CN103742107B - Coal bed gas well well testing down-hole mechanical switch valve - Google Patents
Coal bed gas well well testing down-hole mechanical switch valve Download PDFInfo
- Publication number
- CN103742107B CN103742107B CN201410024811.5A CN201410024811A CN103742107B CN 103742107 B CN103742107 B CN 103742107B CN 201410024811 A CN201410024811 A CN 201410024811A CN 103742107 B CN103742107 B CN 103742107B
- Authority
- CN
- China
- Prior art keywords
- valve body
- switch valve
- well
- spool
- gland
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
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.It can be applied to pouring-in well testing and the well testing of output formula, accurately realizes underground switch well.The technical solution used in the present invention comprises switch valve body, described switch valve body is the cylinder of hollow, the bottom outer wall of described switch valve body is connected with fittings body, valve body is provided with in described fittings body, care set is provided with between valve body and fittings body, gland is provided with in described switch valve body, spool in described valve body is arranged in switch valve body and fittings body, spring is provided with between described gland and spool, the top of described spool is provided with fishing neck, described spool and be provided with rubber ring between valve body and 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 the test of a kind of drop of pressure, and after mainly relying on ground high-pressure pump injection system to inject fluid a period of time to coal seam, downhole closing obtains pressure drop data; The well testing of output formula is a kind of pressure buildup test, and mainly by certain means, after coal seam produced fluid a period of time, downhole closing obtains pressure recover data.Wherein downhole closing technology and underground switch well valve are related to well testing test data to get the key factor of entirely getting standard.
Present stage is when carrying out pouring-in well testing to coal seam, is to rely on to throw shut-in valve, the extremely present joint of closing well valve seat completes downhole closing; By what drive a well under above carrying shut-in valve completed well.When the well testing of output formula is carried out to coal seam, realize downhole closing by the put-on and delegated of formation tester or rotation tubing string, drive a well.
In practical operation, usually there is following problem in the shut-in valve of pouring-in well testing and seat joint: if the relative distance that shut-in valve and seat save is too far away, will affects drop of pressure data, thus 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.
When carrying out the well testing of output formula in coal seam, existing downhole closing mode shows many problems being difficult to overcome: during put-on and delegated formation tester switch well, because coal seam is general 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; Rotate tubing string down-hole drive a well, closing well time, often well head rotates through certain angle, but underground switching valve not its effect, switch well is not obvious.
Three, summary of the invention:
The present invention is in order to solve the weak point in above-mentioned background technology, and provide a kind of coal bed gas well well testing down-hole mechanical switch valve, 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, described switch valve body is the cylinder of hollow, it is characterized in that: the bottom outer wall of described switch valve body is connected with fittings body, valve body is provided with in described fittings body, care set is provided with between valve body and fittings body, gland is provided with in described switch valve body, spool in described valve body is arranged in switch valve body and fittings body, spring is provided with between described gland and spool, the top of described spool is provided with fishing neck, described spool and be provided with rubber ring between valve body and gland.
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 advantage that has of the present invention and effect as follows:
1, without complicated frame for movement, structure is simple, easy to operate, and prolonged difficulty is used;
2, switch valve is threaded with test string, only need with wire rope put-on and delegated throw in catcher just can accurately drive a well under completed well, 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, by medium fluids such as oil, gas, water, mud;
5, can realize repeatedly, long-time switch well;
6, drillstem test, open hole test, sleeve pipe test is applicable to.
Four, accompanying drawing illustrates:
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, detailed description of the invention:
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
See Fig. 1-Fig. 3: a kind of coal bed gas well well testing down-hole mechanical switch valve, comprise switch valve body 5, described switch valve body 5 is the cylinder of hollow, the bottom outer wall of described switch valve body 5 has been threaded connection fittings body 1, valve body 2 is provided with in described fittings body 1, between valve body 2 and fittings body 1, screw thread is provided with care set 9, in described switch valve body 5, screw thread is provided with gland 4, spool 3 in described valve body 2 is arranged in switch valve body 5 with in fittings body 1, spring 7 is provided with between described gland 4 and spool 3, the top of described spool 3 is provided with fishing neck 6, described spool 3 and be provided with O type rubber ring 8 between valve body 2 and gland 4.
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, and adopt the sealing of O type circle, integrated carrying pressure is not less than 35MPa; By medium fluids such as oil, gas, water, mud, be applicable to drilling well drillstem test, open hole test and completion casing build-in test;
Spool 3 of the present invention has certain shift motion in valve body 2, gland 4;
The present invention adopts built-in spring 7 to suppress spool 3, makes switch valve body 5 be in normal off status; The seal with elastometic washer of O type is adopted between spool 3 and valve body 2, gland 4;
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 in normal off status, catches on spool fishing neck 6 carried breakdown action by transferring throw in catcher.
