CN103742108B - The way to play for time of underground work well liquid balance and multifunctional buffer stream valve - Google Patents
The way to play for time of underground work well liquid balance and multifunctional buffer stream valve Download PDFInfo
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- CN103742108B CN103742108B CN201410032828.5A CN201410032828A CN103742108B CN 103742108 B CN103742108 B CN 103742108B CN 201410032828 A CN201410032828 A CN 201410032828A CN 103742108 B CN103742108 B CN 103742108B
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- oil pipe
- club
- inner sleeve
- liquid
- seating nipple
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Abstract
Disclosed by the invention be underground work well liquid balance way to play for time and multifunctional buffer stream valve, be applicable to multiple operations of oilfield downhole operation site operation.The way to play for time of underground work well liquid balance is in underground work pipe column, a buffering fluid valve is connected in the top of drift size gauge tool or other underground operation tool, make its down-hole string in decentralization process, effective control well liquid enters the speed of oil pipe inside, to allow in oil pipe liquid level lower than liquid level in sleeve pipe, make oily overpressure in a basic balance with cover overpressure, prevent well liquid from oil pipe splash to ground.Fluid valve comprises seating nipple, and seating nipple is connected with pressure cap, and seating nipple is built with two-way fluid control apparatus.Can balance liquid level in pit shaft, in lower oil pipe column process, oil pipe does not spray and does not overflow, and clean hygiene facilitates operation.Meet positive and negative well-flushing requirement simultaneously, ensure that for mud thorough, formation protection, not by secondary injury, solves the technical barrier that long-standing problem is produced.
Description
Technical field
The present invention relates to the Method and kit for of petroleum industry underground work, particularly underground work well liquid balance way to play for time and multifunctional buffer stream valve, be applicable to multiple operations of oilfield downhole operation site operation, particularly new well drifting construction, old well sand washing, brill plug, sleeve pipe scraping, fishing junk etc., liquid level in pit shaft can be balanced, prevent oil pipe hydrojet, meet positive and negative well-flushing requirement.
Background technology
Petroleum industry producing well is when underground work, often run into oil pipe in lower oil pipe column process, situation that sleeve pipe returns liquid simultaneously, sleeve pipe returns liquid can connect hose or other pipeline is discharged to appointed place, but oil pipe returns liquid but can only uncontrolledly be let alone to be sprayed at well head.When well liquid be oil or mud time, well head is seriously polluted, and used tool and wellhead equipment cannot normal operatings, operating personnel often emit oily rain or mud rain to construct, and often skid in underfooting, operating difficulties, there is great personal injury hidden danger, also affect construction speed.During current aboveground construction, in order to prevent the generation of above-mentioned phenomenon, convenient construction, be all generally install a ball-and-seat additional in the bottom of running string.Strictly say, this is a kind of violation phenomenon, because the inner chamber of institute's lower tubular column is empty, and is full in sleeve pipe, so just cause oil jacket annular space and oil pipe inner chamber pressure reduction excessive, great injury is caused to oil pipe, time serious, by oil pipe compressive strain, oil pipe subscription rate can be caused, not only cost of production increases, also operation can be caused to do over again simultaneously, incur loss through delay manufacturing schedule, increase the workload of workman.Bottom can only just well-flushing with the tubing string of ball-and-seat in addition, cannot carry out anti-flushing well construction.For for mud construction, can only just replace, so just can not by the mud of pit shaft for clean, after perforation, mud enters stratum, causes secondary pollution, seriously affects oily well yield.A kind of Method and kit for is badly in need of in production scene, solves the problem.
Summary of the invention
Object of the present invention is just to provide way to play for time and the multifunctional buffer stream valve of underground work well liquid balance, solve in current underground work lower tubular column process, oil pipe returns liquid and sprays the phenomenon of well head, makes running string not only can just well-flushing simultaneously, also can anti-flushing well.Convenient construction, reduction cost of production, the oil reservoir secondary pollution avoiding well-flushing thoroughly not cause.
The present invention is achieved in that
The way to play for time of underground work well liquid balance, in underground work pipe column, a buffering fluid valve is connected in the top of drift size gauge tool or other underground operation tool, make its down-hole string in decentralization process, effective control well liquid enters the speed of oil pipe inside, liquid level in oil pipe is allowed lower than liquid level in sleeve pipe, to make oily overpressure in a basic balance with cover overpressure, to prevent well liquid from oil pipe splash to ground.
