CN105672916A - Composite geothermal well washing tool and well washing technology method - Google Patents
Composite geothermal well washing tool and well washing technology method Download PDFInfo
- Publication number
- CN105672916A CN105672916A CN201610235286.0A CN201610235286A CN105672916A CN 105672916 A CN105672916 A CN 105672916A CN 201610235286 A CN201610235286 A CN 201610235286A CN 105672916 A CN105672916 A CN 105672916A
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- China
- Prior art keywords
- well
- piston
- flushing
- well washing
- communicating pipe
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- Pending
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- 238000005406 washing Methods 0.000 title claims abstract description 28
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title abstract description 11
- 239000002131 composite material Substances 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 3
- 238000011010 flushing procedure Methods 0.000 claims description 76
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract 4
- 238000009991 scouring Methods 0.000 abstract 1
- 230000000699 topical effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 206010016825 Flushing Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940059082 douche Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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)
- Nozzles (AREA)
Abstract
The invention discloses a composite geothermal well washing tool and a well washing technology method.The well washing tool comprises a piston well washing portion and a spraying well washing portion; the piston well washing portion comprises a detachable upper connector, a fixing screw sleeve, detachable piston baffles, multiple detachable piston sheets, a support sleeve between pistons, a small fixed baffle and a first communicating pipe; the spraying well washing portion comprises a second communicating pipe, a lower connector and jetting holes.The well washing technology comprises the steps that residual mud hulls on the well wall are shocked and broken through jetting flow which is formed under the action of high-pressure water and used for scouring the hole walls and the instantaneous topical negative pressure and violent water power which are caused by repeated and vertical movement of rubber pistons in the pipe, thick mud and part of fine sand in a gravel layer and a water-bearing layer outside the pipe are sucked out, and then the well washing purpose is achieved.According to the composite geothermal well washing tool and the well washing technology method, piston well washing and high-pressure water flow spraying well washing are combined, therefore, not only can high-pressure water flow spraying well washing be achieved, but also piston well washing assisting can be performed at the same time, the geothermal well washing time consumption is reduced, the well washing quality is guaranteed, and the well washing efficiency is improved.
Description
Technical field
The present invention relates to geothermal well well-flushing field, be specifically related to a kind of geothermal well combined type well-flushing instrument and technology for washing well method.
Background technology
Along with the development of drilling equipment ability, the geothermal exploitation degree of depth and range, geothermal well drilling depth is typically up to more than two kms, and a lot of area probing three, four kms just can obtain the geothermal energy resources that grade is higher. Storing up water-bearing layer due to heat and bury relatively deep, the wellbore construction cycle is long, and slurry liquid note pressure is big, and water-bearing layer is produced stronger contamination and plugging effect by the detrital material such as drilling fluid, landwaste, and these make well-flushing link face higher requirement. Taking cost into account, current domestic geothermal well well-flushing mainly uses High-Pressure Water spurt method or piston well-flushing method that geothermal well is carried out well-flushing.
When actual production operation, along with drilling depth is continuously increased, sometimes after with single method well-flushing, it may appear that the situation that well washing effect is not good, after a well-flushing, water yield does not reach designing requirement, it has to carry out secondary well-flushing even three well-flushings. So not only extend time between well-flushings, and consume a large amount of manpower financial capacity.
Analyze according to well-flushing Construction practices data (personnel, machinery, material, method, environment, six aspect data of measurement), monotype well-flushing is adopted to often result in well-flushing length consuming time, repeatedly well-flushing often, namely other auxiliary reasons enable and cause well-flushing increase consuming time, but the time increased is also little. It causes well-flushing main cause often mainly to have 2 points: one is that well-flushing instrumental function is single; Two is that jet water course pressure is low.
Summary of the invention
The technical problem to be solved in the present invention is, above shortcomings are drilled for existing geothermal well, a kind of geothermal well combined type well-flushing instrument and technology for washing well method are provided, it is possible not only to High-Pressure Water injection well-flushing, and piston well-flushing auxiliary can be carried out simultaneously, reduce geothermal well well-flushing number of times and consuming time, significantly improve efficiency and the quality of well-flushing.
The present invention solves that above-mentioned technical problem be the technical scheme is that
A kind of geothermal well combined type well-flushing instrument, including piston well-flushing part and injection well-flushing part, piston well-flushing part includes detachable top connection, fixing silk braid, detachable piston baffle, the detachable piston sheet of multipage, piston space support set, fixed small front apron and the first communicating pipe; Injection well-flushing part includes the second communicating pipe, lower contact, spray-hole; First communicating pipe upper end by the detachable top connection of screwed connection, the first communicating pipe below detachable top connection arranges fixing silk braid, fixed small front apron and multiple rubber piston, the first communicating pipe between rubber piston between two is socketed with piston space support set, multiple rubber pistons are fixed between the fixing device being made up of fixing silk braid and fixed small front apron, and each rubber piston includes detachable piston baffle and the detachable piston sheet of multipage; First communicating pipe lower end be connected with the second communicating pipe by lower contact, the second communicating pipe was drilled with multiple spray-hole.
By such scheme, the diameter of detachable piston baffle and the detachable piston sheet of multipage is changed according to the size dimension of the casing inner diameter of corresponding piston space support set.
By such scheme, the length of piston space support set needs the thickness regulated to change (the piston space support set that replacing is of convenient length guarantees rubber piston thickness scalable) according to rubber piston.
By such scheme, rubber piston needs the thickness regulated to regulate according to the mudcake thickness or fine and close situation that need to clean hole wall in practice of construction.
By such scheme, suitably adjust the quantity of the spray-hole on the second communicating pipe according to injection hydraulic demand. .
The technology for washing well of geothermal well combined type well-flushing instrument of the present invention, after geothermal well completion sequence terminates, continuously performs injection and piston well-flushing, specifically includes following steps:
1) water under high pressure injected carries out injection well-flushing by forming the injection stream washing away hole wall under the spray-hole effect on the second communicating pipe;
2) rubber piston upper and lower pull motion within the first communicating pipe simultaneously, repeatedly causes instantaneous local decompression and fierce hydraulic blow to destroy borehole wall residual mud skin, pumps out the thickened drilling fluid and part fine sand managed in outer gravel layer and water-bearing layer, it is achieved piston well-flushing;
3) until well head returns the cleerer and more peaceful silt particle that is substantially free of of liquid, well-flushing completes.
Compared with prior art, the invention has the beneficial effects as follows:
1, piston well-flushing is combined use with High-Pressure Water injection both well-flushings technique by the present invention, combined type well-flushing instrument after invention combination, it is possible not only to change the quantity of spray-hole to regulate the pressure of jet water course in conjunction with practical situation, and make piercer have jet douche and piston well-flushing two aspect effect, it is possible not only to High-Pressure Water injection well-flushing, and piston well-flushing auxiliary can be carried out simultaneously, decrease geothermal well well-flushing machine-team, reduce geothermal well well-flushing consuming time, efficiency and the quality of well-flushing can be significantly improved, there is good market application foreground;
2, rubber piston diameter and rubber piston thickness can flexible, coordinate the piercer of many different hydrophthalmia quantity and hydrophthalmia size to be suitable for the well-flushing work of all calibers and payzone.
Accompanying drawing explanation
Fig. 1 is geothermal well combined type well-flushing tool construction schematic diagram of the present invention;
Fig. 2 is the piston well-flushing part-structure schematic diagram of geothermal well combined type well-flushing instrument in Fig. 1;
Fig. 3 is the injection well-flushing part-structure schematic diagram of geothermal well combined type well-flushing instrument in Fig. 1;
In figure, I-piston well-flushing part, the detachable top connection of 1-, 2-fixing silk braid, the detachable piston baffle of 3-, the detachable piston sheet of 4-multipage, 5-piston space support set, the fixed small front apron of 6-; II-injection well-flushing part, the first communicating pipe of 7-, 8-lower contact, 9-spray-hole, the second communicating pipe of 10-.
Detailed description of the invention
Below in conjunction with accompanying drawing and example, technical solution of the present invention is described in detail.
With reference to shown in Fig. 1, geothermal well combined type well-flushing instrument of the present invention, including piston well-flushing part I and injection well-flushing part ii.
With reference to shown in Fig. 2, piston well-flushing part I includes detachable top connection 1, fixing silk braid 2, detachable piston baffle 3, the detachable piston sheet of multipage 4, piston space support set 5, fixed small front apron 6 and the first communicating pipe 7; First communicating pipe 7 upper end by the detachable top connection 1(tool joint of screwed connection), the first communicating pipe 7 below detachable top connection 1 arranges fixing silk braid 2, fixed small front apron 6 and multiple rubber piston, the first communicating pipe 7 between rubber piston between two is socketed with piston space support set 5, multiple rubber pistons are fixed between the fixing device being made up of fixing silk braid 2 and fixed small front apron 6, and each rubber piston includes detachable piston baffle 3 and the detachable piston sheet 4 of multipage.
With reference to shown in Fig. 3, injection well-flushing part ii (injection well-flushing weldment) includes the second communicating pipe 10, lower contact 8, spray-hole 9. First communicating pipe 7 lower end be connected with the second communicating pipe 10 by lower contact 8, the second communicating pipe 10 was drilled with multiple spray-hole 9.
The size dimension of the casing inner diameter according to piston space support set 5 changes detachable piston baffle 3 and the detachable piston sheet 4 of multipage of respective diameters.
The thickness regulated is needed to change the piston space support set 5 being of convenient length according to rubber piston, it is ensured that rubber piston thickness (corresponding rubber piston number) also scalable. Rubber piston needs the thickness regulated to regulate according to the mudcake thickness or fine and close situation that need to clean hole wall in practice of construction.
The quantity of the spray-hole 9 on the second communicating pipe 10 is suitably adjusted according to injection hydraulic demand. Pump pressure difference changes difference injection well-flushing part ii and piercer as required.
Well-flushing piercer in example 89mm drilling rod is processed, radial distribution four draining eye, single hydrophthalmia spacing 15cm, adjacent two draining eye 90 ° of processing of dislocation. The total hydrophthalmia length of piercer needs to regulate according to pump pressure, general 1.5-2.0m, and bellmouth is processed in piercer lower end, can circulate by pulp when changing slurry, throws iron ball and shut during punching, and iron ball diameter is usually 3cm.
In well-flushing instrument of the present invention rubber piston diameter and rubber piston thickness can flexible, coordinate the piercer of many different hydrophthalmia quantity and hydrophthalmia size to be suitable for the well-flushing work of all calibers and payzone.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention. For those of ordinary skill in the field, spirit under this invention is extended out apparent change or variation are still among protection scope of the present invention.
Claims (6)
1. a geothermal well combined type well-flushing instrument, it is characterized in that, including piston well-flushing part and injection well-flushing part, piston well-flushing part includes detachable top connection (1), fixing silk braid (2), detachable piston baffle (3), the detachable piston sheet of multipage (4), piston space support set (5), fixed small front apron (6) and the first communicating pipe (7);Injection well-flushing part includes the second communicating pipe (10), lower contact (8), spray-hole (9); The detachable top connection of screwed connection (1) is passed through in first communicating pipe (7) upper end, first communicating pipe (7) of detachable top connection (1) lower section arranges fixing silk braid (2), fixed small front apron (6) and multiple rubber piston, the first communicating pipe (7) between rubber piston between two is socketed with piston space support set (5), multiple rubber pistons are fixed between the fixing device being made up of fixing silk braid (2) and fixed small front apron (6), and each rubber piston includes detachable piston baffle (3) and the detachable piston sheet of multipage (4); First communicating pipe (7) lower end is connected with the second communicating pipe (10) by lower contact (8), and the second communicating pipe (10) is drilled with multiple spray-hole (9).
2. geothermal well combined type well-flushing instrument according to claim 1, it is characterized in that, the diameter of detachable piston baffle (3) and the detachable piston sheet of multipage (4) is changed according to the size dimension of the casing inner diameter of corresponding piston space support set (5).
3. geothermal well combined type well-flushing instrument according to claim 1, it is characterised in that the length of piston space support set (5) needs the thickness regulated to change according to rubber piston.
4. geothermal well combined type well-flushing instrument according to claim 3, it is characterised in that rubber piston needs the thickness regulated to regulate according to the mudcake thickness or fine and close situation that need to clean hole wall in practice of construction.
5. geothermal well combined type well-flushing instrument according to claim 1, it is characterised in that suitably adjust the quantity of the spray-hole (9) on the second communicating pipe (10) according to injection hydraulic demand.
6. the technology for washing well of a geothermal well combined type well-flushing instrument according to claim 1, it is characterised in that after geothermal well completion sequence terminates, continuously performs injection well-flushing and piston well-flushing, specifically includes following steps:
1) water under high pressure injected carries out injection well-flushing by the lower injection stream washing away hole wall that formed of spray-hole (9) effect on the second communicating pipe (10);
2) rubber piston upper and lower pull motion within the first communicating pipe (7) simultaneously, repeatedly causes instantaneous local decompression and fierce hydraulic blow to destroy borehole wall residual mud skin, pumps out the thickened drilling fluid and part fine sand managed in outer gravel layer and water-bearing layer, it is achieved piston well-flushing;
3) until well head returns the cleerer and more peaceful silt particle that is substantially free of of liquid, well-flushing completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610235286.0A CN105672916A (en) | 2016-04-15 | 2016-04-15 | Composite geothermal well washing tool and well washing technology method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610235286.0A CN105672916A (en) | 2016-04-15 | 2016-04-15 | Composite geothermal well washing tool and well washing technology method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105672916A true CN105672916A (en) | 2016-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610235286.0A Pending CN105672916A (en) | 2016-04-15 | 2016-04-15 | Composite geothermal well washing tool and well washing technology method |
Country Status (1)
| Country | Link |
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| CN (1) | CN105672916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386254A (en) * | 2017-08-08 | 2019-02-26 | 魏志海 | Dry-hot-rock geothermal well high voltagehigh frequency vibrates well-washing device |
| CN110593781A (en) * | 2019-09-27 | 2019-12-20 | 中国矿业大学(北京) | Coal powder discharging device for coal bed gas exploitation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505341A (en) * | 1982-03-16 | 1985-03-19 | Moody Arlin R | Combination clean-out and drilling tool |
| CN1370908A (en) * | 2001-02-23 | 2002-09-25 | 中国石化胜利油田有限公司采油工艺研究院 | Continuous flushing tool |
| RU2364705C1 (en) * | 2007-12-17 | 2009-08-20 | Николай Александрович Шамов | Device for removing of processing depositions, washing and wells development with low formation pressure (versions) |
| CN202560130U (en) * | 2012-04-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Rotary jet-flow well flushing device |
| CN202673137U (en) * | 2012-05-14 | 2013-01-16 | 上海长凯岩土工程有限公司 | Piston type nail drift |
| CN205243452U (en) * | 2015-12-16 | 2016-05-18 | 辛广峰 | Horizontal well sand washing sprayer |
| CN205532402U (en) * | 2016-04-15 | 2016-08-31 | 中国地质大学（武汉） | Geothermal well combined type well -flushing instrument |
-
2016
- 2016-04-15 CN CN201610235286.0A patent/CN105672916A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505341A (en) * | 1982-03-16 | 1985-03-19 | Moody Arlin R | Combination clean-out and drilling tool |
| CN1370908A (en) * | 2001-02-23 | 2002-09-25 | 中国石化胜利油田有限公司采油工艺研究院 | Continuous flushing tool |
| RU2364705C1 (en) * | 2007-12-17 | 2009-08-20 | Николай Александрович Шамов | Device for removing of processing depositions, washing and wells development with low formation pressure (versions) |
| CN202560130U (en) * | 2012-04-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Rotary jet-flow well flushing device |
| CN202673137U (en) * | 2012-05-14 | 2013-01-16 | 上海长凯岩土工程有限公司 | Piston type nail drift |
| CN205243452U (en) * | 2015-12-16 | 2016-05-18 | 辛广峰 | Horizontal well sand washing sprayer |
| CN205532402U (en) * | 2016-04-15 | 2016-08-31 | 中国地质大学（武汉） | Geothermal well combined type well -flushing instrument |
Non-Patent Citations (1)
| Title |
|---|
| 郭连科: "《供水管井设计与施工 增订版》", 30 October 1964, 中国建筑工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386254A (en) * | 2017-08-08 | 2019-02-26 | 魏志海 | Dry-hot-rock geothermal well high voltagehigh frequency vibrates well-washing device |
| CN110593781A (en) * | 2019-09-27 | 2019-12-20 | 中国矿业大学(北京) | Coal powder discharging device for coal bed gas exploitation |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160615 |
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| RJ01 | Rejection of invention patent application after publication |