CN106677701A - Engineering geological drilling construction method based on thin-walled drilling tool - Google Patents

Engineering geological drilling construction method based on thin-walled drilling tool Download PDF

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Publication number
CN106677701A
CN106677701A CN201710058470.7A CN201710058470A CN106677701A CN 106677701 A CN106677701 A CN 106677701A CN 201710058470 A CN201710058470 A CN 201710058470A CN 106677701 A CN106677701 A CN 106677701A
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China
Prior art keywords
drilling
thin
tube
drilling tool
pipe assembly
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CN201710058470.7A
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CN106677701B (en
Inventor
王坚
刘绪勇
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ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co Ltd
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ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co Ltd
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Publication of CN106677701A publication Critical patent/CN106677701A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling

Abstract

The invention discloses an engineering geological drilling construction method based on a thin-walled drilling tool. According to the engineering geological drilling construction method based on the thin-walled drilling tool, a single rotary double-tube drilling tool is adopted, pressing drilling is conducted in rotation, the full-hole follow-pipe drilling speed is quick, slurry consumption is little, a rock core tube is kept to be in a non-rotation state, and disturbance on a soil layer is small; and when the drilling depth reaches the length of the rock core tube, an oil cylinder lifts the whole drilling machine away from the hole bottom for a section of distance to break off a rock core. The core taking quality is high, and an undisturbed soil sample can be extracted; during core taking and a standard penetration test, a drill rod and an outer tube assembly are kept in a drilled hole to be still all the time, the hole wall is protected, and damage, caused by repeatedly drill pipe lifting, to the hole wall is avoided; and meanwhile, friction between a test rod and the hole wall is reduced, uncertain factors are reduced, and the test result is more accurate.