Multifunctional buffer stream valve for the way to play for time realizing underground work well liquid balance comprises seating nipple, and seating nipple is connected with pressure cap, and seating nipple is built with two-way fluid control apparatus.
Described two-way fluid control apparatus comprises inner sleeve and club, and club is contained in inner sleeve, is inside arranged with annular seal space and liquid flow cavity, and the annular seal space of inner sleeve coordinates with the bulb of club.
Compared with prior art, remarkable result of the present invention is: this tool construction is simple, easy to use, low processing cost.This instrument is connected on running string, artificial increase pressure difference, alleviate speed and liquid measure that well liquid in lower tubular column process rises at oil pipe inner chamber, avoid oil pipe transfer way in spray well liquid, handled easily, improve safety factor, make the well liquid returned out in well be discharged to appointed place along sleeve pipe pipeline.Can balance borehole pressure, the pressure reduction of controlled liquefaction cover annular space and oil pipe inner chamber is less than 1 MPa simultaneously, and stop oil pipe and be crowded flat or squeeze the phenomenon of ruining, protection oil pipe is not damaged, and reduces cost of production.The present invention not only overcomes the problem of oil pipe fluid in current lower tubular column process, and eliminate all harm and consequence that oil pipe fluid causes, keep well head sanitation of environment, change over the adverse circumstances of that " oily rain is gravied with meat or vegetables poured over rice or noodles ", thoroughly improve the condition of work of operating personnel, improve production efficiency, eliminate worker's fidgety mood at work, accomplish safety in production.Meet the demand of well cleanout and reverse cleanout simultaneously, solve due to prior art, ball-and-seat is installed cannot the technical problem of anti-flushing well.Especially replace mud for new well, ensure that for mud thorough, formation protection, not by secondary injury, fundamentally solves the technical barrier that this long-standing problem is produced.The present invention proves through field experiment, and in lower oil pipe column process, oil pipe does not spray and do not overflow, and clean hygiene is easy to operate, thus accelerates job scheduling, improves production efficiency, also mitigates the labour intensity of workman simultaneously, ensure that safety in production.In whole work progress, the pressure reduction of oil jacket annular space and oil pipe inner chamber controls at about 1MPa, avoids due to the excessive damage caused oil pipe of lower ball-and-seat pressure reduction, protects oil pipe; During for mud, anti-normal for pressure, without building the pressure phenomenon, can construction requirement be met completely, ensureing for mud totally thorough, stop, due to for the mud thorough hidden danger of the perforation after stain oil reservoir caused, effectively to protect oil reservoir.Field experiment demonstrates the present invention and has significant economic benefit and social benefit, and application prospect is good, has good promotional value.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing in detail the present invention is described in detail, not limits the scope of the invention.
The way to play for time of underground work well liquid balance, in underground work pipe column, a buffering fluid valve is connected in the top of drift size gauge tool or other underground operation tool, make its down-hole string in decentralization process, effective control well liquid enters the speed of oil pipe inside, liquid level in oil pipe is allowed lower than liquid level in sleeve pipe, to make oily overpressure in a basic balance with cover overpressure, to prevent well liquid from oil pipe splash to ground.
