CN201757686U - Hydraulic fracturing crustal stress measuring apparatus - Google Patents

Hydraulic fracturing crustal stress measuring apparatus Download PDF

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Publication number
CN201757686U
CN201757686U CN2010201022768U CN201020102276U CN201757686U CN 201757686 U CN201757686 U CN 201757686U CN 2010201022768 U CN2010201022768 U CN 2010201022768U CN 201020102276 U CN201020102276 U CN 201020102276U CN 201757686 U CN201757686 U CN 201757686U
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CN
China
Prior art keywords
pressure
capsule
sebific duct
compression swelling
hole
Prior art date
Application number
CN2010201022768U
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Chinese (zh)
Inventor
黄炳香
刘长友
付军辉
许亚东
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中国矿业大学
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Priority to CN2010201022768U priority Critical patent/CN201757686U/en
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Publication of CN201757686U publication Critical patent/CN201757686U/en

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Abstract

The utility model provides a hydraulic fracturing crustal stress measuring apparatus, comprising an inner high pressure expansion capsule and an outer high pressure expansion capsule, the outer high pressure expansion capsule is fixedly provided with a steel pipe therein traversing inward the outer high pressure expansion capsule to the out wall of the inner high pressure expansion capsule, the steel pipe section between the inner and outer high pressure expansion capsules is provided with a plurality of pressure injection holes, and a helical form fine copper pipe is winded on the steel section, the external of the outer high pressure expansion capsule is provided with a hydraulic fast joint, the hydraulic fast joint is connected with high pressure pipelines providing pressure for the outer high pressure expansion capsule and a measuring section L, the high pressure pipeline providing pressure for the measuring section L is in a parallel connection with a pressure sensor and a flow sensor connected to a data recording instrument, the data recording instrument is connected with the computer; two high pressure pipelines are respectively connected with a pumping station. and inject hydraulic pressure to a high pressure expansion hose, the high pressure expansion hose expands quickly until forming a sealing state with a hole wall, and then inject high pressure water to the measuring section L to cause fracturing, hydraulic pressure and flow data can be monitored.

Description

A kind of hydrofracturing is measured ground stress apparatus
Technical field
The utility model relates to the measurement ground stress apparatus, and especially a kind of hydrofracturing based on the sealing of expansion sebific duct is measured ground stress apparatus.
Background technology
Terrestrial stress is the natural stress that is present in the stratum, and it is the basic acting force that causes the mining engineering deformation and failure.To mining design, has only the terrestrial stress condition of having grasped concrete engineering zone, could rationally determine mine general layout, choose suitable mining methods, determine the optimum section shape, cross dimensions, excavation step, support form, supporting construction parameter, support time of tunnel and stope etc., under the prerequisite that guarantees adjoining rock stability and exploitation safety, increase mine output to greatest extent, enhance productivity, thus the optimization of realization mining engineering.The method of measuring terrestrial stress mainly comprises stress relief method and hydraulic fracturing etc.; these two kinds of methods all have a lot of deficiencies; wherein stress relief method test terrestrial stress is difficult to guarantee the complete of core; usually can make test crash; the problem that the method for traditional hydrofracturing geodetic stress is main be exactly that sealing effectiveness is bad; thereby influence the accuracy of measurement result, be unfavorable for the safety in production in colliery.
Summary of the invention
The purpose of this utility model is at the problem that exists in the prior art, provides a kind of technology simple, easy to operate, safe and reliable, and hydrofracturing is measured ground stress apparatus more accurately.
For achieving the above object, hydrofracturing of the present utility model is measured ground stress apparatus, comprise datalogger, computing machine, also comprise the inner high voltage expansion capsule and the outer high compression swelling capsule that are located at interval in the rock body drilled, be provided with in the outer high compression swelling capsule to fix and pass outer high compression swelling capsule within it and inwardly through the steel pipe of measuring section L until inner high voltage expansion capsule outer walls, have several on the lengths of steel pipes between outer high compression swelling capsule and the inner high voltage expansion capsule and annotate the pressure hole, and be wound with the thin copper pipe of spiral fashion that is communicated with in outer high compression swelling capsule and the inner high voltage expansion capsule cavity, the outside of outer high compression swelling capsule is provided with the hydraulic quick coupling that communicates with its intracavity through hole and steel pipe, be connected with the pressure duct that outside high compression swelling capsule provides the pressure duct of pressure and pressure is provided to measuring section L on the hydraulic quick coupling, provide to measuring section L on the pressure duct of pressure and be parallel with pressure transducer and the flow sensor that links to each other with datalogger, datalogger is connected with computing machine through lead; Two pressure ducts are connected with pumping plant respectively.
Described inner high voltage expansion capsule by inner high voltage expand sebific duct, the over-pressure safety device that is located at the inner high voltage expansion sebific duct plug of inner high voltage expansion sebific duct outer end and is located at inner high voltage expansion sebific duct front end constitutes; Described inner high voltage expansion sebific duct plug, over-pressure safety device are connected with the form that the junction of inner-pressure expansion sebific duct is the serrated seal groove; Described over-pressure safety device is by the inner via hole plug, and the feather valve that links to each other with inner via hole plug screw thread constitutes; Described outer high compression swelling capsule is made of outer high compression swelling sebific duct, the carriage that is located at the outer high compression swelling sebific duct plug of outer high compression swelling sebific duct outer end and is located at outer high compression swelling sebific duct the inner; Described outer high compression swelling sebific duct plug, carriage are connected with the form that the junction of outer high compression swelling sebific duct is the serrated seal groove; Described carriage comprises the external diameter that is enclosed within on the steel pipe ladder endoporus steel bushing greater than internal diameter, and steel bushing is provided with the through hole that links to each other with the thin copper pipe of spiral fashion, is provided with the hollow bolt of sealing of hole cover and fixed sealing borehole jack in the hole of steel bushing; Described sealing of hole overlaps between external diameter and the steel bushing, sealing of hole overlaps between internal diameter and the steel pipe and is equipped with O-ring seal; Be respectively equipped with stop valve on described two pressure ducts.
Beneficial effect: the utility model is based on the device that forms sealing section hydrofracturing geodetic stress, but effective seal measuring section, reduced to be beneficial to and to measure terrestrial stress accurately, especially for the geologic condition complexity owing to the not accurate enough deficiency of the bad measurement data that produces of sealing, need many places, repeatedly measure the condition of terrestrial stress, it is simple that the present invention has technology, and easy construction is easy to operate, characteristics such as safe and reliable, and have practicality widely.
Description of drawings
Fig. 1 is the structural representation that hydrofracturing geodetic of the present utility model is answered power apparatus.
Fig. 2 is the carriage structural representation that expansion sebific duct of the present utility model shortens.
Among Fig. 1: 1-boring, the outer high compression swelling capsule of 2-, 3-inner high voltage expansion sebific duct; the 4-steel pipe, 5-carriage, 6-inner high voltage expansion sebific duct plug; the thin copper pipe of 7-spiral fashion, 8-are annotated and are pressed hole, 9-over-pressure safety device; the 10-hydraulic quick coupling, 11, the 12-pressure duct, the 13-pressure transducer; the 14-flow sensor; the 15-stop valve, 16-pumping plant, 17-datalogger; the 18-computing machine; the outer high compression swelling sebific duct plug of 19-, 20-inner via hole plug, 21-feather valve; the 22-hollow bolt; the 23-O-ring seal, 24-steel bushing, 25-sealing of hole cover.
Embodiment
Below in conjunction with accompanying drawing enforcement of the present utility model is further described:
Hydrofracturing of the present utility model is measured ground stress apparatus, and mainly by inner high voltage expansion capsule, outer high compression swelling capsule, steel pipe 4, the thin copper pipe 7 of spiral fashion, pressure transducer 13, flow sensor 14, datalogger 17, computing machine 18 constitutes.Inner high voltage expansion capsule is made of inner high voltage expansion sebific duct 3, the over-pressure safety device 9 that is located at the inner high voltage expansion sebific duct plug 6 of inner high voltage expansion sebific duct 3 outer ends and is located at inner high voltage expansion sebific duct 3 front ends, over-pressure safety device 9 is by inner via hole plug 20, the feather valve 21 that links to each other with inner via hole plug 20 screw threads constitutes, and inner high voltage expansion sebific duct plug 6, over-pressure safety device 9 are connected with the form that the junction of inner-pressure expansion sebific duct 3 is the serrated seal groove; Outer high compression swelling capsule is made of outer high compression swelling sebific duct 2, the carriage 5 that is located at the outer high compression swelling sebific duct plug 19 of outer high compression swelling sebific duct 2 outer ends and is located at outer high compression swelling sebific duct 2 the inners, carriage 5 comprises the external diameter that is enclosed within on the steel pipe 4 ladder endoporus steel bushing 24 greater than internal diameter, steel bushing 24 is provided with the through hole that links to each other with the thin copper pipe 7 of spiral fashion, be provided with the hollow bolt 22 of sealing of hole cover 25 and fixed sealing borehole jack 25 in the hole of steel bushing 24, sealing of hole overlaps between 25 external diameters and the steel bushing 24, sealing of hole overlaps between 25 internal diameters and the steel pipe 4 and is equipped with O-ring seal 23; Outer high compression swelling sebific duct plug 19, carriage 5 are connected with the form that the junction of outer high compression swelling sebific duct 2 is the serrated seal groove.Inner high voltage expansion capsule and outer high compression swelling capsule interval measurement section L are located in the rock body drilled 1, measuring section L is about 500mm, be provided with in the outer high compression swelling capsule to fix and pass outer high compression swelling capsule within it and inwardly through the steel pipe 4 of measuring section L until inner high voltage expansion capsule outer walls, have several on the lengths of steel pipes between outer high compression swelling capsule and the inner high voltage expansion capsule and annotate pressure hole 8, and be wound with the thin copper pipe 7 of spiral fashion that is communicated with in outer high compression swelling capsule and the inner high voltage expansion capsule cavity, the outside of outer high compression swelling capsule 2 is provided with the hydraulic quick coupling 10 that communicates with its intracavity through hole and steel pipe 4, be connected with the pressure duct 12 that outside high compression swelling capsule 2 provides the pressure duct 11 of pressure and pressure is provided to measuring section L on the hydraulic quick coupling 10, provide to measuring section L on the pressure duct 12 of pressure and be parallel with pressure transducer 13 and the flow sensor 14 that links to each other with datalogger 17, datalogger 17 is connected with computing machine 18 through lead; Two pressure ducts 11,12 are respectively equipped with stop valve 15 be connected altogether respectively with pumping plant 16 on.
During work; according to roadway surrounding rock stress distribution situation; making a call to a diameter with drilling machine to rock mass is 100mm; dark is the boring of 3000mm; expand capsule and outer high compression swelling capsule interval measurement section L of inner high voltage delivered to rock body drilled 1 predeterminated position; connect hydraulic power unit 16 with hydraulic quick coupling 10; to inside and outside high pressure expansion sebific duct 2; inject the water pressure of about 2MPa~6MPa in 3; interior outer end high pressure expansion sebific duct 3 expands rapidly; until forming sealing state with hole wall; the thin copper pipe 7 of measuring section L spiral fashion can satisfy its stroke; if water pressure is excessive; inner high voltage expansion sebific duct 3 ends have over-pressure safety device 9; to avoid inner high voltage expansion sebific duct 3 to damage and to destroy crag, be communicated with the thin copper pipe 7 of spiral fashion that is wound on the steel pipe 4 between the inside and outside two-supremes compression swelling sebific duct, the thin copper pipe 7 of spiral fashion can stretch.Press hole 8 in middle measuring section L rock, slowly to increase ground by a plurality of notes by high-pressure rubber pipe 12 again by steel pipe 4 and inject water pressure, until hole wall rock fracturing, this moment, pressure descended, and closed pump rapidly, and pressure transducer 13 and flow sensor 14 have just been noted pressure and data on flows.Open pump and continue the pressurization to measuring section L, re-opened in the crack, pressure descends, and closes pump rapidly, and datalogger 17 has just been noted pressure and fluctuations in discharge situation, and circulation repeats 4~5 times.The hydraulic quick coupling 10 that will be connected with pressure duct 15 is taken apart again, water in the outer high compression swelling sebific duct body 2 is laid down automatically, owing to the effect of the restorability of the high resiliency of rubber and enhancement layer angle restores to the original state, just can reclaim this device, the data transmission that obtains by datalogger 17 handles for computing machine 18 at last, thereby draw the distribution of terrestrial stress, to instruct safety in production.

Claims (9)

1. a hydrofracturing is measured ground stress apparatus, comprise datalogger (17), computing machine (18), it is characterized in that: also comprise the inner high voltage expansion capsule and the outer high compression swelling capsule that are located at interval in the rock body drilled (1), be provided with in the outer high compression swelling capsule to fix and pass outer high compression swelling capsule within it and inwardly through the steel pipe (4) of measuring section L until inner high voltage expansion capsule outer walls, have several on the lengths of steel pipes between outer high compression swelling capsule and the inner high voltage expansion capsule and annotate pressure hole (8), and be wound with the thin copper pipe of spiral fashion (7) that is communicated with in outer high compression swelling capsule and the inner high voltage expansion capsule cavity, the outside of outer high compression swelling capsule (2) is provided with the hydraulic quick coupling (10) that communicates with its intracavity through hole and steel pipe (4), be connected with the pressure duct (12) that outside high compression swelling capsule (2) provides the pressure duct (11) of pressure and pressure is provided to measuring section L on the hydraulic quick coupling (10), provide to measuring section L on the pressure duct (12) of pressure and be parallel with pressure transducer (13) and the flow sensor (14) that links to each other with datalogger (17), datalogger (17) is connected with computing machine (18) through lead; Two pressure ducts (11,12) are connected with pumping plant (16) respectively.
2. hydrofracturing according to claim 1 is measured ground stress apparatus, it is characterized in that: described inner high voltage expansion capsule by inner high voltage expand sebific duct (3), be located at the inner high voltage expansion sebific duct plug (6) of inner high voltage expansion sebific duct (3) outer end and be located at over-pressure safety device (9) formation of inner high voltage expansion sebific duct (3) front end.
3. hydrofracturing according to claim 2 is measured ground stress apparatus, and it is characterized in that: described inner high voltage expansion sebific duct plug (6), over-pressure safety device (9) are connected with the form that the junction of inner-pressure expansion sebific duct (3) is the serrated seal groove.
4. according to the device of claim 2 or 3 described measurement terrestrial stress, it is characterized in that: described over-pressure safety device (9) is by inner via hole plug (20), and the feather valve (21) that links to each other with inner via hole plug (20) screw thread constitutes.
5. hydrofracturing according to claim 1 is measured ground stress apparatus, it is characterized in that: described outer high compression swelling capsule by outer high compression swelling sebific duct (2), be located at the outer high compression swelling sebific duct plug (19) of outer high compression swelling sebific duct (2) outer end and be located at inner carriage (5) formation of outer high compression swelling sebific duct (2).
6. hydrofracturing according to claim 5 is measured ground stress apparatus, it is characterized in that: described outer high compression swelling sebific duct plug (19), carriage (5) are connected with the form that the junction of outer high compression swelling sebific duct (2) is the serrated seal groove.
7. measure ground stress apparatus according to claim 5 or 6 described hydrofracturings, it is characterized in that: described carriage (5) comprises the external diameter that is enclosed within on the steel pipe (4) the ladder endoporus steel bushing (24) greater than internal diameter, steel bushing (24) is provided with the through hole that links to each other with the thin copper pipe of spiral fashion (7), is provided with the hollow bolt (22) of sealing of hole cover (25) and fixed sealing borehole jack (25) in the hole of steel bushing (24).
8. hydrofracturing according to claim 7 is measured ground stress apparatus, it is characterized in that: between described sealing of hole cover (25) external diameter and the steel bushing (24), be equipped with O-ring seal (23) between sealing of hole cover (25) internal diameter and the steel pipe (4).
9. hydrofracturing according to claim 1 is measured ground stress apparatus, it is characterized in that: be respectively equipped with stop valve (15) on described two pressure ducts (11,12).
CN2010201022768U 2010-01-23 2010-01-23 Hydraulic fracturing crustal stress measuring apparatus CN201757686U (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102242630A (en) * 2011-01-30 2011-11-16 山东科技大学 Pressure stress monitoring pressure cushion and monitoring device for flexible mines as well as monitoring method of monitoring device
CN103527180A (en) * 2013-10-28 2014-01-22 中国地震局地壳应力研究所 System for collecting in-situ stress measurement data by using hydraulic fracturing
CN103674347A (en) * 2013-12-10 2014-03-26 太原理工大学 Hollow flexible inductor borehole stress sensor and detection method thereof
CN103900751A (en) * 2013-11-28 2014-07-02 长江水利委员会长江科学院 Two-circuit hydraulic fracturing geostress measurement device and method based on wire-line coring drill rod
CN104180931A (en) * 2014-09-11 2014-12-03 江苏安靠智能输电工程科技股份有限公司 Rubber stress cone interfacial pressure measuring device and method
CN106052932A (en) * 2016-07-12 2016-10-26 中南大学 Carbon dioxide phase change rock breaking pore pressure measurement system and method
CN104180931B (en) * 2014-09-11 2017-01-04 江苏安靠智能输电工程科技股份有限公司 A kind of rubber stress cone interfacial pressure detection device and method
CN106404548A (en) * 2016-10-31 2017-02-15 重庆大学 Method for visually analyzing crack propagation under hydraulic fracturing effect
CN106680890A (en) * 2017-01-11 2017-05-17 重庆大学 Mining primary rock stress testing device and method through hydraulic fracturing method
CN106988738A (en) * 2017-05-11 2017-07-28 中国矿业大学 A kind of detection method of definitely stress distribution feature
CN107478357A (en) * 2017-06-28 2017-12-15 山东科技大学 Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method
WO2018161577A1 (en) * 2017-03-07 2018-09-13 中国矿业大学 Monitoring and control method utilized in coal reservoir fracking at mining well, device, and monitoring and control apparatus
CN109357794A (en) * 2018-11-07 2019-02-19 中国矿业大学 A kind of method of hydrofracturing test coal-rock mass ground stress
CN109357942A (en) * 2018-09-19 2019-02-19 三峡大学 A kind of accurate principal stress constructs the device and method of fine stress field

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102242630A (en) * 2011-01-30 2011-11-16 山东科技大学 Pressure stress monitoring pressure cushion and monitoring device for flexible mines as well as monitoring method of monitoring device
CN103527180A (en) * 2013-10-28 2014-01-22 中国地震局地壳应力研究所 System for collecting in-situ stress measurement data by using hydraulic fracturing
CN103900751A (en) * 2013-11-28 2014-07-02 长江水利委员会长江科学院 Two-circuit hydraulic fracturing geostress measurement device and method based on wire-line coring drill rod
CN103900751B (en) * 2013-11-28 2016-02-24 长江水利委员会长江科学院 Borehole wire-line coring drilling rod two-circuit hydraulic fracturing detecting earth stress device and method of testing
CN103674347A (en) * 2013-12-10 2014-03-26 太原理工大学 Hollow flexible inductor borehole stress sensor and detection method thereof
CN103674347B (en) * 2013-12-10 2016-01-20 太原理工大学 A kind of hollow soft elasticity inductor drilling hole stress sensor and detection method
CN104180931A (en) * 2014-09-11 2014-12-03 江苏安靠智能输电工程科技股份有限公司 Rubber stress cone interfacial pressure measuring device and method
CN104180931B (en) * 2014-09-11 2017-01-04 江苏安靠智能输电工程科技股份有限公司 A kind of rubber stress cone interfacial pressure detection device and method
CN106052932A (en) * 2016-07-12 2016-10-26 中南大学 Carbon dioxide phase change rock breaking pore pressure measurement system and method
CN106052932B (en) * 2016-07-12 2019-10-08 中南大学 When carbon dioxide phase transformation broken rock in hole pressure measuring system and method
CN106404548B (en) * 2016-10-31 2019-06-11 重庆大学 A kind of lower crack propagation visual analysis method of hydraulic fracturing effect
CN106404548A (en) * 2016-10-31 2017-02-15 重庆大学 Method for visually analyzing crack propagation under hydraulic fracturing effect
CN106680890A (en) * 2017-01-11 2017-05-17 重庆大学 Mining primary rock stress testing device and method through hydraulic fracturing method
CN106680890B (en) * 2017-01-11 2018-07-03 重庆大学 Mining hydrofracturing method In-situ rock stress measurement device and its test method
WO2018161577A1 (en) * 2017-03-07 2018-09-13 中国矿业大学 Monitoring and control method utilized in coal reservoir fracking at mining well, device, and monitoring and control apparatus
CN106988738A (en) * 2017-05-11 2017-07-28 中国矿业大学 A kind of detection method of definitely stress distribution feature
CN107478357A (en) * 2017-06-28 2017-12-15 山东科技大学 Stress field of the surrounding rock crack field Integrated Monitoring System and quantitatively determine method
CN109357942A (en) * 2018-09-19 2019-02-19 三峡大学 A kind of accurate principal stress constructs the device and method of fine stress field
CN109357794A (en) * 2018-11-07 2019-02-19 中国矿业大学 A kind of method of hydrofracturing test coal-rock mass ground stress

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