CN105756666A - Downhole pressure detecting device - Google Patents
Downhole pressure detecting device Download PDFInfo
- Publication number
- CN105756666A CN105756666A CN201610286259.6A CN201610286259A CN105756666A CN 105756666 A CN105756666 A CN 105756666A CN 201610286259 A CN201610286259 A CN 201610286259A CN 105756666 A CN105756666 A CN 105756666A
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- CN
- China
- Prior art keywords
- chamber
- hole
- shaft
- detecting device
- cable
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 22
- 210000004907 gland Anatomy 0.000 claims description 14
- 230000000994 depressogenic effect Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the technical field of pressure detection, in particular to a downhole pressure detecting device for permanent coalbed methane detection on deep well environment. The detecting device comprises an upper connecting body, a shaft-shaped main body and a lower connecting body which are sequentially connected. According to the downhole pressure detecting device disclosed by the invention, a fluid channel is vertically arranged, so that the miniaturization of the whole device is facilitated; a first chamber and a second chamber are separately formed in the shaft-shaped main body; the first chamber is used for accommodating a pressure sensor, and the second chamber is used for accommodating a cable; the first chamber is communicated with the fluid channel through a first penetrating hole; the second chamber is communicated with the first chamber through a second penetrating hole; one end of the cable penetrates through the second penetrating hole to be electrically connected with the body of the pressure sensor, and the other end of the cable extends out of the shaft-shaped main body from the second chamber, so that the whole device has better gas tightness, and besides the cable arraying problem of the cable required for remote signal transmission is solved.
Description
Technical field
The present invention relates to technical field of pressure detection, be specifically related to the down-hole pressure detecting device that a kind of permanent coal bed gas for deep-well environment detects.
Background technology
The exploration and development flow process of coal bed gas mainly includes drilling well, completion and mining stage, and mining is the important step of cbm development.Correlation theory both domestic and external research and practical experience show: the down-hole pressure data in coal bed gas exclusion process are most important, and it is to judge mining accident and formulate the important parameter of rational mining technique.Based on this, domestic and international relevant scholar and company have developed some relevant pressure bombs and down-hole pressure data detected in real time, but due to the restriction by dimensional space, signal transmission distance and air-proof condition etc., existing product is undesirable close to the down-hole pressure detection method Detection results of the coal bed gas extraction well of 3000 meters in the degree of depth, the especially long-distance transmissions aspect of sealing property and signal.
In consideration of it, overcome above defect of the prior art, it is provided that the down-hole pressure detecting device that a kind of permanent coal bed gas for deep-well environment detects becomes the technical problem that this area is urgently to be resolved hurrily.
Summary of the invention
Present invention aims to the drawbacks described above of prior art, it is provided that a kind of down-hole pressure detecting device.
The purpose of the present invention can be realized by following technical measures:
A kind of down-hole pressure detecting device, compared with prior art, it is different in that, this device includes the upper connector, shaft-like main body and the lower connector that are sequentially connected with；Wherein, described pressure-detecting device has the fluid passage extended along its central shaft, described fluid passage through upper connector successively, shaft-like main body and lower connector；Described shaft-like main body is provided with the first chamber, the second chamber, extends to the first through hole of described first chamber from described fluid passage and extend to the second through hole of described second chamber from described first chamber；Described first chamber is provided with pressure transducer, the end of measuring of pressure transducer is arranged in the end of described first through hole side in the first chamber so that described measurement end is exposed to fluid, is provided with the first sealing member between the body of pressure transducer and the first chamber inner wall；Being provided with cable in described second chamber, be provided with seal between the inwall of described cable and the second chamber, described cable one end is through the second through hole electrically connects with pressure sensor body, the other end stretches out shaft-like body exterior from the second chamber.
Preferably, described seal includes seal body, is located at the gland of seal body upper end and is located at the intrinsic sealing ring of seal, seal body and gland all offer cable-through hole, the cable-through hole inwall of described seal body offers the cannelure for holding sealing ring, gland inserts seal body until contacting with described sealing ring from the top of seal body, and the cable-through hole of seal body connects formation passing channel with the cable-through hole of gland.
Preferably, described seal is additionally provided with the hold-down bolt of at least one longitudinal extension.
Preferably, described first chamber extends radially to shaft-like body outer surface from one end of the first through hole side along shaft-like main body, described first chamber is stepped, it is from being divided into first paragraph, second segment and the 3rd section successively near one end to one end away from the first through hole of the first through hole, the measurement end of pressure transducer is contained in first paragraph, the body of pressure transducer is contained in second segment, is provided with sealing-plug in the 3rd section.
Preferably, it is provided with the second sealing member between described sealing-plug and second segment and the junction of the 3rd section.
Preferably, described detecting device also includes at least one securing member being sheathed on described upper connecting portion, for fixing the external part that cable stretches out from the second chamber.
Preferably, described upper connector outer surface offers the groove for holding described securing member.
Preferably, the upper end of described shaft-like main body is connected by threaded engagement with described upper connector, and the lower end of described shaft-like main body is connected by threaded engagement with described lower connector.
Preferably, described shaft-like main body upper end forms depressed part, and the lower end of described upper connector forms the lobe coordinated with shaft-like body depression portion.
Preferably, described shaft-like main body lower end forms lobe, and the upper end of described lower connector forms the depressed part with shaft-like main body raised portion fits.
The fluid passage of the down-hole pressure detecting device of the present invention is longitudinally disposed, be conducive to the miniaturization of whole device, shaft-like main body is provided with the first chamber and the second chamber that are respectively used to hold pressure transducer and cable, first chamber is connected with fluid passage by the first through hole, second chamber passes through the second through hole and the first chamber, cable one end electrically connects through the second through hole with pressure sensor body, the other end stretches out shaft-like body exterior from the second chamber, be conducive to whole device to have better air-tightness and solve the winding displacement problem of cable needed for distant signal transmission simultaneously.
Accompanying drawing explanation
Fig. 1 is the front view of the pressure-detecting device of the present invention.
Fig. 2 is the partial enlarged drawing of the pressure-detecting device of the present invention.
Fig. 3 is the side view of the pressure-detecting device of the present invention.
Fig. 4 be the present invention pressure-detecting device in the front view of seal.
Fig. 5 be the present invention pressure-detecting device in the top view of seal.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Hereinafter, reference accompanying drawing is more fully understood that many aspects of the present invention.Parts in accompanying drawing are not necessarily drawn to scale.Alternatively, it is preferred that emphasis is clearly demonstrate the parts of the present invention.Additionally, in some views in the accompanying drawings, identical accompanying drawing labelling indicates corresponding part.
" exemplary " or " illustrative " represents as example, example or explanation as used herein, the word.It is preferred or favourable for being described herein as that any embodiment of " exemplary " or " illustrative " is not necessarily to be construed as relative to other embodiment.All embodiments described below are illustrative embodiments, thering is provided these illustrative embodiments is that the scope of the present disclosure is defined by the claims so that those skilled in the art make and use embodiment of the disclosure and expect and be not limiting as the scope of the present disclosure.In other embodiments, describe in detail the feature known and method not obscure the present invention.For purpose described herein, term " on ", D score, "left", "right", "front", "rear", " vertically ", " level " with its derivative words by relevant for the invention directed with such as Fig. 1.And, have no intent to be subject to any theoretical restriction expressed or imply provided in technical field above, background technology, summary of the invention or detailed description below.Should also be clear that shown in the drawings and concrete device described in discussion below book and process are the simple examples embodiments of the inventive concept limited in the following claims.Therefore, the concrete size relevant to presently disclosed embodiment and other physical features are understood not to restrictive, unless claims are separately stated clearly.
Fig. 1 illustrates a kind of down-hole pressure detecting device 100, this device 100 includes: upper connector 20, shaft-like main body 10 and lower connector 30, this device 100 has along the fluid passage 101 that its central shaft extends, when device 100 is placed in deep-well bottom, gas flows through this fluid passage 101, this fluid passage 101 through upper connector 20 successively, shaft-like main body 10 and lower connector 30.
Shaft-like main body 10 has upper end 11 and a lower end 12, upper end 11 and be carved with screw thread on lower end 12, and upper connector 20 and lower connector 30 are each through being threaded in shaft-like main body 10.In a preferred embodiment, the upper end 11 of shaft-like main body 10 forms depressed part, and the lower end of upper connector 20 forms the lobe coordinated with the depressed part of upper end 11, and the screw thread of upper end 11 carves the surface in its depressed part.The lower end 12 of shaft-like main body 10 forms lobe, and the upper end of lower connector 30 forms the depressed part of the raised portion fits with lower end 12, and the screw thread of lower end 12 carves the surface in its lobe.
Refer to shown in Fig. 1, Fig. 2 and Fig. 3, shaft-like main body 10 is provided with the first chamber the 13, second chamber the 14, first through hole 15 and the second through hole 16, first through hole 15 extends to the first chamber 13 from fluid passage 101, and the second through hole 16 extends to the second chamber 14 from the first chamber 13.First chamber 13 is provided with pressure transducer 40, the end 40a that measures of pressure transducer 40 is arranged in the end of the first through hole 15 side so that measurement end 40a is exposed to fluid in the first chamber 13, is provided with the first sealing member 51 between the body 40b of pressure transducer 40 and the first chamber 13 inwall.Second chamber 14 is provided with cable 60, being provided with seal 70 between cable 60 and the inwall of the second chamber 14, it is outside that cable 60 one end electrically connects through the second through hole 16 with the body 40b of pressure transducer 40, the other end stretches out shaft-like main body 10 from the second chamber 14.Be positioned at down-hole pipe nipple (including measurement apparatus 100) measure to data be real-time transmitted to earth's surface host computer through cable 60, and transmission range is 3000 meters farthest, being provided with software in host computer, the data that can down-hole short circuit be sended over carry out the real-time display of oscillogram mode.In a preferred embodiment, first chamber 13 extends radially to shaft-like main body 10 outer surface from one end of the first through hole 15 side along shaft-like main body 10, first chamber 13 is stepped, it is divided into first paragraph 13a from the one end near the first through hole 15 successively to the one end away from the first through hole 15, three sections of 13c of second segment 13b and the, the measurement end 40a of pressure transducer 40 is contained in first paragraph 13a, such as, the inwall measuring end 40a and first paragraph 13a forms threaded engagement, the body 40b of pressure transducer 40 is contained in second segment 13b, it is provided with sealing-plug 80 in 3rd section of 13c, the second sealing member 52 it is provided with between the junction of sealing-plug 80 and second segment 13b and the 3rd section of 13c.Sealing-plug the 80, first sealing member 51 and the second sealing member 52 ensure that the first chamber 13 is formed and seal space, and only the measurement end 40a of pressure transducer 40 exposes in a fluid.The end face of sealing-plug 80 can process square groove, to facilitate employing inner hexagon spanner just unloading.
