CN103306602A - Hydraulic-expansion recyclable whipstock for directional drilling of underground coal mine and operation method thereof - Google Patents
Hydraulic-expansion recyclable whipstock for directional drilling of underground coal mine and operation method thereof Download PDFInfo
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- CN103306602A CN103306602A CN201310272951XA CN201310272951A CN103306602A CN 103306602 A CN103306602 A CN 103306602A CN 201310272951X A CN201310272951X A CN 201310272951XA CN 201310272951 A CN201310272951 A CN 201310272951A CN 103306602 A CN103306602 A CN 103306602A
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- whipstock
- decapsulator
- packing element
- way valve
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Abstract
The invention provides a hydraulic-expansion recyclable whipstock for directional drilling of an underground coal mine. The hydraulic-expansion recyclable whipstock comprises a setting device, a setting head 7 and an unsetting device 8, wherein the setting device comprises a guide head 1, a rubber sleeve assembly 2, an inner supporting tube 3, a joint 4, a one-way valve assembly 5 and wedged iron 6. Two ends of the rubber sleeve assembly 2 are fixedly connected with the guide head 1 and the joint 4 respectively, and two ends of the inner part of the joint 4 are fixedly connected with the inner supporting tube 3 and the one-way valve assembly 5 respectively. When the whipstock sets, a drill rod is connected with the whipstock through the setting head 7, high-pressure water is poured into the rubber sleeve assembly 2, a rubber sleeve is expanded to adjoin the hole wall of a drill hole, and finally setting is realized. During fishing, after the unsetting device 8 enters a fishing hole of the wedged iron 6, a jack prop 9 opens the valve core of the one-way valve assembly 5; and meanwhile, a spring clamp 10 in the unsetting device 8 is bounced off, a drilling tool is lifted up, and finally the whipstock can be fished out. The whipstock has the advantages of simple structure and low processing cost, can accurately control the opening direction of a branch pore, and increases the pore forming speed and quality of the branch pore.
Description
Technical field
The present invention relates to directional drilling instrument under the coal mine, particularly Multilateral Wells hydraulic expansion Recoverable whipstock and method of operating thereof are opened in directional drilling under a kind of coal mine.
Background technology
Recoverable whipstock uses in oil, geological prospecting and exploitation and is of long duration, and its scope of application comprises that sidetracking opens many technological measures such as branch, and technology is comparative maturity also.But coal mine gas extraction directional drilling construction is not also used the precedent of whipstock, and oil, geological prospecting drilling well and coal mine gas extraction borehole construction technology and working environment difference are larger: oil, geological prospecting borehole aperture are generally large than the coal mine gas extraction borehole, requirement under its supporting inapplicable coal mine of whipstock specification; In addition, oil, the many sleeve pipes that cooperate in vertical shaft of used for geological prospecting whipstock use, and the nearly horizontal orientation boring under the coal mine can not be satisfied its service condition.
Along with improving constantly of nearly horizontal long borehole Technology of Directional Drilling level under the coal mine, this technology is applied rapidly, but this technology is pushed up under coal mine, during construction of bottom plates, because stratum hardness is higher, the simple difficulty that relies on helicoid hydraulic motor self deflecting ability to open branched hole is larger, therefore need a kind of minor diameter, open hole well Recoverable whipstock that is applicable to directional drilling under the coal mine of exploitation badly, improve branched hole speed of fulfiling hole and quality.
Summary of the invention
The object of the present invention is to provide directional drilling hydraulic expansion Recoverable whipstock and method of operating thereof under a kind of coal mine, solve existing whipstock in the circumscribed problem of colliery down-hole application.
For achieving the above object, the technical solution adopted in the present invention is:
Directional drilling hydraulic expansion Recoverable whipstock under a kind of coal mine comprises set packer, sets 7, decapsulator 8 three parts that described set packer comprises top guide 1, packing element assembly 2, inner support pipe 3, joint 4, one way valve assembly 5, wedge 6.Wherein, packing element assembly 2 two ends are affixed with top guide 1, joint 4 respectively, and joint 4 inner two ends are affixed with inner support pipe 3, one way valve assembly 5 respectively again, and top guide 1, packing element assembly 2, joint 4 and one way valve assembly 5 form a sealed volume.