Description

A kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool
Technical field
The present invention relates to engineering geological drilling technical field, more particularly to a kind of engineering geological drilling based on thin-walled drilling tool Construction method.
Background technology
Engineering geological drilling is, according to certain purpose and requirement, using drilling toolses stratum to be pierced, and takes out core and soil To verify geological condition and foundation capability, this needs to creep into topsoil and has special sampling requirement sample, but also needs Special test job carried out in drilling, take undisturbed soil sample to be one of purpose of engineering drilling, this is to determine soil The physico-mechanical propertieses such as the capacity of natural structure, density, temperature, shear strength and coefficient of compressibility, to carry out rock soil characteristics The bearing capacity and stability of soil layer are described and determined, for all kinds of engineering constructions reliable design considerationss are provided.
Engineering geological drilling most widely used at present is to utilize spindle drill(Such as XY-1 or XY-2 types)With single tube drilling tool, use Carbide drill machinery rotation method is crept into, water drilled dry of not bothering to see me out, and 0.5 ~ 2 meter of each drilling depth carries a wammel, coring and is entered Need to put forward a complete set of drill rod boring tool from hole during row standard penetration test (SPT), the maximum advantage of this method is low cost, behaviour Make simple, but limitation, the shortcoming of rig drilling tool is also clearly, it is big to soil layer disturbance due to being crept into using single tube, intricately Layer is difficult to extract undisturbed soil sample, causes core quality not good;In coring and standard penetration test (SPT), in addition it is also necessary to lift repeatedly or put down Whole drilling rod and drilling tool, are easily destroyed hole wall, and Jing often falls the phenomenons such as block, collapse hole, causes lock of tool drilling;Additionally, carry out During standard penetration test (SPT), drilling rod is subject to hammering generation elastic deformation easily to clash into hole wall, affects hole wall to stablize, while drilling rod and hole wall Frictional influence measuring accuracy.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of engineering geological drilling based on thin-walled drilling tool Construction method, it adopts single rotary double core barrel complete opening pipe-following drilling, in coring and standard penetration test (SPT), drilling rod and outer pipe assembly Then all the time drilling in remain stationary as, to soil layer disturb it is little, protection hole wall damage.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool, it is characterised in that comprise the following steps:
Step one, selection drilling tool, the drilling tool adopts the thin-walled drilling tool of single-action twin-pipes, the drilling tool to include outer pipe assembly and inner tube Assembly, the outer pipe assembly includes outer tube and the thin drilling bit installed in outer tube lower end, and said inner tube assembly includes core barrel With can bullet card of the holding in outer pipe assembly;
Step 2, by thin drilling bit be arranged on outer tube lower end, and by core barrel be arranged on bullet card lower end, it is total that bullet card is suspended on outer tube Into interior, outer pipe assembly upper end is connected by drilling rod with the unit head of rig;
Step 3, the unit head of rig drive drilling rod to drive the thin drilling bit rotary cutting ground on outer pipe assembly, oil cylinder pressurization Feeding, and core barrel keeps not rotation status and covers coring, core is constantly entered in core barrel;
Step 4, when drilling depth reach the length of core barrel after, oil cylinder by whole drilling tool lift-off bottom hole a small distance with Core is pulled off, and drilling rod is fixed by the clamp holder clamping of rig;
Step 5, wire line coring fisher is put down, the inner tube assembly for filling core is salvaged to come, and drilling rod and outer pipe assembly are then Remain stationary as, change another set of inner tube assembly to be reentered in outer pipe assembly the drilling for carrying out next round;
Step 6, repeat step three are to step 5, until drilling is to after the depth of expected probing, oil cylinder is by whole drilling tool lift-off hole Bottom a small distance puts down wire line coring fisher to pull off core, and the inner tube assembly for filling core is salvaged to come, and drilling rod Remain stationary as in drilling with outer pipe assembly;
Step 7, standard penetrometer is coupled together by reference test bar one by one, through drilling rod and outer pipe assembly drilling bottom is delivered to Portion;
Step 8, the top connection mark of reference test bar pass through hammer seat, and the mode for passing through hammer freely falling body using the mark above reference test bar is impacted Mark passes through hammer seat, carries out standard penetration test (SPT), and during testing, drilling rod and outer pipe assembly are remained stationary as in drilling;
After the completion of step 9, Standard piercing experiment, rapidly standard penetrometer is put forward using main winch.
Used as the improvement of above-mentioned technical proposal, in step 4 and step 6, oil cylinder is by whole drilling tool lift-off away from bottom hole 100mm is sentenced and is pulled off core.
Used as the improvement of above-mentioned technical proposal, the minimum diameter of the outer pipe assembly is not less than 56mm, the Standard piercing The maximum outside diameter of device is less than 50mm.
Used as the improvement of above-mentioned technical proposal, the external diameter of the thin drilling bit is 75.7mm, and internal diameter is 56mm.
As the improvement of above-mentioned technical proposal, in step 2, adjust and check the length of inner tube assembly, it is ensured that its not with The stepped portions of drill bit inwall are not contacted, and are crossed water space and are less than 1mm.
Beneficial effects of the present invention have:
