CN104060941B - A kind of implanted slim-hole continuous pipe boring method - Google Patents
A kind of implanted slim-hole continuous pipe boring method Download PDFInfo
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- CN104060941B CN104060941B CN201410273685.7A CN201410273685A CN104060941B CN 104060941 B CN104060941 B CN 104060941B CN 201410273685 A CN201410273685 A CN 201410273685A CN 104060941 B CN104060941 B CN 104060941B
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Abstract
The invention belongs to oil gas field continuous pipe drilling technology field, concrete provide a kind of implanted slim-hole continuous pipe boring method, comprise the following steps: 1) spud in for the first time, complete after drilling well one opens, in well under enter conventional big footpath casing cementing；2) well head blowout preventer set is installed on well head；3) second time is spudded in, and creeps into predetermined well depth, takes out drill bit；4) under the bottom inside of big footpath sleeve pipe, packoff nipple is entered；5) on well head install hanging pup joint, in well under enter path sleeve pipe so that the bottom of path sleeve pipe is positioned at packoff nipple inwall gluing, sealing, and the upper suspension of path sleeve pipe is on hanging pup joint；6) enter pipe continuously under in path sleeve pipe, carry out continuous pipe wellbore test；7), after pipe wellbore test completes continuously, use lifting sub that path sleeve pipe is tripped out well head.This invention improves drilling fluid annular space and returns speed, it is to avoid sand setting bit freezing；After pipe wellbore test completes continuously, path sleeve pipe can trip out from well head, recycling, cost-effective.
Description
Technical field
The invention belongs to oil gas field continuous pipe drilling technology field, be specifically related to a kind of implanted slim-hole continuous pipe boring method.
Background technology
Pipe drilling well is a drilling well new technique of development in recent years continuously, along with the further investigation of this technology, the most gradually applies and is being drilled well, well workover field.Under the conditions of current conventional drilling, continuous boring method is as shown in Figure 1, continuously during pipe drilling well, drilling fluid injects from continuous pipe from top to bottom, upwards return out at drill bit, return in the sleeve pipe of existing big footpath, owing to the internal diameter of big footpath sleeve pipe is relatively big, causes the annular space of drilling fluid to return prompt drop low, be easily formed sand setting lock of tool drilling herein.
It addition, combine the own characteristic of continuous pipe drilling well in prior art, for conclusion, it is primarily present problems with:
1, drilling fluid displacement is low, and it is low that conventional drilling upper annulus returns speed, easily causes sand setting lock of tool drilling, thus the onsite application that have impact on continuous pipe drilling well is promoted；
2, pipe drilling well can only operation in the slim-hole of full well section the most continuously.
Summary of the invention
It is an object of the invention to overcome existing continuous pipe drilling well upper annulus to return speed low, the problem easily causing sand setting lock of tool drilling.
To this end, the invention provides a kind of implanted slim-hole continuous pipe boring method, comprise the following steps:
1) spud in for the first time, complete after drilling well one opens, in well under enter conventional big footpath casing cementing；
2) well head blowout preventer set is installed on well head；
3) second time is spudded in, and creeps into predetermined well depth, takes out drill bit；
4) under the bottom inside of big footpath sleeve pipe, packoff nipple is entered；
5) on well head install hanging pup joint, in well under enter path sleeve pipe so that the bottom of path sleeve pipe is positioned at packoff nipple inwall gluing, sealing, and the upper suspension of path sleeve pipe is on hanging pup joint；
6) enter pipe continuously under in path sleeve pipe, carry out continuous pipe wellbore test；
7), after pipe wellbore test completes continuously, use lifting sub that path sleeve pipe is tripped out well head.
When the quantity of above-mentioned path sleeve pipe is two or more, connected by Telescopic short piece between path sleeve pipe.
Above-mentioned path sleeve pipe is connected with packoff nipple inwall by safety joint.
The internal diameter of above-mentioned big footpath sleeve pipe is 244.5mm.
The internal diameter of above-mentioned path sleeve pipe is 139.7mm.
The internal diameter of above-mentioned lifting sub is 139.7mm.
The invention has the beneficial effects as follows and provide a kind of implanted slim-hole continuous pipe boring method, by entering path sleeve pipe, fixing under in top hole, form integration slim-hole, it is ensured that the annular space of drilling fluid returns speed more than safety value, eliminates the risk of sand setting bit freezing；It addition, after continuous pipe wellbore test completes, implanted slim-hole path sleeve pipe can trip out from well head, recycling, cost-effective.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the continuous pipe drilling well schematic diagram under the conditions of conventional drilling.
Fig. 2 is the implanted slim-hole continuous pipe drilling well schematic diagram of the present invention.
Description of reference numerals: 1, drill bit；2, well；3, big footpath sleeve pipe；4, manage continuously；5, path sleeve pipe；6, packoff nipple；7, safety joint；8, hanging pup joint；9, Telescopic short piece.
Detailed description of the invention
Embodiment 1:
In order to overcome in existing conventional drilling method due to top hole internal diameter make greatly the annular space of drilling fluid return speed low, the problem easily causing sand setting lock of tool drilling, as in figure 2 it is shown, the invention provides a kind of implanted slim-hole continuous pipe boring method, comprise the following steps:
1) spud in for the first time, complete after drilling well one opens, in well 2 under enter conventional big footpath sleeve pipe 3 and cement the well；
2) well head blowout preventer set is installed on well head；
3) second time is spudded in, and creeps into predetermined well depth, takes out drill bit 1；
4) under the bottom inside of big footpath sleeve pipe 3, packoff nipple 6 is entered；
5) on well head install hanging pup joint 8, in well 2 under enter path sleeve pipe 5 so that the bottom of path sleeve pipe 5 is positioned at packoff nipple 6 inwall gluing, sealing, and the upper suspension of path sleeve pipe 5 is on hanging pup joint 8；
6) enter continuous pipe 4 under in path sleeve pipe 5, carry out continuous pipe wellbore test；
7), after pipe wellbore test completes continuously, use lifting sub that path sleeve pipe 5 is tripped out well head.
Wherein, owing to the length of path sleeve pipe 5 is certain, when well depth is more than the length of path sleeve pipe 5, need to connect two or more path sleeve pipe 5, connected by Telescopic short piece 9 between path sleeve pipe 5, meanwhile, the degree of depth of well is not necessarily the integral multiple of path sleeve pipe 5, and the length of Telescopic short piece 9 also can make up the difference between path sleeve pipe 5 and well depth.
And for the ease of the installation of blowout preventer set, the top of described big footpath sleeve pipe 3 has been threaded connection double male joint and end flange, end flange is connected with the upper flange installed on preventer；It addition, in order to path sleeve pipe 5 is played a protective role, be connected between described path sleeve pipe 5 and packoff nipple 6 and have safety joint 7.
This implanted slim-hole continuous pipe boring method, by entering path sleeve pipe 5, fixing under in top hole 2, forms integration slim-hole, it is ensured that the annular space of drilling fluid returns speed more than safety value, eliminates the risk of sand setting bit freezing；It addition, after continuous pipe wellbore test completes, implanted slim-hole path sleeve pipe can trip out from well head, recycling, cost-effective.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a concrete implanted slim-hole continuous pipe boring method, comprise the following steps: 1) spud in for the first time, complete after drilling well one opens, in well 2 under enter the big footpath sleeve pipe 3 that internal diameter is 244.5mm and cement the well；2) installing well head latus rectum on well head is 230mm, the single ram type perventer group of pressure-bearing 23MPa；3) spud in by 118mm drill bit 1 second time, creep into predetermined well depth, take out drill bit 1；4) under the bottom inside of the big footpath sleeve pipe 3 that internal diameter is 244.5mm, packoff nipple 6 is entered；5) on well head install hanging pup joint 8, in well 2 under enter the path sleeve pipe 5 that internal diameter is 139.7mm so that the bottom of path sleeve pipe 5 is positioned at packoff nipple 6 inwall gluing, sealing, and the upper suspension of path sleeve pipe 5 is on hanging pup joint 8；6) enter, under in the path sleeve pipe 5 that internal diameter is 139.7mm, the continuous pipe 4 that internal diameter is 73mm, carry out continuous pipe wellbore test；Continuously during pipe wellbore test, drilling fluid from internal diameter be 73mm continuous pipe 4 inject from top to bottom, upwards return out at drill bit 1, having packoff nipple 6 to seal between well 2 top is due to the big footpath sleeve pipe 3 of the path sleeve pipe 5 and 244.5mm of 139.7mm, drilling fluid can only be returned out by the path sleeve pipe 5 of 139.7mm；7), after pipe wellbore test completes continuously, the path sleeve pipe 5 that internal diameter is 139.7mm is tripped out well head by the lifting sub using internal diameter to be 139.7mm.
It is as shown in table 1 that the annular space of drilling fluid is returned speed testing result by the implanted slim-hole continuous pipe method using pipe boring method and the present embodiment continuously under the conditions of conventional drilling.
