CN103742107A - Downhole mechanical switching valve for coal-bed gas well testing - Google Patents
Downhole mechanical switching valve for coal-bed gas well testing Download PDFInfo
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- CN103742107A CN103742107A CN201410024811.5A CN201410024811A CN103742107A CN 103742107 A CN103742107 A CN 103742107A CN 201410024811 A CN201410024811 A CN 201410024811A CN 103742107 A CN103742107 A CN 103742107A
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Abstract
The invention belongs to the technical field of coal-bed gas well testing, and particularly relates to a downhole mechanical switching valve for coal-bed gas well testing. The downhole mechanical switching valve can be applied to injection type well testing and withdrawal type well testing, and realizes down-hole well opening and closing accurately. The downhole mechanical switching valve comprises a switching valve body which is hollow cylinder, a joint body is connected on the outer wall of the lower portion of the switching valve body, a valve body is arranged in the joint body, a support sleeve is arranged between the valve body and the joint body, a gland is arranged in the switching valve body, a spool in the valve body is penetratingly arranged in the switching valve body and the joint body, a spring is arranged between the gland and the spool, a fishing neck is arranged on the upper portion of the spool, and rubber rings are arranged between the spool and the valve body as well as between the spool and the gland.
Description
One, technical field:
The invention belongs to coalbed gas logging technical field, be specifically related to a kind of coal bed gas well well testing down-hole mechanical switch valve.
Two, background technology:
At present, coalbed gas logging method mainly contains pouring-in and output formula.
Pouring-in well testing is a kind of drop of pressure test, is mainly to rely on ground high-pressure pump injection system to coal seam, to inject fluid after a period of time, and downhole closing obtains pressure drop data; The well testing of output formula is a kind of pressure buildup test, is mainly by certain means, and after coal seam produced fluid a period of time, downhole closing obtains pressure and recovers data.Wherein downhole closing technology and underground switch well valve are to be related to well testing test data to get and entirely get accurate key factor.
Present stage is while carrying out pouring-in well testing to coal seam, be to rely on to throw shut-in valve, completes downhole closing on the extremely present joint of closing well valve seat; By above carrying, under shut-in valve completed well, drive a well.When the well testing of output formula is carried out in coal seam, by formation tester put-on and delegated or rotation tubing string are realized downhole closing, driven a well.
In practical operation, usually there is following problem in the shut-in valve of pouring-in well testing and seat joint: if shut-in valve is too far away with the relative distance of seat joint, will affects drop of pressure data, thereby have influence on the analysis result to reservoir during downhole closing; The balance valve pocket of shut-in valve is easily out of shape, maintenance, maintenance inconvenience; The shut-in valve of pouring-in well testing and seat joint are not suitable with and the well testing of output formula.
While carrying out the well testing of output formula in coal seam, existing downhole closing mode shows many problems that are difficult to overcome: during put-on and delegated formation tester switch well, because coal seam is generally more shallow, tubing string suspending weight is lighter, switch well is not obvious, causes maloperation, causes well testing test crash; Put-on and delegated tubing string switch well, easily causes on whole pipe string and alters, moves down, and causes test data abnormal; Rotation tubing string down-hole drives a well, during closing well, often well head has rotated through certain angle, but its effect of underground switching valve, switch well is not obvious.
Three, summary of the invention:
The present invention, in order to solve the weak point in above-mentioned background technology, provides a kind of coal bed gas well well testing down-hole mechanical switch valve, and it can be applied to pouring-in well testing and the well testing of output formula, accurately realizes underground switch well.
For achieving the above object, the technical solution used in the present invention is: a kind of coal bed gas well well testing down-hole mechanical switch valve, comprise switch valve body, the cylinder that described switch valve body is hollow, it is characterized in that: on the bottom outer wall of described switch valve body, be connected with fittings body, in described fittings body, be provided with valve body, between valve body and fittings body, be provided with care set, in described switch valve body, be provided with gland, spool in described valve body is arranged in switch valve body and fittings body, between described gland and spool, be provided with spring, the top of described spool is provided with fishing neck, between described spool and valve body and gland, be provided with rubber ring.
The internal diameter of described fittings body is not less than 60mm; The internal diameter of switch valve body is not less than 50mm; The diameter of spool is not more than 18mm.
Described fittings body and switch valve body are threaded connection.
Described care set and valve body and fittings body are threaded connection.
Described switch valve body and gland are threaded connection.
Described rubber ring is O type rubber ring.