Multifunctional buffer stream valve for the way to play for time realizing underground work well liquid balance comprises seating nipple 2, and seating nipple 2 is connected with pressure cap 1, and seating nipple 2 is built with two-way fluid control apparatus.Two-way fluid control apparatus comprises inner sleeve 3 and club 4, and club 4 is contained in inner sleeve 3, and inner sleeve 3 is provided with annular seal space and liquid flow cavity, and the annular seal space of inner sleeve 3 coordinates with the bulb of club 4.Inner sleeve 3 is cylindrical body, and in the middle part of it, internal diameter is little is annular seal space, two ends internal diameter is greatly liquid flow cavity, and the shell wall of liquid flow cavity is also provided with spout or hole, is provided with club through centre bore and spout or hole at cylinder body bottom.Club 4 one end is bulb, the other end is provided with screw thread mounting and adjusting nut 6 and back of the body cap 7, the middle part body of rod from the club of inner sleeve 3 through centre bore through, through the body of rod of the club 4 at centre bore two ends, top Compress Spring 5.1 and bottom Compress Spring 5.2 are installed at club.Packing ring is also equipped with in top compression spring 5.1 and bottom Compress Spring 5.2 two ends, and the systolic pressure of top compression spring 5.1 is set between 0.5-0.8MPa, and the systolic pressure of bottom Compress Spring 5.2 is set in 0.8-1.5MPa.The bottom Excircle machining oil tube external thread of seating nipple 2 is connected with oil pipe, top Excircle machining closely-pitched external screw thread is connected with pressure cap 1, inner circle is provided with spacing shoulder and installs inner sleeve 3.Pressure cap 1 top inner circle is provided with that oil pipe internal thread is connected with oil pipe, bottom inner circle is provided with closely-pitched internal thread and is connected with seating nipple 2, and the internal diameter of middle part inner circle is equal to or less than the internal diameter of inner sleeve 3, by pressure cap 1 by inner sleeve 3 shutoff in seating nipple 2.
During the assembling of this fluid valve, club 4 overlaps upper gasket and top compression spring 5.1 successively, load from inner sleeve 3 top, make club 4 through the club of inner sleeve 3 cylinder body bottom through centre bore, and then overlap top and the bottom Compress Spring 5.2 and packing ring successively.Adjusting nut 6 is screwed on the body of rod of club 4, adjusts the elasticity of top compression spring 5.1 and bottom Compress Spring 5.2, then with back of the body cap 7, adjusting nut 6 is carried on the back tightly.The two-way fluid control apparatus assembled is loaded from seating nipple 2 top, finally pressure cap 1 is connected with seating nipple 2.
During onsite application, this fluid valve is connected to the top of drift size gauge tool or other instrument, with running string G.I.H, in decentralization process, the bulb of club 4, under the adjustment of top compression spring 5.1 and bottom Compress Spring 5.2, realizes the action opening and closing inner sleeve 3 annular seal space, thus controlledly make well liquid enter oil pipe inner chamber, ensure oily overpressure all the time lower than oil jacket annular pressure, oil pipe there will not be the phenomenon of hydrojet, and liquid unnecessary in pit shaft is discharged from sleeve pipe.When pressure reduction between oil jacket annular space and oil pipe inner chamber reaches the numerical value of design, bottom Compress Spring 5.2 is compressed, and club 4 moves, and the annular seal space that bulb leaves inner sleeve 3 enters liquid flow cavity, opens fluid course.Liquid below this fluid valve is entered in the oil pipe of top by the annular seal space of inner sleeve 3, plays balance oil pipe and the effect of casing pressure, and remains there is certain pressure reduction between the two, to allow in oil pipe liquid level slightly lower than liquid level in sleeve pipe.When this instrument is after projected depth, suitable well-flushing mode can be selected according to different construction requirements to carry out anti-flushing well or positive well-flushing, realize various construction requirement.
Claims (5)
1. multifunctional buffer stream valve, comprises seating nipple (2), it is characterized in that, seating nipple (2) is connected with pressure cap (1), and seating nipple (2) is built with two-way fluid control apparatus; Two-way fluid control apparatus comprises inner sleeve (3) and club (4), and club (4) is contained in inner sleeve (3), and inner sleeve (3) is provided with annular seal space and liquid flow cavity, and the annular seal space of inner sleeve (3) coordinates with the bulb of club (4); Inner sleeve (3) is cylindrical body, be annular seal space in the middle part of it, two ends are liquid flow cavities, and middle part annular seal space internal diameter is little, two ends liquid flow cavity internal diameter is large, and the shell wall of liquid flow cavity is also provided with spout or hole, cylinder body bottom is provided with club through centre bore and spout or liquid flow hole; Club (4) one end is bulb, the other end is provided with screw thread mounting and adjusting nut (6) and back of the body cap (7), the middle part body of rod from the club of inner sleeve (3) through centre bore through, through the body of rod of the club (4) at centre bore two ends, top Compress Spring (5.1) and bottom Compress Spring (5.2) are installed at club.
