CN109060216A - Very small diameter rock mass hydrofracturing tests double loop mounting rod - Google Patents
Very small diameter rock mass hydrofracturing tests double loop mounting rod Download PDFInfo
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- CN109060216A CN109060216A CN201810905692.2A CN201810905692A CN109060216A CN 109060216 A CN109060216 A CN 109060216A CN 201810905692 A CN201810905692 A CN 201810905692A CN 109060216 A CN109060216 A CN 109060216A
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- loop
- mounting rod
- female connector
- pressurizing
- packer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The invention discloses a kind of very small diameter rock mass hydrofracturings to test double loop mounting rod, including high tension loop, pin end, reinforcing rib, female connector and sleeve；High tension loop is made of a fracturing section pressurizing loop, a packer pressurizing loop and an intensity reinforcing rod, and pressure voltage is greater than 40MPa；Pin end is securely welded on high tension loop upper end, there is connection external screw thread on pin end, can be connect with earth's surface high-pressure fluid control system by pin end, can also be with the female connector and sleeve connection of next double loop mounting rod；Sleeve covers on female connector, and posterior medial has connection internal screw thread；The interface of female connector can be connect with the pin end of straddle packer or next double loop mounting rod, be securely fixed by sleeve.The beneficial effects of the present invention are: maximum gauge is not more than 30mm using integrated structure design, it is convenient to assemble, and realizes hydrofracturing In-situ stress measurements in slim hole by pressurizing loop, pin end, reinforcing rib, sleeve and female connector.
Description
Technical field
The present invention relates to a kind of minor diameter rock mass testing tools, specifically, being related to a kind of very small diameter rock mass hydraulic pressure cause
Split test double loop mounting rod.
Background technique
Hubbert and Willis proposes that crack caused by well bore fluid pressure break is answered with institute preservation in rock mass in nineteen fifty-seven
Power state is closely related, and points out that rock mass pressure is not at hydrostatic pressure state.Kehle(1964) packer is isolated for the first time
The stress distribution on wellhole periphery of experimental section carried out simple analysis, and point out that the influence of packer forms hole wall periphery and cuts
Stressed zone.Fairhurst(1964 it is) first scientist for proposing to measure Original strata stress using hydrofracturing technology, and refers to
The plurality of advantages of hydrofracturing technology is gone out.Haimson and Fairhurst(1967) point out the crack generated on the borehole wall with it is following
Three factors are related, 1. crustal stress, 2. the poor stress between the fluid pressure and pore water pressure of hydrofracturing；3. rock mass seeps
Saturating radial flow, these theory analysis have established the theoretical basis of classical hydrofracturing measuring technology.Haimson(1968) exist
In its doctoral thesis to hydrofracturing Original strata stress measuring technology from experiment and theoretical two aspects carried out comprehensive analysis with it is complete
It is kind.The above important process is that hydrofracturing Original strata stress measuring technology is applied to engineering practice to have established theoretical and experiment
Basis.The stress measurement engineering practice of real meaning is by Von Schonfeldt and Fairhurst(1970) research of leader
What group was unfolded in a Minnesotan underground granitic mass；Then, similar answer also has been carried out in the oil field Rangely
Power measurement and research work (Haimson, 1973；Raleigh etc., 1976).From this, Hydraulic Fracturing Stress Measurements formally enter work
Journey practices field.1987 and 2003, International Society of Rock Mechanics (ISRM) was all hydrofracturing In-situ stress measurements method
Recommend as a kind of main stress evaluation method, has also established the critical role of hydrofracturing In-situ stress measurements technology.
