CN108643827B - A kind of hole structure construction method increasing ground-dipping uranium extraction pumping liquid measure - Google Patents
A kind of hole structure construction method increasing ground-dipping uranium extraction pumping liquid measure Download PDFInfo
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- CN108643827B CN108643827B CN201810367888.0A CN201810367888A CN108643827B CN 108643827 B CN108643827 B CN 108643827B CN 201810367888 A CN201810367888 A CN 201810367888A CN 108643827 B CN108643827 B CN 108643827B
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- construction method
- drilling
- liquid measure
- pumping liquid
- ground
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
Abstract
The present invention relates to the extract technology fields of uranium, specifically disclose a kind of hole structure construction method that can increase ground-dipping uranium extraction pumping liquid measure, comprising steps of (a) carries out open-hole drilling, casing installation and slip casting well cementation；(b) casing protection device is installed on drilling rod；(c) decentralization of Drilling bore bit in secondary pipe is carried out after the fresh drill-in fluid of preparation；(d) section containing mine creep into secondary pipe；(e) clear water punching is carried out；(f) filter device is transferred.The method of the present invention short construction period, sediment prevention are preferably, drilling well completion rate is high, well-flushing labor intensity is small, at low cost and construction quality is higher, can be realized the upgrading, synergy and consumption reduction of drilling construction.
Description
Technical field
The invention belongs to the extract technology fields of uranium, and in particular to one kind can increase the drilling knot of ground-dipping uranium extraction pumping liquid measure
Structure construction method.
Background technique
In-situ leaching process drilling is the unique passage that leaching agent enters sandstone uranium deposits and leachate is promoted to earth's surface, it is controlled
Injection distribution of the leaching agent in water-bearing layer containing mine and the transport conditions in ore bed, determine that can leaching agent sufficiently and ore bed
In uranium mineral react, whether leachate by underground water dilute strength and groundwater environment pollutes and pollutes journey
Degree.Meanwhile the construction cost and quality of ground leaching drilling largely determine the technical and economic feasibility of in-situ leach mining, open
The reasonability and validity adopted.Therefore it improves in-situ leaching process drilling construction efficiency and drilling quality is in-situ leach mining upgrading synergy
It is crucial.
The more ground leaching hole structure of application at present is that gravel structure is filled out in large aperture, which is using large aperture drill bit
Aperture, to guarantee that the accuracy of geophysical logging replaces small drill bit and expose ore bed, in benefit when being drilled into the top plate top of water-bearing layer containing mine
With large aperture drill bit reaming, successively tripping in desilting pipe, the outer skeleton filter of annular and casing, to meet filter segment permeability,
It prevents silt from entering filter simultaneously, needs to carry out filter segment to fill out gravel, finally be cemented the well using grouting process outside casing
Sealing of hole.Large aperture fills out gravel hole structure and has the disadvantage that 1) long construction period during constructing and at well；2) sediment prevention
It is poor；3) drilling well completion rate is low；4) well-flushing large labor intensity；5) at high cost；6) construction quality is poor.
In order to solve above-mentioned deficiency, need to research and develop a kind of new ground-dipping uranium extraction hole structure construction method.
Summary of the invention
The purpose of the present invention is to provide the hole structure construction methods that one kind can increase ground-dipping uranium extraction pumping liquid measure, to mention
High in-situ leaching process drilling construction efficiency.
Technical scheme is as follows:
A kind of hole structure construction method increasing ground-dipping uranium extraction pumping liquid measure, comprising the following steps:
(a) open-hole drilling, casing installation and slip casting well cementation are carried out；
(b) casing protection device is installed on drilling rod, makes its residence for limiting drilling rod position during drill bit is crept into
In, to reduce casing wear；
(c) decentralization of Drilling bore bit in secondary pipe is carried out after the fresh drill-in fluid of preparation, fresh drill-in fluid is in well inner recirculation flow
It is dynamic, stop decentralization after drill bit is transferred to the ore bed section top of design, entire decentralization process speed is uniform；
(d) section containing mine creep into secondary pipe, the depth of drilling section is that the ore bed section top of design is arrived in secondary pipe
The ore bed pars infrasegmentalis of design；
(e) clear water punching is carried out, when being discharged silt content≤20g/L, stops punching；
(f) filter device is transferred after filter device outer layer covers gauze.
It is 150~220mm that open-hole described in step (a), which creeps into diameter,.
Open-hole drilling depth described in step (a) is earth's surface to desilting bottom of the tube.
