CN112031686A - Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method - Google Patents
Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method Download PDFInfo
- Publication number
- CN112031686A CN112031686A CN202010963808.5A CN202010963808A CN112031686A CN 112031686 A CN112031686 A CN 112031686A CN 202010963808 A CN202010963808 A CN 202010963808A CN 112031686 A CN112031686 A CN 112031686A
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- wellhead
- valve
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- hole
- drilling
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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
A circulating valve special for a wellhead, drilling equipment adopting the circulating valve and a drilling method. The special circulating valve for the wellhead comprises a main body shell, wherein an upper joint and a lower joint are arranged on the main body shell; a cavity is formed in the main body shell, and a valve and a piston cavity are arranged in the cavity; wherein, a piston is arranged in the piston cavity and can move between a first position and a second position; two through holes are arranged on the side wall of the main body shell, wherein a closed space is formed between one through hole and the piston, and when driving liquid is input from the through hole, the piston can be pushed to move from the second position to the first position; wherein the piston wall is also provided with a through hole which, when the piston is in the first position, is in partial or complete communication with another through hole in the side wall of the main body housing, so that the input drilling fluid can flow through the inner cavity to the lower connector. The special circulating valve for the wellhead is convenient for replacing a drill rod and a drill collar, does not need to interrupt slurry circulation, and can perform uninterrupted circulating well killing operation when a top drive fails or has an accident.
Description
Technical Field
The invention relates to the field of oil drilling and exploitation equipment, in particular to a special circulating valve for a wellhead, and particularly relates to a special circulating valve for a wellhead, which is convenient for replacing a drill rod and a drill collar and does not interrupt slurry circulation in an oil drilling process, drilling equipment adopting the special circulating valve and a drilling method.
Background
In the oil drilling process, the formation pressure changes greatly, and some horizon pressures are high, and some horizon pressures are low, only through adjusting mud proportion, establish the circulation and come balanced formation pressure, avoid blowout and lost circulation.
In the drilling process, blowout and lost circulation are easy to cause major accidents, and only when the mud is continuously circulated, a stable well wall is formed in a shaft, so that the pressure of the shaft and the formation is balanced, and the major accidents cannot occur in the drilling process. When the stratum pressure is unstable in the drilling process of the existing drilling equipment, the actions of replacing a drill rod and a drill column are very quick, the time of not circulating mud is shortened, the stability of the wall of a well in a shaft is improved, and the major accidents of blowout, well leakage and the like can be avoided or slowed down, so that the high requirements are provided for operators, the burden of the operators is relieved, and the technical problem which needs to be solved urgently at present is to improve and enhance the operation stability and the safety.
Disclosure of Invention
In view of the above, the present invention provides a circulation valve dedicated for wellhead, a drilling device using the circulation valve, and a drilling method, so as to at least partially solve at least one of the above technical problems.
To achieve the above object, as one aspect of the present invention, there is provided a circulation valve dedicated to a wellhead, including a main body housing, wherein:
the main body shell is provided with an upper joint and a lower joint;
a cavity communicated up and down is formed in the main body shell, and a valve and a piston cavity for controlling the cavity to be communicated up and down are arranged in the cavity; the piston cavity is internally provided with a piston with a communication channel in the middle, the piston can move between a first position and a second position in the piston cavity, and a first reset mechanism is arranged between the piston and the main body shell;
the side wall of the main body shell is provided with two through holes, wherein a closed space is formed between the interior of the first through hole and the piston, and when driving liquid is input from the first through hole, the piston can be pushed to move from the second position, where the first resetting mechanism is unfolded, to the first position, where the first resetting mechanism is stressed, in the piston cavity; the second through hole is used for inputting drilling fluid;
and when the piston moves to the first position, the third through hole is partially or completely communicated with the second through hole, so that the drilling fluid input by the second through hole can flow to the lower connector through the inner cavity of the main body shell.
As a further aspect of the present invention, there is also provided a drilling apparatus employing the wellhead-specific circulation valve as described above.
As still another aspect of the present invention, there is also provided a drilling method using the above-described wellhead-dedicated circulation valve, including the steps of:
when drilling, the special circulating valve for the wellhead is connected to a drill collar or a drill rod, and the drilling fluid enters the special circulating valve for the wellhead through top drive and then enters the drill rod or the drill collar through the special circulating valve for the wellhead;
and performing drilling operation.
As still another aspect of the present invention, there is also provided a drilling method using the above-described wellhead-dedicated circulation valve, comprising the steps of:
when the drill rod or the drill collar is replaced, the drill rod or the drill collar is clamped, and the quick joint is respectively connected with the first through hole and the second through hole on the side surface of the special circulating valve for the wellhead and is simultaneously sealed; and the top drive closes the circulation, the quick joint opens the circulation, the drilling fluid enters the first through hole of the wellhead special circulation valve from the quick joint and then pushes the piston to move, the second through hole is communicated with the third through hole after the pressure reaches a certain value, and the drilling fluid enters the inside of the drill rod along the second through hole.
Based on the technical scheme, compared with the prior art, the special circulating valve for the wellhead, the drilling equipment adopting the special circulating valve and the drilling method have at least one of the following beneficial effects:
1. the drill rod and the drill collar are convenient to replace, and mud circulation does not need to be interrupted;
2. the tool can be applied to the drilling process and the drilling construction process of uninterrupted circulating mud, and can be used for carrying out uninterrupted circulating well killing operation when the top drive fails or has an accident.
Drawings
FIG. 1 is an assembled longitudinal section of a wellhead specific circulation valve of the present invention;
FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 3 is a longitudinal cross-sectional schematic illustrating the position of components of the wellhead specific circulation valve of the present invention in the drilling mode;
FIG. 4 is a longitudinal cross-sectional schematic of the element position for a side cycle condition of the wellhead specific circulation valve of the present invention.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments. Because the position of the product can be changed at will, the terms of orientation such as "up", "down", "left", "right" and the like in the invention only indicate relative position relationship, but are not used to limit absolute position relationship. In the following description, for convenience of description, the wellhead specific circulation valve of the present invention will be illustrated in a vertically disposed manner, with an upper joint at an upper end and a lower joint at a lower end, as shown in fig. 1, 3 and 4 of the present invention.
The invention relates to a special circulating valve for a wellhead, which is connected to the upper part of a drill rod or a drill collar.
Specifically, the circulation valve for a wellhead of the present invention comprises a main body housing, wherein:
the main body shell is provided with an upper joint and a lower joint;
a cavity communicated up and down is formed in the main body shell, and a valve and a piston cavity capable of controlling the up-down communication state in the cavity are arranged in the cavity; the piston cavity is internally provided with a piston with an upper and lower communicating channel in the middle, the piston can move between a first position and a second position in the piston cavity, and a first reset mechanism is arranged between the piston and the main body shell; be provided with two through-holes on main body cover's the lateral wall: the first through hole is used for inputting piston driving liquid so as to push the piston to move from a second position, stretched by the first resetting mechanism, to a first position, stressed by the first resetting mechanism, in the piston cavity, and the second through hole is used for inputting drilling fluid;
the piston wall is also provided with a third through-hole which is in partial or complete communication with the second through-hole when the piston is moved to the first position.
The valve is a one-way valve, preferably, the one-way valve comprises a valve plate pin shaft and a valve plate, and further preferably, a second reset unit, for example, a reset spring such as a torsion spring, is arranged on the valve plate.
And a sealing space is formed between the interior of the first through hole and the flange of the piston, and the piston flange is pushed to drive the whole piston to move when the piston driving liquid is injected.
The invention also discloses drilling equipment adopting the special circulating valve for the wellhead.