The geostress survey work of China is slightly later than foreign countries, and the fifties end, LI Si guang and professor Chen Zongji instruct respectively
Geomechanics and Three Gorges batholith workshop start.In October, 1980, the study group led by professor Li Fangquan is in river
Northern Yi County has successfully carried out hydraulic fracturing geostress survey (Li Fangquan, 1980) for the first time, and subsequent China Seismology Bureau's earth's crust is answered
Power Research Institute success lightweight hydrofracturing measuring device (Li Fangquan, 1981；Ding Jianmin, 1990；An Qimei, 1996；Guo
Qi Liang, 1999).Hydrofracturing measuring technology is widely used popularization in all trades and professions of China.Up to the present, Chinese
The main hydrofracturing test method that the country uses abides by the method that International Society of Rock Mechanics is recommended.
Equipment about hydrofracturing In-situ stress measurements is broadly divided into five major class at present: (1) heavy duty cables formula hydraulic pressure causes
In-situ stress measurements equipment is split, using Switzerland's MESY-SOLEXPERTS equipment as representative；(2) light cable type hydrofracturing original place
Stress measurement equipment, mainly using the shallow bore hole test equipment of CSIR O of Japanese OYO company and Australia tissue manufacture as representative；
(3) comprehensive hydrofracturing test equipment, with French Cornet professor and U.S. professor Thiercelin production by hydrofracturing
Test is representative with the novel hydrofracturing test equipment that other physical prospecting mud logging equipments combine；(4) BABHY test is set
It is standby, it is representative with northeastern Japan university professor Ito manufacture；(5) drilling rod formula hydrofracturing equipment is answered with China Seismology Bureau's earth's crust
The research and development manufacture of power research institute is representative.In all these equipment, the smallest device diameters are the light of CSIR O tissue manufacture
Type hydrofracturing In-situ stress measurements equipment, device diameters are Ф 36mm, are secondly the BABHY test equipment of professor's Ito manufacture,
Testing bore holes diameter is Ф 48mm.
Widely used measuring system is made of six parts at home, pressure fluid control system, high-pressure hydraulic pump, power
System, digital data recording system, straddle packer and high-pressure fluid transportation system.This measuring system is divided into two classes again, a kind of
It is the shallow bore hole for 100m, drilling rod and high pressure resistant hose can be used and realize pressure break to packer and fracturing section water supply respectively.Separately
A kind of outer equipment is the longhole survey for 100m or more, and pressure fluid is supplied respectively to fracturing section and envelope using a switching valve
Every device, measurement system diagram is as illustrated in fig. 1 and 2.Wherein: 20,30: drilling cramp, 21: high-pressure hose, 22,32: drilling rod is connected to test section,
23,33: adapter, 24,34: test section, 25,35: packer, 26,36: pressure sensor.
By the analysis of front it is found that there are no the hydrofracturing detecting earth stress systems that diameter is less than 30mm both at home and abroad at present
System.But the hydrofracturing Original strata stress test macro of minor diameter has equipment light, requires low spy to test pressurized equipment
The high-pressure oil pump pressurization of the annual compression system or two-phase electricity of high output pressure and low discharge can be used in point.At the same time,
Requirement of the minor diameter test equipment to rockmass is low, for bigbore drilling, surveys according to International Society of Rock Mechanics
Examination segment length should be 6 ~ 7 times of bore diameter, then adding for domestic conventional 76mm 94mm geological prospecting borehole
Upper packer length 1.0m or so, then 245.6cm ~ 256.4cm is at least to the length of drilling rockmass, but for one
For a diameter is the drilling of 48mm, it is only necessary to the rockmass length of about 99.2cm long, it is only original less than 40%,
Under identical working condition, so that it may so that amount of test data has more more than one times.At the same time, the brill that drills makes expense can be with brill
Hole aperture becomes smaller and reduces, this is greatly lowered the testing expense of Original strata stress, and the testing time of slim hole also can
Shorten therewith, so that testing expense substantially reduces.Therefore, the research and development of minor diameter Original strata stress test equipment, for pushing
Hydrofracturing In-situ stress measurements and promotion original technology upgrading innovation have important social effect and economic significance.