Wherein, describedly set 7 a diameter is radially arranged is the aperture of 2mm, be used for discharging the drilling rod inner air.
Wherein, described to set 7 ends that connect described whipstock be left hand thread, and the other end is right-handed thread.
Wherein, described decapsulator 8 front ends have fore-set 9, and two bullet cards 10 are equipped with in the bottom, cooperate with the stepped hole of the wedge 6 of setting device and realize fishing.
Wherein, there is inner support pipe 3 described set packer packing element assembly 2 inside, play the guiding role during lower brill, prevent the 2 elasticity position bendings of packing element assembly, and packing element assembly 2 shrinks the position vertically during expansion.
Wherein, described fore-set 9 is step, and fore-set 9 is detachable the connection with the connected mode of decapsulator 8.
Wherein, the overall length of described whipstock is in 3m.
The present invention discloses the method for operating of directional drilling usefulness hydraulic expansion Recoverable whipstock under a kind of coal mine, may further comprise the steps:
(1) set, drilling rod is connected with whipstock by setting 7, and water under high pressure injects in the whipstock packing element assembly 2, and packing element expands under the effect of water under high pressure, is adjacent to borehole wall, realizes setting;
(2) reclaim and to set head, set finish after, forward revolution drilling rod, drilling rod and set 7 with whipstock between left hand thread is connected and separates, carry brill, then set 7 outside drilling rod is suggested the hole, then preparation is carried out sidetracking and is opened branched hole work;
(3) open branched hole, wedge 6 is affixed with the upper end of joint 4, and after setting, the inclined-plane of wedge 6 just plays the effect of supporting and applying lateral force to drill bit, realizes opening smoothly the purpose of branched hole;
(4) reclaim whipstock, decapsulator 8 is contained in drilling rod foremost, in the hole, be lowered to decapsulator 8, decapsulator 8 can enter in the stepped hole of wedge 6 under the guide effect of fore-set 9 smoothly, and the spool of one way valve assembly 5 backed down, release the water under high pressure of packing element inside, simultaneously two bullet cards 10 in the decapsulator 8 flick, on carry drilling rod and propose whipstock.
Directional drilling with the operating principle of hydraulic expansion Recoverable whipstock is under the coal mine of the present invention:
In the process that sets, owing to being full of air in the drilling rod that is threaded, if directly drive slush pump to whipstock pump water, be certain to be full of by air in the whipstock packing element assembly 2, although internal pressure reaches setting pressure (6MPa), but the performance of one way valve assembly 5 sealing airs is limited, in case the internal high pressure air leakage will cause setting inefficacy.For this reason, design exhaust plant and set accordingly method, concrete measure is: setting the circular hole (such as Fig. 2) of a diameter 2mm of 7 brills, and before going into the well, whipstock will fill with water in the whipstock packing element assembly 2, when beginning to suppress to whipstock, the mud pump delivery is transferred to minimum, low discharge carries out pump water, then the air in the drilling rod is discharged through a circular hole that sets on 7, when the pump pressure of finding slush pump raises suddenly, illustrate that water has arrived near the one way valve assembly 5 of whipstock, be transferred to normal discharge (about 200L/min) operation with the slush pump flow this moment, swell increment reaches and sets requirement under the effect of whipstock packing element assembly 2 in inside water pressure when pressure reaches setting pressure (6MPa), finishes setting.
After the application whipstock realizes that the near-horizontal hole main aperture is opened branched hole, in the hole, be lowered to decapsulator 8, when decapsulator 8 will soon be descended the precalculated position that whipstock sets, note observing the feed pressure oil meter of rig, when finding that feed pressure raises suddenly, in the time of can not continuing lower brill, illustrate that decapsulator 8 has put in place, this moment, the fore-set 9 of decapsulator 8 backed down one way valve assembly 5 spools, then water under high pressure in the packing element assembly 2 left standstill 20-30 minute through 5 pressure releases of one way valve assembly, treated that packing element assembly 2 slowly is deformed to unswollen state, then packing element assembly 2 separates with hole wall, realizes deblocking; And two bullet cards 10 have also flicked in the decapsulator 8, salvage and have arrived whipstock, handle rig and carry brill, and whipstock is outside drilling rod is suggested the hole.
The schematic design that decapsulator 8 is salvaged is that the spring-gripping type deblocking is salvaged, bullet card 10 does not put in place or bullet card 10 puts in place and fail to realize these two kinds of accidents of deblocking in order to prevent that solution is honored as a queen in the deblocking process, we design the cooperation position of decapsulator 8 with whipstock, guarantee to only have decapsulator 8 front end fore-sets 9 to enter that bullet card 10 just can open after one way valve assembly 5 pilot holes, continue to feed forward, whipstock deblocking then, otherwise bullet card 10 does not put in place and can not open, and does not open bore and not backing down stuck two kinds of accidents that one way valve assembly 5 deblockings cause because bullet card 10 opens fore-set 9 of causing with regard to effectively having avoided in the direction deflecting device fishing process occuring because of the solution bullet card 10 of being honored as a queen like this.
Because the water inlet aperture of one way valve assembly 5 is less, decapsulator 8 fore-set 9 foremost is thinner, in order to strengthen the reliability of decapsulator 8, prevent that decapsulator 8 fore-set 9 in the process of lower brill from fractureing, and in the salvaging process, can play guide effect, fore-set 9 is designed to step, connected mode with fore-set 9 and decapsulator 8 is designed to detachable simultaneously, in case fore-set 9 damages, can directly it be pulled down, only need more renew fore-set 9 and can continue to use.
Beneficial effect
The directional drilling major advantage of hydraulic expansion Recoverable whipstock under the coal mine of the present invention:
Simple in structure, processing cost is low, can solve that directional drilling is difficult for out the difficult problem of branch under the coal mine, and can accurately control branched hole perforate direction, improves branched hole speed of fulfiling hole and quality.
Description of drawings
Fig. 1 is the structural representation of whipstock of the present invention;
Fig. 2 sets a structural representation of 7 among the present invention;
Fig. 3 is the structural representation of decapsulator 8 among the present invention.
Among the figure: 1 is top guide; 2 is the packing element assembly; 3 is the inner support pipe; 4 is joint; 5 is the one way valve assembly; 6 is wedge; 7 for setting head; 8 is decapsulator; 9 is fore-set; 10 is the bullet card.
The specific embodiment
The present invention will be described in detail below in conjunction with accompanying drawing, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
Before setting, with drilling rod, set 7 and whipstock affixed, after whipstock is sent to assigned address, open slush pump, to the packing element assembly 2 interior pumping water under high pressures of whipstock, the expanded radially distortion occurs in packing element assembly 2 under the effect of water under high pressure, fit tightly with hole wall, whipstock is fixedly secured in the hole, realize setting.Set finish after, forward revolution drilling rod, drilling rod and set 7 with whipstock between left hand thread be connected and separate (set 7 with the whipstock link be left hand thread, the other end is right-handed thread), carry brill, then set 7 outside drilling rod is suggested the hole, then prepare to carry out sidetracking and open branched hole work.
In the process that sets, owing to being full of air in the drilling rod that is threaded, if directly drive slush pump to whipstock pump water, be certain to be full of by air in the whipstock packing element assembly 2, although internal pressure reaches setting pressure (6MPa), but the performance of one way valve assembly 5 sealing airs is limited, in case the internal high pressure air leakage will cause setting inefficacy.For this reason, design exhaust plant and set accordingly method, concrete measure is: setting the circular hole (such as Fig. 2) of a diameter 2mm of 7 brills, and before going into the well, whipstock will fill with water in the whipstock packing element assembly 2, when beginning to suppress to whipstock, the mud pump delivery is transferred to minimum, low discharge carries out pump water, then the air in the drilling rod is discharged through a circular hole that sets on 7, when the pump pressure of finding slush pump raises suddenly, illustrate that water has arrived near the one way valve assembly 5 of whipstock, be transferred to normal discharge (about 200L/min) operation with the slush pump flow this moment, swell increment reaches and sets requirement under the effect of whipstock packing element assembly 2 in inside water pressure when pressure reaches setting pressure (6MPa), finishes setting.
