CN107893628A - Through Air Reverse Circulation down-hole hammer drilling technology - Google Patents
Through Air Reverse Circulation down-hole hammer drilling technology Download PDFInfo
- Publication number
- CN107893628A CN107893628A CN201711222316.5A CN201711222316A CN107893628A CN 107893628 A CN107893628 A CN 107893628A CN 201711222316 A CN201711222316 A CN 201711222316A CN 107893628 A CN107893628 A CN 107893628A
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- drilling
- pressure
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- stratum
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- 238000005553 drilling Methods 0.000 title claims abstract description 58
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 9
- 239000011435 rock Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Through Air Reverse Circulation down-hole hammer drilling technology, its processing step are：1. the drilling parameter on general stratum, crushed zone stratum and karst strata is determined first, determined according to setting formation properties, 2. the drilling parameter according to general stratum spuds in, 3. formation properties are judged according to the pressure of the drill in drilling process, unit the pressure of the drill is general stratum when being 15 25KN, unit the pressure of the drill is crushed zone stratum in 1.5KN or so, and unit the pressure of the drill is karst strata when being 10 15KN, 4. changes drilling parameter in time according to the bottom for judging to judge.Compared with prior art, present invention process method sentence layer in time, accurate, reacting cycle reliable operation, wear layer soon can down tube retaining wall in time, retaining wall is reliable, reduces accident, and efficiency high.
Description
Technical field
The present invention relates to a kind of drilling technology, especially a kind of through air suitable for bad ground shale gas exploitation
Reverse circulation down-the-hole hammer drilling technology.
Background technology
China's shale gas exploitation time is shorter, and shale gas drilling process is mainly transplanted in oil drilling technique, due to shale
Geological conditions existing for gas is more complicated, depth is deep, or even has the broken serious upper overburden formation that total depth is 1000 meters, has
A little rock stratum karsts developing area, cranny development, complicated hydrogeological conditions, alternating layers are interlocked, and routinely technique drilling efficiency is low, accident
It is more, it is mainly shown as：One is due to that complex formation, broken, lock of tool drilling happen occasionally, and sudden strong, and unfreezing is difficult；Second,
Structure development, groundwater net is crisscross, causes circulatory mediator usually to have into nothing, wastes substantial amounts of retaining wall material.Hole wall collapses
Collapse, burying, lock of tool drilling take place frequently；Third, unconformable strata alternating layers are interlocked, layer hardly possible is sentenced, specific aim technique is difficult to carry out.Construction effect
Rate is shunk significantly, and construction cost is multiplied.Therefore, a kind of through air suitable for bad ground shale gas exploitation is studied
Reverse circulation down-the-hole hammer drilling technology, it is the current technical issues that need to address.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of through sky suitable for bad ground shale gas exploitation
Gas reverse circulation down-the-hole hammer drilling technology.
The present invention solve its technical problem technical scheme be：
Through Air Reverse Circulation down-hole hammer drilling technology, it is characterised in that its processing step is：1. determine first usually
The drilling parameter of layer, crushed zone stratum and karst strata, determined according to setting formation properties, 2. joined according to the drilling on general stratum
Number spuds in, and 3. formation properties is judged according to the pressure of the drill in drilling process, unit the pressure of the drill is usually when being 15-25KN
Layer, unit the pressure of the drill is crushed zone stratum in 1.5KN or so, and unit the pressure of the drill is karst strata when being 10-15KN, 4. according to judgement
The bottom of judgement changes drilling parameter in time.
Preferably, general stratum bore diameter be Φ 400m, bore depth be 1000m when, wind pressure of work 1.2-2MPa；Work
It is 35m to make air quantity3/ min, deepen air quantity with hole depth and increase, drilling speed be 20-40m/h and 3-5m aperture blowing once；Rotating speed is 12-
20r/min；Crushed zone stratum wind pressure of work is in 0.8-1.2MPa；Pneumatics fan delivery >=30-70m3/min；Rotating speed is 12-20r/
Min and often 2m borehole cleanings are once；Karst strata drilling speed is in 10-15m/h, and rotating speed is in 10-15r/min, air quantity：Pneumatics fan delivery >=
35m3/min；Blast should be not less than 0.8MPa and per 2-3m borehole cleanings once.
The drilling parameter principle and points for attention on general stratum：
The rock breaking mechanism of through Air Reverse Circulation impactor as direct circulation, unlike reverse circulation with air quantity due to
On return differing greatly for section, air quantity difference is also larger.Reacting cycle air feed cost is the sub-fraction of direct circulation air feed cost,
Due to small with air quantity, it is fast that medium takes rock upward velocity, so drilling speed is also high.High drilling speed, accident risk can be substantially reduced or drawn
Drilling quality problems are played, so control technological parameter is still to be important.Below using 8 grades of stratum as standard, following drilling parameter is determined：
（1）Bore diameter Φ 400m；
（2）Bore deep 1000m；
（3）Wind pressure of work 1.2-2MPa；
（4）Work air quantity is 35m3/ min, deepen air quantity with hole depth and increase；
（5）Unit the pressure of the drill is 15-25KN, according to different lithology, drilling depth situation, it is excessive it is too small can all have a strong impact on drilling efficiency and
The tup life-span；
（6）Drilling speed is 20-40m/h, pays attention to 3-5m aperture blowing once, and retaining hole bottom is clean；
（7）Rotating speed is 12-20r/min, should not be too high, too high to aggravate tup abrasion；
（8）Notice that oil syringe lubricates, ensure that impactor is working properly；
（9）Unexpected blowing-out is prevented, adjunction drilling tool must purge bottom hole totally, first propose blowing-out after brill；
（10）First blow in descend to bore afterwards during lower brill；
（12）Drilling depth, and pay attention to bottom hole junk again after impactor work, clean rear regular feed.The technological parameter, reaches when most fast
To 300m/h, this is experimental, is used with caution.
2. the drilling parameter principle and points for attention on crushed zone stratum：
When boring chance crushed zone, the pressure of the drill can decline suddenly, and bed drain purge can increase suddenly, and air pressure can also decline, and ballistic work is obvious
Decline, impact sound and frequency of impact can all decline, and this is due to that stratum crushing reduces rock-cutting power, and broken rock speed adds
Greatly, drilling depth is accelerated to cause the pressure of the drill to reduce, bed drain purge increase, and tup impact is on fractured rock, with respect to intact rock, impulsive sound
Sound and frequency of impact can all have decline, and running into this situation must not advance rashly, if because substantial amounts of fractured rock can not effectively and
When discharge, underground drilling accident may be caused；The phenomenon can qualitative be crushed zone stratum；Quantitative drilling parameter：Bore and meet the stratum（1）
Unit the pressure of the drill is maintained at 1.5KN or so；（2）Wind pressure of work maintains 0.8-1.2MPa or slightly higher, and air quantity is bigger, blast is higher,
Effect is better；（3）Pneumatics fan delivery >=30-70m3/min（Aperture≤400mm）, worked simultaneously using two air compressor machines as far as possible；
（4）Rotating speed：12-20r/min, operation requirement be every 2m borehole cleanings once.Require to improve tup to last time borehole cleaning position during borehole cleaning,
And ensure that tup returns to bottom hole, otherwise will aperture blowing again, just can be with drilling depth, until safety pass through crushed zone after blowing clean.When broken
Broken band is contemplated that sleeve pipe retaining wall or foam aerating when thicker or cementing poor（Foam has certain retaining wall effect）Drilling, is buried
Bore or bit freezing, can adjunction crossover sub carry out blowback unfreezing, to increase more than one times of air quantity, the reality of the technological parameter during blowback
Apply, achieve promising result.Other points for attention are the same as 1.
3. the drilling parameter principle and points for attention of karst strata：
Through Air Reverse Circulation down-hole hammer, the reacting cycle operation principle of other forms is different from, it is according to aerodynamics
And the reverse circulation system that air characteristics are set up, it is stable and reliable in work, is particularly slipping dead band, as long as higher than working face not
More than 250mm reacting cycles, just energy normal work, investigation are substantially unaffected, and sky is slipped in construction can occur percussion drill accident, longer
Slip dead band or run into underground underground river, bottom hole displacement may be triggered, must be carried out with deviational survey back work is bored, ensure that displacement exists
Specific process parameter is as follows in allowed band：
（1）The pressure of the drill：Unit the pressure of the drill is controlled in the range of 10-15KN, recovers normal pressure after the completion of positioning；
（2）Controlled drilling rate or feeding rate, drilling speed general control according to lithology, karsts developing area situation, are more developed more in 10-15m
Slowly, otherwise can suitably accelerate；
（3）Rotating speed：10-15r/min should be maintained, prevents hole deviation；
（4）Air quantity：Due to slipping sky, part air quantity may be caused to have different degrees of leakage, deslagging effect can be influenceed, partly had and just follow
Ring is accumulated, or even burying, identical with crushed zone requirement to increase wind supply quantity；
（5）Blast：0.8MPa should be not less than, otherwise should increase wind supply quantity, keep operating pressure；
（6）It should be noted that preventing burying caused by the sillar of underground river carrying, silt, per 2-3m borehole cleanings once, accident is prevented；
（7）, could regular feed after impactor starts normally after slipping sky every time on earth；
（8）Operator or driller will maintain vigilance, and prevent high speed drilling string not well braked from causing the accident.Do not occur to creep into thing in the process implementing
Therefore using effect meets engineering design requirements；
4. the present invention is required hydrogeology：
Underwater buried depth must not exceed 70m under working condition, if more than 70m, because of operating back pressure increase, impactor will be unable to normal work
Make.
Other points for attention：
1. in shale gas probing, upper overburden formation is it is possible that a small amount of natural gas gas-bearing bed, it should be noted that finds, takes in time anti-
Control measure, prevent blowout and fire from occurring；
2. in addition to crushed zone, water-sensitive formation, retaining wall processing is carried out, be opened using brill after cement mortar pressure injection or setting of casing is cemented the well
Afterwards, can continue to creep into.
Compared with prior art, present invention process method sentence layer in time, accurate, reacting cycle reliable operation, wear layer soon can and
At present wall is managed and protected, retaining wall is reliable, reduces accident, and efficiency high.
Brief description of the drawings
Fig. 1 is the drilling process schematic diagram of the present invention.
Embodiment
Through Air Reverse Circulation down-hole hammer drilling technology, it is characterised in that its processing step is：1. determine first general
The drilling parameter on stratum, crushed zone stratum and karst strata, determined according to setting formation properties, 2. according to the drilling on general stratum
Parameter is spudded in, and 3. formation properties are judged according to the pressure of the drill in drilling process, and unit the pressure of the drill is usually when being 15-25KN
Layer, unit the pressure of the drill is crushed zone stratum in 1.5KN or so, and unit the pressure of the drill is karst strata when being 10-15KN, 4. according to judgement
The bottom of judgement changes drilling parameter in time.
General stratum bore diameter be Φ 400m, to bore depth be 1000m when, wind pressure of work 1.2-2MPa；Work air quantity
For 35m3/ min, deepen air quantity with hole depth and increase, drilling speed be 20-40m/h and 3-5m aperture blowing once；Rotating speed is 12-20r/min；
Crushed zone stratum wind pressure of work is in 0.8-1.2MPa；Pneumatics fan delivery >=30-70m3/min；Rotating speed is 12-20r/min and per 2m
Borehole cleaning is once；Karst strata drilling speed is in 10-15m, and rotating speed is in 10-15r/min, air quantity：Pneumatics fan delivery >=35m3/min；Blast
Should be not less than 0.8MPa and per 2-3m borehole cleanings once.
Claims (2)
1. through Air Reverse Circulation down-hole hammer drilling technology, it is characterised in that its processing step is：1. determine first usually
The drilling parameter of layer, crushed zone stratum and karst strata, determined according to setting formation properties, 2. joined according to the drilling on general stratum
Number spuds in, and 3. formation properties is judged according to the pressure of the drill in drilling process, unit the pressure of the drill is usually when being 15-25KN
Layer, unit the pressure of the drill is crushed zone stratum in 1.5KN or so, and unit the pressure of the drill is karst strata when being 10-15KN, 4. according to judgement
The bottom of judgement changes drilling parameter in time.
