CN103643941A - Pressure transferring cylinder for testing coalbed methane capillary tube - Google Patents
Pressure transferring cylinder for testing coalbed methane capillary tube Download PDFInfo
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- CN103643941A CN103643941A CN201310589283.3A CN201310589283A CN103643941A CN 103643941 A CN103643941 A CN 103643941A CN 201310589283 A CN201310589283 A CN 201310589283A CN 103643941 A CN103643941 A CN 103643941A
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Abstract
The invention discloses a pressure transferring cylinder for testing a coalbed methane capillary tube. The pressure transferring cylinder comprises an intermediate oil tube, an annulus outer tube, a one-way constant pressure difference breakover valve and a capillary tube port, wherein the intermediate oil tube is connected with a central oil tube used for coalbed methane drainage through an upper coupling and a lower coupling; the annulus outer tube is arranged on the intermediate oil tube in a sleeved mode; the one-way constant pressure difference breakover valve is arranged on the bottom of the annulus outer tube; the capillary tube port is arranged in the top of the annulus outer tube. The intermediate oil tube connected with the central oil tube used for coalbed methane drainage is arranged, the annulus outer pipe with a fixed annulus space is arranged on the intermediate oil tube in the sleeved mode, the one-way constant pressure difference breakover valve is arranged on the bottom of the annulus outer tube, and the capillary tube port is arranged in the top of the annulus outer tube, so the pressure transferring cylinder can be installed at any positions of the oil tube subjected to coalbed methane drainage, multiple pressure transferring cylinders can be installed at the same time, and the pressure transferring cylinder is used when pressure testing is carried out at the installation positions. The pressure transferring cylinder is not only simple in structure but also convenient to use.
Description
Technical field
The present invention relates to a kind of capillary tube test pressure-transmission tube for coal bed gas.
Background technology
The production of coal bed gas well adopts drainage and step-down gas production mode to carry out, and oil pipe draining oil jacket space, center aerogenesis, has basic difference with the center oil pipe produce hydrocarbons of conventional gas and oil.In coal bed gas manufacturing process, need to measure the pressure in aerogenesis coal seam, especially the pressure in the coal seam of each pay interval of the mixed coal bed gas well of adopting of multilayer is measured.At present, conventional method is that echometer is tested, and not only workload is large, and can only understand a liquid level, and aerogenesis occurs after foam section, cannot obtain Measurement accuracy value.The cost of manometry is high again, therefore utilize capillary tube test and convenient practical again, and cost of production is low.
Capillary tube test is one of core component of capillary tube test with pressure-transmission tube, the conventional gas and oil test institute capillary tube that adopts is due to the capillary pressure-transmission barrel being used in combination with it heaviness comparatively all, comparatively loaded down with trivial details with relevant connection in removing process at every turn, and the annular space of oil pipe and sleeve pipe is diminished, this has brought very big difficulty to follow-up production logging, even can not carry out other production test.
In addition, the test of conventional gas and oil capillary tube adopts the structures such as ball valve, cutting nail+piston or dicyclo sky with the design of pressure-transmission tube more, and not only manufacturing cost is high, and accident rate is high.The present invention is according to the production feature of coal bed gas well, and invention is another kind of controls the sealing of going into the well in process, the capillary pressure measuring cylinder of one-way conduction under particular pressure differential with the poor conducting valve of one-direction pressure-fixed.This invention can be in same well diverse location install, because middle oil pipe and coal bed gas well Chan Shui center oil pipe match, therefore, both can obtain the pressure of different coal gas payzone, the while does not affect again the carrying out of normal production.
Summary of the invention
The problem existing for prior art, the object of the present invention is to provide a kind of coal bed gas capillary tube test pressure-transmission tube, and not only structure is simpler, uses also more convenient.
A kind of coal bed gas capillary tube test of the present invention comprises with pressure-transmission tube:
Middle oil pipe, by upper and lower box cupling with for coal bed gas draining Yong center oil pipe, be connected;
Annular space outer tube, is set on middle oil pipe;
The poor conducting valve of one-direction pressure-fixed, is arranged on the bottom of described annular space outer tube;
Capillary interface, is arranged on the top of described annular space outer tube.
The present invention is by arranging and the middle oil pipe being connected for coal bed gas draining Yong center oil pipe, and on middle oil pipe the sheathed annular space outer tube with certain annular space space, annular space outer tube bottom arranges the poor conducting valve of one-direction pressure-fixed, annular space cover top arranges capillary interface, so just can the optional position of the oil pipe of coal seam draining will be arranged on, can be a plurality of install simultaneously, and then use while carrying out pressure test in installation site, not only simple in structure but also easy to use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
As shown in Figure 1, a kind of coal bed gas capillary tube test of the present invention comprises with pressure-transmission tube: middle oil pipe 1, annular space outer tube 2, the poor conducting valve 3 of one-direction pressure-fixed and capillary interface 4.Middle oil pipe 1 by upper box cupling 5 and lower box cupling 6 with for coal bed gas draining Yong center oil pipe, be connected.Because middle oil pipe 1 is the pipe of the same size with the center oil pipe of draining, so just can as required the present invention be arranged on to the precalculated position of oil pipe and lower to preposition, and not be subject to the constraint of installation site.For example, can be arranged on the top of the installation tubing pump of oil pipe, can be also in the bottom that tubing pump is installed, and a plurality of pressure-transmission tubes can be installed simultaneously.
Annular space outer tube 2 is set on middle oil pipe 1.The internal diameter of annular space outer tube 2 is larger than the external diameter of middle oil pipe 1, so just can form the annular space of certain space.In addition, the upper and lower end face of annular space outer tube 2, except the poor conducting valve of following capillary interface and one-direction pressure-fixed is installed, all forms closed structure.
