CN103867149A - Circulation method of coal bed gas multi-branch horizontal well drilling media - Google Patents
Circulation method of coal bed gas multi-branch horizontal well drilling media Download PDFInfo
- Publication number
- CN103867149A CN103867149A CN201310408981.9A CN201310408981A CN103867149A CN 103867149 A CN103867149 A CN 103867149A CN 201310408981 A CN201310408981 A CN 201310408981A CN 103867149 A CN103867149 A CN 103867149A
- Authority
- CN
- China
- Prior art keywords
- branch
- circulation
- drilling
- mud
- clear water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 47
- 239000003245 coal Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 239000012267 brine Substances 0.000 claims abstract description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 230000010349 pulsation Effects 0.000 claims description 19
- 239000004575 stone Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 238000007616 round robin method Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 abstract 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a circulation method of coal bed gas multi-branch horizontal well drilling media, and belongs to the technical field of coal bed gas development. Two slurry tanks on the ground are used for being combined into two sets of ground circulation systems through a valve, a slurry pump group and a pipeline, the two sets of ground circulation systems can alternately carry out well tube drilling medium circulation, one set of circulation media is slurry consisting of bentonite and other additives, the other set of circulation media is clean water or solid-free brine prepared by other inorganic salts, during the drilling of a main branch and sub branches at the mudstone, slurry circulation is used, and after the branches and the collateral branches enter a coal bed, clean water or solid-free brine circulation is used for drilling. The two sets of ground circulation systems are used in turns through the valve, and one circulation system can be selected at any time to be used for drilling medium circulation on a well tube. The method has the advantages that the drilling medium circulation can be freely carried out on the well tube, the problem of multi-time alternate conversion of two kinds of drilling media including slurry and clean water in the drilling construction process of the coal bed gas multi-branch horizontal well can be solved, and the coal bed gas exploitation benefits are improved.
Description
Technical field
The present invention relates to CBM Drilling technology, especially relate to a kind of round-robin method of coal bed gas multi-branch horizontal drilling medium, belong to cbm development technical field.
Background technology
At present, the multi-branched horizontal well in China's cbm development, its master props up, branch all creeps in coal seam, and because China is mostly high-order coal seam, the coal seam problem of collapsing has restricted the gas production of multi-branched horizontal well.The coal seam complexity that causes the accident that easily collapses in drilling process, in later stage mining process, collapse in coal seam, causes gas production passage to stop up, and coal bed gas cannot effectively be discharged.At present, there is a kind of coal bed gas multi-branch horizontal in scene, and this multi-branched horizontal well master props up with the cave of two mouthfuls of cave wells all at stable roof or base plate, the problem thereby collapse in the cave that efficiently solves a main well and cave well.But this multi-branched horizontal well is in work progress, be the large rock-carrying ability that improves drilling medium, its main and son field in mud stone need to be with the mud that contains swell soil and other additive composition as drilling fluids; And be to reduce the pollution of drilling fluid to coal seam, the son field in coal seam and when all the pulsation in coal seam creeps into, must use clear water as drilling fluid.Therefore,, in wellbore construction process, mud, two kinds of drilling mediums of clear water need to repeatedly replace conversion, cause rolling up of workload.
Summary of the invention
The object of this invention is to provide a kind of round-robin method of coal bed gas multi-branch horizontal drilling medium, solve the coal bed gas multi-branch horizontal problem that mud, two kinds of drilling mediums of clear water are repeatedly alternately changed in wellbore construction process, reduce the pollution of circulatory mediator to coal seam, realize coal bed gas high-efficiency mining.
The object of the invention is to realize by following proposal: a kind of round-robin method of coal bed gas multi-branch horizontal drilling medium, it is characterized in that: utilize two, ground slurry tank to pass through valve, mud pump set, pipeline is combined into the two cover ground circulating systems, the pit shaft drilling medium circulation that can hocket of the two cover ground circulating systems, a set of circulatory mediator is the mud that contains swell soil and other additive composition, another set of circulatory mediator is clear water or the solid free brine that is made into other inorganic salts, main, branch is in the time that mud stone creeps into, use mud circulation, branch, pulsation enters behind coal seam, drilling well is used clear water or solid free brine circulation.
A round-robin method for coal bed gas multi-branch horizontal drilling medium, is characterized in that: the two cover ground circulating systems are switched by valve, can select at any time a certain circulating system to carry out drilling medium circulation to pit shaft.
A round-robin method for coal bed gas multi-branch horizontal drilling medium, is characterized in that, comprises the steps:
(1) comprehensive check valve, pipeline, guarantee that valve is intact, and circuit is unimpeded;
(2) utilize valve to switch, that carries out with drilling fluid that mud stone master props up creeps into, and main all in mud stone;
(3) after main having propped up, first branch of sidetracking, carry out creeping into of branch with mud circulating system, termination of pumping after coal is seen by branch, close mud circulating system, open the clear water circulating system, utilize the clear water circulating system, carry out creeping into of branch and pulsation, until the pulsation of first branch and this branch completes;
(4) close clear water cyclic system gate, open mud circulating system gate, to injecting sidetracking that mud carries out next branch in pit shaft, creeping into, after seeing coal, close mud circulating system, open the clear water circulating system, carry out creeping into of branch and pulsation with clear water, until all branches and pulsation all complete the work of creeping into;
(5) after all branches and pulsation complete, drilling tool is carried to main borehole, closed mud circulating system, open the clear water circulating system, lead a well and clean to pumping into clear water in main borehole.
Effect of the present invention is: the present invention utilizes two, ground slurry tank by valve, pipeline, the synthetic two cover ground circulating systems of mud pump set, can carry out drilling medium circulation to pit shaft arbitrarily, thereby solve coal bed gas multi-branch horizontal in wellbore construction process, the problem that mud, two kinds of drilling mediums of clear water are repeatedly alternately changed, reduce the pollution of circulatory mediator to coal seam, improved coal-bed gas exploitation benefit.
Brief description of the drawings
Accompanying drawing is surface technology schematic diagram of the present invention.
In figure: 1. slurry tank; 2. valve; 3. valve; 4. clean water tank; 5. valve; 6.1# slush pump; 7. valve; 8.2# slush pump; 9. valve; 10. valve; 11.3# slush pump; 12. mud pump sets; 13. well heads; 14. valves; 15. valves; 16. valves; 17. valves; 18. valves.
Detailed description of the invention
Below in conjunction with specific embodiment, just the present invention is described further.Accompanying drawing can be used as the surface technology schematic diagram of this enforcement.
Slurry tank (1) is equipped with the mud that contains swell soil and other additive composition, the solid free brine that clean water tank (4) is equipped with clear water or is made into other inorganic salts, in the present embodiment, mud pump set is made up of 3 slush pumps, slurry tank (1), clean water tank (4) passes through valve, pipeline, mud pump set (12) is combined into the two cover ground circulating systems, the pit shaft drilling medium circulation that can hocket of the two cover ground circulating systems, a set of circulatory mediator is the mud that contains swell soil and other additive composition, another set of circulatory mediator is clear water or the solid free brine that is made into other inorganic salts, main, branch, in the time that mud stone creeps into, use mud circulation, and branch, pulsation enter behind coal seam, and drilling well is used clear water or solid free brine circulation.
The two cover ground circulating systems, by switching of valve (2), (3), (5), (17), (18), can select a certain circulating system to carry out drilling medium circulation to pit shaft at any time.Drilling process is divided into three phases: creeping into of mud stone main split carried out with drilling fluid in the first rank; Second stage is carried out creeping into of coal seam branch, pulsation with clear water; Phase III is led the cleaning of a well with drilling fluid.Concrete implementation step is:
First, check valve, pipeline, guarantee that valve is intact comprehensively, and circuit is unimpeded;
Secondly, according to on-the-spot drilling condition, determine slush pump displacement size, select as required 1# slush pump (6), 2# slush pump (8), 3# slush pump (11) or the combination between them, while driving 1# slush pump (6), want corresponding valve (15), the valve (7) opened, while driving 2# slush pump (8), want corresponding valve (9), the valve (14) opened, while driving 3# slush pump (11), want corresponding valve (10), the valve (13) opened.
Again, open valve (2), valve-off (3) and (5), need to select slush pump according to field working conditions, and open corresponding valve, the drilling fluid of slurry tank (1) is pumped into well head (12); Open valve (18), valve-off (17) simultaneously, set up drilling-fluid circulation system, utilize mud stone to lead and the creeping into of branch.
