CN104131796A - Well bottom foaming foam drilling method - Google Patents
Well bottom foaming foam drilling method Download PDFInfo
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- CN104131796A CN104131796A CN201410394970.4A CN201410394970A CN104131796A CN 104131796 A CN104131796 A CN 104131796A CN 201410394970 A CN201410394970 A CN 201410394970A CN 104131796 A CN104131796 A CN 104131796A
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Abstract
The invention discloses a well bottom foaming foam drilling method. According to the method, a foam generator used for conventional foam drilling is placed at the bottom of a drill pipe, i.e., the top of a drill bit, so that foam can be generated at the well bottom, foam liquid pumped by a foam pump can enter an annular space formed between the inner wall of the double-wall drill pipe and the outer wall of the double-wall drill pipe through a double-passage air and water faucet to reach the foam generator arranged at the bottom of the drill pipe; compressed air enters an inner center passage of the double-wall drill pipe through the double-passage air and water faucet to reach the foam generator; foam liquid and compressed air are sufficiently mixed in the foam generator to generate foam; and the generated foam can carry rock fragments to return to the ground surface from the annular gap formed between the outer wall of the double-wall drill pipe and the well wall, so that the whole drilling flushing liquid circulation process is completed. The well bottom foaming foam drilling method provided by the invention has the advantages that the foam is generated at the well bottom; the breaking of the foam in the flowing process is prevented; the best quality of the foam at the well bottom is ensured; pure foam liquid and compressed air are injected into the well bottom; the flowing resistance is small; and the drilling cost is low.
Description
Technical field
The present invention relates to a kind of foam drilling method, particularly a kind of foam drilling method foaming in shaft bottom.
Background technology
Foam drilling technology be a kind of new, for tackling the drilling technology of special self-heating geographical conditions, complicated geological conditions.It utilizes the circulatory mediator of uniform and stable foam stream as drilling well, due to the feature of himself, it has overcome the shortcoming of high density drilling fluid, has also overcome atomization simultaneously and has crept into and the shortcoming of air drilling, has effectively solved the drilling technology difficult problem in drought and water shortage areas such as deserts.Because its density is low, in fragmentation, cranny development stratum, low pressure reservoir, be widely used simultaneously; The upward velocity of foam is low.Souring to the borehole wall is little, and dimension, easily caving in, in stratum that cementing properties is poor, can effectively prevent the generation of drilling accident.
The foam ganerating unit that foam drilling is used and supporting ground installation mainly comprise foam solution case, foam pump, air compressor, foam maker and corresponding supporting pipelines, foam solution and the compressed air of foam pump suction mix in the foam maker on ground, foam generated after mixing, foam is delivered in well by drilling rod, completes the cyclic process of foam.In the process of foam drilling, often need foam pump and the air compressor of elevated pressures or use Foam if will complete the cyclic process of foam.
Summary of the invention
The object of this invention is to provide a kind of shaft bottom frothing foam boring method.
It is drill bit top that the foam maker that the present invention uses conventional foam drilling is positioned over drilling rod bottom, core-drilling if, foam maker is placed on basket top, can make like this foam generate in shaft bottom, ground installation includes foam solution case, foam pump and air compressor and supporting pipelines, and the annulus that the foam solution of foam pump suction enters an ancient piece of jade, round, flat and with a hole in its centre and double-wall drill pipe outer wall in double-wall drill pipe by binary channels air water tap is until the foam maker of drilling rod bottom; And the interior central passage that compressed air enters double-wall drill pipe by binary channels air water tap is until foam maker; Foam solution and compressed air fully mix and foam generated in foam maker, and the foam of the generation annular gap of portability landwaste between double-wall drill pipe outer wall and the borehole wall returns to earth's surface, thereby completes whole wellbore flushing liquid cyclic process; The compressed air inlet place of described foam maker is provided with compressed air one way valve, and the foam solution entrance of foam maker is provided with foam solution one way valve, prevents that compressed air and foam solution from entering square channel.
The difference of the present invention and conventional foam drilling method and advantage:
(1) foam of the present invention generates in shaft bottom, with conventional foam drilling, foam maker being placed on to ground compares, reduce the flow process of foam from ground to shaft bottom, thereby prevent the situations such as foam breaks in this flow process and affected foam quality, ensured that foam is best in quality in the time of shaft bottom.
(2) the flowage friction resistance of foam in drilling rod is larger, so often need foam pump and the air compressor of elevated pressures or use foam booster pump to carry out the injection of foam in conventional foam drilling process, causing higher cost and drilling depth to be subject to larger restriction.And simple compressed air of the present invention or the simple foam solution flow resistance in drilling rod than foam the flow resistance in drilling rod much smaller, so foam maker is placed on to shaft bottom, avoid foam to be injected into the flow process at the bottom of hole from ground, can greatly reduce the injection pressure of air compressor and foam pump, can complete the conventional foam drilling equipment drilling depth that is beyond one's reach if re-use supercharging device.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
The local enlarged diagram in foam maker top that Fig. 2 uses for invention.
Detailed description of the invention
Refer to shown in Fig. 1, it is drill bit 10 tops that the foam maker 9 that the present invention uses conventional foam drilling is positioned over drilling rod bottom, core-drilling if, foam maker 9 is placed on basket top, can make like this foam generate in shaft bottom, ground installation has foam solution case, foam pump and air compressor and supporting pipelines, and the annulus that the foam solution 2 of foam pump suction enters an ancient piece of jade, round, flat and with a hole in its centre 5 and double-wall drill pipe outer wall 4 in double-wall drill pipe by binary channels air water tap 3 is until the foam maker 7 of drilling rod bottom; And the interior central passage 6 that compressed air 1 enters double-wall drill pipe by binary channels air water tap 3 is until foam maker 7; Foam solution 2 and compressed air 1 fully mix and foam generated in foam maker 7, and the foam of the generation annular gap of portability landwaste between double-wall drill pipe outer wall 4 and the borehole wall 8 returns to earth's surface 12, thereby completes whole wellbore flushing liquid cyclic process; As depicted in figs. 1 and 2, the compressed air inlet place of described foam maker 7 is provided with compressed air one way valve 9, and the foam solution entrance of foam maker 7 is provided with foam solution one way valve 11, prevents that compressed air 1 and foam solution 2 from entering square channel.
Claims (2)
1. a shaft bottom frothing foam boring method, the method is: it is drill bit (10) top that foam maker (9) is positioned over to drilling rod bottom, if drilling rod is the drilling rod of coring, foam maker (9) is placed on basket top, can make like this foam generate in shaft bottom, ground installation includes foam solution case, foam pump and air compressor and supporting pipelines, the annulus that the foam solution (2) of foam pump suction enters the interior ancient piece of jade, round, flat and with a hole in its centre (5) of double-wall drill pipe and double-wall drill pipe outer wall (4) by binary channels air water tap (3) is until the foam maker (7) of drilling rod bottom, and the interior central passage (6) that compressed air (1) enters double-wall drill pipe by binary channels air water tap (3) is until foam maker (7), foam solution (2) and compressed air (1) fully mix and foam generated in foam maker (7), the foam generating the annular gap of portability landwaste between double-wall drill pipe outer wall (4) and the borehole wall (8) returns to earth's surface (12), thereby completes whole wellbore flushing liquid cyclic process.
2. a kind of shaft bottom according to claim 1 frothing foam boring method, it is characterized in that: the compressed air inlet place of described foam maker (7) is provided with compressed air one way valve (9), the foam solution entrance of foam maker (7) is provided with foam solution one way valve (11), prevents that compressed air (1) and foam solution (2) from entering square channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394970.4A CN104131796A (en) | 2014-08-12 | 2014-08-12 | Well bottom foaming foam drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394970.4A CN104131796A (en) | 2014-08-12 | 2014-08-12 | Well bottom foaming foam drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104131796A true CN104131796A (en) | 2014-11-05 |
Family
ID=51804632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410394970.4A Pending CN104131796A (en) | 2014-08-12 | 2014-08-12 | Well bottom foaming foam drilling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104131796A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533326A (en) * | 2014-12-29 | 2015-04-22 | 吉林大学 | Low temperature air-foam drilling method |
| CN104675352A (en) * | 2014-12-29 | 2015-06-03 | 吉林大学 | Low-temperature air foam drilling device and method |
| CN111577177A (en) * | 2020-04-22 | 2020-08-25 | 中煤科工集团西安研究院有限公司 | Drilling device and drilling method for discharging slag by underground pneumatic impact crushed rock foam |
| CN111636824A (en) * | 2020-06-18 | 2020-09-08 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045336A1 (en) * | 2003-08-29 | 2005-03-03 | Kirby Hayes | Propellant treatment and continuous foam removal of well debris |
| RU2268985C2 (en) * | 2004-03-11 | 2006-01-27 | Общество с ограниченной ответственностью "Научно-производственная Компания "РАНКО" | Plant for well drilling and well face cleaning with foam |
| CN102305055A (en) * | 2011-08-10 | 2012-01-04 | 中国石油天然气股份有限公司 | Air foam flooding shaft bottom foaming process pipe column |
| CN202266253U (en) * | 2011-10-13 | 2012-06-06 | 张成海 | Air foam drilling simulation test device |
| CN103195372A (en) * | 2013-04-24 | 2013-07-10 | 中国水电顾问集团中南勘测设计研究院 | Spiral drill bit, foam drilling device and foam drilling process |
| CN203684210U (en) * | 2013-12-20 | 2014-07-02 | 中国一冶集团有限公司 | Secondary hole cleaning device for bottom of bored pile |
-
2014
- 2014-08-12 CN CN201410394970.4A patent/CN104131796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045336A1 (en) * | 2003-08-29 | 2005-03-03 | Kirby Hayes | Propellant treatment and continuous foam removal of well debris |
| RU2268985C2 (en) * | 2004-03-11 | 2006-01-27 | Общество с ограниченной ответственностью "Научно-производственная Компания "РАНКО" | Plant for well drilling and well face cleaning with foam |
| CN102305055A (en) * | 2011-08-10 | 2012-01-04 | 中国石油天然气股份有限公司 | Air foam flooding shaft bottom foaming process pipe column |
| CN202266253U (en) * | 2011-10-13 | 2012-06-06 | 张成海 | Air foam drilling simulation test device |
| CN103195372A (en) * | 2013-04-24 | 2013-07-10 | 中国水电顾问集团中南勘测设计研究院 | Spiral drill bit, foam drilling device and foam drilling process |
| CN203684210U (en) * | 2013-12-20 | 2014-07-02 | 中国一冶集团有限公司 | Secondary hole cleaning device for bottom of bored pile |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533326A (en) * | 2014-12-29 | 2015-04-22 | 吉林大学 | Low temperature air-foam drilling method |
| CN104675352A (en) * | 2014-12-29 | 2015-06-03 | 吉林大学 | Low-temperature air foam drilling device and method |
| CN104533326B (en) * | 2014-12-29 | 2018-04-13 | 吉林大学 | A kind of Cryogenic air foam drilling method |
| CN111577177A (en) * | 2020-04-22 | 2020-08-25 | 中煤科工集团西安研究院有限公司 | Drilling device and drilling method for discharging slag by underground pneumatic impact crushed rock foam |
| CN111577177B (en) * | 2020-04-22 | 2022-03-22 | 中煤科工集团西安研究院有限公司 | Drilling device and drilling method for discharging slag by underground pneumatic impact crushed rock foam |
| CN111636824A (en) * | 2020-06-18 | 2020-09-08 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
| CN111636824B (en) * | 2020-06-18 | 2022-05-10 | 中煤科工集团西安研究院有限公司 | Directional drilling tool of foaming and deslagging screw rod at bottom of double-wall liquid drive hole |
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Application publication date: 20141105 |