CN1125322C - Air sac type well pressure measuring pressure transmission tube - Google Patents
Air sac type well pressure measuring pressure transmission tube Download PDFInfo
- Publication number
- CN1125322C CN1125322C CN 01135287 CN01135287A CN1125322C CN 1125322 C CN1125322 C CN 1125322C CN 01135287 CN01135287 CN 01135287 CN 01135287 A CN01135287 A CN 01135287A CN 1125322 C CN1125322 C CN 1125322C
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- tube
- pressure
- outer tube
- gas
- pressure transmission
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Abstract
The present invention discloses an air sac type pressure transmission tube for well pressure measurement, for measuring the oil well pressure in oil industry. The present invention has two technical proposals: proposal 1, the tube is provided with an outer tube which is provided with pressure transmission holes and a capillary steel tube interface, and an air sac is arranged inside the outer tube; proposal 2, the tube is provided with an outer tube and an inner tube, the outer tube or the inner tube is provided with pressure transmission holes and a capillary steel tube interface, and an air sac is arranged in the annular space between the outer tube and the inner tube. In the two technical proposals, all the air sacs are provided with release valves which are one-way valves, an underground liquid can not enter the capillary steel tube and an underground yielded gas can not be fixed with the gas in the tube of the present invention, so that the pressure measurement is accurate. Capable of being placed horizontally, the tube of the present invention can be applied to a high angle hole and a horizontal well, and the application range of measurement technology is enlarged. Meanwhile, the present invention enhances the level of oil well control and reduced the production cost.
Description
Technical field
The present invention relates to the oil production equipment of petroleum industry, particularly a kind of air sac type well pressure measuring pressure transmission tube is applicable to the oil gas well that needs testing well sub-surface pressure.
Technical background
At the exploitation scene of petroleum industry, in the measuring technology of the down-hole pressure of oil well, a kind of capillary pressure measuring technology is arranged, pressure-transmission tube is its chief component.A fine steel tube also claims capillary tubing, and the lower end links to each other with pressure-transmission tube, and the upper end links to each other with the ground pressure tester.Be filled with gas in pressure-transmission tube and capillary tubing, down-hole pressure arrives ground by gas transfer, thereby records down-hole pressure.Because pressure-transmission tube is simple in structure, processing and manufacturing voluntarily.At present, the pressure-transmission tube that generally use in the oil field has two kinds of structures, and a kind of is to be made of one deck pipe, and as triumph CYTI type pressure-transmission tube, tube wall is provided with pressure transmission hole, and its inside holds gas; Another kind of pressure-transmission tube constitutes annular space by inside and outside two-layer pipe, and as the pressure-transmission tube of triumph CYTII model, outer tube or inner tubal wall are provided with pressure transmission hole, hold gas in annular space.Capillary tubing interface and capillary tubing join, and down-hole liquid can enter in the tube from pressure transmission hole, and act on the interior gas column of tube.Above-mentioned pressure-transmission tube in use its defective is as follows: 1, leak or down-hole pressure increases substantially when capillary tubing ground one end generation gas, gas can reduce gradually in the tube, down-hole liquid can enter from the pressure transmission hole of pressure-transmission tube, can rise gradually and enter capillary tubing at last in gas one liquid interface, so just cause pressure measurement inaccurate, need liquid is produced by boasting from capillary tubing, this work meeting expends plenty of time and workload, also can blow sometimes.2, when containing gas in the output liquid of down-hole, these gases can mix with the gas that ground is blown into and cause pressure measurement inaccurate.3, when the pressure-transmission tube inclination angle during too big or horizontal positioned, gas can be overflowed from pressure transmission hole, and down-hole liquid enters pressure-transmission tube and occupies most of space from pressure transmission hole, and down-hole pressure raises when little, and down-hole liquid can enter capillary tubing through the capillary tubing interface again.The production scene needs a kind of time saving and energy saving, pressure measurement pressure-transmission tube accurately.
Summary of the invention
The objective of the invention is to make air sac type well pressure measuring pressure transmission tube, overcome the above-mentioned defective of prior art, make down-hole liquid can not enter capillary tubing, down-hole output gas can not mix with the gas in the pressure-transmission tube and can horizontal positioned.Can be used for long horizontal traverse well, horizontal well and gas well, enlarge this The Application of Technology scope.Reduce operating cost, improve test accuracy,, reduce production costs for the oil recovery management work provides accurate data.
Following technical solution can reach above-mentioned purpose:
1, air sac type well pressure measuring pressure transmission tube has outer tube, and outer tube is provided with pressure transmission hole and capillary tubing interface, and air bag is installed in outer tube.
2, air sac type well pressure measuring pressure transmission tube has outer tube and interior pipe, and outer tube or interior pipe are provided with pressure transmission hole and capillary tubing interface, and air bag is installed in the annular space of outer tube and interior pipe.
The present invention compared with prior art has following advantage: 1, down-hole liquid can not enter capillary tubing; 2, output gas in down-hole can not mix with the gas in the present invention; 3, the present invention can horizontal positioned, thereby can be applied to enlarge the range of application of this measuring technology in long horizontal traverse well and the horizontal well.4, the data of surveying accurate, improved the daily management level of oil gas well.5, owing to need not to go again the air blowing operation, reduced production cost.
Description of drawings
Accompanying drawing 1 is the structural representation of the embodiment of the invention 1.
