, wherein an outer wall of the lower joint is polygonal and an inner wall of the second retaining portion matches the outer wall of the lower joint.
10. The circulation valve of claim 8, wherein the outer wall of the large diameter section has a second groove for receiving a second seal ring, the outer wall of the second seal ring abutting the inner wall of the outer barrel, the inner wall of the second seal ring abutting a groove bottom of the second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052076.XA CN115387757A (en) | 2022-08-30 | 2022-08-30 | Circulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052076.XA CN115387757A (en) | 2022-08-30 | 2022-08-30 | Circulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115387757A true CN115387757A (en) | 2022-11-25 |
Family
ID=84124696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211052076.XA Pending CN115387757A (en) | 2022-08-30 | 2022-08-30 | Circulating valve |
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| Country | Link |
|---|---|
| CN (1) | CN115387757A (en) |
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|---|---|---|---|---|
| CN207296932U (en) * | 2017-09-08 | 2018-05-01 | 张静 | One kind repeats to open and close circulating valve |
| US20180306000A1 (en) * | 2015-06-19 | 2018-10-25 | Drlg Tools, Llc | Circulation valve |
| CN109630049A (en) * | 2018-11-09 | 2019-04-16 | 中国海洋石油集团有限公司 | A kind of reverse circulation valve |
| CN113027365A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气集团有限公司 | Drilling and grinding multi-time opening and closing circulating valve |
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2022
- 2022-08-30 CN CN202211052076.XA patent/CN115387757A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180306000A1 (en) * | 2015-06-19 | 2018-10-25 | Drlg Tools, Llc | Circulation valve |
| CN207296932U (en) * | 2017-09-08 | 2018-05-01 | 张静 | One kind repeats to open and close circulating valve |
| CN109630049A (en) * | 2018-11-09 | 2019-04-16 | 中国海洋石油集团有限公司 | A kind of reverse circulation valve |
| CN113027365A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气集团有限公司 | Drilling and grinding multi-time opening and closing circulating valve |
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| Title |
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| 于明武;何俊杰;靳强;王德贵;王前敏;朱浩铭;: "钻井多次循环开关阀技术现状及发展建议", 石油矿场机械, no. 11, 25 November 2016 (2016-11-25) * |
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