Compared with prior art, the present invention has advantage and effect are as follows:
1, without complicated frame for movement, simple in structure, easy to operate, prolonged difficult using;
2, switch valve is threaded with test string, only need to just accurately under completed well, drive a well with wire rope put-on and delegated throw in catcher, closing well action;
3, meet the pouring-in well testing of coal bed gas well and the underground switch well technical requirements of output formula well testing simultaneously;
4, can pass through the medium fluids such as oil, gas, water, mud;
5, can realize repeatedly, long-time switch well;
6, be applicable to drillstem test, open hole test, sleeve pipe test.
Four, accompanying drawing explanation:
Fig. 1 is switch valve top plan view;
Fig. 2 is switch valve sectional drawing-closed condition;
Fig. 3 is switch valve sectional drawing-opening;
Reference numeral: 1-fittings body; 2-valve body; 3-spool; 4-gland; 5-body; 6-fishing neck; 7-spring; 8-O type circle; 9-care set.
Five, the specific embodiment:
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Referring to Fig. 1-Fig. 3: a kind of coal bed gas well well testing down-hole mechanical switch valve, comprise switch valve body 5, the cylinder that described switch valve body 5 is hollow, the bottom outer wall of described switch valve body 5 has been threaded connection fittings body 1, in described fittings body 1, be provided with valve body 2, between valve body 2 and fittings body 1, by screw thread, be provided with care set 9, in described switch valve body 5, by screw thread, be provided with gland 4, spool 3 in described valve body 2 is arranged in switch valve body 5 and fittings body 1, between described gland 4 and spool 3, be provided with spring 7, the top of described spool 3 is provided with fishing neck 6, between described spool 3 and valve body 2 and gland 4, be provided with O type rubber ring 8.
The internal diameter of described fittings body 1 is not less than 60mm; The internal diameter of switch valve body 5 is not less than 50mm; The diameter of spool 3 is not more than 18mm, adopts the sealing of O type circle, and integrated carrying pressure is not less than 35MPa; The medium fluids such as oil, gas, water, mud be can pass through, drilling well drillstem test, open hole test and completion casing build-in test are applicable to;
The present invention adopts built-in spring 7 compacting spools 3, makes switch valve body 5 in normal off status; Between spool 3 and valve body 2, gland 4, adopt the seal with elastometic washer of O type;
Switch valve body 5 of the present invention is threadedly connected on test string, at the effect bottom spool 3 of built-in spring 7, is normal off status, by transferring throw in catcher, catches on spool fishing neck 6 and has carried breakdown action.
Pouring-in well testing is described with reference to the accompanying drawings:
1, switch valve, as for packer bottom, is gone into the well to precalculated position with test string, has test water in test string, to fill in the process of going into the well;
If 2 adopt support type packer or rotary packer, after packer setting, with wire rope, transferring throw in catcher catches to carry on spool fishing neck and opens valve and just can inject well testing, fluid is the gap with gland 4 through switch valve body 5, to the gap of gland 4 with spool 3, gap to fittings body 1 with valve body 2, flows to coal seam; Transferring spool just can closing well pressure drop;
If 3 adopt inner intumescence type packer, switch valve can be used as the expansible stopper of packer, after packer setting, with wire rope, transferring throw in catcher catches to carry on spool fishing neck and opens valve and just can inject well testing, fluid is the gap with gland 4 through switch valve body 5, to the gap of gland 4 with spool 3, gap to fittings body 1 with valve body 2, flows to coal seam; Transferring spool just can closing well pressure drop.
The well testing of output formula is described with reference to the accompanying drawings:
1, packer must use outer inflatable packer during the well testing of output formula, and switch valve can, as for packer top, be also empty in tubing string in the process of going into the well as for packer bottom all the time;
2, after packer setting, with wire rope, transferring throw in catcher catches on spool fishing neck and carries and open valve, under the effect of coal seam pressure, fluid is through the gap of fittings body 1 and valve body 2, to the gap of gland 4 with spool 3, the gap to body 5 with gland 4, finally arrives ground through tubing string.Transferring spool just can shut-in pressure recover.
Claims (6)
1. a coal bed gas well well testing down-hole mechanical switch valve, comprise switch valve body (5), the cylinder that described switch valve body (5) is hollow, it is characterized in that: on the bottom outer wall of described switch valve body (5), be connected with fittings body (1), in described fittings body (1), be provided with valve body (2), between valve body (2) and fittings body (1), be provided with care set (9), in described switch valve body (5), be provided with gland (4), spool (3) in described valve body (2) is arranged in switch valve body (5) and fittings body (1), between described gland (4) and spool (3), be provided with spring (7), the top of described spool (3) is provided with fishing neck (6), between described spool (3) and valve body (2) and gland (4), be provided with rubber ring (8).