Pouring-in well testing is described with reference to the accompanying drawings:
1, switch valve is as bottom packer, goes into the well to precalculated position with test string, has test water to fill in test string in process of going into the well;
2, according to support type packer or rotary packer, transfer throw in catcher with wire rope after packer setting to catch spool fishing neck carries and open valve and just can carry out injection well testing, fluid is through the gap of switch valve body 5 with gland 4, to gap with spool 3 of gland 4, to gap with valve body 2 of fittings body 1, flow to coal seam; Transferring spool just can closing well pressure drop;
3, according to inner intumescence type packer, switch valve can be used as the expansible stopper of packer, after packer setting, transfer throw in catcher with wire rope catch spool fishing neck carries and open valve and just can carry out injection well testing, fluid is through the gap of switch valve body 5 with gland 4, to gap with spool 3 of gland 4, to gap with valve body 2 of fittings body 1, flow 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, during the well testing of output formula, packer must use outer inflatable packer, and switch valve can as can, as packer top, be also empty in tubing string in process of going into the well bottom packer all the time;
2, transfer throw in catcher with wire rope after packer setting to catch spool fishing neck carries and open valve, at the flows by action body of coal seam pressure through fittings body 1 gap with valve body 2, to gap with spool 3 of gland 4, to the gap of body 5 with gland 4, finally arrive ground through tubing string.Transfer spool just can shut-in pressure to 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: the bottom outer wall of described switch valve body (5) is connected with fittings body (1), valve body (2) is provided with in described fittings body (1), care set (9) is provided with between valve body (2) and fittings body (1), gland (4) is provided with in described switch valve body (5), spool (3) in described valve body (2) is arranged in switch valve body (5) with in fittings body (1), spring (7) is provided with between described gland (4) and spool (3), the top of described spool (3) is provided with fishing neck (6), described spool (3) and be provided with rubber ring (8) between valve body (2) and gland (4).
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) and switch valve body (5) are threaded connection.
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) and gland (4) are threaded connection.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742107A CN103742107A (en) | 2014-04-23 |
| CN103742107B true CN103742107B (en) | 2016-04-06 |
Family
ID=50499162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410024811.5A Active CN103742107B (en) | 2014-01-20 | 2014-01-20 | Coal bed gas well well testing down-hole mechanical switch valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103742107B (en) |
Citations (7)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2547857B1 (en) * | 2010-03-19 | 2018-09-12 | Noetic Technologies Inc. | Casing fill-up fluid management tool |
-
2014
- 2014-01-20 CN CN201410024811.5A patent/CN103742107B/en active Active
Patent Citations (7)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103742107A (en) | 2014-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202544824U (en) | Concentric double-pipe hierarchical injection pipe column | |
| CN205382923U (en) | Packing sand control technology tubular column is segmented to circulate by horizontal well outside of tubes | |
| CN201671623U (en) | Leakage-finding water exclusion production string for horizontal wells | |
| CN103541700B (en) | Reverse sealed eccentric injection mandrel | |
| CN202165053U (en) | Novel hydraulic control underground sliding sleeve switch valve | |
| CN104196492B (en) | A kind of dragging down-hole plugging valve with pressure | |
| CN204827256U (en) | Seal up and adopt down screen pipe and fill sand control integration operating tool string | |
| CN202090890U (en) | Underground drill string near bit check valve | |
| CN204386576U (en) | Horizontal well in segments Intermittent cyclic steam stimulation note adopts integrated pipe column | |
| CN203420698U (en) | Well completion fracture integrated pipe column for open hole horizontal well | |
| CN206830131U (en) | A kind of water injection well sand setting constant pressure check valve | |
| CN203383783U (en) | Closed-type bottom reversing switch | |
| CN203756122U (en) | Coal-bed gas well testing underground mechanical switching valve | |
| CN101839117B (en) | Annulus safety valve | |
| CN205778740U (en) | A kind of seesaw type sliding sleeve opener and etc. diameter through sleeve sliding sleeve | |
| CN103742107B (en) | Coal bed gas well well testing down-hole mechanical switch valve | |
| CN208966275U (en) | Energy saving and environment friendly leather cup pressure release type hot wash not pressure oil layer device | |
| CN202628032U (en) | Oil sleeve annulus injection valve | |
| CN203515464U (en) | Well cementation device | |
| CN104196505B (en) | Chemical flooding layering injection device | |
| CN202132013U (en) | Underground blow-out preventing device for electric pump well | |
| CN110017127A (en) | The water integrated device of acid fracturing control, acid fracturing water control pipe column and acid fracturing water control method | |
| CN108825166A (en) | A kind of novel water injection packer | |
| CN203808915U (en) | Plugging device for oil pipe hanger | |
| CN102913159A (en) | Continuous circulation valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |