CN101864924A - Method for drilling spot plugging - Google Patents
Method for drilling spot plugging Download PDFInfo
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- CN101864924A CN101864924A CN 201010212911 CN201010212911A CN101864924A CN 101864924 A CN101864924 A CN 101864924A CN 201010212911 CN201010212911 CN 201010212911 CN 201010212911 A CN201010212911 A CN 201010212911A CN 101864924 A CN101864924 A CN 101864924A
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- plugging
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Abstract
The invention relates to a method for drilling spot plugging. An upper connector of a plugging device of a device for drilling spot plugging is connected with a drill column, and the upper part of the drill column is connected with a water tap which is connected with a mud pump by a water hose; after the device for drilling spot plugging descends to a leak point of a well wall, the mud pump is opened to pour liquid from the inside of a drill pipe so as to make a sliding sleeve in a plugging steel ball seal move downwards under the pressure of mud; under the action of the thrust of the sliding sleeve, a central slide bar moves downwards; a lower sealing baffle is opened; the sliding sleeve stops when arriving at the position of a limiting retainer ring; and the mud squeezes plugging materials into the stratum by radial through holes and vertical through holes to realize spot plugging and squeeze the plugging materials into the stratum. The method has the advantages that: the method for drilling spot plugging has strong plugging pertinence, can meet the requirement of common plugging, can regularly deliver expandable plugging materials to a leak stratum part, and improves the pressure resistance of the stratum plugged by the expandable plugging materials.
Description
Technical field
The present invention relates to a kind of method of drilling spot plugging.
Background technology
The challenge that leakage is ubiquity in the petroleum works, often run into.Because the down-hole complexity that leakage causes, it is very harmful that drilling well, completion are constructed, and leakage is the problem that domestic and international petroleum works circle are paid close attention to always.In the drillng operation,, not only incur loss through delay drilling time in case miss, the loss drilling fluid, infringement oil-gas Layer etc., but also may cause that borehole well instability causes a series of complex situations and accidents such as well slough, bit freezing, blowout, even cause well to be scrapped, cause heavy economic losses.
In drilling process, because complex formation, reservoir pressure coefficient changes greatly, and drop ply position is difficult for determining.The interval that produces leakage is often at foot of hole, even along with the deepening continuously of drillng operation, and the stratum of former shutoff tends to produce repeats leakage.If adopt traditional blocking method, often loss circulation material is crowded with all wellbore spaces below the leakage points, can cause the significant wastage of loss circulation material like this, and prolong the activity duration, improved the leak stopping cost.In addition, along with the development of leakage stopping technology, very big variation has also taken place in loss circulation material, and the big material of a lot of expansion rate of water absorption is arranged, and is used for the stratum leak stopping as gelatin polymer etc.Yet, these material water-swellable speed are difficult to control, sometimes loss circulation material does not also enter the just imbibition of predetermined stratum, when being scheduled to the stratum by the time, gel volume after the expansion can't enter the space, stratum greater than the volume of crack, hole and solution cavity, even clamp-on the stratum, loss circulation material has lost the space of further expansion, its plugging strength seriously descends, and has lost the purpose of leak stopping basically.
Summary of the invention
Problem to be solved by this invention is to propose a kind of drilling spot plugging method at above-mentioned prior art, and its plugging strength height greatly improves business efficiency, and is simple to operate.
The present invention for the solution that problem adopted of the above-mentioned proposition of solution is: the method for drilling spot plugging is characterized in that including following steps:
1), calculates the volume of the loss circulation material that need clamp-on borehole wall leakage space according to borehole wall leakage space size L;
2) according to the stereometer of loss circulation material calculate leak stopping casing volume, casing length and center litter length and be connected;
3) loss circulation material is packed into space between sleeve pipe and the center litter, the device of assembling drilling spot plugging;
4) position calculation according to borehole wall leakage points goes out the distance of the device bottom of drilling spot plugging to well head, device for plugging top connection jointed rod post with the device of drilling spot plugging, drill string top connects water tap, is connected by hose between water tap and the slush pump;
5) with after arriving borehole wall leakage points under the device of drilling spot plugging, open slush pump, slush pump injects liquid from drilling rod is inner, under mud pressure, make the sliding sleeve of leak stopping steel ball sealing inside and move downward, under the sliding sleeve thrust, the center slide bar moves downward, open the lower seal baffle plate, when moving to spacing back-up ring position, sliding sleeve stops, mud passes through radial direction through hole, vertical through holes is clamp-oned the stratum with loss circulation material, realize the purpose of spot plugging and loss circulation material is clamp-oned the stratum, the device with drill string and drilling spot plugging proposes well head then, finishes plugging operations.