2. through Air Reverse Circulation down-hole hammer drilling technology according to claim 1, it is characterised in that general stratum exists
When bore diameter is Φ 400m, brill depth is 1000m, wind pressure of work 1.2-2MPa；Work air quantity is 35m3/ min, with hole depth plus
Deep air quantity increases, drilling speed be 20-40m/h and 3-5m aperture blowing once；Rotating speed is 12-20r/min；Crushed zone stratum wind pressure of work exists
0.8-1.2MPa；Pneumatics fan delivery >=30-70m3/min；Rotating speed be 12-20r/min and per 2m borehole cleanings once；Karst strata bores
Speed is in 10-15m, and rotating speed is in 10-15r/min, air quantity：Pneumatics fan delivery >=35m3/min；Blast should be not less than 0.8MPa and every
2-3m borehole cleanings are once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222316.5A CN107893628B (en) | 2017-11-29 | 2017-11-29 | Through Air Reverse Circulation down-hole hammer drilling technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222316.5A CN107893628B (en) | 2017-11-29 | 2017-11-29 | Through Air Reverse Circulation down-hole hammer drilling technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107893628A true CN107893628A (en) | 2018-04-10 |
| CN107893628B CN107893628B (en) | 2019-11-19 |
Family
ID=61806553
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711222316.5A Active CN107893628B (en) | 2017-11-29 | 2017-11-29 | Through Air Reverse Circulation down-hole hammer drilling technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN107893628B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377112A (en) * | 2020-09-30 | 2021-02-19 | 徐州雷曼机械科技有限公司 | Telescopic reverse circulation down-the-hole hammer drill rod |
| CN112627753A (en) * | 2020-12-23 | 2021-04-09 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN113236115A (en) * | 2021-06-27 | 2021-08-10 | 邯郸市伟业地热开发有限公司 | Method for passing broken belt in through type air reverse circulation down-the-hole hammer drilling |
| CN113565431A (en) * | 2021-08-27 | 2021-10-29 | 中国铁建重工集团股份有限公司 | Pressure control method of air compressor for pneumatic down-the-hole hammer |
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2017
- 2017-11-29 CN CN201711222316.5A patent/CN107893628B/en active Active
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| CN104632073A (en) * | 2013-11-07 | 2015-05-20 | 大连市勘察测绘研究院有限公司 | Reverse circulation drilling method of hollow down-hole hammer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377112A (en) * | 2020-09-30 | 2021-02-19 | 徐州雷曼机械科技有限公司 | Telescopic reverse circulation down-the-hole hammer drill rod |
| CN112627753A (en) * | 2020-12-23 | 2021-04-09 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN112627753B (en) * | 2020-12-23 | 2022-05-31 | 中煤水文局集团有限公司 | Method for maintaining mud circulation in lost-return stratum |
| CN113236115A (en) * | 2021-06-27 | 2021-08-10 | 邯郸市伟业地热开发有限公司 | Method for passing broken belt in through type air reverse circulation down-the-hole hammer drilling |
| CN113565431A (en) * | 2021-08-27 | 2021-10-29 | 中国铁建重工集团股份有限公司 | Pressure control method of air compressor for pneumatic down-the-hole hammer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107893628B (en) | 2019-11-19 |
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Denomination of invention: Drilling technology of through-type air reverse circulation DTH hammer Effective date of registration: 20220920 Granted publication date: 20191119 Pledgee: Guangping County Rural Credit Cooperative Pledgor: HANDAN WEIYE GEOTHERMAL DEVELOPMENT CO.,LTD. Registration number: Y2022130000073 |
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Address after: 057651 North side of the middle section of Jin Guangyuan Road, Guangping County, Handan City, Hebei Province Patentee after: Hebei Weiye Geothermal New Energy Technology Co.,Ltd. Address before: 057650 north side of Jinguang Yuan Road, Guang Ping County, Handan, Hebei Patentee before: HANDAN WEIYE GEOTHERMAL DEVELOPMENT CO.,LTD. |
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Granted publication date: 20191119 Pledgee: Guangping County Rural Credit Cooperative Pledgor: HANDAN WEIYE GEOTHERMAL DEVELOPMENT CO.,LTD. Registration number: Y2022130000073 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Drilling technology of through type air reverse circulation down the hole hammer Granted publication date: 20191119 Pledgee: Guangping County Rural Credit Cooperative Pledgor: Hebei Weiye Geothermal New Energy Technology Co.,Ltd. Registration number: Y2024130000025 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20191119 Pledgee: Guangping County Rural Credit Cooperative Pledgor: Hebei Weiye Geothermal New Energy Technology Co.,Ltd. Registration number: Y2024130000025 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Drilling technology of through type air reverse circulation down the hole hammer Granted publication date: 20191119 Pledgee: Guangping County Rural Credit Cooperative Pledgor: Hebei Weiye Geothermal New Energy Technology Co.,Ltd. Registration number: Y2024980046823 |