For minor diameter hydrofracturing test macro, the drilling rod used in conventional hydrofracturing Original strata stress is tested,
The fixture diameters such as high-pressure rubber pipe are excessive, downhole testing equipment can not be installed into predetermined position using original technological approaches,
It realizes simultaneously and provides highly pressurised liquid to packer and fracturing section respectively.The present invention refers to existing technology path, using integrated double
Loop structure gives fracturing section and packer sealing section to provide high pressure liquid respectively by two high pressure resistant stainless steel tubes of mounting rod
Body, complete design and the dedicated double loop mounting rod for manufacturing minor diameter hydrofracturing test device.
Summary of the invention
The present invention is precisely in order to a kind of very small diameter rock mass hydrofracturing test for solving above-mentioned technical problem and designing is double
Circuit mounting rod.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of very small diameter rock mass hydrofracturing tests double loop mounting rod, including high tension loop, pin end, reinforcing rib, mother connect
Head and sleeve；High tension loop is made of a fracturing section pressurizing loop, a packer pressurizing loop and an intensity reinforcing rod,
Its pressure voltage is greater than 40MPa；There are three holes among pin end, are fracturing section pressurizing loop, packer pressurizing loop channel respectively
Reinforce rod aperture with intensity, pin end is securely welded on high tension loop and intensity reinforcing rod upper end, has on pin end and connects outer spiral shell
Line can be connect by pin end with earth's surface high-pressure fluid control system, can also with the female connector of next double loop mounting rod and
Sleeve connection；It is that fracturing section pressurizing loop, packer pressurizing loop channel and intensity are reinforced respectively there are three hole among reinforcing rib
Rod aperture, high tension loop and intensity reinforcing rod are passed through from centre and are securely welded with reinforcing rib；Female connector be fixed on high tension loop and
Intensity reinforcing rod end is fracturing section pressurizing loop, packer pressurizing loop channel and strong respectively there are three hole on the left of female connector
Degree reinforces rod aperture, and high tension loop and intensity reinforcing rod are passed through from centre and securely welded with female connector；Sleeve covers on female connector,
And posterior medial has connection internal screw thread；The interface of female connector can be with the public access of straddle packer or next double loop mounting rod
Head connection, is securely fixed by sleeve.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, fracturing section pressurizing loop, packer pressurization
Circuit and intensity reinforcing rod are all made of high pressure resistant stainless steel tube production, and fracturing section pressurizing loop and packer pressurizing loop are for passing
Defeated highly pressurised liquid, intensity of the intensity reinforcing rod for double loop mounting rod are reinforced, and diameter is Φ 5-7mm, and thickness is
1.2-1.6mm。
The very small diameter rock mass hydrofracturing tests double loop mounting rod, fracturing section pressurizing loop 5, packer pressurization
Circuit and intensity reinforcing rod, diameter are Φ 6mm, and thickness is 1.5mm.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, and corresponding fracturing section pressurizes back on the left of female connector
O-shaped rubber seal is arranged at the bottom in road and two holes of packer pressurizing loop, improves sealing effect.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, and sleeve surface rolls cruciate flower, to increase it
Frictional force, diameter are not more than 30mm.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, altogether there are two reinforcing rib, evenly spaced point
Cloth is in high tension loop middle section.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, pin end, reinforcing rib, female connector and sleeve
It is process using 304 stainless steels.
The task of the invention is: being bored with realizing in minor diameter by invention integrated minor diameter double loop mounting rod
Hydrofracturing In-situ stress measurements work in hole, in the measurement double loop mounting rod of Φ 30mm specification, high tension loop (pressure break
Section pressurizing loop and packer pressurizing loop) diameter is Φ 6mm, and thickness is 1.5mm.Meet two kinds of mounting rod size Φ
The requirement of 30 ± 1mm pressure resistance 40MPa, while seal approach also meets the requirement of pressure resistance 40MPa.Utilize the two of double loop mounting rod
The packer and fracturing section feed flow of underground equipment are given in a circuit respectively, and at the same time monitoring two circuits of fracturing section and packer
Pressure value is conducive to the stress database for obtaining high quality, realizes that the hydrofracturing Original strata stress in slim hole is surveyed
Amount.