Refer to shown in Fig. 4 and Fig. 5, seal 70 includes seal body 71, gland 72, sealing ring 73, gland 72 is located at seal body 71 upper end, sealing ring 73 is located in seal body 71, seal body 71 and gland 72 offer cable-through hole 71a respectively, cable-through hole 71b, the cable-through hole 71a inwall of seal body 71 offers the cannelure for holding sealing ring 73, sealing ring 73 is arranged in cannelure, gland 72 inserts seal body 71 until contacting with sealing ring 73 from the top of seal body 71, the cable-through hole 71a of seal the body 71 and cable-through hole 72a of gland 72 connects formation passing channel, cable 60 is arranged in this passing channel.Seal 70 is additionally provided with the hold-down bolt 74 along its longitudinal extension, for instance, the quantity of hold-down bolt 74 is 4, is circumferentially uniformly distributed.While utilizing four hold-down bolts 74 gland 72 and seal body 71 to be compressed can by sealing ring 73 crimp, thus realizing the sealing to cable 60.Four hold-down bolt 74 tops all have square groove, and convenient use inner hexagon spanner carries out unloading.Referring to shown in Fig. 4, seal 70 always has 8 holes, wherein four are used by four hold-down bolts 74 by screwed hole, and four additional is through hole, are used for using fixing bolt that seal 70 is fixed on shaft-like main body 10.Seal 70 can also along vertical two or more to arranging.
In a preferred embodiment, being arranged with securing member 90 outside upper connecting portion 20, securing member 90 is for fixing the external part that cable 60 stretches out from the second chamber 14.Securing member 90 can arrange one or more, for instance, two.In order to avoid encountering drill hole inner wall owing to securing member 90 is oversize, upper connector 20 outer surface offers the groove for holding securing member 90.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (10)
1. a down-hole pressure detecting device, it is characterised in that this device includes the upper connector, shaft-like main body and the lower connector that are sequentially connected with；Wherein, described pressure-detecting device has the fluid passage extended along its central shaft, described fluid passage through upper connector successively, shaft-like main body and lower connector；Described shaft-like main body is provided with the first chamber, the second chamber, extends to the first through hole of described first chamber from described fluid passage and extend to the second through hole of described second chamber from described first chamber；Described first chamber is provided with pressure transducer, the end of measuring of pressure transducer is arranged in the end of described first through hole side in the first chamber so that described measurement end is exposed to fluid, is provided with the first sealing member between the body of pressure transducer and the first chamber inner wall；Being provided with cable in described second chamber, be provided with seal between the inwall of described cable and the second chamber, described cable one end is through the second through hole electrically connects with pressure sensor body, the other end stretches out shaft-like body exterior from the second chamber.
2. down-hole pressure detecting device according to claim 1, it is characterized in that, described seal includes seal body, is located at the gland of seal body upper end and is located at the intrinsic sealing ring of seal, seal body and gland all offer cable-through hole, the cable-through hole inwall of described seal body offers the cannelure for holding sealing ring, gland inserts seal body until contacting with described sealing ring from the top of seal body, and the cable-through hole of seal body connects formation passing channel with the cable-through hole of gland.
3. down-hole pressure detecting device according to claim 2, it is characterised in that described seal is additionally provided with the hold-down bolt of at least one longitudinal extension.
4. down-hole pressure detecting device according to claim 1, it is characterized in that, described first chamber extends radially to shaft-like body outer surface from one end of the first through hole side along shaft-like main body, described first chamber is stepped, it is from being divided into first paragraph, second segment and the 3rd section successively near one end to one end away from the first through hole of the first through hole, the measurement end of pressure transducer is contained in first paragraph, and the body of pressure transducer is contained in second segment, is provided with sealing-plug in the 3rd section.
5. down-hole pressure detecting device according to claim 4, it is characterised in that be provided with the second sealing member between described sealing-plug and second segment and the junction of the 3rd section.
6. down-hole pressure detecting device according to claim 1, it is characterised in that described detecting device also includes at least one securing member being sheathed on described upper connecting portion, for fixing the external part that cable stretches out from the second chamber.
7. down-hole pressure detecting device according to claim 6, it is characterised in that described upper connector outer surface offers the groove for holding described securing member.
8. down-hole pressure detecting device according to claim 1, it is characterised in that the upper end of described shaft-like main body is connected by threaded engagement with described upper connector, the lower end of described shaft-like main body is connected by threaded engagement with described lower connector.
9. down-hole pressure detecting device according to claim 8, it is characterised in that described shaft-like main body upper end forms depressed part, the lower end of described upper connector forms the lobe coordinated with shaft-like body depression portion.
10. down-hole pressure detecting device according to claim 8, it is characterised in that described shaft-like main body lower end forms lobe, the upper end of described lower connector forms the depressed part with shaft-like main body raised portion fits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286259.6A CN105756666A (en) | 2016-05-04 | 2016-05-04 | Downhole pressure detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286259.6A CN105756666A (en) | 2016-05-04 | 2016-05-04 | Downhole pressure detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105756666A true CN105756666A (en) | 2016-07-13 |
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ID=56322446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610286259.6A Pending CN105756666A (en) | 2016-05-04 | 2016-05-04 | Downhole pressure detecting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN105756666A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201381847Y (en) * | 2009-04-17 | 2010-01-13 | 西安石油大油气科技有限公司 | Pressure and temperature measuring device during perforation and compression fracture |
| CN102562035A (en) * | 2012-01-12 | 2012-07-11 | 中国海洋石油总公司 | Underground engineering parameter measurement-while-drilling device |
| CN102680007A (en) * | 2012-05-27 | 2012-09-19 | 上海航天能源股份有限公司 | Temperature and pressure all-in-one sensor for natural gas pipeline pressure maintaining tests |
| CN202467827U (en) * | 2012-03-27 | 2012-10-03 | 中国石油天然气股份有限公司 | Underground stratification direct reading tester |
| CN203239329U (en) * | 2013-04-02 | 2013-10-16 | 中国石油天然气股份有限公司 | Separated layer water injection high-pressure seal examining instrument |
| CN103573253A (en) * | 2013-10-11 | 2014-02-12 | 郑州宜源翔石油科技有限公司 | Unblocking device of cable logging instrument |
| CN104179484A (en) * | 2014-08-18 | 2014-12-03 | 哈尔滨工业大学 | Internal magnetic flowmeter type intelligent recoverable injection allocation device |
| CN104533390A (en) * | 2014-12-31 | 2015-04-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Coiled tubing underground load testing tool |
| CN205618151U (en) * | 2016-05-04 | 2016-10-05 | 中国地质大学（武汉） | Pressure measurement in pit |
-
2016
- 2016-05-04 CN CN201610286259.6A patent/CN105756666A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201381847Y (en) * | 2009-04-17 | 2010-01-13 | 西安石油大油气科技有限公司 | Pressure and temperature measuring device during perforation and compression fracture |
| CN102562035A (en) * | 2012-01-12 | 2012-07-11 | 中国海洋石油总公司 | Underground engineering parameter measurement-while-drilling device |
| CN202467827U (en) * | 2012-03-27 | 2012-10-03 | 中国石油天然气股份有限公司 | Underground stratification direct reading tester |
| CN102680007A (en) * | 2012-05-27 | 2012-09-19 | 上海航天能源股份有限公司 | Temperature and pressure all-in-one sensor for natural gas pipeline pressure maintaining tests |
| CN203239329U (en) * | 2013-04-02 | 2013-10-16 | 中国石油天然气股份有限公司 | Separated layer water injection high-pressure seal examining instrument |
| CN103573253A (en) * | 2013-10-11 | 2014-02-12 | 郑州宜源翔石油科技有限公司 | Unblocking device of cable logging instrument |
| CN104179484A (en) * | 2014-08-18 | 2014-12-03 | 哈尔滨工业大学 | Internal magnetic flowmeter type intelligent recoverable injection allocation device |
| CN104533390A (en) * | 2014-12-31 | 2015-04-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Coiled tubing underground load testing tool |
| CN205618151U (en) * | 2016-05-04 | 2016-10-05 | 中国地质大学（武汉） | Pressure measurement in pit |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160713 |
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| RJ01 | Rejection of invention patent application after publication |