2. multifunctional buffer stream valve according to claim 1, it is characterized in that, packing ring is also equipped with in described top compression spring (5.1) and bottom Compress Spring (5.2) two ends, the systolic pressure of top compression spring (5.1) is set between 0.5-0.8MPa, and the systolic pressure of bottom Compress Spring (5.2) is set in 0.8-1.5MPa.
3. multifunctional buffer stream valve according to claim 1, it is characterized in that, the bottom Excircle machining oil tube external thread of described seating nipple (2) is connected with oil pipe, top Excircle machining closely-pitched external screw thread is connected with pressure cap (1), inner circle is provided with spacing shoulder and installs inner sleeve (3).
4. multifunctional buffer stream valve according to claim 1, it is characterized in that, described pressure cap (1) top inner circle is provided with that oil pipe internal thread is connected with oil pipe, bottom inner circle is provided with that closely-pitched internal thread is connected with seating nipple (2), the internal diameter of middle part inner circle is equal to or less than the internal diameter of inner sleeve (3).
5. use the way to play for time of the underground work well liquid balance of multifunctional buffer stream valve described in claim 1, it is characterized in that, in underground work pipe column, in drifting construction, old well sand washing, bore plug, the top of sleeve pipe scraping and fishing junk underground operation tool connects a buffering fluid valve, make its down-hole string in decentralization process, effective control well liquid enters the speed of oil pipe inside, to allow in oil pipe liquid level lower than liquid level in sleeve pipe, make oily overpressure in a basic balance with cover overpressure, prevent well liquid from oil pipe splash to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032828.5A CN103742108B (en) | 2014-01-24 | 2014-01-24 | The way to play for time of underground work well liquid balance and multifunctional buffer stream valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032828.5A CN103742108B (en) | 2014-01-24 | 2014-01-24 | The way to play for time of underground work well liquid balance and multifunctional buffer stream valve |
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| Publication Number | Publication Date |
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| CN103742108A CN103742108A (en) | 2014-04-23 |
| CN103742108B true CN103742108B (en) | 2016-03-30 |
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| CN201410032828.5A Expired - Fee Related CN103742108B (en) | 2014-01-24 | 2014-01-24 | The way to play for time of underground work well liquid balance and multifunctional buffer stream valve |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671064A (en) * | 2019-10-30 | 2020-01-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil well sand washing liquid returning stop valve and using method thereof |
| CN113756746B (en) * | 2020-06-05 | 2023-07-25 | 中国石油天然气股份有限公司 | Self-control valve |
| CN112127859A (en) * | 2020-11-02 | 2020-12-25 | 沧州瑞泰石油机械有限公司 | Two-way flow control valve, water control screen pipe and well completion pipe string |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2688867Y (en) * | 2004-04-15 | 2005-03-30 | 李广峰 | Piston square drilling rod antisputtering jointers |
| CN201507273U (en) * | 2009-10-23 | 2010-06-16 | 扬州市驰城石油机械有限公司 | Kelly bar splash valve |
| CN201521255U (en) * | 2009-10-20 | 2010-07-07 | 大庆石油管理局 | Novel anti-splash joint |
| CN202012329U (en) * | 2011-02-10 | 2011-10-19 | 天合石油集团汇丰石油装备股份有限公司 | Mud anti-splashing valve for kelly bar |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6401823B1 (en) * | 2000-02-09 | 2002-06-11 | Shell Oil Company | Deepwater drill string shut-off |
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2014
- 2014-01-24 CN CN201410032828.5A patent/CN103742108B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2688867Y (en) * | 2004-04-15 | 2005-03-30 | 李广峰 | Piston square drilling rod antisputtering jointers |
| CN201521255U (en) * | 2009-10-20 | 2010-07-07 | 大庆石油管理局 | Novel anti-splash joint |
| CN201507273U (en) * | 2009-10-23 | 2010-06-16 | 扬州市驰城石油机械有限公司 | Kelly bar splash valve |
| CN202012329U (en) * | 2011-02-10 | 2011-10-19 | 天合石油集团汇丰石油装备股份有限公司 | Mud anti-splashing valve for kelly bar |
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| CN103742108A (en) | 2014-04-23 |
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Granted publication date: 20160330 Termination date: 20180124 |