CN102383782A - Small-diameter high temperature heat-insulating pressure measuring unit - Google Patents
Small-diameter high temperature heat-insulating pressure measuring unit Download PDFInfo
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- CN102383782A CN102383782A CN2011103621965A CN201110362196A CN102383782A CN 102383782 A CN102383782 A CN 102383782A CN 2011103621965 A CN2011103621965 A CN 2011103621965A CN 201110362196 A CN201110362196 A CN 201110362196A CN 102383782 A CN102383782 A CN 102383782A
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Abstract
The invention discloses a small-diameter high temperature heat-insulating pressure measuring unit, which comprises a pressure measuring body and a pressure measuring capillary, wherein the pressure measuring body is provided with a testing pipeline channel penetrating axially; the side wall of the pressure measuring body is provided with a pressure measuring hole; one end of the pressure measuring body is provided with a pressure transfer channel along the axial direction; the pressure measuring hole is communicated with the pressure transfer channel; one end of the pressure measuring capillary is connected with the pressure measuring body; the pressure measuring capillary has a pressure measuring channel communicated with the pressure transfer channel; and the diameter of the pressure measuring channel is smaller than that of the pressure transfer channel. The small-diameter high temperature heat-insulating pressure measuring unit can accurately measure a pressure value under a viscous oil horizontal well, and the pressure measuring accuracy is high.
Description
Technical field
The present invention is relevant for a kind of pressure measuring unit, especially relevant for a kind of minor diameter high temperature insulating pressure measuring unit that is used to test the down-hole pressure of thick oil horizontal well.
Background technology
At present, SAGD steam driving exploitation technology has become a kind of fashionable technology of the ultra viscous crude of international exploitation, and it mainly is through heating oil reservoir to underground continuous steam in jection, crude oil is driven on every side in the producing well extraction then.
In oil recovery field, oil field, horizontal well gravity drives and recovers the oil is more effective thickened oil recovery technology, and SAGD multi-point temp pressure Dynamic Monitoring is the effective monitoring means that guarantees the normal operation of this technology.This technology mainly utilizes capillary tube pressure transmission principle to realize pressure test; The existing pressure dynamic monitor that is used to test thick oil horizontal well; Mainly comprise a pressure measurement pipe nipple; In the pressure measurement pipe nipple, axially offer measuring pressure passage, on the sidewall of pressure measurement pipe nipple, offer the pressure tap that is connected with measuring pressure passage, an end of pressure measurement pipe nipple links to each other with the well head pressure harvester through a capillary.When test pressure; Need this pressure measurement pipe nipple is lowered to the pressure measurement position that the horizontal well down-hole is set; Down-hole pressure is transferred to the transmission medium of measuring pressure passage in the open conduit that capillary tube forms through the pressure tap on the pressure measurement pipe nipple; Through this transmission medium down-hole pressure is transferred to the well head pressure harvester, thereby realizes the test of horizontal well down-hole pressure.
But existing pressure dynamic monitor is owing to have no in order to cover the protective device of pressure tap at the lateral wall place of pressure measurement pipe nipple; Therefore; This pressure dynamic monitor measuring pressure passage, capillary tube blocking problem occur through regular meeting and takes place after going into the well, and causing can't test pressure; In addition; Because the down-hole pressure of horizontal well is unstable, and measuring pressure passage, internal diameter capillaceous are very little, the unexpected increase of down-hole pressure or reduce to cause the pressure transmission in the capillary tube unstable; Influence the measuring accuracy of pressure, it can't satisfy the requirement of high accuracy manometric techniques such as pressure recovery; Have again, be not provided with and the coiled tubing welded structure on this pressure dynamic monitor, therefore be difficult to realize and being connected of coiled tubing, and in welding process, how to protect the cable that passes in the pressure measurement pipe nipple not receive high-temperature damage also be a difficult point problem.
Therefore, be necessary to provide a kind of new pressure measuring unit that is used to test the thick oil horizontal well down-hole pressure, overcome above-mentioned defective.
Summary of the invention
The purpose of this invention is to provide a kind of minor diameter high temperature insulating pressure measuring unit, it can accurately test the down-hole pressure value of thick oil horizontal well, and the pressure test precision is high.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The present invention provides a kind of minor diameter high temperature insulating pressure measuring unit, and said minor diameter high temperature insulating pressure measuring unit comprises:
Drueckelement offers the test line passage of axial perforation on it, on the sidewall of said drueckelement, offer pressure tap, offers the pressure transmission passage in axial direction at an end of said drueckelement, and said pressure tap is connected with said pressure transmission passage;
The pressure measurement capillary tube, the one of which end links to each other with said drueckelement, and said pressure measurement capillary tube has measuring pressure passage, and said measuring pressure passage is connected with said pressure transmission passage, and the diameter of said measuring pressure passage is less than the diameter of said pressure transmission passage.