This drilling operation method adopts single rotary double core barrel complete opening pipe-following drilling, the press-in drilling in revolution, and rate of penetration is very Hurry up, mud consumption is few, core barrel keeps not rotation status, little, coring quality height is disturbed to soil layer, can extract undisturbed soil sample, When coring and standard penetration test (SPT), drilling rod and outer pipe assembly are then remained stationary as in drilling all the time, protection hole wall, it is to avoid carry repeatedly Destruction hole wall is bored, while also reducing the friction of reference test bar and hole wall, uncertain factor is reduced, makes result of the test more accurate.
Description of the drawings
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described, wherein:
Fig. 1 is structural representation of the embodiment of the present invention when coring is crept into;
Fig. 2 is structural representation of the embodiment of the present invention in standard penetration test (SPT).
Specific embodiment
As shown in figure 1, thin-walled drilling tool of the drilling tool in the present invention for single-action twin-pipes, including outer pipe assembly 1 and plug outside Inner tube assembly 2 in pipe assembly 1, the outer pipe assembly 1 include be sequentially connected from top to bottom adapter coupling 11, bullet card room 12, Seat ring 13, outer tube 14, reamer 15 and thin drilling bit 16, the minimum diameter of the outer pipe assembly 1 is not less than 56mm, thin-walled drill 16 are made using hard alloy, and compact bit or diamond impregnated bit may also be employed, and external diameter is 75.7mm, and internal diameter is 56mm, said inner tube assembly 2 includes bore head assembly 21, core barrel 22, clip spring seat 23 and the card being sequentially connected from top to bottom Spring 24, seat ring 13 can limited support bore head assembly 21, bore head assembly 21 is provided with can coordinate clamping with adapter coupling 11 Bullet card 25.
As shown in Fig. 2 being equipped with reference test bar 3 in outer pipe assembly 1, the upper end of reference test bar 3 connection mark passes through hammer seat 4, lower end connection Standard penetrometer 5, the maximum outside diameter of standard penetrometer 5 is less than 50mm, to insert in outer pipe assembly 1.
A kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool of the present invention, comprises the following steps:
Step one, selection drilling tool, the drilling tool adopts the thin-walled drilling tool of single-action twin-pipes;
Step 2, by thin drilling bit 16 be arranged on the lower end of outer tube 14, and by core barrel 22 be arranged on the lower end of bullet card 25, bullet card 25 hang Hang in bullet card room 12, adjust and check the length of inner tube assembly 2, it is ensured that clip spring seat 23 not with the stepped portions of the inwall of drill bit 16 Do not contact, cross water space and be less than 1mm, the upper end of adapter coupling 11 is connected by drilling rod with the unit head of rig;
Step 3, the unit head of rig drive drilling rod to drive the rotary cutting ground of thin drilling bit 16 on outer pipe assembly 1, oil cylinder to add It is pressed into and core barrel 22 keeps not rotation status and covers coring, and core is constantly entered in core barrel 22;
Step 4, when drilling depth reach the length of core barrel 22 after, oil cylinder sentences whole drilling tool lift-off away from bottom hole 100mm Core is pulled off, and drilling rod is fixed by the clamp holder clamping of rig;
Step 5, wire line coring fisher is put down, the inner tube assembly 2 for filling core is salvaged to come, and drilling rod and outer pipe assembly 1 Then remain stationary as, change another set of inner tube assembly 2 to be reentered in outer pipe assembly 1 drilling for carrying out next round;
Step 6, repeat step three are to step 5, until drilling is to after the depth of expected probing, oil cylinder by whole drilling tool lift-off away from Bottom hole 100mm is sentenced and pulls off core, puts down wire line coring fisher, and the inner tube assembly 2 for filling core is salvaged to come, and drilling rod Remain stationary as in drilling with outer pipe assembly 1;
Step 7, standard penetrometer 5 is coupled together by reference test bar 3 one by one, through drilling rod and outer pipe assembly 1 drilling is delivered to Bottom;
Step 8, the top connection mark of reference test bar 3 pass through hammer seat 4, and the mode for passing through hammer freely falling body using the mark of the top of reference test bar 3 is hit Hammer seat 4 is passed through in mark, carries out standard penetration test (SPT), and during testing, drilling rod and outer pipe assembly 1 are remained stationary as in drilling;
After the completion of step 9, Standard piercing experiment, rapidly standard penetrometer 5 is put forward using main winch.
In two the step of the inventive method, clip spring seat 23 is not contacted with the stepped portions of the inwall of drill bit 16, is conveniently sent Water drilling enters, and crosses water space and be less than 1mm, and soil can be avoided to enter in drilling process between core barrel 22 and outer tube 14 Gap in, prevent from causing stuck core barrel 22.
Drilling tool press-in drilling in revolution, complete opening pipe-following drilling speed is very fast, in sandstone stratum and cobblestone stratum energy Enough that 25 meters or so were crept in 8 hours, mud consumption is few, little to soil layer disturbance because core barrel 22 keeps not rotation status, takes Core quality is high, can extract undisturbed soil sample, and in coring and standard penetration test (SPT), drilling rod and outer pipe assembly 1 are then interior in drilling all the time Remain stationary as, play a part of to protect hole wall, it is to avoid carry brill destruction hole wall repeatedly, while also reducing rubbing for reference test bar 3 and hole wall Wipe, it is to avoid hole wall is clashed into during 3 flexural deformation of reference test bar, reduce uncertain factor, make result of the test more accurate.
The above, simply better embodiment of the invention, but the present invention is not limited to above-described embodiment, as long as It reaches the technique effect of the present invention with any same or similar means, should all belong to protection scope of the present invention.

Claims (5)

1. a kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool, it is characterised in that comprise the following steps:
Step one, selection drilling tool, the drilling tool adopts the thin-walled drilling tool of single-action twin-pipes, the drilling tool to include outer pipe assembly and inner tube Assembly, the outer pipe assembly includes outer tube and the thin drilling bit installed in outer tube lower end, and said inner tube assembly includes core barrel With can bullet card of the holding in outer pipe assembly;
Step 2, by thin drilling bit be arranged on outer tube lower end, and by core barrel be arranged on bullet card lower end, it is total that bullet card is suspended on outer tube Into interior, outer pipe assembly upper end is connected by drilling rod with the unit head of rig;
Step 3, the unit head of rig drive drilling rod to drive the thin drilling bit rotary cutting ground on outer pipe assembly, oil cylinder pressurization Feeding, and core barrel keeps not rotation status and covers coring, core is constantly entered in core barrel;
Step 4, when drilling depth reach the length of core barrel after, oil cylinder by whole drilling tool lift-off bottom hole a small distance with Core is pulled off, and drilling rod is fixed by the clamp holder clamping of rig;
Step 5, wire line coring fisher is put down, the inner tube assembly for filling core is salvaged to come, and drilling rod and outer pipe assembly are then Remain stationary as, change another set of inner tube assembly to be reentered in outer pipe assembly the drilling for carrying out next round;
Step 6, repeat step three are to step 5, until drilling is to after the depth of expected probing, oil cylinder is by whole drilling tool lift-off hole Bottom a small distance puts down wire line coring fisher to pull off core, and the inner tube assembly for filling core is salvaged to come, and drilling rod Remain stationary as in drilling with outer pipe assembly;
Step 7, standard penetrometer is coupled together by reference test bar one by one, through drilling rod and outer pipe assembly drilling bottom is delivered to Portion;
Step 8, the top connection mark of reference test bar pass through hammer seat, and the mode for passing through hammer freely falling body using the mark above reference test bar is impacted Mark passes through hammer seat, carries out standard penetration test (SPT), and during testing, drilling rod and outer pipe assembly are remained stationary as in drilling;
After the completion of step 9, Standard piercing experiment, rapidly standard penetrometer is put forward using main winch.
2. a kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool according to claim 1, it is characterised in that In step 4 and step 6, whole drilling tool lift-off is sentenced and pulls off core by oil cylinder away from bottom hole 100mm.
3. a kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool according to claim 1, it is characterised in that institute The minimum diameter for stating outer pipe assembly is not less than 56mm, and the maximum outside diameter of the standard penetrometer is less than 50mm.
4. a kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool according to claim 1 or power 3, its feature exists In the external diameter of the thin drilling bit is 75.7mm, and internal diameter is 56mm.
5. a kind of Engineering Geologic Drilling Practice method based on thin-walled drilling tool according to claim 1, it is characterised in that In step 2, the length of inner tube assembly is adjusted and checked, it is ensured that it is not contacted with the stepped portions of drill bit inwall, cross water space Less than 1mm.
CN201710058470.7A 2017-01-23 2017-01-23 A kind of Engineering Geologic Drilling Practice method based on cord coring drill Active CN106677701B (en)