Casing protection device described in step (b) is hollow tubular structure, the internal diameter and drilling rod outer diameter of casing protection device
Matching, the wall thickness range of casing protection device are 15~25mm, length 200mm.
Casing protection device material described in step (b) is nylon.
Entire decentralization process speed < 2m/s described in step (c).
Fresh drill-in fluid described in step (c) is made of bentonite and water, wherein silt content < 4%, viscosity < 18s, density
For 1.1g/cm3。
Step (d) controls 100~200r/min of drill speed, 3~5cm/min of bit penetration, creeps into diameter >=Ф
240mm guarantees area of passage.
Step (f) the gauze aperture specification is 50cm × 50cm.
It is 150~220mm that open-hole described in step (a), which creeps into diameter, and open-hole drilling depth is earth's surface to desilting bottom of the tube；
Casing protection device described in step (b) is hollow tubular structure, the internal diameter and drilling rod outer diameter of casing protection device
The wall thickness range of matching, casing protection device is 15~25mm, and length 200mm, material is nylon；
Entire decentralization process speed < 2m/s, the fresh drill-in fluid described in step (c) are made of bentonite and water,
Wherein silt content < 4%, viscosity < 18s, density 1.1g/cm3；
Step (d) controls 100~200r/min of drill speed, 3~5cm/min of bit penetration, creeps into diameter >=Ф
240mm guarantees area of passage；
Step (f) the gauze aperture specification is 50cm × 50cm.
Remarkable result of the invention is: one kind of the present invention can increase the hole structure construction party of ground-dipping uranium extraction pumping liquid measure
Method, short construction period, sediment prevention are preferably, drilling well completion rate is high, well-flushing labor intensity is small, at low cost and construction quality is higher,
It can be realized the upgrading, synergy and consumption reduction of drilling construction.
Detailed description of the invention
Fig. 1 is hole structure schematic diagram of the present invention；
Fig. 2 is the process flow diagram of construction method of the present invention；
Fig. 3 is casing protection device.
In figure: 1. casings；2. open-hole；3. slip casting is cemented the well；4. filter；5. creeping into section in secondary pipe；6. section containing mine.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
One kind as shown in Figs. 1-2 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, including following step
It is rapid:
(a) drilling of open-hole 2, the installation of casing 1 and slip casting well cementation 3 are carried out, it is 150~220mm that wherein open-hole 2, which creeps into diameter,
2 drilling depth of open-hole is earth's surface to desilting bottom of the tube；
(b) casing protection device is installed on drilling rod, makes its residence for limiting drilling rod position during drill bit is crept into
In, to reduce casing wear；Described sleeve pipe protective device is hollow tubular structure, and material is nylon, casing protection device it is interior
Diameter is matched with drilling rod outer diameter, and the wall thickness range of casing protection device is 15~25mm, length 200mm, as shown in Figure 3；
(c) decentralization of Drilling bore bit in secondary pipe is carried out after the fresh drill-in fluid of preparation, fresh drill-in fluid is in well inner recirculation flow
It is dynamic, stop decentralization after drill bit is transferred to the ore bed section top of design；Entire decentralization process speed is uniform, speed < 2m/s；Institute
The fresh drill-in fluid stated is made of bentonite and water, wherein silt content < 4%, viscosity < 18s, density 1.1g/cm3；
(d) section containing mine 6 creep into secondary pipe, the depth of drilling section 5 is the ore bed section top of design in secondary pipe
To the ore bed pars infrasegmentalis of design, 100~200r/min of drill speed, 3~5cm/min of bit penetration are controlled, creeps into diameter
>=Ф 240mm guarantees area of passage；
(e) clear water punching is carried out, when being discharged silt content≤20g/L, stops punching；
(f) filter device is transferred after filter device outer layer covers gauze, gauze aperture specification is 50cm × 50cm.
Claims (10)
1. the hole structure construction method that one kind can increase ground-dipping uranium extraction pumping liquid measure, it is characterised in that: the following steps are included:
(a) open-hole drilling, casing installation and slip casting well cementation are carried out；
(b) casing protection device is installed on drilling rod, keeps it placed in the middle for limiting drilling rod position during drill bit is crept into, with
Reduce casing wear；
(c) prepare the decentralization that Drilling bore bit in secondary pipe is carried out after fresh drill-in fluid, fresh drill-in fluid in well internal circulation flow, when
Drill bit stops decentralization after transferring to the ore bed section top of design, and entire decentralization process speed is uniform；
(d) section containing mine creep into secondary pipe, the depth of drilling section be the ore bed section top of design to designing in secondary pipe
Ore bed pars infrasegmentalis；
(e) clear water punching is carried out, when being discharged silt content≤20g/L, stops punching；
(f) filter device is transferred after filter device outer layer covers gauze.
2. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: it is 150~220mm that open-hole described in step (a), which creeps into diameter,.
3. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: open-hole drilling depth described in step (a) is earth's surface to desilting bottom of the tube.
4. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: casing protection device described in step (b) is hollow tubular structure, and the internal diameter of casing protection device is matched with drilling rod outer diameter,
The wall thickness range of casing protection device is 15~25mm, length 200mm.
5. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: casing protection device material described in step (b) is nylon.
6. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: entire decentralization process speed < 2m/s described in step (c).
7. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: fresh drill-in fluid described in step (c) is made of bentonite and water, wherein silt content < 4%, viscosity < 18s, and density is
1.1g/cm3。
8. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: step (d) controls 100~200r/min of drill speed, 3~5cm/min of bit penetration, creeps into diameter >=Ф 240mm,
Guarantee area of passage.
9. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: step (f) the gauze aperture specification is 50cm × 50cm.
10. one kind as described in claim 1 can increase the hole structure construction method of ground-dipping uranium extraction pumping liquid measure, feature exists
In: it is 150~220mm that open-hole described in step (a), which creeps into diameter, and open-hole drilling depth is earth's surface to desilting bottom of the tube；
Casing protection device described in step (b) is hollow tubular structure, and the internal diameter of casing protection device is matched with drilling rod outer diameter,
The wall thickness range of casing protection device is 15~25mm, and length 200mm, material is nylon；
Entire decentralization process speed < 2m/s, the fresh drill-in fluid described in step (c) are made of bentonite and water, wherein
Silt content < 4%, viscosity < 18s, density 1.1g/cm3；
Step (d) controls 100~200r/min of drill speed, 3~5cm/min of bit penetration, creeps into diameter >=Ф
240mm guarantees area of passage；
Step (f) the gauze aperture specification is 50cm × 50cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810367888.0A CN108643827B (en) | 2018-04-23 | 2018-04-23 | A kind of hole structure construction method increasing ground-dipping uranium extraction pumping liquid measure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810367888.0A CN108643827B (en) | 2018-04-23 | 2018-04-23 | A kind of hole structure construction method increasing ground-dipping uranium extraction pumping liquid measure |
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| Publication Number | Publication Date |
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| CN108643827A CN108643827A (en) | 2018-10-12 |
| CN108643827B true CN108643827B (en) | 2019-08-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110130825B (en) * | 2019-04-17 | 2020-12-15 | 中核通辽铀业有限责任公司 | Method for increasing flow area of in-situ leaching uranium mining production well |
| CN111155925A (en) * | 2019-07-22 | 2020-05-15 | 中广核铀业新疆发展有限公司 | Vertical shaft type drilling process for uranium deposit in steep dry clastic rock stratum and application |
| CN112647902B (en) * | 2020-12-25 | 2023-05-26 | 核工业北京化工冶金研究院 | In-situ leaching uranium mining drilling filter and well forming method |
| CN113431512A (en) * | 2021-05-27 | 2021-09-24 | 中煤地质集团有限公司 | Ground-immersed drilling construction process |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3866683A (en) * | 1974-02-01 | 1975-02-18 | Union Oil Co | Method for placing cement in a well |
| US6581689B2 (en) * | 2001-06-28 | 2003-06-24 | Halliburton Energy Services, Inc. | Screen assembly and method for gravel packing an interval of a wellbore |
| CN102102502A (en) * | 2010-12-23 | 2011-06-22 | 核工业北京化工冶金研究院 | Method for arranging in-situ leaching hole drilling filter |
| CN106507866B (en) * | 2012-05-10 | 2014-07-23 | 核工业北京化工冶金研究院 | Original place loosens leaches uranium extraction method |
| CN103899244B (en) * | 2012-12-25 | 2016-08-03 | 新疆中核天山铀业有限公司 | The method of ground-dipping uranium extraction broken hole drilling repaired by a kind of expanding material |
| CN203655249U (en) * | 2013-12-23 | 2014-06-18 | 新疆中核天山铀业有限公司 | In-situ leaching uranium mining process well |
| CN106555567A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | High angle hole, horizontal cementing abrasionproof plug |
| CN107366505B (en) * | 2017-05-27 | 2019-05-17 | 中核通辽铀业有限责任公司 | A kind of ground-dipping uranium extraction hole structure construction method |
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