The poor conducting valve 3 of one-direction pressure-fixed is arranged on the bottom of annular space outer tube 2, and capillary interface 4 is arranged on the top of annular space outer tube 2.
Like this, when pressure-transmission tube of the present invention is arranged on oil pipe by upper and lower box cupling 5,6, the capillary tube of capillary pressure force test system is installed on capillary interface 4, and along with oil pipe is transferred and down under coal seam.While instantly arriving precalculated position, by external purging system, from capillary tube, be blown into nitrogen, the air of capillary tube, annular space outer tube 2 is all blown by the poor conducting valve 3 of one-direction pressure-fixed.Shut-down purge system, is conducted pressure testing system and capillary tube.Now, because the pressure at the poor conducting valve of one-direction pressure-fixed 3 places of pressure-transmission tube is identical with external water pressure, by capillary tube, just pressure can be returned like this, thereby just can measure easily the coal seam pressure of this position by pressure testing system.
In addition, according to test request, can a plurality of pressure-transmission tubes of the present invention be installed at different test positions, and be connected with capillary tube with many, measure the pressure in different aerogenesis coal seam simultaneously.
The present invention is by arranging and the middle oil pipe 1 being connected for coal bed gas draining Yong center oil pipe, and on middle oil pipe 1 the sheathed annular space outer tube 2 with certain annular space space, annular space outer tube 2 bottoms arrange the poor conducting valve 3 of one-direction pressure-fixed, annular space outer tube 2 tops arrange capillary interface 4, like this, just the present invention can be arranged on to the optional position of the oil pipe of coal seam draining, and then use when pressure test is carried out in this position, not only simple in structure but also easy to use.
Claims (1)
1. a coal bed gas capillary tube test pressure-transmission tube, is characterized in that, comprising:
Middle oil pipe, by upper and lower box cupling with for coal bed gas draining Yong center oil pipe, be connected;
Annular space outer tube, is set on middle oil pipe;
The poor conducting valve of one-direction pressure-fixed, is arranged on the bottom of described annular space outer tube;
Capillary interface, is arranged on the top of described annular space outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589283.3A CN103643941A (en) | 2013-11-20 | 2013-11-20 | Pressure transferring cylinder for testing coalbed methane capillary tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589283.3A CN103643941A (en) | 2013-11-20 | 2013-11-20 | Pressure transferring cylinder for testing coalbed methane capillary tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103643941A true CN103643941A (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310589283.3A Pending CN103643941A (en) | 2013-11-20 | 2013-11-20 | Pressure transferring cylinder for testing coalbed methane capillary tube |
Country Status (1)
| Country | Link |
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| CN (1) | CN103643941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485871A (en) * | 2020-04-15 | 2020-08-04 | 煤炭科学技术研究院有限公司 | Pressure transmission cylinder for steady-flow anti-blocking test of capillary tube of coal-bed gas well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2451735Y (en) * | 2000-11-03 | 2001-10-03 | 中国石油天然气股份有限公司 | Capillary down-hole pressure monitoring transmitter |
| CN2709638Y (en) * | 2004-07-02 | 2005-07-13 | 中国石化胜利油田有限公司采油工艺研究院 | Transmission cylinder for testing pressure of capillary tube |
| GB2420417A (en) * | 2004-10-15 | 2006-05-24 | Infra Scient Ltd | A capillary viscometer and method of measuring viscosity |
| CN101514627A (en) * | 2008-03-05 | 2009-08-26 | 中国科学院自动化研究所 | Remote monitoring system for oil well pressure by capillary steel pipes |
| CN101787881A (en) * | 2009-12-30 | 2010-07-28 | 天津市英源焊接技术有限公司 | Shell of nitrogen pressure-transmission tube used for oilfield and welding method thereof |
| RU2422796C1 (en) * | 2010-03-16 | 2011-06-27 | Открытое акционерное общество "Газпром" | Procedure for sampling gas-liquid medium and device for its implementation |
| CN202152678U (en) * | 2011-08-30 | 2012-02-29 | 靳涛 | Novel capillary pipe pressure transmitting cylinder device |
-
2013
- 2013-11-20 CN CN201310589283.3A patent/CN103643941A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2451735Y (en) * | 2000-11-03 | 2001-10-03 | 中国石油天然气股份有限公司 | Capillary down-hole pressure monitoring transmitter |
| CN2709638Y (en) * | 2004-07-02 | 2005-07-13 | 中国石化胜利油田有限公司采油工艺研究院 | Transmission cylinder for testing pressure of capillary tube |
| GB2420417A (en) * | 2004-10-15 | 2006-05-24 | Infra Scient Ltd | A capillary viscometer and method of measuring viscosity |
| CN101514627A (en) * | 2008-03-05 | 2009-08-26 | 中国科学院自动化研究所 | Remote monitoring system for oil well pressure by capillary steel pipes |
| CN101787881A (en) * | 2009-12-30 | 2010-07-28 | 天津市英源焊接技术有限公司 | Shell of nitrogen pressure-transmission tube used for oilfield and welding method thereof |
| RU2422796C1 (en) * | 2010-03-16 | 2011-06-27 | Открытое акционерное общество "Газпром" | Procedure for sampling gas-liquid medium and device for its implementation |
| CN202152678U (en) * | 2011-08-30 | 2012-02-29 | 靳涛 | Novel capillary pipe pressure transmitting cylinder device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485871A (en) * | 2020-04-15 | 2020-08-04 | 煤炭科学技术研究院有限公司 | Pressure transmission cylinder for steady-flow anti-blocking test of capillary tube of coal-bed gas well |
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Application publication date: 20140319 |
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| RJ01 | Rejection of invention patent application after publication |