The invention also discloses a well drilling method adopting the special circulating valve for the wellhead, which comprises the following steps:
when drilling, the special circulating valve for the wellhead is connected to a drill collar or a drill rod, and the drilling fluid enters the special circulating valve for the wellhead through top drive and then enters the drill rod or the drill collar through the special circulating valve for the wellhead; or
When the drill rod or the drill collar is replaced, the drill rod or the drill collar is clamped, and the quick joint is respectively connected with the first through hole and the second through hole on the side surface of the special circulating valve for the wellhead and is simultaneously sealed; the top drive closes the circulation, the quick connector opens the circulation, the drilling fluid enters the first through hole of the special circulating valve for the wellhead from the quick connector and pushes the piston to move, the second through hole is communicated with the special circulating valve for the wellhead after the pressure reaches a certain value, the drilling fluid enters the interior of the drill rod along the second through hole, the valve plate is in a closed state at the moment, and the special circulating valve for the wellhead and the drill rod are detached by rotating the top drive.
The technical scheme of the invention is further explained by combining the drawings and the specific embodiments in the specification. It should be noted that the following specific examples are given for illustrative purposes only and are not intended to limit the present invention.
As shown in figures 1-4, in the drilling process, the special circulating valve for the wellhead is connected with a drill collar or a drill rod and is placed on a workbench for standby, and the special circulating valve for the wellhead is connected to the upper part of the drill collar. Connecting a drill rod and a drill collar which are connected with a special circulating valve for the wellhead in advance with a lower tool for drilling operation, wherein the drilling fluid enters the inside of the special circulating valve for the wellhead through top drive and then enters the drill rod or the drill collar through the special circulating valve for the wellhead; when the drill rod or the drill collar is replaced, the portable slips are seated on the wellhead to clamp the drill rod, the quick connector is connected with the second through hole in the side face of the special circulating valve for the wellhead, the top drive is closed to circulate, the quick connector is opened to circulate, drilling fluid enters the special circulating valve for the wellhead from the quick connector and then enters the drill rod, and at the moment, the top drive is detached to be connected with the next drill rod. Because the upper part of the special circulating valve for the wellhead is provided with the valve plate structure, mud can be prevented from being sprayed out from the upper part of the special circulating valve for the wellhead, and the circulating process of the whole drilling string is completed simultaneously.
In the specific embodiment, the circulation valve special for the wellhead comprises a main body mandrel (main body shell) 1, a valve plate pin shaft 2, a valve plate 3, a return spring (first return mechanism) 4, a balance hole (first through hole) 5, an overflowing piston (piston) 6, an overflowing hole (second through hole) 7, a sealing ring 8, an overflowing hole (third through hole) 9 in the piston and the like.
The upper part of the main body mandrel 1 is designed with standard drill rod threads for connecting a drill rod and a top drive. A valve plate 3 is designed and processed in an inner cavity of the upper portion of a main body mandrel 1 and is connected with the main body mandrel 1 through a valve plate pin shaft 2, and a valve plate torsion spring 10 is installed between the valve plate and the pin shaft.
A return spring 4 is arranged in the middle of a main body mandrel 1, an overflowing piston 6 is arranged below the return spring 4, a sealing ring 8 is arranged on the overflowing piston 6, and an overflowing hole 9 is arranged on the piston. And a sealing ring 8 sealed with the overflowing piston 6 is arranged on the main body mandrel 1 and used for sealing the overflowing piston 6. The lower part of the main body mandrel 9 is designed and processed with a drill rod sealing thread.
The invention is connected with the overflowing hole 7 through the quick connector, and simultaneously the balance hole 5 is communicated to drive the overflowing piston to move. After the quick connector is disassembled, the overflowing piston is pushed to the bottom dead center position (second position) by the return spring.
In yet another embodiment, the upper part of the circulation valve for wellhead specific use of the invention is designed with a drill pipe thread, by means of which it is connected with a drill pipe or a top drive. The lower part is designed with drill rod threads which can be connected with a drill rod and a drill string.
The special circulating valve for the well head is pre-connected to each drill rod, and the upper part of the special circulating valve is not connected with other special circulating valves for the well head. In the drilling process, the lower part of the special circulating valve for the wellhead is connected with a drill rod, and the upper part of the special circulating valve for the wellhead is connected with a top drive. When the drill rod is replaced, the quick connector is connected with the special circulating valve for the well head, and the quick connector is communicated with the balance hole 5 and the overflowing hole 7 of the special circulating valve for the well head and is sealed at the same time. The top drive closes the cycle, and the valve plate 3 closes the valve plate under the effect of valve plate torsional spring 10. The quick connector injects drilling fluid into the special circulating valve for the wellhead, a part of the drilling fluid enters the special circulating valve for the wellhead along the balance hole 5 and enters a sealing cavity formed by the combination of the overflowing piston 6 and the main body mandrel 1, and along with the increase of pressure, the drilling fluid pushes the overflowing piston 6, compresses the return spring 4 and moves upwards. When the pressure reaches a certain value, the overflowing hole 9 in the overflowing piston 6 is aligned with the overflowing hole 7 in the main body mandrel, drilling fluid enters the drill rod along the overflowing hole, the valve plate 3 is in a closed state at the moment, and the special circulating valve for the wellhead and the drill rod can be detached by rotating the top drive.
And lifting the top drive, connecting the other drill rod connected with the special circulating valve of the wellhead with the circulating drill string, and buckling the drill rod to be connected with the top drive. At this point the supply of quick connector drilling fluid is closed while the top drive drilling fluid circulation is opened. When the slurry supply of the quick connector is closed, the spring pushes the overflowing piston to move downwards under the action of the return spring, the overflowing hole on the closed overflowing piston is displaced from the overflowing hole on the main body mandrel, hole positions are not aligned, and the slurry cannot flow into the special circulating valve of the wellhead from the quick connector or flow into the quick connector from the special circulating valve of the wellhead. At the moment, the drilling fluid enters the drill rod from the top drive, and normal drilling construction can be carried out.
The invention is mainly applied to the drilling construction process of uninterrupted circulating mud, and can also be applied to the sudden working condition aiming at the top drive accident and incapable of circularly drilling.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A wellhead-specific circulation valve, comprising a body housing, wherein:
the main body shell is provided with an upper joint and a lower joint;
a cavity communicated up and down is formed in the main body shell, and a valve and a piston cavity for controlling the cavity to be communicated up and down are arranged in the cavity; the piston cavity is internally provided with a piston with a communication channel in the middle, the piston can move between a first position and a second position in the piston cavity, and a first reset mechanism is arranged between the piston and the main body shell;
the side wall of the main body shell is provided with two through holes, wherein a closed space is formed between the interior of the first through hole and the piston, and when driving liquid is input from the first through hole, the piston can be pushed to move from the second position, where the first resetting mechanism is unfolded, to the first position, where the first resetting mechanism is stressed, in the piston cavity; the second through hole is used for inputting drilling fluid;
and when the piston moves to the first position, the third through hole is partially or completely communicated with the second through hole, so that the drilling fluid input by the second through hole can flow to the lower connector through the inner cavity of the main body shell.
2. The wellhead-specific circulation valve of claim 1, wherein the valve is a one-way valve.
3. The wellhead-specific circulation valve of claim 2, wherein the valve is a one-way valve comprising a valve plate pin and a valve plate.
4. The wellhead-specific circulation valve according to claim 3, wherein a second reset unit is provided on the valve plate.