The present invention is according in the Process of Oil Well Drilling, well depth, complex formation, and miss through regular meeting on the stratum, causes enormous economic loss.Oil drilling complex formation, leakage points be not often in the shaft bottom, and along with the increase of the drillng operation degree of depth, the position can be missed again in stifled originally stratum or the well after leak stopping was finished sometimes.The present invention is loaded on special leak stoppage tool with loss circulation material, with drilling rod the leak stopping special tool is transported to leakage position, stratum, with high pressure slurry pump liquid is injected from drilling rod is inner, under mud pressure, make the inner sliding sleeve of leak stopping steel ball sealing, thereby sliding sleeve is moved downward, under the sliding sleeve thrust, slide bar moves downward, and opens the lower seal baffle plate.When sliding sleeve moves to spacing back-up ring position, stop, mud by radially, vertical through holes clamp-ons the stratum with loss circulation material, realizes the purpose of spot plugging.
Beneficial effect of the present invention is:
Leak stopping of the present invention is with strong points, not only can satisfy conventional leak stopping, and expandable plugging additives regularly can be transported to leakage position, stratum, and slowed down the expansion of expansion loss circulation material in course of conveying, improved the anti-pressure ability on expandable plugging additives shutoff stratum.In addition, this blocking method can be implemented spot plugging to the leakage in the middle of the well section, has changed the method that loss circulation material in the past need be filled whole pit shaft, not only saves cost, good, the economical and efficient of plugging effect, and simple to operate, easy to use.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram of drilling spot plugging of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to structural representation;
Fig. 3 is that the B-B of Fig. 1 is to structural representation;
Fig. 4 is that the C-C of Fig. 1 is to structural representation.
Among the figure, the 1-drill string; The top connection of 2-device for plugging; 3-leak stopping steel ball; The 4-support ring; The 5-sealing ring; The 6-pin; 7-center sliding sleeve; The 8-plug; The outer pipe through-hole of 9-; The spacing back-up ring of 10-, 11-center litter; The 12-sleeve pipe; 13-lower seal baffle plate; The 14-collar; 15-sliding sleeve through hole; The 16-radial direction through hole; The 17-vertical through holes.
The specific embodiment
Be described in further detail the present invention below in conjunction with accompanying drawing by embodiment, but embodiment can not be construed as limiting the invention.
After the device assembling of drilling spot plugging is a technology short circuit, wherein device for plugging top connection 2 is the main body of short circuit, pipe through-hole 9 outside this body bottom radially is processed with (pipe through-hole is 120 ° of distributions at horizontal plane outside 3), vertical through holes 17 and radial direction through hole 16 (3 radial direction through hole 16 are 120 ° of distributions at horizontal plane), radial direction through hole 16 and vertical through holes 17 are communicated with, for the ease of processing and assurance radial direction through hole 16 and vertical through holes 17 connections, radial direction through hole 16 is outside by plug 8 sealings;
Spacing back-up ring 10 is installed in device for plugging top connection 2 interior lower end, connects threadably between spacing back-up ring 10 and the device for plugging top connection 2, connects with sliding type between the endoporus of spacing back-up ring and the center litter 11;
Device for plugging top connection 2 inner upper end are provided with center sliding sleeve 7, and its top is equipped with leak stopping steel ball 3, and collar 14 is installed in the top of support ring 4, by screw thread and device for plugging top connection 2 to be threaded.
Internal diameter top in device for plugging top connection 2 is processed with an interior shoulder, and support ring 4 and sealing ring 5 are installed on interior shoulder; Position radial direction at the A-A of this device for plugging top connection section is processed with three apertures, is used for installing pin 6, is used for fixing the center sliding sleeve;
Sliding sleeve bottom, center is processed with sliding sleeve through hole 15, and connection center, sliding sleeve bottom, center litter 11, and the lower thread of center litter connects baffle plate 13, and baffle plate connects with inserting mode with the sleeve pipe 12 that device for plugging top connection 2 lower ends are connected.
Introduce spot plugging work operations principle of the present invention below in detail
According to the leakage formation condition, estimate borehole wall leakage space (space, crack and solution cavity) size, according to borehole wall leakage space size L, calculate the volume of the loss circulation material that need clamp-on borehole wall leakage space, the length of calculating leak stopping casing volume, casing length and center litter according to the stereometer of loss circulation material also is connected, with pack into space between sleeve pipe and the center litter of loss circulation material, the internal diameter of supposing sleeve pipe 12 is d, the external diameter of center litter 11 is D, borehole wall leakage space size is L, then needs the minimum length of adapter sleeve tubing string to be
The device of assembling drilling spot plugging.
Position calculation according to borehole wall leakage points goes out the distance of the device bottom of drilling spot plugging to well head, device for plugging top connection 2 jointed rod posts 1 with the device of drilling spot plugging, drill string top connects water tap, is connected by hose between water tap and the slush pump.
With the under shield position of the device of drilling spot plugging down behind borehole wall leakage points position (generally being borehole wall leakage points foot), open slush pump, slush pump injects liquid from drilling rod is inner, under mud pressure, make the sliding sleeve of leak stopping steel ball sealing inside and move downward, under the sliding sleeve thrust, the center slide bar moves downward, open the lower seal baffle plate, when moving to spacing back-up ring position, sliding sleeve stops, mud passes through radial direction through hole, vertical through holes is clamp-oned the stratum with loss circulation material, realize the purpose of spot plugging and loss circulation material is clamp-oned the stratum, the device with drill string and drilling spot plugging proposes well head then, finishes plugging operations.
The device of drilling spot plugging of the present invention is gone into the well in the process, because not leakage fully of drilling fluid sometimes, in order to reduce not miss the buoyancy of mud in the well to device, avoid the mud pulsation to cause hole instability, mud can pass through outer pipe through-hole 9 and sliding sleeve through hole 15 in the well, crowdedly drives the leak stopping steel ball and enters drilling rod inside.When whole device arrives the precalculated position down, open high pressure slurry pump, promoting leak stopping steel ball 3 and center sliding sleeve 7 under mud pressure cuts off pin 6, center sliding sleeve 7 and center litter 11 are to lower slider, the following snap-in baffle plate 13 of lowermost end is opened with sleeve pipe 12, mud enters sleeve pipe by radial direction through hole 16 and vertical through holes 17, and loss circulation material is clamp-oned borehole wall shutoff formation leakage space.Snap-in baffle plate plays the bottom position-limiting action down, prevents that loss circulation material from entering the pit shaft bottom.
This method can play the effect of spot plugging to the leakage points of optional position in the pit shaft, needs loss circulation material to fill with leak stopping before having overcome and taps determining of whole pit shaft, has saved cost and plugging time, plays the purpose of leak stopping rapidly and efficiently.
Claims (1)
1. the method for drilling spot plugging is characterized in that including following steps:
1), calculates the volume of the loss circulation material that need clamp-on borehole wall leakage space according to borehole wall leakage space size L;
2) according to the stereometer of loss circulation material calculate leak stopping casing volume, casing length and center litter length and be connected;
3) loss circulation material is packed into space between sleeve pipe and the center litter, the device of assembling drilling spot plugging;
4) position calculation according to borehole wall leakage points goes out the distance of the device bottom of drilling spot plugging to well head, device for plugging top connection jointed rod post with the device of drilling spot plugging, drill string top connects water tap, is connected by hose between water tap and the slush pump;