The beneficial effects of the present invention are: very small diameter rock mass hydrofracturing tests double loop mounting rod, tied using integration
Structure design, maximum gauge be not more than 30mm, assemble it is convenient, by pressurizing loop, pin end, reinforcing rib, sleeve and female connector this
Five components realize hydrofracturing In-situ stress measurements in slim hole.
Detailed description of the invention
Fig. 1 is existing double back path test system hydrofracturing In-situ stress measurements device straddle packer schematic diagram.
Fig. 2 is existing single loop test macro hydrofracturing In-situ stress measurements device straddle packer schematic diagram.
Fig. 3 is that minor diameter of the present invention measures double loop mounting rod cross-sectional view.
Fig. 4 is that Fig. 3 A-A shows to minor diameter measurement double loop mounting rod assembling schematic diagram.
Fig. 5 is pin end mechanical construction drawing of the present invention.
Fig. 6 is reinforcing rib mechanical construction drawing of the present invention.
Fig. 7 is female connector mechanical construction drawing of the present invention.
Fig. 8 is sleeve mechanical construction drawing of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in figures 3-8, a kind of very small diameter rock mass hydrofracturing of the present invention tests double loop mounting rod, including height pushes back
Road, pin end 1, reinforcing rib 2, female connector 3 and sleeve 4；High tension loop is added by 5, packers of a fracturing section pressurizing loop
It pushes back road 6 and an intensity reinforcing rod 13 forms, pressure voltage is greater than 40MPa；There are three holes among pin end 1, are pressure respectively
It splits a section pressurizing loop, packer pressurizing loop channel and intensity and reinforces rod aperture, pin end 1 is securely welded on high tension loop and intensity
There is connection external screw thread 11 in reinforcing rod upper end on pin end 1, can be connect with earth's surface high-pressure fluid control system by pin end 1,
It can also be connect with the female connector 3 of next double loop mounting rod and sleeve 4；There are three holes among reinforcing rib 2, are fracturing section respectively
Pressurizing loop, packer pressurizing loop channel and intensity are reinforced rod aperture, high tension loop and intensity reinforcing rod 13 and are passed through simultaneously from centre
It is securely welded with reinforcing rib 2；Female connector 3 is fixed on 13 end of high tension loop and intensity reinforcing rod, and there are three 3 left sides of female connector
Hole is that fracturing section pressurizing loop, packer pressurizing loop channel and intensity reinforce rod aperture, high tension loop and intensity reinforcing rod respectively
13 pass through from centre and securely weld with female connector 3；4 sets of sleeve on female connector 3, and posterior medial have connection internal screw thread 12；
The interface 7 of female connector 3 can be connect with the pin end 1 of straddle packer or next double loop mounting rod, by sleeve 4 by its
It securely fixes.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, fracturing section pressurizing loop 5, packer pressurization
Circuit 6 and intensity reinforcing rod 13 are all made of high pressure resistant stainless steel tube production, fracturing section pressurizing loop 5 and packer pressurizing loop 6
It is used for transmission highly pressurised liquid, intensity of the intensity reinforcing rod 13 for double loop mounting rod is reinforced, and diameter is Φ 5-7mm, thick
Degree is 1.2-1.6mm.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, fracturing section pressurizing loop 5, packer pressurization
Circuit 6 and intensity reinforcing rod 13, diameter are Φ 6mm, and thickness is 1.5mm.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, and fracturing section pressurization is corresponded on the left of female connector 3
O-shaped rubber seal 8 is arranged at the bottom in circuit 5 and two holes of packer pressurizing loop 6, improves sealing effect.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, and cruciate flower is rolled on 4 surface of sleeve, to increase it
Frictional force, diameter are not more than 30mm.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, altogether there are two reinforcing rib 2, evenly spaced point
Cloth is in high tension loop middle section.
The very small diameter rock mass hydrofracturing tests double loop mounting rod, pin end 1, reinforcing rib 2,3 and of female connector
Sleeve 4 is process using 304 stainless steels.
Very small diameter rock mass hydrofracturing of the present invention tests double loop mounting rod, referred to as " mounting rod " ", diameter is maximum
Part is not more than 30mm, when being mainly used for carrying out the test of hydrofracturing Original strata stress in the Φ 38mm slim hole in rock mass
Straddle packer in aperture high-pressure fluid control system and hole is connected, and passes through this double loop mounting rod for straddle packer
It is placed into fc-specific test FC depth location in hole, while the highly pressurised liquid that aperture high-pressure oil pump provides is respectively transmitted to cross connection type packing
Device and fracturing section, to realize the work of the hydrofracturing In-situ stress measurements in slim hole.By inventing double loop peace
Bar is filled, the hydrofracturing Original strata stress test in the Φ 38mm slim hole in rock mass is realized.This set equipment is being tested
Original strata stress test experiments in room are tested, and application effect is good.Experimentation is described in detail as follows:
(1) simulate live slim hole using the steel pipe that internal diameter is Ф 34mm, by high-pressure oil pump, high-pressure fluid control system,
Double loop mounting rod and minor diameter straddle packer connect.
(2) oil pump outlet valve is opened, fracturing section ball valve and pressure relief ball valve are closed, pressurizes to packer, examines setting function,
Packer monitors pressure gauge and shows packer pressure resistance 40MPa, and setting ability is good.
(3) oil pump outlet valve is opened, packer needle-valve and pressure relief ball valve are closed, is pressurizeed to fracturing section, pressure break function is examined,
Fracturing section monitors pressure gauge and shows fracturing section pressure resistance 40MPa, packer pressure 50MPa, and high-pressure fluid pressure break fan-out capability is good.
(4) in test process, each connector leakproofness is good, does not have evaporating, emitting, dripping or leaking of liquid or gas phenomenon, and pressure maintains stability good
It is good.
(5) oil pump oil return valve is opened, delivery valve is closed, opens packer needle-valve, fracturing section ball valve, pressure relief ball valve, is completed
Blowout job.
The present invention is not limited to above-mentioned preferred forms, anyone obtain under the inspiration of the present invention other it is any with
The identical or similar product of the present invention, is within the scope of the present invention.
Claims (7)
1. a kind of very small diameter rock mass hydrofracturing tests double loop mounting rod, including high tension loop, pin end (1), reinforcing rib
(2), female connector (3) and sleeve (4)；It is characterized by: high tension loop is by a fracturing section pressurizing loop (5), a packer
Pressurizing loop (6) and intensity reinforcing rod (13) composition, pressure voltage are greater than 40MPa；Hole there are three pin end (1) is intermediate,
It is that fracturing section pressurizing loop, packer pressurizing loop channel and intensity reinforce rod aperture respectively, pin end (1) is securely welded on high pressure
Circuit and intensity reinforcing rod upper end have connection external screw thread (11) on pin end (1), can be with earth's surface high pressure by pin end (1)
Fluid control systems connection, can also connect with the female connector (3) of next double loop mounting rod and sleeve (4)；In reinforcing rib (2)
Between there are three hole, be that fracturing section pressurizing loop, packer pressurizing loop channel and intensity reinforce rod aperture respectively, high tension loop and strong
Degree reinforcing rod (13) is passed through from centre and is securely welded with reinforcing rib (2)；Female connector (3) is fixed on high tension loop and intensity is reinforced
Bar (13) end is fracturing section pressurizing loop, packer pressurizing loop channel and strong respectively there are three hole on the left of female connector (3)
Degree reinforces rod aperture, and high tension loop and intensity reinforcing rod (13) are passed through from centre and securely welded with female connector (3)；Sleeve (4) set
On female connector (3), and posterior medial has connection internal screw thread (12)；The interface (7) of female connector (3) can with straddle packer or
The pin end (1) of next double loop mounting rod connects, and is securely fixed by sleeve (4).
2. very small diameter rock mass hydrofracturing according to claim 1 tests double loop mounting rod, it is characterised in that: pressure break
Section pressurizing loop (5), packer pressurizing loop (6) and intensity reinforcing rod (13) are all made of high pressure resistant stainless steel tube production, pressure break
Section pressurizing loop (5) and packer pressurizing loop (6) are used for transmission highly pressurised liquid, and intensity reinforcing rod (13) is installed for double loop
The intensity of bar is reinforced, and diameter is Φ 5-7mm, and thickness is 1.2-1.6mm.
3. very small diameter rock mass hydrofracturing according to claims 1 and 2 tests double loop mounting rod, it is characterised in that:
Fracturing section pressurizing loop (5), packer pressurizing loop (6) and intensity reinforcing rod (13), diameter are Φ 6mm, and thickness is
1.5mm。
4. very small diameter rock mass hydrofracturing according to claim 1 tests double loop mounting rod, it is characterised in that: mother connects
O-shaped rubber seal is arranged at the bottom in corresponding fracturing section pressurizing loop (5) and two holes of packer pressurizing loop (6) on the left of head (3)
It encloses (8), improves sealing effect.
5. very small diameter rock mass hydrofracturing according to claim 1 tests double loop mounting rod, it is characterised in that: sleeve
(4) cruciate flower is rolled on surface, and to increase its frictional force, diameter is not more than 30mm.
6. very small diameter rock mass hydrofracturing according to claim 1 tests double loop mounting rod, it is characterised in that: shared
Two reinforcing ribs (2) are evenly spaced to be distributed in high tension loop middle section.
7. according to claim 1, very small diameter rock mass hydrofracturing described in 4,5 and 6 tests double loop mounting rod, feature exists
In: pin end (1), reinforcing rib (2), female connector (3) and sleeve (4) are process using 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905692.2A CN109060216B (en) | 2018-08-10 | 2018-08-10 | Double-loop installation rod for hydraulic fracturing test of rock mass with very small diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905692.2A CN109060216B (en) | 2018-08-10 | 2018-08-10 | Double-loop installation rod for hydraulic fracturing test of rock mass with very small diameter |
Publications (2)
| Publication Number | Publication Date |
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| CN109060216A true CN109060216A (en) | 2018-12-21 |
| CN109060216B CN109060216B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810905692.2A Active CN109060216B (en) | 2018-08-10 | 2018-08-10 | Double-loop installation rod for hydraulic fracturing test of rock mass with very small diameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
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| US6460936B1 (en) * | 1999-06-19 | 2002-10-08 | Grigori Y. Abramov | Borehole mining tool |
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| CN104453865A (en) * | 2013-09-17 | 2015-03-25 | 李忠久 | Single-loop hydrofracturing in-situ stress measuring system |
| CN205559237U (en) * | 2016-03-24 | 2016-09-07 | 中国地震局地壳应力研究所 | Hydrofracturing in -situ stress measures unsteady flow volume high pressure water pump |
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2018
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| US6460936B1 (en) * | 1999-06-19 | 2002-10-08 | Grigori Y. Abramov | Borehole mining tool |
| CN104453865A (en) * | 2013-09-17 | 2015-03-25 | 李忠久 | Single-loop hydrofracturing in-situ stress measuring system |
| 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 |
| CN205559237U (en) * | 2016-03-24 | 2016-09-07 | 中国地震局地壳应力研究所 | Hydrofracturing in -situ stress measures unsteady flow volume high pressure water pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
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