5. The wellhead-specific circulation valve according to claim 4 wherein the second return element is a torsion spring.
6. A drilling device using the circulation valve special for the wellhead as claimed in any one of claims 1 to 5.
7. A drilling method using the circulation valve special for the wellhead as claimed in any one of claims 1 to 5, comprising the following steps:
when drilling, the special circulating valve for the wellhead is connected to a drill collar or a drill rod, and the drilling fluid enters the special circulating valve for the wellhead through top drive and then enters the drill rod or the drill collar through the special circulating valve for the wellhead;
and performing drilling operation.
8. A drilling method using the circulation valve special for the wellhead as claimed in any one of claims 1 to 5, comprising the following steps:
when the drill rod or the drill collar is replaced, the drill rod or the drill collar is clamped, and the quick joint is respectively connected with the first through hole and the second through hole on the side surface of the special circulating valve for the wellhead and is simultaneously sealed; and the top drive closes the circulation, the quick joint opens the circulation, the drilling fluid enters the first through hole of the wellhead special circulation valve from the quick joint and then pushes the piston to move, the second through hole is communicated with the third through hole after the pressure reaches a certain value, and the drilling fluid enters the inside of the drill rod along the second through hole.
9. The method of drilling of claim 8, further comprising the step of rotating the top drive to remove the wellhead specific circulation valve and drill pipe after performing the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963808.5A CN112031686A (en) | 2020-09-14 | 2020-09-14 | Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963808.5A CN112031686A (en) | 2020-09-14 | 2020-09-14 | Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112031686A true CN112031686A (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010963808.5A Pending CN112031686A (en) | 2020-09-14 | 2020-09-14 | Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method |
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| CN (1) | CN112031686A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226382A (en) * | 2011-05-19 | 2011-10-26 | 深圳市远东石油钻采工程有限公司 | Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method |
| US20110308860A1 (en) * | 2010-06-18 | 2011-12-22 | Deboer Luc | Continuous Circulating Sub for Drill Strings |
| CN202745760U (en) * | 2012-07-20 | 2013-02-20 | 长江大学 | Uninterrupted drilling fluid circulating valve |
| CN103046883A (en) * | 2012-12-21 | 2013-04-17 | 成都欧迅海洋工程装备科技有限公司 | Continuous cyclic drilling process applicable to air drilling |
| US20130319767A1 (en) * | 2011-01-21 | 2013-12-05 | Weatherford/Lamb, Inc. | Telemetry operated circulation sub |
| CN109138877A (en) * | 2018-08-15 | 2019-01-04 | 博德世达（天津）能源科技有限公司 | Fixed ball seat circulating valve, using its drilling equipment and drilling well, blocking method |
| CN212583653U (en) * | 2020-09-14 | 2021-02-23 | 北京博德世达石油技术股份有限公司 | Special circulating valve for wellhead and drilling equipment adopting same |
-
2020
- 2020-09-14 CN CN202010963808.5A patent/CN112031686A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110308860A1 (en) * | 2010-06-18 | 2011-12-22 | Deboer Luc | Continuous Circulating Sub for Drill Strings |
| US20130319767A1 (en) * | 2011-01-21 | 2013-12-05 | Weatherford/Lamb, Inc. | Telemetry operated circulation sub |
| CN102226382A (en) * | 2011-05-19 | 2011-10-26 | 深圳市远东石油钻采工程有限公司 | Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method |
| CN202745760U (en) * | 2012-07-20 | 2013-02-20 | 长江大学 | Uninterrupted drilling fluid circulating valve |
| CN103046883A (en) * | 2012-12-21 | 2013-04-17 | 成都欧迅海洋工程装备科技有限公司 | Continuous cyclic drilling process applicable to air drilling |
| CN109138877A (en) * | 2018-08-15 | 2019-01-04 | 博德世达（天津）能源科技有限公司 | Fixed ball seat circulating valve, using its drilling equipment and drilling well, blocking method |
| CN212583653U (en) * | 2020-09-14 | 2021-02-23 | 北京博德世达石油技术股份有限公司 | Special circulating valve for wellhead and drilling equipment adopting same |
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