Then,, after coal is seen by branch, first close slush pump, then valve-off (2), opens valve (5), need to select slush pump according to field working conditions, and open corresponding valve, the clear water of clean water tank (4) is pumped into well head (12); Open valve (17), valve-off (18) simultaneously, set up the clear water circulating system, creep into the pulsation that clear water carries out in coal seam branch and branch.
Then, after in a branch and branch, pulsation has bored, repeating step (2) and (3), carry out creeping into of next branch with drilling fluid, this branch sees after coal, and creeping into of coal seam branch and pulsation carried out with clear water in repeating step (2) and (4).
Finally, after all branches and pulsation have bored, drilling tool is carried to mud stone main borehole, repeating step (2) and (4), clean the main Zhi Jinhang of mud stone with clear water, cleans completely, and wellbore construction completes.
Claims (3)
1. the round-robin method of a coal bed gas multi-branch horizontal drilling medium, it is characterized in that: utilize two, ground slurry tank to pass through valve, mud pump set, pipeline is combined into the two cover ground circulating systems, the pit shaft drilling medium circulation that can hocket of the two cover ground circulating systems, a set of circulatory mediator is the mud that contains swell soil and other additive composition, another set of circulatory mediator is clear water or the solid free brine that is made into other inorganic salts, main, branch is in the time that mud stone creeps into, use mud circulation, branch, pulsation enters behind coal seam, drilling well is used clear water or solid free brine circulation.
2. the round-robin method of a kind of coal bed gas multi-branch horizontal drilling medium according to claim 1, is characterized in that: the two cover ground circulating systems are switched by valve, can select at any time a certain circulating system to carry out drilling medium circulation to pit shaft.
3. the round-robin method of a kind of coal bed gas multi-branch horizontal drilling medium according to claim 1, is characterized in that, comprises the steps:
(1) comprehensive check valve, pipeline, guarantee that valve is intact, and circuit is unimpeded;
(2) utilize valve to switch, that carries out with drilling fluid that mud stone master props up creeps into, and main all in mud stone;
(3) after main having propped up, first branch of sidetracking, carry out creeping into of branch with mud circulating system, termination of pumping after coal is seen by branch, close mud circulating system, open the clear water circulating system, utilize the clear water circulating system, carry out creeping into of branch and pulsation, until the pulsation of first branch and this branch completes;
(4) close clear water cyclic system gate, open mud circulating system gate, to injecting sidetracking that mud carries out next branch in pit shaft, creeping into, after seeing coal, close mud circulating system, open the clear water circulating system, carry out creeping into of branch and pulsation with clear water, until all branches and pulsation all complete the work of creeping into;
(5) after all branches and pulsation complete, drilling tool is carried to main borehole, closed mud circulating system, open the clear water circulating system, lead a well and clean to pumping into clear water in main borehole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408981.9A CN103867149A (en) | 2013-09-11 | 2013-09-11 | Circulation method of coal bed gas multi-branch horizontal well drilling media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408981.9A CN103867149A (en) | 2013-09-11 | 2013-09-11 | Circulation method of coal bed gas multi-branch horizontal well drilling media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103867149A true CN103867149A (en) | 2014-06-18 |
Family
ID=50906113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310408981.9A Pending CN103867149A (en) | 2013-09-11 | 2013-09-11 | Circulation method of coal bed gas multi-branch horizontal well drilling media |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103867149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184693A (en) * | 2018-09-06 | 2019-01-11 | 四川盐业地质钻井大队 | The old mining area old well production potential tapping technique of rock salt |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664302A (en) * | 2005-01-13 | 2005-09-07 | 西南石油学院 | A continuous circulation system for oil and gas wells and its application method |