After the application whipstock realizes that the near-horizontal hole main aperture is opened branched hole, in the hole, be lowered to decapsulator 8, when decapsulator 8 will soon be descended the precalculated position that whipstock sets, note observing the feed pressure oil meter of rig, when finding that feed pressure raises suddenly, in the time of can not continuing lower brill, illustrate that decapsulator 8 has put in place, this moment, the fore-set 9 of decapsulator 8 backed down one way valve assembly 5 spools, then water under high pressure in the packing element assembly 2 left standstill 20-30 minute through 5 pressure releases of one way valve assembly, treated that packing element assembly 2 slowly is deformed to unswollen state, then packing element assembly 2 separates with hole wall, realizes deblocking; And two bullet cards 10 have also flicked in the decapsulator 8, salvage and have arrived whipstock, handle rig and carry brill, and whipstock is outside drilling rod is suggested the hole.
Because the underworkings steric requirements is limited, in order to strengthen the applicability of whipstock, the overall dimension of whipstock should limit to some extent, and the overall length of whipstock is controlled in the 3m the most at last, and is suitable with the length of downhole tool.
The schematic design that decapsulator 8 is salvaged is that the spring-gripping type deblocking is salvaged, bullet card 10 does not put in place or bullet card 10 puts in place and fail to realize these two kinds of accidents of deblocking in order to prevent that solution is honored as a queen in the deblocking process, we design the cooperation position of decapsulator 8 with whipstock, guarantee to only have decapsulator 8 front end fore-sets 9 to enter that bullet card 10 just can open after one way valve assembly 5 pilot holes, continue to feed forward, whipstock deblocking then, otherwise bullet card 10 does not put in place and can not open, and does not open bore and not backing down stuck two kinds of accidents that one way valve assembly 5 deblockings cause because bullet card 10 opens fore-set 9 of causing with regard to effectively having avoided in the direction deflecting device fishing process occuring because of the solution bullet card 10 of being honored as a queen like this.
Because the water inlet aperture of one way valve assembly 5 is less, decapsulator 8 fore-set 9 foremost is thinner, in order to strengthen the reliability of decapsulator 8, prevent that decapsulator 8 fore-set 9 in the process of lower brill from fractureing, and in the salvaging process, can play guide effect, fore-set 9 is designed to step, connected mode with fore-set 9 and decapsulator 8 is designed to detachable simultaneously, in case fore-set 9 damages, can directly it be pulled down, only need more renew fore-set 9 and can continue to use.
It should be noted that at last: obviously, above-described embodiment only is for example of the present invention clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among protection scope of the present invention.
Claims (8)
1. directional drilling hydraulic expansion Recoverable whipstock under the coal mine, it is characterized in that: comprise set packer, set head (7), decapsulator (8) three parts, described set packer comprises top guide (1), packing element assembly (2), inner support pipe (3), joint (4), one way valve assembly (5), wedge (6), packing element assembly (2) two ends respectively with top guide (1), joint (4) is affixed, the inner two ends of joint (4) again respectively with inner support pipe (3), one way valve assembly (5) is affixed, top guide (1), packing element assembly (2), joint (4) and one way valve assembly (5) form a sealed volume.
2. whipstock according to claim 1 is characterized in that: describedly set head (7) diameter is radially arranged is the aperture of 2mm.
3. whipstock according to claim 1 is characterized in that: described to set the end that head (7) connects described whipstock be left hand thread, and the other end is right-handed thread.
4. whipstock according to claim 1, it is characterized in that: described decapsulator (8) front end has fore-set (9), and two bullet cards (10) are equipped with in the bottom, cooperates with the stepped hole of wedge in the whipstock (6) to realize fishing.
5. whipstock according to claim 1, it is characterized in that: there is inner support pipe (3) described set packer packing element assembly (2) inside, can play the guiding role during lower brill, prevent packing element assembly (2) elasticity position bending, can allow again packing element assembly (2) shrink the position vertically during expansion.
6. whipstock according to claim 1 is characterized in that: described fore-set (9) is step, and fore-set (9) is detachable the connection with the connected mode of decapsulator (8).
7. whipstock according to claim 1, it is characterized in that: the overall length of described whipstock is in 3m.