Table 1
| Discharge capacity (l/s) | Speed (m/s) is returned in the sleeve pipe of 244.5mm big footpath | Speed (m/s) is returned in 139.7mm path sleeve pipe |
| 6 | 0.14 | 0.76 |
| 7 | 0.16 | 0.88 |
| 8 | 0.19 | 1.01 |
| 9 | 0.21 | 1.14 |
| 10 | 0.23 | 1.26 |
| 11 | 0.26 | 1.39 |
| 12 | 0.28 | 1.52 |
As can be seen from Table 2, discharge capacity one timing when drilling fluid, well increases the annular space after a 139.7mm path sleeve pipe 5 return the conventional annular space of pipe drilling well 244.5mm big footpath sleeve pipe 3 continuously of speed ratio and return speed and be greatly improved, which eliminate the risk of sand setting bit freezing.
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.
Claims (1)
1. an implanted slim-hole continuous pipe boring method, it is characterised in that: comprise the following steps:
1) spud in for the first time, complete after drilling well one opens, in well (2) under enter conventional big footpath sleeve pipe (3) well cementation；
2) well head blowout preventer set is installed on well head；
3) second time is spudded in, and creeps into predetermined well depth, takes out drill bit (1)；
4) under the bottom inside in big footpath sleeve pipe (3), packoff nipple (6) is entered；
5) hanging pup joint (8) is installed on well head, path sleeve pipe (5) is entered under in well (2), the bottom making path sleeve pipe (5) is positioned at packoff nipple (6) inwall gluing, sealing, and the upper suspension of path sleeve pipe (5) is on hanging pup joint (8)；
6) enter pipe (4) continuously under in path sleeve pipe (5), carry out continuous pipe wellbore test；
7), after pipe wellbore test completes continuously, use lifting sub that path sleeve pipe (5) is tripped out well head；
When the quantity of described path sleeve pipe (5) is two or more, connected by Telescopic short piece (9) between path sleeve pipe (5)；
Described path sleeve pipe (5) is connected with packoff nipple (6) inwall by safety joint (7)；
The internal diameter of described big footpath sleeve pipe (3) is 244.5mm；
The internal diameter of described path sleeve pipe (5) is 139.7mm；
The internal diameter of described lifting sub is 139.7mm；
By entering path sleeve pipe, fixing under in top hole, form integration slim-hole, it is ensured that the annular space of drilling fluid returns speed more than safety value, eliminates the risk of sand setting bit freezing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273685.7A CN104060941B (en) | 2014-06-19 | 2014-06-19 | A kind of implanted slim-hole continuous pipe boring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410273685.7A CN104060941B (en) | 2014-06-19 | 2014-06-19 | A kind of implanted slim-hole continuous pipe boring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104060941A CN104060941A (en) | 2014-09-24 |
| CN104060941B true CN104060941B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410273685.7A Expired - Fee Related CN104060941B (en) | 2014-06-19 | 2014-06-19 | A kind of implanted slim-hole continuous pipe boring method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2320841C1 (en) * | 2006-07-11 | 2008-03-27 | Алексей Дмитриевич Башкатов | Well drilling method |
| CN103670271A (en) * | 2013-12-30 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Dual-cycle relay coal bed well drilling method |
| CN103711457A (en) * | 2012-09-29 | 2014-04-09 | 中国石油化工股份有限公司 | Design method of six-spud-in wellbore structure |
| CN103711473A (en) * | 2013-12-30 | 2014-04-09 | 中国石油集团渤海钻探工程有限公司 | Double-circulation relay type method for drilling and completing coal seam composite well |
-
2014
- 2014-06-19 CN CN201410273685.7A patent/CN104060941B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2320841C1 (en) * | 2006-07-11 | 2008-03-27 | Алексей Дмитриевич Башкатов | Well drilling method |
| CN103711457A (en) * | 2012-09-29 | 2014-04-09 | 中国石油化工股份有限公司 | Design method of six-spud-in wellbore structure |
| CN103670271A (en) * | 2013-12-30 | 2014-03-26 | 中国石油集团渤海钻探工程有限公司 | Dual-cycle relay coal bed well drilling method |
| CN103711473A (en) * | 2013-12-30 | 2014-04-09 | 中国石油集团渤海钻探工程有限公司 | Double-circulation relay type method for drilling and completing coal seam composite well |
Non-Patent Citations (1)
| Title |
|---|
| 注气欠平衡钻水平井的新技术;刘绘新等;《石油勘探与开发》;20050228;第32卷(第1期);100-102 * |
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| CN104060941A (en) | 2014-09-24 |
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