Accompanying drawing 2 is the structural representation of the embodiment of the invention 2.
Embodiment
Embodiment 1: 1 couple of the present invention does further detailed description below in conjunction with accompanying drawing, and air sac type well pressure measuring pressure transmission tube has outer tube 2, and outer tube 2 is provided with pressure transmission hole 4 and capillary tubing interface 1, and air bag 3 is installed in outer tube 2.Air bag 3 usefulness flexible materials are made, as: rubber, rubber add resilient material, rubber adds fibre etc., and the opening of air bag 3 communicates with capillary tubing interface 1.The wall portion of air bag 3 is provided with gas bleed valve 5, and this valve is a retaining valve, gas can only be overflowed from air bag 3, and outside liquid can not enter outside air bag 3.Capillary tubing interface 1 of the present invention is connected with capillary tubing, the pressure measurement position in the well, because of the wall portion of air bag 3 is provided with gas bleed valve 5, when air bag 3 internal gas pressures were higher than external pressure, gas will be overflowed from gas bleed valve 5.Because of gas bleed valve 5 is retaining valves, the liquid that can not of air bag 3 outsides enters air bag 3 from this valve.Down-hole pressure acts on the air bag 3 through pressure transmission hole 4, and air bag 3 deforms, and reaches internal and external pressure balance.So down-hole liquid can not enter capillary tubing, and down-hole output gas can not mix with the gas in the present invention.And the present invention can horizontal positioned, can be applied in long horizontal traverse well and the horizontal well, has enlarged the range of application of this measuring technology.
Embodiment 2: 2 couples of the present invention do further detailed description below in conjunction with accompanying drawing, air sac type well pressure measuring pressure transmission tube, have outer tube 2 and interior pipe 6, be provided with pressure transmission hole 4 and capillary tubing interface 1 on the outer tube 2 or on interior pipe 6, accompanying drawing 2 is illustrated as pressure transmission hole 4 and capillary tubing interface 1 is set on outer tube 2.Air bag 3 is installed in the annular space of outer tube 2 and interior pipe 6.The opening of air bag 3 communicates with capillary tubing interface 1.Air bag 3 usefulness flexible materials are made, as: rubber, rubber add resilient material, rubber adds fibre etc., and Qi Bibu is provided with gas bleed valve 5, and this valve is a retaining valve.Gas can only be overflowed from air bag 3, and outside liquid can not enter outside air bag 3.Capillary tubing interface 1 of the present invention is connected with capillary tubing, pressure measurement position in the well, because of the wall portion of air bag 3 is provided with gas bleed valve 5, when air bag 3 internal gas pressures were higher than external pressure, gas will be overflowed from gas bleed valve 5.Because of gas bleed valve 5 is retaining valves, the liquid that can not of air bag 3 outsides enters air bag 3 from this valve.Down-hole pressure acts on the air bag 3 through pressure transmission hole 4, and air bag 3 deforms, and reaches internal and external pressure balance.So down-hole liquid can not enter capillary tubing, and down-hole output gas can not mix with the gas in the present invention, makes institute's measuring pressure accurate.Can horizontal positioned because of the present invention, can be applied to enlarge the range of application of this measuring technology in long horizontal traverse well and the horizontal well.
Claims (3)
1, air sac type well pressure measuring pressure transmission tube, has outer tube (2), outer tube (2) is provided with pressure transmission hole (4) and capillary tubing interface (1), it is characterized in that in outer tube (2), installing air bag (3), the opening of air bag (3) communicates with capillary tubing interface (1), its wall portion is provided with gas bleed valve (5), and this valve is a retaining valve.
2, air sac type well pressure measuring pressure transmission tube, have outer tube (2) and interior pipe (6), outer tube (2) is gone up or interior pipe (6) is provided with pressure transmission hole (4) and capillary tubing interface (1), it is characterized in that air bag (3) is installed in the annular space of outer tube (2) and interior pipe (6), the opening of air bag (3) communicates with capillary tubing interface (1), its wall portion is provided with gas bleed valve (5), and this valve is a retaining valve.
3. air sac type well pressure measuring pressure transmission tube according to claim 1 and 2 is characterized in that air bag (3) makes of flexible material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135287 CN1125322C (en) | 2001-12-14 | 2001-12-14 | Air sac type well pressure measuring pressure transmission tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135287 CN1125322C (en) | 2001-12-14 | 2001-12-14 | Air sac type well pressure measuring pressure transmission tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1352383A CN1352383A (en) | 2002-06-05 |
| CN1125322C true CN1125322C (en) | 2003-10-22 |
Family
ID=4673096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01135287 Expired - Fee Related CN1125322C (en) | 2001-12-14 | 2001-12-14 | Air sac type well pressure measuring pressure transmission tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1125322C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410487C (en) * | 2006-07-28 | 2008-08-13 | 大庆油田有限责任公司 | Under well pressure measuring device |
| CN101787881B (en) * | 2009-12-30 | 2013-06-05 | 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 |
| CN102587853B (en) * | 2012-01-13 | 2014-09-10 | 中国海洋石油总公司 | Pressure compensating device |
| CN103643944B (en) * | 2013-11-20 | 2016-08-10 | 中国科学院力学研究所 | A kind of coal seam capillary tube test pressure transfering appts |
-
2001
- 2001-12-14 CN CN 01135287 patent/CN1125322C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1352383A (en) | 2002-06-05 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |