CN110318677A - Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device - Google Patents

Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device Download PDF

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Publication number
CN110318677A
CN110318677A CN201910720828.7A CN201910720828A CN110318677A CN 110318677 A CN110318677 A CN 110318677A CN 201910720828 A CN201910720828 A CN 201910720828A CN 110318677 A CN110318677 A CN 110318677A
Authority
CN
China
Prior art keywords
hole
nozzle
water
tube
hole hammer
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
Application number
CN201910720828.7A
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Chinese (zh)
Inventor
彭枧明
杨正龙
李宽
李彦良
李柯柯
张广
张鹏宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jilin University
Institute of Exploration Technology Chinese Academy of Geological Sciences
Original Assignee
Jilin University
Institute of Exploration Technology Chinese Academy of Geological Sciences
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jilin University, Institute of Exploration Technology Chinese Academy of Geological Sciences filed Critical Jilin University
Priority to CN201910720828.7A priority Critical patent/CN110318677A/en
Publication of CN110318677A publication Critical patent/CN110318677A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00Valve arrangements for boreholes or wells
    • E21B34/06Valve arrangements for boreholes or wells in wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/18Drilling by liquid or gas jets, with or without entrained pellets
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/28Enlarging drilled holes, e.g. by counterboring
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/04Ball valves

Abstract

Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device, belong to hot dry rock probing drilling tool technical field, including outer tube, circlip, nozzle, water-jet circulation road, nozzle cage, down-hole hammer fluid course, valve seat, spring and steel ball, outer tube upper end is connected through a screw thread with drilling rod, outer tube lower end is connected through a screw thread with hydraulic in-the-hole hammer, steel ball is for controlling water-jet circulation road and down-hole hammer fluid course switching, steel ball is not placed in down-hole hammer fluid course when creeping into work, drilling rod, the center fluid course of outer tube and hydraulic in-the-hole hammer is interconnected, the water flow of water-jet circulation road is separated by valve seat top, when drilling terminates to need replacing new down-hole hammer drilling, steel ball is placed in down-hole hammer fluid course, down-hole hammer fluid course is closed, water-jet circulation road is opened, drilling fluid forms water jet rock breaking hole wall rock by nozzle, it realizes Reaming hole operation.The present invention completes reaming hole operation while mentioning brill, saves time cost and drilling cost, improves the drilling efficiency of hot dry rock.

Description

Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device
Technical field
The present invention relates to hot dry rocks to drill drilling tool technical field, in particular to a kind of hot dry rock high energy hydraulic in-the-hole hammer injection Reaming hole device.
Background technique
Geothermal energy is a kind of widely distributed, rich reserves, renewable, pollution-free, with huge potentiality to be exploited cleaning energy Source.Compared with geothermal resource of hydrothermal type, more geothermal energies be stored in the high heat rock mass that underground has no water or little water formed it is xeothermic Lithotype geothermal energy resources.Simultaneously as geothermal energy resources are contained in hot dry rock, thus relevant hot dry rock drills grinding for development technique The exploitation studied carefully to geothermal energy resources is most important.
Since hot dry rock stratum is usually igneous rock, have the characteristics that bury that depth, drillability are poor, abrasiveness is strong, thus bores Well is the key link of hot dry rock exploitation.Currently, drilling cost accounts for 70% of totle drilling cost or so in hot dry rock development process. Excessively high drilling cost seriously constrains large-scale developing and utilizing for hot dry rock with longer drilling period.
When using DTH drilling abrasiveness strong hot dry rock, down-hole hammer drilling button can gradually wear out failure, wherein Since heel teeth abrasion shortens, actual borehole diameter is caused to reduce, less than the diameter of new down-hole hammer drilling.Usually mention bore more renew Down-hole hammer drilling after want first tripping in rock bit to carry out reaming hole to enable new down-hole hammer drilling to guarantee that bore diameter is consistent Enough smooth tripping in bottom holes.But it needs to carry out lower brill reaming hole using rock bit reaming hole and proposes brill operation, especially for depth drill Into, every time under bore and mention brill and require a great deal of time cost and manpower, financial resources cost, to increase drilling cost, drop Low drilling efficiency.
Summary of the invention
Under for being needed after the down-hole hammer drilling more renewed every time in existing hot dry rock drilling technology Enter rock bit and carry out reaming hole, hot dry rock drilling cost is caused to increase, the lower problem of drilling efficiency, provide it is a kind of it is novel can Lean on for reducing hot dry rock drilling cost, improve the hot dry rock high energy hydraulic in-the-hole hammer injection reaming hole device of drilling efficiency.
The present invention to achieve the above object the technical solution adopted is that: hot dry rock high energy hydraulic in-the-hole hammer spray reaming hole dress Set characterized by comprising outer tube, circlip, nozzle, water-jet circulation road, nozzle cage, down-hole hammer fluid course, valve seat, Spring and steel ball, upper end and the drilling rod of the outer tube are connected through a screw thread, and the lower end of outer tube and hydraulic in-the-hole hammer are connected by screw thread It connects, outer tube, drilling rod and hydraulic in-the-hole hammer coaxial arrangement, the inner sidewall of outer tube is ladder-type structure, in the top tube wall of outer tube The threaded hole for being used to install nozzle cage for being provided with water-jet circulation road and being communicated with water-jet circulation road;In the water-jet circulation road Mandrel line is overlapped with threaded hole central axis, and water-jet circulation road and threaded hole are in tilted layout upwards, water-jet circulation road and threaded hole Central axis and outer tube central axis angle be 20 °~80 °;The nozzle cage, which is connected through a screw thread, is fixed on the threaded hole Interior, nozzle cage and threaded hole are coaxially disposed, and offer the taper spray orifice being gradually increased along water (flow) direction sectional area on nozzle cage;Institute It states nozzle to be mounted in nozzle cage, nozzle and nozzle cage are coaxially disposed, and internal channel, water-jet circulation road and the setting of nozzle are in nozzle Taper spray orifice is interconnected on set;The spring is arranged in the center fluid course of outer tube, and lower spring end rests upon On the inner shoulder table of outer tube lower part;The circlip is mounted on the side wall upper part of outer tube center fluid course;The valve seat installation In outer tube hub fluid course, valve seat bottom face and spring upper end face contact, valve seat inside is equipped with dives along what it was axially penetrated through Drift fluid course, down-hole hammer fluid course are variable-diameter structure, flow to down-hole hammer fluid course along drilling fluid and are divided into three sections, first Section is the cylindrical channel that internal diameter is greater than steel ball size, and second segment is to flow to the truncated cone that internal diameter is gradually reduced along drilling fluid to lead to Road, third section are the cylindrical channel that internal diameter is less than steel ball size,
For steel ball for controlling water-jet circulation road and down-hole hammer fluid course switching, steel ball is not placed on down-hole hammer liquid stream When channel interior, valve seat upper surface is withstood on circlip, and the center fluid course of drilling rod, outer tube and hydraulic in-the-hole hammer is mutual Water-jet circulation road is blocked on connection, valve seat top, and water-jet circulation road is closed;
Steel ball is placed in down-hole hammer fluid course, and down-hole hammer fluid course is closed, and water-jet circulation road is opened.
Further, the water-jet circulation road and screw thread hole number are at least three, and water-jet circulation road and threaded hole enclose It is evenly spaced on around outer tube central axis.
Further, it is provided with external screw thread on the outside of the nozzle cage, the threaded hole in outer tube wall is and the external screw thread phase Matched internal screw thread.
Further, sealing ring is provided between the nozzle and nozzle cage.
Further, the nozzle interior, which is formed with, shrinks accelerating sections and stablizes jet segment, shrinks accelerating sections and is provided with along water The bellmouth that jet direction sectional area is gradually reduced.
Further, the spray orifice of the nozzle is 5mm~15mm apart from rock of borehole distance.
Further, the water-jet outflux initial velocity of the nozzle is 50m/s~150m/s.
Further, Yu Suoshu valve seat outer upper and lower part are respectively equipped with a ring type seal.
Further, the inner hole of the threaded hole is ladder-type structure, and nozzle cage inner wall is ladder-type structure, nozzle and nozzle Set all has inner face and outer end face, and is inner face close to outer tube central axis, and the outer end face of nozzle is withstood in nozzle cage On shoulder, the inner face of nozzle is withstood on threaded hole inner shoulder table, and the outer end face of nozzle cage is equipped with Hexagon hole.
Through the above design, the present invention can be brought the following benefits:
1, the present invention is compared with conventional rock bit reaming hole, for replacement down-hole hammer drilling every time, under reducing once It bores reaming hole operation and proposes brill operation, crept into especially for deep-well and ultradeep well, save plenty of time cost and drilling cost, Improve the drilling efficiency of hot dry rock.
2, the present invention controls the switch of water-jet circulation road and down-hole hammer fluid course using stuff, when not putting into steel ball Down-hole hammer fluid course is opened, and water-jet circulation road is closed, and down-hole hammer is normally crept into;It need to mention when boring more bit change, by drilling rod Center fluid course puts into steel ball, and steel ball is fastened in down-hole hammer fluid course, closes down-hole hammer fluid course, and down-hole hammer stops Work, water-jet circulation road are opened, and can be reaminged hole on one side mentioning while boring;Overall structure is reliable, easy to operate.
3, detritus target can be realized using clear water or filtered drilling fluid when the operation of water jet reaming hole, without another with special With drilling fluid, there is certain economy and simple sexual clorminance.
4, the threaded hole central axis and outer tube central axis angle for installing nozzle cage is 20 °~80 °, screw thread The central axis in hole, nozzle cage and nozzle is overlapped, and the nozzles inclined upwards installation of water jet is conducive to drilling fluid after jet stream detritus By being returned on annular clearance cutting carring between outer tube and the borehole wall.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description explanation does not constitute improper restriction of the invention for understanding the present invention, in the accompanying drawings:
Fig. 1 is the cross-sectional view of the structure that hot dry rock high energy hydraulic in-the-hole hammer proposed by the present invention sprays reaming hole device.
Fig. 2 is that hot dry rock high energy hydraulic in-the-hole hammer proposed by the present invention sprays the structural profile after reaming hole device investment steel ball Figure.
It is respectively marked in figure as follows: 1- outer tube;2- circlip;3- nozzle;4- water-jet circulation road;5- nozzle cage;6- down-the-hole Hammer fluid course into shape;7- sealing ring;8- valve seat;9- spring;10- steel ball.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings It is bright.It should be understood by those skilled in the art that.Specifically described content is illustrative and be not restrictive below, should not be with this It limits the scope of the invention.
As shown in Figures 1 and 2, hot dry rock high energy hydraulic in-the-hole hammer spray reaming hole device, including outer tube 1, circlip 2, Nozzle 3, water-jet circulation road 4, nozzle cage 5, down-hole hammer fluid course 6, sealing ring 7, valve seat 8, spring 9 and steel ball 10, it is described The upper end of outer tube 1 is connected through a screw thread with drilling rod, and lower end and the hydraulic in-the-hole hammer of outer tube 1 are connected through a screw thread, outer tube 1, drilling rod And hydraulic in-the-hole hammer coaxial arrangement, when not putting into steel ball 10, the center fluid course phase of drilling rod, outer tube 1 and hydraulic in-the-hole hammer Intercommunicated, the inner sidewall of outer tube 1 is ladder-type structure, and water-jet circulation road 4 and and water are provided in the top tube wall of outer tube 1 The threaded hole for being used to install nozzle cage 5 that fluidic channel 4 communicates;4 central axis of water-jet circulation road and threaded hole central axis Line is overlapped, and water-jet circulation road 4 and threaded hole are in tilted layout upwards, in the central axis and outer tube 1 of water-jet circulation road 4 and threaded hole Heart axis angle is 20 °~80 °, and water-jet circulation road 4 and screw thread hole number are at least three, water-jet circulation road 4 and threaded hole It is evenly spaced on around 1 central axis of outer tube;The inner hole of the threaded hole is ladder-type structure;The nozzle cage 5 passes through Threaded connection is fixed in the threaded hole, and nozzle cage 5 and threaded hole are coaxially disposed, and 5 inner wall of nozzle cage is ladder-type structure;Institute It states nozzle 3 to be mounted in nozzle cage 5, nozzle 3 and nozzle cage 5 are coaxially disposed, and are sealed by a seal ring between the two, nozzle It is formed with inside 3 and shrinks accelerating sections and stablize jet segment, contraction accelerating sections is provided with to be gradually reduced along water jet direction sectional area Bellmouth, for accelerating to be oriented to the stable jet segment for liquid stream, the spray orifice of nozzle 3 apart from rock of borehole distance be 5mm~ 15mm increases outer tube 1 and well while guaranteeing that the effective reaming hole length of jet stream is greater than heel teeth greatest wear length 1.5mm as far as possible Annular clearance between wall reduces or outer tube 1 is avoided to wear, to guarantee that water jet detritus depth is greater than 1.5mm, the water jet of nozzle 3 Outlet initial velocity is 50m/s~150m/s, and nozzle 3 and nozzle cage 5 all have inner face and outer end face, and close to 1 center of outer tube Axis is inner face, and the outer end face of nozzle 3 is withstood on 5 inner shoulder table of nozzle cage, and the inner face of nozzle 3 withstands on threaded hole inner shoulder table On, the outer end face of nozzle cage 5 is equipped with Hexagon hole, for using allen wrench unloading nozzle cage 5, while setting on nozzle cage 5 Have the taper spray orifice being gradually increased along water (flow) direction sectional area, taper spray orifice, water-jet circulation road 4 on nozzle cage 5 and The internal channel of nozzle 3 is interconnected;The spring 9 is arranged in the center fluid course of outer tube 1, and 9 lower end of spring is against in place In on the inner shoulder table of 1 lower part of outer tube;The circlip 2 is mounted on the side wall upper part of 1 center fluid course of outer tube;The valve seat 8 are mounted in 1 center fluid course of outer tube, 8 bottom face of valve seat and 9 upper end face contact of spring, are equipped with inside valve seat 8 along its axial direction Perforative down-hole hammer fluid course 6, down-hole hammer fluid course 6 are variable-diameter structure, flow to down-hole hammer fluid course 6 along drilling fluid and divide It is three sections, first segment is the cylindrical channel that internal diameter is greater than 10 diameter of steel ball, and second segment is to flow to internal diameter along drilling fluid gradually to subtract Small truncated cone channel, third section are the cylindrical channel that internal diameter is less than 10 diameter of steel ball, and steel ball 10 is for controlling water jet 6 switching of channel 4 and down-hole hammer fluid course, when not being placed with steel ball 10 in down-hole hammer fluid course 6,8 upper surface of valve seat It withstands on circlip 2, the center fluid course of drilling rod, outer tube 1 and hydraulic in-the-hole hammer is interconnected, water-jet circulation road 4 Water flow is separated by 8 top of valve seat, and water-jet circulation road 4 is closed, and circlip 2 is used to prevent valve seat 8 from popping up under spring force, When being placed with steel ball 10 in down-hole hammer fluid course 6, down-hole hammer fluid course 6 is closed, and water-jet circulation road 4 is opened, and drilling fluid is logical It crosses nozzle 3 and forms water jet rock breaking hole wall rock, realize reaming hole operation, one ring is respectively installed in 8 outer upper of valve seat and lower part Shape sealing ring 7 prevents water flow when hydro-hammer drilling from leaking by water-jet circulation road 4, influences hydraulic in-the-hole hammer working performance.
Specific water-jet circulation road 4 and 6 switching process of down-hole hammer fluid course are as follows: as shown in Figure 1, drilling work When, steel ball 10 is not put into, and liquid stream passes sequentially through kelly bar central liquid circulation road, 1 upper end center fluid course of outer tube and down-the-hole It hammers fluid course 6 into shape to enter in the hydraulic in-the-hole hammer of lower section, hydraulic in-the-hole hammer works normally drilling, at this time water jet in 1 tube wall of outer tube Channel 4 cooperates sealing ring 7 to close by 8 upper end of valve seat, therefore water flow is separated by 8 top of valve seat when not putting into steel ball 10. As shown in Fig. 2, putting into steel ball by top rod center fluid course when drilling terminates to need replacing new down-hole hammer drilling 10, ground water pump is opened simultaneously, adjusts to suitable low discharge and works, steel ball 10 is under gravity and hydraulic action, along drilling rod Center fluid course moves downward, and is finally stuck in the down-hole hammer fluid course 6 of valve seat 8, observes water-aspirator pressure table in real time, works as water Flow can be incrementally increased when pump pressure meter pressure rapid increase, steel ball 10 compresses valve seat 8 under the action of water pressure, so that cutting is latent Drift fluid course 6.Hydraulic pressure persistently increases, and pushes steel ball 10 and the downward compressed spring 9 of valve seat 8, gradually increases with to bottom offset Greatly, water-jet circulation road 4 is finally opened, drilling fluid forms high-speed water jet by nozzle 3 and is crushed hole wall rock, realizes that reaming hole is made Industry.
Hot dry rock high energy hydraulic in-the-hole hammer injection reaming hole device working principle proposed by the present invention is as follows: hot dry rock creeps into rock Layer is mostly the granite of abrasiveness height, drillability difference.Drill bit heel teeth is gradually worn out during hydro-hammer drilling, causes to drill Reduced diameter, after drill bit failure replacement is with diameter drill bit, since bore diameter reduces, green bit can not tripping in.Research It was found that the granite borehole wall after hydraulic in-the-hole hammer rotary-percussive drilling is there are a large amount of micro-cracks and micro- broken, borehole wall surface layer can be with It is delineated by pocket knife, borehole wall surface layer catalase difficulty is greatly reduced.It, can be in hydro-hammer drilling by implementing the technical program It mentions during boring more bit change, closes down-hole hammer fluid course 6 by putting into 10 mode of steel ball, open simultaneously in 1 tube wall of outer tube Water-jet circulation road 4 is crushed hole wall rock using high-speed water jet, realizes reaming hole operation, it is not necessary to use tooth after replacing green bit Drill bit reaming hole again is taken turns, the primary lower process bored reaming hole and mention brill is eliminated and has been saved a large amount of especially to deep-well and ultradeep well Time cost and drilling cost improve the drilling efficiency of hot dry rock.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, patent protection model of the invention It encloses and is subject to claims, all equivalent constructions variations done with specification and accompanying drawing content of the invention, similarly It should be included within the scope of the present invention.

Claims (9)

1. hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device characterized by comprising outer tube, circlip, nozzle, water Fluidic channel, nozzle cage, down-hole hammer fluid course, valve seat, spring and steel ball, the upper end of the outer tube and drilling rod are connected by screw thread Connect, lower end and the hydraulic in-the-hole hammer of outer tube are connected through a screw thread, outer tube, drilling rod and hydraulic in-the-hole hammer coaxial arrangement, outer tube it is interior Side wall is ladder-type structure, and water-jet circulation road is provided in the top tube wall of outer tube and is used for what water-jet circulation road communicated The threaded hole of nozzle cage is installed;Water jet channel center axis is overlapped with threaded hole central axis, water-jet circulation road and spiral shell Pit is in tilted layout upwards, and the central axis and outer tube central axis angle of water-jet circulation road and threaded hole are 20 °~80 °;Institute It states nozzle cage and is connected through a screw thread and be fixed in the threaded hole, nozzle cage and threaded hole are coaxially disposed, and are offered on nozzle cage The taper spray orifice being gradually increased along water (flow) direction sectional area;The nozzle is mounted in nozzle cage, and nozzle is coaxially set with nozzle cage It sets, internal channel, water-jet circulation road and the taper spray orifice being arranged on nozzle cage of nozzle are interconnected;The spring setting is outside In the center fluid course of pipe, lower spring end is rested upon on the inner shoulder table of outer tube lower part;The circlip is mounted on outer The side wall upper part of tube hub fluid course;The valve seat is mounted in the fluid course of outer tube center, on valve seat bottom face and spring End face contact, valve seat inside are equipped with the down-hole hammer fluid course axially penetrated through along it, and down-hole hammer fluid course is variable-diameter structure, edge Drilling fluid flows to down-hole hammer fluid course and is divided into three sections, and first segment is the cylindrical channel that internal diameter is greater than steel ball size, second segment To flow to the truncated cone channel that internal diameter is gradually reduced along drilling fluid, third section is that internal diameter is logical less than the cylinder of steel ball size Road;
For steel ball for controlling water-jet circulation road and down-hole hammer fluid course switching, steel ball is not placed on down-hole hammer fluid course When internal, valve seat upper surface is withstood on circlip, and the center fluid course of drilling rod, outer tube and hydraulic in-the-hole hammer mutually connects Logical, water-jet circulation road is blocked on valve seat top, and water-jet circulation road is closed;
Steel ball is placed in down-hole hammer fluid course, and down-hole hammer fluid course is closed, and water-jet circulation road is opened.
2. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the water-jet Circulation road and screw thread hole number are at least three, and water-jet circulation road and threaded hole surround outer tube central axis uniform intervals point Cloth.
3. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the nozzle Set outside is provided with external screw thread, and the threaded hole in outer tube wall is the internal screw thread to match with the external screw thread.
4. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the nozzle Sealing ring is provided between nozzle cage.
5. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the nozzle Inside is formed with shrinks accelerating sections and stablizes jet segment, shrinks accelerating sections and is provided with and is gradually reduced along water jet direction sectional area Bellmouth.
6. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the nozzle Spray orifice apart from rock of borehole distance be 5mm~15mm.
7. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the nozzle Water-jet outflux initial velocity be 50m/s~150m/s.
8. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that Yu Suoshu valve Seat outer upper and lower part are respectively equipped with a ring type seal.
9. hot dry rock high energy hydraulic in-the-hole hammer according to claim 1 sprays reaming hole device, which is characterized in that the screw thread The inner hole in hole is ladder-type structure, and nozzle cage inner wall is ladder-type structure, and nozzle and nozzle cage all have inner face and outer end face, And close outer tube central axis is inner face, the outer end face of nozzle is withstood on nozzle cage inner shoulder table, and the inner face of nozzle is withstood on On threaded hole inner shoulder table, the outer end face of nozzle cage is equipped with Hexagon hole.
CN201910720828.7A 2019-08-06 2019-08-06 Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device Pending CN110318677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910720828.7A CN110318677A (en) 2019-08-06 2019-08-06 Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910720828.7A CN110318677A (en) 2019-08-06 2019-08-06 Hot dry rock high energy hydraulic in-the-hole hammer sprays reaming hole device

Publications (1)

Publication Number Publication Date
CN110318677A true CN110318677A (en) 2019-10-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112227985A (en) * 2020-10-12 2021-01-15 中国科学院武汉岩土力学研究所 Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112227985A (en) * 2020-10-12 2021-01-15 中国科学院武汉岩土力学研究所 Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method
CN112227985B (en) * 2020-10-12 2021-10-22 中国科学院武汉岩土力学研究所 Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method

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