| EP1558831B1 (en) * | 2002-11-06 | 2009-09-09 | Luc De Boer | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| CN101963052A (en) * | 2010-09-10 | 2011-02-02 | 北京奥瑞安能源技术开发有限公司 | Method for cleaning sediment in vertical well pocket in process of coalbed methane exploitation |
| CN102400653A (en) * | 2011-11-09 | 2012-04-04 | 深圳市远东石油钻采工程有限公司 | Continuous circulating system |
| CN102704908A (en) * | 2012-05-14 | 2012-10-03 | 西南石油大学 | Split-flow automatic control system of coal bed methane horizontal branch well and process thereof |
| CN102913160A (en) * | 2012-11-12 | 2013-02-06 | 中国石油集团长城钻探工程有限公司 | Continuous circulation drilling well system |
| CN103615191A (en) * | 2013-12-06 | 2014-03-05 | 中国石油大学(北京) | Pumping-pressure reverse-circulation well drilling method and system |
-
2013
- 2013-09-11 CN CN201310408981.9A patent/CN103867149A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1558831B1 (en) * | 2002-11-06 | 2009-09-09 | Luc De Boer | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| CN1664302A (en) * | 2005-01-13 | 2005-09-07 | 西南石油学院 | A continuous circulation system for oil and gas wells and its application method |
| CN101963052A (en) * | 2010-09-10 | 2011-02-02 | 北京奥瑞安能源技术开发有限公司 | Method for cleaning sediment in vertical well pocket in process of coalbed methane exploitation |
| CN102400653A (en) * | 2011-11-09 | 2012-04-04 | 深圳市远东石油钻采工程有限公司 | Continuous circulating system |
| CN102704908A (en) * | 2012-05-14 | 2012-10-03 | 西南石油大学 | Split-flow automatic control system of coal bed methane horizontal branch well and process thereof |
| CN102913160A (en) * | 2012-11-12 | 2013-02-06 | 中国石油集团长城钻探工程有限公司 | Continuous circulation drilling well system |
| CN103615191A (en) * | 2013-12-06 | 2014-03-05 | 中国石油大学(北京) | Pumping-pressure reverse-circulation well drilling method and system |
Non-Patent Citations (1)
| Title |
|---|
| 王思友等: "家H2分支水平井钻井液技术", 《钻井液与完井液》, vol. 22, 31 May 2005 (2005-05-31), pages 24 - 28 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184693A (en) * | 2018-09-06 | 2019-01-11 | 四川盐业地质钻井大队 | The old mining area old well production potential tapping technique of rock salt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104612647B (en) | Switchable separate stratum fracturing well cementation sliding sleeve and its construction method | |
| CN102787815B (en) | The positive and negative circulation of extra-deep hole drilling castinplace pile combines construction technology | |
| CN105484719A (en) | Method for improving multi-cluster cracking effectiveness by adopting multi-scale soluble ball to seal seam | |
| CN108678722A (en) | A multi-well combined hot dry rock artificial heat storage construction system and construction method | |
| CN104653136B (en) | Method for drilling and grinding composite bridge plug by conventional oil pipe underground power | |
| CN105041241A (en) | Continuous direct cycle sand cleaning-out device for common oil pipes and technological method | |
| CN105178910A (en) | Horizontal well water plugging process pipe column and method | |
| CN104563873B (en) | Underground casing power guiding device | |
| Xiumin et al. | Research and application of gas-lift reverse circulation drilling technology to geothermal well construction in Dalian Jiaoliu Island | |
| CN206071508U (en) | A kind of waterpower screw rod self-loopa sand-bailing equipment | |
| CN104047556A (en) | Method for preventing Chang7 oil shale from collapsing | |
| CN205297337U (en) | Hole reaming and digging device for well drilling | |
| CN102312659A (en) | Pollution-free well workover process for oil field | |
| CN204492724U (en) | bailing device | |
| CN202202832U (en) | Spiral drilling type bailing pump | |
| CN103867149A (en) | Circulation method of coal bed gas multi-branch horizontal well drilling media | |
| CN210033856U (en) | Automatic desilting silt pump and rig | |
| CN202228029U (en) | Sand bailing barrel for oil field downhole operation | |
| CN103790529A (en) | Coalbed methane drainage extraction and backwashing device and method | |
| CN204252864U (en) | A kind of drilling tool | |
| CN204266988U (en) | A kind of pilot-controlled switch sliding sleeve | |
| CN107795297A (en) | Multistage a chain of Cut Block blocking | |
| CN119289537A (en) | A downhole circulating heat extraction system and method | |
| CN111827946B (en) | Naked fish bone spur yield increasing and screen pipe well completion construction process | |
| CN204716201U (en) | A kind of pilot-controlled switch sliding sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140618 |