8. the method for operating of any described whipstock of claim 1-7 is characterized in that, may further comprise the steps:
Step 1 sets, and drilling rod is connected with whipstock by setting head (7), and water under high pressure injects in the whipstock packing element assembly (2), and packing element expands under the effect of water under high pressure, is adjacent to borehole wall, realizes setting;
Step 2 reclaims and to set head, set finish after, forward revolution drilling rod, drilling rod and set head (7) and is connected with left hand thread between the whipstock and separates is carried brill, then sets head (7) outside drilling rod is suggested the hole, then preparation is carried out sidetracking and is opened branched hole work;
Step 3 is opened branched hole, and wedge (6) is affixed with the upper end of joint (4), and after setting, the inclined-plane of wedge (6) just plays the effect of supporting and applying lateral force to drill bit, realizes opening smoothly the purpose of branched hole;
Step 4 reclaims whipstock, decapsulator (8) is contained in drilling rod foremost, in the hole, be lowered to decapsulator (8), decapsulator (8) can enter in the stepped hole of wedge (6) under the guide effect of fore-set (9) smoothly, and the spool of one way valve assembly (5) backed down, release the water under high pressure of packing element inside, simultaneously two the bullet cards (10) in the decapsulator (8) flick, on carry drilling rod and propose whipstock.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310272951.XA CN103306602B (en) | 2013-07-02 | 2013-07-02 | Hydraulic-expansion recyclable whipstock for directional drilling of underground coal mine and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310272951.XA CN103306602B (en) | 2013-07-02 | 2013-07-02 | Hydraulic-expansion recyclable whipstock for directional drilling of underground coal mine and operation method thereof |
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| CN103306602A true CN103306602A (en) | 2013-09-18 |
| CN103306602B CN103306602B (en) | 2015-04-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162642A (en) * | 2018-09-19 | 2019-01-08 | 中国地质科学院勘探技术研究所 | A kind of power guid casing pipe running device for soft stratum deflecting hole section |
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| CN2866787Y (en) * | 2005-11-10 | 2007-02-07 | 新疆石油管理局钻井工艺研究院 | Whipstock spring block type positioning device |
| CN101315024A (en) * | 2008-07-09 | 2008-12-03 | 中国地质大学（武汉） | Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| CN202117620U (en) * | 2011-06-19 | 2012-01-18 | 周春雷 | Grouting hole-packer |
| CN202391345U (en) * | 2011-11-25 | 2012-08-22 | 潍坊市宇宏石油机械有限公司 | Recyclable well drilling and well completion whipstock for oil drilling |
| CN202970472U (en) * | 2012-10-31 | 2013-06-05 | 中国石油集团川庆钻探工程有限公司 | Expansion pipe locating whipstock |
| CN203334957U (en) * | 2013-07-02 | 2013-12-11 | 中煤科工集团西安研究院 | Waterpower expansion recyclable whipstock for underground coal mine directional drilling |
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2013
- 2013-07-02 CN CN201310272951.XA patent/CN103306602B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5443128A (en) * | 1992-12-14 | 1995-08-22 | Institut Francais Du Petrole | Device for remote actuating equipment comprising delay means |
| CN2866787Y (en) * | 2005-11-10 | 2007-02-07 | 新疆石油管理局钻井工艺研究院 | Whipstock spring block type positioning device |
| CN101315024A (en) * | 2008-07-09 | 2008-12-03 | 中国地质大学（武汉） | Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| CN202117620U (en) * | 2011-06-19 | 2012-01-18 | 周春雷 | Grouting hole-packer |
| CN202391345U (en) * | 2011-11-25 | 2012-08-22 | 潍坊市宇宏石油机械有限公司 | Recyclable well drilling and well completion whipstock for oil drilling |
| CN202970472U (en) * | 2012-10-31 | 2013-06-05 | 中国石油集团川庆钻探工程有限公司 | Expansion pipe locating whipstock |
| CN203334957U (en) * | 2013-07-02 | 2013-12-11 | 中煤科工集团西安研究院 | Waterpower expansion recyclable whipstock for underground coal mine directional drilling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162642A (en) * | 2018-09-19 | 2019-01-08 | 中国地质科学院勘探技术研究所 | A kind of power guid casing pipe running device for soft stratum deflecting hole section |
| CN109162642B (en) * | 2018-09-19 | 2024-04-16 | 中国地质科学院勘探技术研究所 | Power guiding casing pipe running device for inclined hole section of weak stratum |
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| CN103306602B (en) | 2015-04-29 |
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