CN112922549A - Splash-proof well drilling plug valve - Google Patents
Splash-proof well drilling plug valve Download PDFInfo
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- CN112922549A CN112922549A CN202110338602.8A CN202110338602A CN112922549A CN 112922549 A CN112922549 A CN 112922549A CN 202110338602 A CN202110338602 A CN 202110338602A CN 112922549 A CN112922549 A CN 112922549A
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- valve
- sleeve
- ball core
- hole
- valve sleeve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
Abstract
The invention relates to the technical field of petroleum and geological drilling equipment, in particular to a splash-proof drilling plug valve which comprises a valve body, a valve core assembly and a knob switch, wherein the valve body is hollow, and two layers of steps are arranged on the inner wall of the valve body; the valve core assembly is arranged in the valve body; a through hole is formed in the side wall between the two layers of steps of the valve body, and a knob switch is arranged in the through hole; the valve core assembly comprises a valve seat, a valve sleeve, a top cover and a ball core; the valve seat and the valve sleeve are respectively arranged on the two layers of steps, and the valve sleeve is movably connected with one step; the ball core is arranged between the valve seat and the valve sleeve and is connected with the rotary switch; one end of the valve sleeve, which is far away from the ball core, is connected with the top cover through threads. The plug valve can automatically close a slurry channel when being connected with a single plug, can be automatically opened when drilling normally, does not need to be manually operated to open and close the plug valve, and can be realized only by always keeping the plug valve at the opening position of the ball valve.
Description
Technical Field
The invention relates to the technical field of drilling equipment for petroleum and geology, in particular to a splash-proof drilling plug valve.
Background
In the process of petroleum and natural gas drilling, the plug valve is an indispensable internal blowout prevention tool, so that a drilling channel can be timely closed when blowout occurs, and the plug valve is mutually combined with a wellhead blowout preventer to form a blowout prevention protective wall.
The plug valve is used as one of internal blowout prevention tools, is mainly arranged on a well platform and positioned at the upper position and the lower position of a kelly bar or arranged in a top drive, can be manually operated in time to close a drill string channel when blowout or well kick and the like occur, and forms a safety protection curtain together with the underground internal blowout prevention tool and a wellhead blowout preventer to ensure the safety of drilling. However, in the field operation process, the problem of slurry splashing is solved by adopting a method of opening and closing the lower plug valve when a single is connected, so that the use frequency of the lower plug valve is very high, the abrasion of a valve core sealing surface is increased, the situation of clamping stagnation or poor sealing can often occur after the lower plug valve is opened and closed for many times, even the sealing completely loses the effect, and at the moment, if the lower plug valve is continuously used, the lower plug valve cannot play the roles of blowout prevention and protection, and meanwhile, a great safety hazard is also buried.
In order to solve the problems, the invention provides a splash-proof drilling plug valve.
Disclosure of Invention
The invention aims to provide a splash-proof drilling plug valve which can automatically close a slurry channel when a single plug is connected and can be automatically opened during normal drilling, the operation of opening and closing a plug ball valve is not needed manually, and the plug valve can be realized only by keeping the plug valve at the opening position of the ball valve all the time, so that the plug valve is more convenient and simpler to use.
Blind hole: the holes are not all opened, and one end of the holes is solid.
In order to achieve the purpose, the invention provides the following technical scheme:
the splash-proof drilling plug valve comprises a valve body, a valve core assembly and a knob switch, wherein the valve body is hollow, and two layers of steps are arranged on the inner wall of the valve body; the valve core assembly is arranged in the valve body; a through hole is formed in the side wall between the two layers of steps of the valve body, and a knob switch is arranged in the through hole;
the valve core assembly comprises a valve seat, a valve sleeve, a top cover and a ball core; the valve seat and the valve sleeve are respectively arranged on the two layers of steps, and the valve sleeve is movably connected with one step; the ball core is arranged between the valve seat and the valve sleeve and is connected with the rotary switch; one end of the valve sleeve, which is far away from the ball core, is connected with the top cover through threads.
Furthermore, a circle of small holes are uniformly distributed at one end of the valve seat, which is far away from the ball core, and the number of the small holes is generally 12-14, blind holes are formed on the valve seat by the circle of small holes, and the two small holes are respectively arranged at two symmetrical ends; a first spring is arranged between the blind hole and the valve body.
Furthermore, a frustum is arranged at one end, far away from the ball core, in the valve sleeve, and a valve rod is connected to the frustum; an inner hole is formed in one end, far away from the ball core, of the valve rod, the inner hole and the valve rod are arranged concentrically, and a blind hole is formed in the valve rod; a round hole coaxial with the valve rod is formed in one end, located on the valve sleeve, of the top cover, and a blind hole is formed in the top cover through the round hole; and a second spring is arranged in the two blind holes.
Furthermore, a lug is arranged at the bottom of the knob switch, and the lug is matched with a groove arranged on the ball core; the outer end face of the knob switch is provided with a protrusion, and the protrusion and the through hole are matched with each other through a notch arranged at one end far away from the ball core.
Further, the valve core assembly is installed and fixed on the inner wall of the valve body.
Furthermore, a spherical sealing surface is arranged between the ball core and the valve sleeve and between the ball core and the valve seat.
Further, the valve sleeve is fixed with the step through threads.
Furthermore, the valve sleeve, the valve seat, the knob switch and the valve rod are all provided with annular grooves on the circumference, and the annular grooves are respectively provided with a first sealing element, a second sealing element, a third sealing element and a fourth sealing element for sealing the valve sleeve, the valve seat, the knob switch and the valve rod.
Furthermore, WC alloy layers are sprayed on the frustum surfaces of the valve rod and the valve sleeve which are connected with each other and the spherical sealing surfaces of the valve sleeve, the spherical core and the valve seat.
Compared with the prior art, the invention has the beneficial effects that:
when blowout and kick occur, the splash-proof drilling plug valve can be forced to rotate to close the ball valve by manually turning the switch like a common plug valve, so that a slurry channel is closed, and slurry at the lower part is prevented from being sprayed out of a well channel due to high pressure; simultaneously, under the ball valve is in the open mode, when the pump stop connects single, it can self-closing mud passageway, prevents that mud in the kelly from letting out, splashes to the rig floor, and after the pump is opened once more, it can open mud passageway again automatically, continues to bore for this plug valve is more intelligent, can be better play open a blowout and guard action.
The invention aims to provide a splash-proof drilling plug valve which can automatically close a slurry channel when a single plug is connected and can be automatically opened during normal drilling, the operation of opening and closing a plug ball valve is not required to be manually carried out, and the splash-proof drilling plug valve can be realized only by keeping the plug valve at the opening position of the ball valve all the time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a preferred embodiment of the present invention showing a B-direction turn button switch;
FIG. 3 is a sectional view taken along the line A in the preferred embodiment of the present invention;
fig. 4 is a view of the valve housing and cap assembly of the preferred embodiment of the present invention.
In the figure: 1. a valve body; 2. a valve seat; 3. a ball core; 4. a knob switch; 5. a valve housing; 6. a valve stem; 7. a top cover; 8. a first spring; 9. a second spring; 10. a first seal member; 11. a second seal member; 12. a third seal member; 13. a fourth seal member; a1, a first flow channel; a2, a second flow channel; a3, a third flow channel; c1, bumps; c2, notch.
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.
Referring to the following drawings, the present invention provides the following technical solutions:
as shown in fig. 1-4, the splash-proof drilling plug valve comprises a valve body 1, a valve core assembly, a knob switch 4, a sealing element and the like; the valve core assembly comprises a valve sleeve 5, a valve rod 6, a ball core 3, a valve seat 2, a top cover 7, a first spring 8 and a second spring 9, and the valve core assembly is installed in a step hole of the valve body 1 and fixed on the inner wall of the valve body 1.
The valve core assembly comprises a valve sleeve 5, a valve rod 6, a ball core 3, a valve seat 2, a top cover 7, a first spring 8 and a second spring 9. The ball core 3 is arranged between the valve sleeve 5 and the valve seat 2, and the joint of the valve sleeve 5, the valve seat 2 and the ball core 3 is a spherical surface, so that the ball core 3 is in spherical contact with the valve sleeve 5 and the valve seat 2 in pairs to form a spherical sealing surface; the top cover 7 is arranged at the hole of one end of the valve sleeve 5 far away from the ball core 3, and the top cover 7 is fixed with the valve sleeve 5 by threads.
A first flow channel A1 is formed between the valve body 1 and the circumference of one end of the valve sleeve 5, which is far away from the ball core 3, a second flow channel A2 is formed at the joint of the valve rod 6 and the valve sleeve 5, a third flow channel A3 is formed in the internal cavity of the valve seat 2, the first flow channel A1 leads to the second flow channel A2, and the second flow channel A2 penetrates through the inner hole of the valve sleeve 5 and is further connected with a third flow channel A3 in the inner hole of the valve sleeve 5; the inner hole of the valve sleeve 5 is a layer of step hole, the valve rod 6 is arranged at one end far away from the ball core 3, and the joint of the valve sleeve 5 and the valve rod 6 is a conical table surface which can be mutually attached to the conical table surface of the circumferential surface of the valve rod 6. The second spring 9 is installed to the valve rod 6 hole, and second spring 9 is a compression spring, and one end wherein supports in the blind hole of top cap 7, and the other end is laminated with the blind hole on the valve rod 6, under the elastic force effect of second spring 9, makes valve rod 6 laminate each other with the frustum face of valve barrel 5 all the time, forms a sealed face.