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CN201710058470.7A CN106677701B (en) 2017-01-23 2017-01-23 A kind of Engineering Geologic Drilling Practice method based on cord coring drill
PCT/CN2018/080003 WO2018133886A1 (en) 2017-01-23 2018-03-22 Rope coring drill-based engineering geology drilling construction method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018133886A1 (en) * 2017-01-23 2018-07-26 珠海市英格尔特种钻探设备有限公司 Rope coring drill-based engineering geology drilling construction method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2719889C1 (en) * 2019-07-09 2020-04-23 Федеральное государственное бюджетное образовательное учреждение высшего образования "Мурманский государственный технический университет" (ФГБОУ ВО "МГТУ") Drilling method in water area
CN110630173B (en) * 2019-09-30 2021-03-23 中国铁建重工集团股份有限公司 Core drilling machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015031475A1 (en) * 2013-08-27 2015-03-05 Baker Hughes Incorporated Mechanical core jam indicator for coring tools, coring tools including such core jam indicators, and related methods
US20150233201A1 (en) * 2014-02-18 2015-08-20 Baker Hughes Incorporated Coring tools with improved reliability during core jams, and related methods
CN105041250A (en) * 2015-06-30 2015-11-11 中国地质大学(武汉) Rope coring percussive drill tool
CN204920870U (en) * 2015-09-06 2015-12-30 唐山市金石超硬材料有限公司 Thin wall drilling tool is with drawing rock core jump ring
CN205713966U (en) * 2016-04-15 2016-11-23 中国地质科学院勘探技术研究所 A kind of combined type ocean gas hydrate seismic exploration drilling tool
CN106194087A (en) * 2016-07-21 2016-12-07 中国地质科学院勘探技术研究所 A kind of heavy caliber jumping chisel journey core drill and core-drilling method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1304470A1 (en) * 1984-08-31 1995-01-20 Всесоюзный Научно-Исследовательский Институт Буровой Техники Method for core drilling
JPH06137058A (en) * 1992-10-29 1994-05-17 Izumo Jiyoukoushiya:Kk Sampling method and sampler for stratum sample in soft stratum
CN101864916B (en) * 2010-05-27 2013-01-30 吉林大学 Hole bottom freezing cord coring drill and coring method thereof
CN102102498B (en) * 2010-11-26 2013-05-22 浙江大学 Rope coring system special for soft rock stratum drilling and using method thereof
KR101529654B1 (en) * 2013-11-15 2015-06-19 한국지질자원연구원 Coring system considering tilting of coring part and Method of compensating depth of coring part using the same
CN105041251B (en) * 2015-07-10 2017-03-08 吉林大学 Gas hydrate hole-bottom frozen double elastic-clip cord coring drill and coring method
CN104929554B (en) * 2015-07-10 2017-09-15 吉林大学 Pneumatic circulating freezing type gas hydrates cord coring drill and coring method
CN106677701B (en) * 2017-01-23 2018-08-17 珠海市英格尔特种钻探设备有限公司 A kind of Engineering Geologic Drilling Practice method based on cord coring drill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015031475A1 (en) * 2013-08-27 2015-03-05 Baker Hughes Incorporated Mechanical core jam indicator for coring tools, coring tools including such core jam indicators, and related methods
US20150233201A1 (en) * 2014-02-18 2015-08-20 Baker Hughes Incorporated Coring tools with improved reliability during core jams, and related methods
CN105041250A (en) * 2015-06-30 2015-11-11 中国地质大学(武汉) Rope coring percussive drill tool
CN204920870U (en) * 2015-09-06 2015-12-30 唐山市金石超硬材料有限公司 Thin wall drilling tool is with drawing rock core jump ring
CN205713966U (en) * 2016-04-15 2016-11-23 中国地质科学院勘探技术研究所 A kind of combined type ocean gas hydrate seismic exploration drilling tool
CN106194087A (en) * 2016-07-21 2016-12-07 中国地质科学院勘探技术研究所 A kind of heavy caliber jumping chisel journey core drill and core-drilling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018133886A1 (en) * 2017-01-23 2018-07-26 珠海市英格尔特种钻探设备有限公司 Rope coring drill-based engineering geology drilling construction method

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Address after: 519000 block a, No.12, Shenghui street, Jinding, high tech Zone, Zhuhai City, Guangdong Province

Patentee after: ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co.,Ltd.

Address before: 519000, room 29, 402 middle treasure road, Hengqin Town, Hengqin District, Guangdong, Zhuhai

Patentee before: ZHUHAI EGR SPECIAL DRILLING EQUIPMENT Co.,Ltd.