In preferred embodiment, the diameter of said pressure transmission passage is more than the twice of said measuring pressure passage diameter.
In preferred embodiment, on the lateral wall of said drueckelement, be connected with diaphragm, said protection membrane cover is located on the said pressure tap.
In preferred embodiment, the pad of said diaphragm for processing by stainless steel material.
In preferred embodiment, said diaphragm is welded on the lateral wall place that said drueckelement is provided with said pressure tap.
In preferred embodiment, the said pressure measurement other end capillaceous is connected with the capillary tube joint.
In preferred embodiment, the two ends of said drueckelement convex with connecting portion respectively, and the diameter of said connecting portion is less than the diameter of said drueckelement, and a said pressure measurement end capillaceous is connected on the said connecting portion.
In preferred embodiment, the diameter of said drueckelement equals the diameter of coiled tubing.
In preferred embodiment, said drueckelement is processed by the 1Cr18NiTi stainless steel material.
In preferred embodiment, be filled with transmission medium in said pressure transmission passage, the said measuring pressure passage, said transmission medium is a nitrogen.
The characteristics and the advantage of minor diameter high temperature insulating pressure measuring unit of the present invention are:
One, minor diameter high temperature insulating pressure measuring unit of the present invention; The pressure tap and coupled logical pressure transmission passage, the pressure measurement measuring pressure passage capillaceous that are opened on the drueckelement sidewall form an open conduit together; In this open conduit, be filled with transmission medium; The down-hole pressure of thick oil horizontal well reaches the pressure acquisition device of well head through this transmission medium, in order to realize pressure test.Wherein, The diameter of the pressure transmission passage of drueckelement is designed to the diameter greater than pressure measurement measuring pressure passage capillaceous; Can guarantee under the certain condition of the intensity of this minor diameter high temperature insulating pressure measuring unit and length; The pressure transmission volume of corresponding expansion down-hole pressure increases pressure measurement stability, improves the pressure test precision.
Two, minor diameter high temperature insulating pressure measuring unit of the present invention is connected with diaphragm on the lateral wall of drueckelement, and this diaphragm is used for the capping pressure tap, enters in the measuring pressure passage to prevent the down-hole medium, causes pressure measurement capillary tube blocking problem to take place.
Three, minor diameter high temperature insulating pressure measuring unit of the present invention, the axially extended connecting portion from the drueckelement two ends is used for fixing with the coiled tubing welding, and simultaneously, it is identical with the diameter of coiled tubing that the diameter of drueckelement keeps, and realized the requirement of down-hole string minor diameter.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 looks sectional view for the master of minor diameter high temperature insulating pressure measuring unit of the present invention.
Fig. 2 is the side view cutaway drawing of minor diameter high temperature insulating pressure measuring unit of the present invention.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Like Fig. 1, shown in 2, the present invention provides a kind of minor diameter high temperature insulating pressure measuring unit, and it comprises drueckelement 1 and pressure measurement capillary tube 2.Wherein: the test line passage 11 that offers axial perforation on the drueckelement 1; On the sidewall of said drueckelement 1, offer pressure tap 12; End at said drueckelement offers pressure transmission passage 13 in axial direction, said pressure tap 12 is connected with said pressure transmission passage 13; One end of pressure measurement capillary tube 2 links to each other with said drueckelement 1, and said pressure measurement capillary tube 2 has measuring pressure passage 21, and said measuring pressure passage 21 is connected with said pressure transmission passage 13, and the diameter of said measuring pressure passage 21 is less than the diameter of said pressure transmission passage 13.
Specifically be, drueckelement 1 is cylinder barrel shaped substantially, and being opened in the test line passage 11 on the drueckelement 1 of axially connecting can wear various test cables; Pressure transmission passage 13 is axially inwardly offered from an end of drueckelement 1, its terminal be opened in drueckelement 1 sidewall on pressure tap 12 be connected, this pressure transmission passage 13 and test line passage 11 parallel.
Pressure measurement capillary tube 2 is cylinder barrel shaped substantially, and it is weldingly fixed on the end that drueckelement 1 offers pressure transmission passage 13, and its measuring pressure passage 21 is connected with the pressure transmission passage 13 of drueckelement 1, and the other end of pressure measurement capillary tube 2 is in order to connection well mouth pressure harvester.
Minor diameter high temperature insulating pressure measuring unit of the present invention; The pressure tap 12 that is opened on drueckelement 1 sidewall forms an open conduit together with coupled logical pressure transmission passage 13, the measuring pressure passage 21 of pressure measurement capillary tube 2; In this open conduit, be filled with transmission medium; In the present invention, this transmission medium is a nitrogen.When this minor diameter high temperature insulating pressure measuring unit being placed on the pressure position of setting the thick oil horizontal well down-hole; The down-hole pressure of thick oil horizontal well can reach the pressure acquisition device of well head through the transmission medium in this open conduit, has realized the test to the down-hole pressure value; In addition; The diameter of the pressure transmission passage 13 of drueckelement 1 is designed to the diameter greater than the measuring pressure passage 21 of pressure measurement capillary tube 2; The benefit of design is like this, is guaranteeing under the certain condition of this minor diameter high temperature insulating pressure measuring unit intensity and length, has correspondingly enlarged the pressure transmission volume that down-hole pressure transmits; Increase pressure measurement stability, improved the pressure test precision.In embodiments of the present invention, the diameter of said pressure transmission passage 13 is that so that its pressure transmission is more stable, the pressure test precision is higher more than the twice of measuring pressure passage 21 diameters of said pressure measurement capillary tube 2.
According to an embodiment of the invention, on the lateral wall of said drueckelement 1, be connected with diaphragm 3, said diaphragm 3 lids are located on the said pressure tap 12.In the present invention, the pad of said diaphragm 3 for processing by stainless steel material, it is welded on the lateral wall place that said drueckelement 1 is provided with said pressure tap 12.Diaphragm 3 of the present invention is used for capping pressure tap 12; To avoid minor diameter high temperature insulating pressure measuring unit of the present invention; In the process in being lowered to thick oil horizontal well; The down-hole medium enters in the measuring pressure passage 21 of pressure measurement capillary tube 2 through the pressure tap 12 of drueckelement 1, causes pressure measurement capillary tube 2 blocking problem to take place.Behind precalculated position under the minor diameter high temperature insulating pressure measuring unit lower going-into-well of the present invention; Through in pressure measurement capillary tube 2, injecting high pressure nitrogen, when the inside and outside pressure reduction P of diaphragm 3 >=1.2MPa, diaphragm 3 comes off automatically; This moment, down-hole medium and pressure measuring unit automatic switching on were realized pressure test.
According to an embodiment of the invention; The other end of said pressure measurement capillary tube 2 is connected with capillary tube joint 4; This capillary tube joint 4 is used for being connected fast with the capillary tube that is lowered to from well head, so that minor diameter high temperature insulating pressure measuring unit of the present invention is linked to each other with the well head pressure harvester.
According to an embodiment of the invention, the two ends of said drueckelement 1 convex with connecting portion 14 respectively, and the diameter of said connecting portion 14 is less than the diameter of said drueckelement 1, and an end of said pressure measurement capillary tube 2 is connected on the said connecting portion 14.Specifically be; The diameter of connecting portion 14 periphery walls is less than the diameter of the periphery wall of drueckelement 1; Between connecting portion 14 and drueckelement 1, form a ledge structure so naturally, insert in the coiled tubing through this ledge structure, and adopt the connected mode of welding connecting portion 14 to be fixedly connected on the inside wall of coiled tubing; Realize minor diameter high temperature insulating pressure measuring unit of the present invention and the connection that is connected oil pipe, and can guarantee the steadiness that connects.In the present invention, the connecting portion 14 at drueckelement 1 two ends is all one-body molded in drueckelement 1, and measuring pressure passage 13 extends in the connecting portion 14, and the measuring pressure passage 21 of the pressure measurement capillary tube 2 that links to each other with connecting portion 14 communicates.In addition; Because the test line passage 11 of drueckelement 1 of the present invention also leaves certain clearance after penetrating various test line; Therefore make drueckelement 1 of the present invention with the process of coiled tubing welding in, can to test line passage 11 in, inject heat insulation nitrogen, make drueckelement 1 interior temperature be no more than 350 ℃; Effectively guaranteed the heat insulation and heat radiation in drueckelement 1 and the coiled tubing welding process, guaranteed that various test cables are not damaged by high temperature.
Further; In the present invention, the diameter of said drueckelement 1 equals the diameter of coiled tubing, after drueckelement 1 and coiled tubing welding are fixing; The periphery wall diameter of drueckelement 1 is suitable with the periphery wall diameter of coiled tubing just, to guarantee the minor diameter requirement of down-hole string.In addition; According to the well pressure measuring requirement; Can on coiled tubing, at interval a plurality of minor diameter high temperature insulating pressure measuring units of the present invention be set, the test line passage 11 that the pressure measurement capillary tube 2 of each minor diameter high temperature insulating pressure measuring unit can pass the drueckelement 1 of coiled tubing and each minor diameter high temperature insulating pressure measuring unit links to each other with the capillary tube that well head is lowered to.
According to an embodiment of the invention; Said drueckelement 1 is processed by the 1Cr18NiTi stainless steel material; The material of the coiled tubing of using in itself and the prior art is approaching, can guarantee that therefore intensity, the toughness after drueckelement 1 and the coiled tubing welding can be close with the technical indicator of coiled tubing.
The above is merely several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the embodiment of the invention according to the disclosed content of application documents and not break away from the spirit and scope of the present invention.
Claims (10)
1. a minor diameter high temperature insulating pressure measuring unit is characterized in that, said minor diameter high temperature insulating pressure measuring unit comprises:
Drueckelement offers the test line passage of axial perforation on it, on the sidewall of said drueckelement, offer pressure tap, offers the pressure transmission passage in axial direction at an end of said drueckelement, and said pressure tap is connected with said pressure transmission passage;
The pressure measurement capillary tube, the one of which end links to each other with said drueckelement, and said pressure measurement capillary tube has measuring pressure passage, and said measuring pressure passage is connected with said pressure transmission passage, and the diameter of said measuring pressure passage is less than the diameter of said pressure transmission passage.
2. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1 is characterized in that the diameter of said pressure transmission passage is more than the twice of said measuring pressure passage diameter.
3. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1 is characterized in that, on the lateral wall of said drueckelement, is connected with diaphragm, and said protection membrane cover is located on the said pressure tap.
4. minor diameter high temperature insulating pressure measuring unit as claimed in claim 3 is characterized in that, the pad of said diaphragm for being processed by stainless steel material.
5. minor diameter high temperature insulating pressure measuring unit as claimed in claim 4 is characterized in that said diaphragm is welded on the lateral wall place that said drueckelement is provided with said pressure tap.
6. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1 is characterized in that the said pressure measurement other end capillaceous is connected with the capillary tube joint.
7. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1; It is characterized in that; The two ends of said drueckelement convex with connecting portion respectively, and the diameter of said connecting portion is less than the diameter of said drueckelement, and a said pressure measurement end capillaceous is connected on the said connecting portion.
8. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1 is characterized in that the diameter of said drueckelement equals the diameter of coiled tubing.
9. minor diameter high temperature insulating pressure measuring unit as claimed in claim 8 is characterized in that said drueckelement is processed by the 1Cr18NiTi stainless steel material.
10. minor diameter high temperature insulating pressure measuring unit as claimed in claim 1 is characterized in that, is filled with transmission medium in said pressure transmission passage, the said measuring pressure passage, and said transmission medium is a nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110362196.5A CN102383782B (en) | 2011-11-15 | 2011-11-15 | Small-diameter high temperature heat-insulating pressure measuring unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110362196.5A CN102383782B (en) | 2011-11-15 | 2011-11-15 | Small-diameter high temperature heat-insulating pressure measuring unit |
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| CN102383782A true CN102383782A (en) | 2012-03-21 |
| CN102383782B CN102383782B (en) | 2014-11-26 |
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| CN201802393U (en) * | 2010-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | Directional automatic opening capillary pressure testing device |
| CN102146792A (en) * | 2010-12-03 | 2011-08-10 | 中国石油天然气股份有限公司 | Temperature and pressure monitoring cable with protection tube and manufacturing method thereof |
| CN202325486U (en) * | 2011-11-15 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter high-temperature heat-insulation pressure measuring unit |
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2011
- 2011-11-15 CN CN201110362196.5A patent/CN102383782B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065140A (en) * | 1991-03-18 | 1992-10-07 | 南京航空学院 | Pressure-measuring probe |
| US5678557A (en) * | 1993-12-23 | 1997-10-21 | Abbott Laboratories | One hand push button intraflo |
| CN2269463Y (en) * | 1996-06-07 | 1997-12-03 | 辽河石油勘探局钻采工艺研究院 | Four parameter testing instrument for high temperature and high pressure |
| CN201041033Y (en) * | 2006-09-29 | 2008-03-26 | 中国石油天然气股份有限公司 | Capillary dynamic stratification pressure monitor |
| CN201170093Y (en) * | 2007-09-18 | 2008-12-24 | 中国石油天然气股份有限公司 | Multi-point temperature pressure dynamic monitoring instrument of horizontal well |
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| CN201802393U (en) * | 2010-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | Directional automatic opening capillary pressure testing device |
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| CN202325486U (en) * | 2011-11-15 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter high-temperature heat-insulation pressure measuring unit |
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