2. coal bed gas well well testing down-hole mechanical switch valve according to claim 1, is characterized in that: the internal diameter of described fittings body (1) is not less than 60mm; The internal diameter of switch valve body (5) is not less than 50mm; The diameter of spool (3) is not more than 18mm.
3. coal bed gas well well testing down-hole mechanical switch valve according to claim 1 and 2, is characterized in that: described fittings body (1) is threaded connection with switch valve body (5).
4. coal bed gas well well testing down-hole mechanical switch valve according to claim 3, is characterized in that: described care set (9) is threaded connection with valve body (2) and fittings body (1).
5. coal bed gas well well testing down-hole mechanical switch valve according to claim 4, is characterized in that: described switch valve body (5) is threaded connection with gland (4).
6. coal bed gas well well testing down-hole mechanical switch valve according to claim 5, is characterized in that: described rubber ring (8) is O type rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024811.5A CN103742107B (en) | 2014-01-20 | 2014-01-20 | Coal bed gas well well testing down-hole mechanical switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024811.5A CN103742107B (en) | 2014-01-20 | 2014-01-20 | Coal bed gas well well testing down-hole mechanical switch valve |
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| Publication Number | Publication Date |
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| CN103742107A true CN103742107A (en) | 2014-04-23 |
| CN103742107B CN103742107B (en) | 2016-04-06 |
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| CN201410024811.5A Active CN103742107B (en) | 2014-01-20 | 2014-01-20 | Coal bed gas well well testing down-hole mechanical switch valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234503Y (en) * | 1995-06-27 | 1996-09-04 | 宝鸡石油机械厂 | Sliding sleeve balance circular pressure controlled ball test valve |
| CN201190552Y (en) * | 2008-04-02 | 2009-02-04 | 毛万里 | Mechanically controlled multi-time on-off valve |
| CN201474666U (en) * | 2009-08-20 | 2010-05-19 | 新疆华油油气工程有限公司 | Underground ball throwing control switch valve |
| CN102400660A (en) * | 2010-09-10 | 2012-04-04 | 中国石油化工股份有限公司华东分公司采油厂 | Underground switch well valve for test device of coal bed gas well |
| CN102454811A (en) * | 2011-10-06 | 2012-05-16 | 张周卫 | Pipeline built-in decompressing throttling valve for low-temperature system |
| US20130000917A1 (en) * | 2010-03-19 | 2013-01-03 | Noetic Technologies Inc. | Casing fill-up fluid management tool |
| CN103061707A (en) * | 2011-10-21 | 2013-04-24 | 中国石油天然气股份有限公司 | Cycling switch valve under well |
| CN203756122U (en) * | 2014-01-20 | 2014-08-06 | 中煤科工集团西安研究院有限公司 | Coal-bed gas well testing underground mechanical switching valve |
-
2014
- 2014-01-20 CN CN201410024811.5A patent/CN103742107B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2234503Y (en) * | 1995-06-27 | 1996-09-04 | 宝鸡石油机械厂 | Sliding sleeve balance circular pressure controlled ball test valve |
| CN201190552Y (en) * | 2008-04-02 | 2009-02-04 | 毛万里 | Mechanically controlled multi-time on-off valve |
| CN201474666U (en) * | 2009-08-20 | 2010-05-19 | 新疆华油油气工程有限公司 | Underground ball throwing control switch valve |
| US20130000917A1 (en) * | 2010-03-19 | 2013-01-03 | Noetic Technologies Inc. | Casing fill-up fluid management tool |
| CN102400660A (en) * | 2010-09-10 | 2012-04-04 | 中国石油化工股份有限公司华东分公司采油厂 | Underground switch well valve for test device of coal bed gas well |
| CN102454811A (en) * | 2011-10-06 | 2012-05-16 | 张周卫 | Pipeline built-in decompressing throttling valve for low-temperature system |
| CN103061707A (en) * | 2011-10-21 | 2013-04-24 | 中国石油天然气股份有限公司 | Cycling switch valve under well |
| CN203756122U (en) * | 2014-01-20 | 2014-08-06 | 中煤科工集团西安研究院有限公司 | Coal-bed gas well testing underground mechanical switching valve |
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| CN103742107B (en) | 2016-04-06 |
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