The valve rod 6 is provided with a fourth sealing element 13 on the circumference, so that the spring chamber formed by the valve sleeve 5, the top cover 7 and the valve rod 6 is a closed oil chamber.
The inner hole of the valve body 1 is two layers of step holes, the first layer of step holes are used for installing the valve seat 2, and the second layer of step holes are provided with internal threads for fixing the valve sleeve 5. A through hole is arranged on the side wall between the two steps and is used for installing the knob switch 4.
The valve housing 5 and the valve seat 2 are respectively provided with a first sealing element 10 and a second sealing element 11 at the circumference to form a seal with the valve body 2. One end of the valve seat 2 far away from the ball core 3 is provided with a small hole with an opening facing the ball core 3 for installing a first spring 8. The first spring 8 is a compression spring, and under the action of the compression spring, the valve seat 2 and the ball core 3, and the ball core 3 and the valve sleeve 5 are tightly attached in pairs.
The knob switch 4 is arranged in the through hole of the valve body 1, a third sealing element 12 is arranged on the circumference of the knob switch 4, and a linear convex block is arranged at the bottom of the knob switch 4 and matched with a linear groove arranged on the ball core 3, so that the knob switch can drive the ball core 3 to rotate. In addition, a notch C2 is arranged at the opening of the through hole of the valve body 1, a protrusion C1 is arranged on the outer end face of the knob switch 4, the notch C2 and the protrusion C1 are matched with each other, the rotation amplitude of the knob switch can be limited to 90 degrees, namely the two rotation limiting positions are the on position and the off position respectively.
The peripheral conical table surface of the valve rod 6, the conical table surface of the step of the valve sleeve 5 and the spherical surface of the valve sleeve 5 positioned at one end of the ball core 3, the outer spherical surface of the ball core 3 and the spherical surface of the valve seat 2 contacted with the ball core 3 are coated with WC alloy layers, and then are finely ground and matched to be ground into a finished product, so that the surface hardness and the performance of the finished product are obviously enhanced, and the situations of abrasion, puncture leakage, puncture and the like of the sealing surface can be effectively prevented to provide the anti-scouring, anti-corrosion and anti-abrasion performance of the.
According to the splash-proof drilling plug valve structure, the specific working principle is as follows:
in the drilling process, when blowout or kick occurs suddenly, the knob switch 4 is rotated to drive the ball core 3 to rotate, so that the axis of the through hole of the ball core 3 is perpendicular to the axes of the inner holes of the valve body 1, the valve seat 2 and the valve sleeve 5, the channel is cut off by the ball core 3 at the moment, the channel is closed, and lower well fluid cannot flow upwards, so that the blowout prevention effect is achieved.
During normal drilling, the control core 3 is always in the passage open position. High-pressure slurry flows in from the upper end, passes through the first flow passage A1 and the second flow passage A2 of the valve sleeve 5, enters the conical table surface of the circumference of the lower end of the valve rod 6, acts on the step surface of the valve rod 6, pushes the valve rod 6 to move upwards against the elastic force of the spring 9, the lower end sealing conical surface of the valve rod 6 is far away from the inner hole step sealing conical surface of the valve sleeve 5, so that the passage is opened, and the slurry enters the inner hole third flow passage A3 of the valve sleeve 5 through the opened flow passage and flows into a lower drilling tool.
When a single is connected, the pressure of slurry is reduced to the lowest after the pump is stopped, the valve rod 6 moves downwards under the action of the second spring 9, the sealing cone table surface at the lower end of the valve rod is attached to the sealing cone surface of the inner hole step of the valve sleeve 5, and the slurry channel is blocked, so that the slurry at the upper end (comprising a square drill stem, an upper rotary plug valve, a water faucet and the like) of the automatic splash-proof plug valve is blocked in a pipe column and cannot be leaked out, and the slurry is prevented from splashing and polluting a drill floor. During special operation, the pressure at the upper end is removed after the pump is stopped, and at the moment, the phenomenon that the internal pressure of a lower drilling tool returns to a wellhead can occur, so that mud in a drilling string suddenly gushes upwards. In such a case, the lower pressure can also push the valve rod 6 to move upwards to open the flow passage, so that the upper and lower pressures of the valve body 1 are balanced to a lower level, and the valve rod 6 is closed under the action of the second spring 9, namely, the slurry splashing and pollution caused by the return of the lower pressure are also prevented.
The invention aims to provide a splash-proof drilling plug valve which can automatically close a slurry channel when a single plug is connected and can be automatically opened during normal drilling, the operation of opening and closing a plug ball valve is not required to be manually carried out, and the splash-proof drilling plug valve can be realized only by keeping the plug valve at the opening position of the ball valve all the time.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (9)
1. Splash-proof drilling plug valve, including valve body (1), case assembly and knob switch (4), its characterized in that: the valve body (1) is hollow, and two layers of steps are arranged on the inner wall of the valve body (1); the valve core assembly is arranged in the valve body (1); a through hole is formed in the side wall between two layers of steps of the valve body (1), and a knob switch (4) is arranged in the through hole;
the valve core assembly comprises a valve seat (2), a valve sleeve (5), a top cover (7) and a ball core (3); the valve seat (2) and the valve sleeve (5) are respectively arranged on the two layers of steps, and the valve sleeve (5) is movably connected with one step; the ball core (3) is arranged between the valve seat (2) and the valve sleeve (5), and the ball core (3) is connected with the rotary switch; one end, far away from the ball core (3), of the valve sleeve (5) is connected with the top cover (7) through threads.
2. The splash proof drilling plug valve of claim 1, wherein: a circle of small holes are uniformly distributed at one end of the valve seat (2) far away from the ball core (3), and the two small holes are respectively arranged at two symmetrical ends; a first spring (8) is arranged between the small hole and the valve body (1).
3. The splash proof drilling plug valve of claim 2, wherein: a frustum is arranged at one end, far away from the ball core (3), in the valve sleeve (5), and a valve rod (6) is connected onto the frustum; an inner hole is formed in one end, far away from the ball core (3), of the valve rod (6), and the inner hole and the valve rod (6) are arranged concentrically; one end of the top cover (7) positioned on the valve sleeve (5) is provided with a round hole coaxial with the valve rod (6); and a second spring (9) is arranged between the two inner holes and the round hole.
4. The splash proof drilling plug valve of claim 3, wherein: a lug is arranged at the bottom of the knob switch (4), and the lug is matched with a groove arranged on the ball core (3); the outer end face of the knob switch (4) is provided with a protrusion (C1), and the protrusion (C1) and one end of the through hole, which is far away from the ball core (3), are provided with a notch (C2) which are matched with each other.
5. The splash proof drilling plug valve of claim 1, wherein: the valve core assembly is installed and fixed on the inner wall of the valve body (1).
6. The splash proof drilling plug valve of claim 4, wherein: and a spherical sealing surface is arranged among the ball core (3), the valve sleeve (5) and the valve seat (2).
7. The splash proof drilling plug valve of claim 1, wherein: the valve sleeve (5) is fixed with the step through threads.
8. The splash proof drilling plug valve of claim 6, wherein: the valve sleeve is characterized in that annular grooves are formed in the circumferences of the valve sleeve (5), the valve seat (2), the knob switch (4) and the valve rod (6), and a first sealing element, a second sealing element, a third sealing element and a fourth sealing element which are used for sealing the valve sleeve (5), the valve seat (2), the knob switch (4) and the valve rod (6) are arranged in the annular grooves respectively.
9. The splash proof drilling plug valve of any of claims 1 to 8, wherein: and WC alloy layers are sprayed on the frustum surfaces of the valve rod (6) and the valve sleeve (5) which are connected with each other and the spherical sealing surfaces of the valve sleeve (5), the ball core (3) and the valve seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338602.8A CN112922549A (en) | 2021-03-30 | 2021-03-30 | Splash-proof well drilling plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338602.8A CN112922549A (en) | 2021-03-30 | 2021-03-30 | Splash-proof well drilling plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112922549A true CN112922549A (en) | 2021-06-08 |
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ID=76176477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110338602.8A Pending CN112922549A (en) | 2021-03-30 | 2021-03-30 | Splash-proof well drilling plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112922549A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988751A (en) * | 2023-09-26 | 2023-11-03 | 牡丹江通用石油工具有限公司 | Dual-channel plug valve |
-
2021
- 2021-03-30 CN CN202110338602.8A patent/CN112922549A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988751A (en) * | 2023-09-26 | 2023-11-03 | 牡丹江通用石油工具有限公司 | Dual-channel plug valve |
| CN116988751B (en) * | 2023-09-26 | 2023-12-15 | 牡丹江通用石油工具有限公司 | Dual-channel plug valve |
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