5) with after arriving borehole wall leakage points under the device of drilling spot plugging, open slush pump, slush pump injects liquid from drilling rod is inner, under mud pressure, make the sliding sleeve of leak stopping steel ball sealing inside and move downward, under the sliding sleeve thrust, the center slide bar moves downward, open the lower seal baffle plate, when moving to spacing back-up ring position, sliding sleeve stops, mud passes through radial direction through hole, vertical through holes is clamp-oned the stratum with loss circulation material, realize the purpose of spot plugging and loss circulation material is clamp-oned the stratum, the device with drill string and drilling spot plugging proposes well head then, finishes plugging operations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010212911 CN101864924A (en) | 2010-06-30 | 2010-06-30 | Method for drilling spot plugging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010212911 CN101864924A (en) | 2010-06-30 | 2010-06-30 | Method for drilling spot plugging |
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| CN101864924A true CN101864924A (en) | 2010-10-20 |
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| CN 201010212911 Pending CN101864924A (en) | 2010-06-30 | 2010-06-30 | Method for drilling spot plugging |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351603A (en) * | 2016-08-24 | 2017-01-25 | 中国石油集团渤海钻探工程有限公司 | Crack or cave serious leakage plugging method and plugging material feeding pipe string |
| CN108505968A (en) * | 2018-05-10 | 2018-09-07 | 中国地质大学（武汉） | A kind of site-directed quantitative slurry casting machine and system |
| CN109944582A (en) * | 2018-12-29 | 2019-06-28 | 贵州省地质矿产勘查开发局一一五地质大队 | Method for analyzing position of stratum containing fractures in shaft |
| CN109989726A (en) * | 2018-11-22 | 2019-07-09 | 上海中煤物探测量有限公司 | Cellular-type underground, which pinpoints syringe and its applies, is repairing the method in water supply well |
| CN112004986A (en) * | 2018-02-14 | 2020-11-27 | 沙特阿拉伯石油公司 | Repairing lost circulation zones in wellbores |
| CN112983341A (en) * | 2019-12-13 | 2021-06-18 | 中国石油天然气股份有限公司 | Leakage stopping device and leakage stopping method |
| CN113818800A (en) * | 2021-10-20 | 2021-12-21 | 中国地质大学（北京） | Emergency rescue drilling is along with boring water shutoff device |
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
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| CN2732989Y (en) * | 2004-09-16 | 2005-10-12 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Down-hole by-pass valve type lost circulation material running tool used in oil field |
| CN2811554Y (en) * | 2005-02-07 | 2006-08-30 | 杜晓瑞 | Negative pressure well drilling snubbing tripping device |
| US20080272931A1 (en) * | 2007-05-04 | 2008-11-06 | Francois Auzerais | Method and Apparatus for Measuring a Parameter within the Well with a Plug |
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2010
- 2010-06-30 CN CN 201010212911 patent/CN101864924A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2732989Y (en) * | 2004-09-16 | 2005-10-12 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Down-hole by-pass valve type lost circulation material running tool used in oil field |
| CN2811554Y (en) * | 2005-02-07 | 2006-08-30 | 杜晓瑞 | Negative pressure well drilling snubbing tripping device |
| US20080272931A1 (en) * | 2007-05-04 | 2008-11-06 | Francois Auzerais | Method and Apparatus for Measuring a Parameter within the Well with a Plug |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351603A (en) * | 2016-08-24 | 2017-01-25 | 中国石油集团渤海钻探工程有限公司 | Crack or cave serious leakage plugging method and plugging material feeding pipe string |
| CN106351603B (en) * | 2016-08-24 | 2018-11-20 | 中国石油集团渤海钻探工程有限公司 | A kind of crack or solution cavity severe leakage blocking method and plugging material are sent into pipe string |
| CN112004986A (en) * | 2018-02-14 | 2020-11-27 | 沙特阿拉伯石油公司 | Repairing lost circulation zones in wellbores |
| CN108505968A (en) * | 2018-05-10 | 2018-09-07 | 中国地质大学（武汉） | A kind of site-directed quantitative slurry casting machine and system |
| CN109989726A (en) * | 2018-11-22 | 2019-07-09 | 上海中煤物探测量有限公司 | Cellular-type underground, which pinpoints syringe and its applies, is repairing the method in water supply well |
| CN109989726B (en) * | 2018-11-22 | 2024-06-11 | 中煤地质集团有限公司 | Divided downhole fixed-point injector and method for repairing water supply pipe well by using same |
| CN109944582A (en) * | 2018-12-29 | 2019-06-28 | 贵州省地质矿产勘查开发局一一五地质大队 | Method for analyzing position of stratum containing fractures in shaft |
| CN112983341A (en) * | 2019-12-13 | 2021-06-18 | 中国石油天然气股份有限公司 | Leakage stopping device and leakage stopping method |
| CN113818800A (en) * | 2021-10-20 | 2021-12-21 | 中国地质大学（北京） | Emergency rescue drilling is along with boring water shutoff device |
| CN113818800B (en) * | 2021-10-20 | 2022-06-07 | 中国地质大学（北京） | Emergency rescue drilling is along with boring water shutoff device |
| CN117468888A (en) * | 2023-12-27 | 2024-01-30 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
| CN117468888B (en) * | 2023-12-27 | 2024-03-19 | 中国石油集团川庆钻探工程有限公司 | Underground airtight plugging tool and plugging method |
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Application publication date: 20101020 |