CN110273662A - A kind of dry hole packing plug controlled valve - Google Patents
A kind of dry hole packing plug controlled valve Download PDFInfo
- Publication number
- CN110273662A CN110273662A CN201910724522.9A CN201910724522A CN110273662A CN 110273662 A CN110273662 A CN 110273662A CN 201910724522 A CN201910724522 A CN 201910724522A CN 110273662 A CN110273662 A CN 110273662A
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- valve body
- fluid channel
- piston
- cavity
- spacing collar
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- 238000012856 packing Methods 0.000 title abstract description 46
- 239000012530 fluid Substances 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims description 16
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 230000035772 mutation Effects 0.000 claims description 2
- 208000005189 Embolism Diseases 0.000 abstract description 52
- 238000005553 drilling Methods 0.000 abstract description 29
- 238000012360 testing method Methods 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 7
- 239000011435 rock Substances 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of dry holes to insulate plug controlled valve, and control valve includes detent variable diameter, spacing collar, piston and the valve body of coaxial arrangement；Detent variable diameter is arranged inside spacing collar, and the top of spacing collar is stretched out in the upper end；Valve body is located at below spacing collar and is firmly connected with it；The first cavity is provided in valve body, piston upper and lower ends are respectively protruding into spacing collar and the first inside cavity；Detent variable diameter is internally provided with water passage, and the inlet opening docked with water passage is provided on piston, and the apopore being connected with inlet opening is provided on piston, and apopore is connected to the first cavity；Valve body is arranged at intervals with the first fluid channel, second fluid channel and discharge channel being connected with the first cavity from top to bottom.Advantage is: it realizes under single channel hydraulic fracturing pressuring method, it, being capable of the development water pressure supporing test in dry hole and low water level drilling respectively to packing embolism, fracturing section pressurization and release by relying on promotion and the whereabouts of the control valve.
Description
Technical field
The present invention relates to hydraulic fracturing stress measurement fields more particularly to a kind of dry hole to insulate plug controlled valve.
Background technique
Crustal stress is the natural stress being present in stratum, it is that underground power house and other underground engineerings is caused to deform, is broken
Bad basic active force.Therefore, the size of crustal stress, direction directly influence the stability of underground engineering wall rock, measure underground
Engineering primary stress, the stress distribution for studying country rock are characterized in carrying out underground engineering wall rock stability analysis and realize underground work
The scientific prerequisite of journey excavation design.Hydraulic fracturing is the most widely used most common method of geostress survey, this
The principle of method is to insulate one section of rock body drilled in scheduled test depth using a pair of expandable rubber embolism, then to
It insulates section and injects liquid medium, fluid pressure gradually rises, and oppresses the rock mass insulated and ruptures, in turn, according to pressure break mistake
Fluid pressure eigenvalue of curve in journey obtains the crustal stress size and Orientation of measuring section.
Hydraulic fracturing geostress survey has two kinds of liquid pressing modes of single channel and binary channels, wherein single-pass Dow process equipment
Simply, easy for assemble or unload.When single channel is tested, first have to insulate embolism pressurization, upper and lower two rubber to rubber by drilling rod
Embolism expands simultaneously, and the drilling rock mass that the rubber embolism expanded by the two insulates is test section, on the upper packing embolism of decentralization
The control valve of side, switching fluid channel arrive test section, carry out pump liquid to test section and suppress that (two rubber insulate embolism up and down at this time
It is still expansion state of pressure keeping), until packing section drilling rock masses fracturing, the fluid pressure variation song being pumped into during record test
Line calculates crustal stress size according to characteristic value, and this completes one section of tests；Promote drilling rod and control valve later, make drilling rod with
Rubber insulates embolism connection, lays down the pressure in packing embolism, it is made to restore to the original state under natural resiliency state, carry out next section
Test.
The device to pressurize to equipment is located at aperture ground, when test section is deeper, if anhydrous in drilling hole, and connect and adds
It is full water state in the drilling rod of pressure device and packing embolism, does not have external water pressure outside the embolism of rubber packing at this time, it is internal to bear
Water column internal water pressure in kelly bar, packing embolism can not restore to the original state under water column pressure, are in swelling state, are close to hole
Wall forms bit freezing phenomenon, can not move up and down and carry out next survey section test job, lift by force, be easy to cause packing embolism
Damaged even equipment is broken off.Therefore, in the case where dry hole, low water level or stratum leak serious conditions, progress difficulty of test is non-
Chang great, or even failure, equipment damage are caused, the prior art uses limited.
Summary of the invention
The purpose of the present invention is to provide a kind of dry hole insulate plug controlled valve, thus solve it is existing in the prior art before
State problem.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of dry hole packing plug controlled valve, the control valve include the detent variable diameter of coaxial arrangement, spacing collar, piston
And valve body；The spacing collar inner hollow and lower end opening are arranged, and the detent variable diameter is arranged inside the spacing collar,
And the top of the spacing collar is stretched out in the upper end；The valve body is located at below the spacing collar and is firmly connected with it；Institute
State and be provided in valve body coaxially and the first cavity at the top of it, the piston upper and lower ends respectively correspond protrude into it is described
Inside spacing collar and first inside cavity, and the upper surface of the piston is corresponding with the lower surface of the detent variable diameter connects
Touching is fixed；The detent variable diameter is internally provided with the water passage for coaxially and running through its upper and lower ends, sets on the piston
It is equipped with coaxial inlet opening, the inlet opening is docked through the top of the piston with the water passage, the piston
On be provided with the apopore being connected with the inlet opening, the apopore is connected to first cavity；The valve body from upper and
Under be arranged at intervals with the first fluid channel, second fluid channel and discharge channel being connected with first cavity, the piston
It is moved up and down in first cavity, to enable the apopore and the first fluid channel or second fluid channel or release
Channel connection.
Preferably, the first fluid channel and the second fluid channel extend from top to bottom；And it is described first-class
Body channel and the second fluid channel being radially separated by a certain distance in the valve body, the first fluid channel and described
Second fluid channel is separated by a certain distance with the valve interior wall.
Preferably, the second cavity of its bottom is provided with coaxially and run through in the valve body, second cavity
Top and the bottom of first cavity are separated by a certain distance；The elongated end and the second fluid in the first fluid channel are logical
The elongated end in road is connected to second cavity.
Preferably, the first cavity of connection and extraneous gas vent are provided on the valve body, the gas vent is along the valve
Body radially extends；The gas vent is located at the second fluid channel and first valve on the axis direction of the valve body
The lower section of body tie point.
Preferably, the discharge channel radially extending along the valve body, and the discharge channel is connected to first chamber
Body and the external world.
Preferably, the spacing collar is in cylinder type, and its lower end edge its project radially outward that extend to form diameter prominent
The rotary table of change, the upper surface of the rotary table with the spacing collar top lower surface is corresponding contacts fitting, the outer wall of the rotary table
It is contacted with the corresponding fitting of the inner wall of the spacing collar.
Preferably, the outer wall of the piston is contacted with the corresponding fitting of the inner wall of the valve body, the diameter of first cavity
Less than the internal diameter of the spacing collar, the outer wall of the piston and the inner wall of the spacing collar are separated by a certain distance.
Preferably, at least four seal grooves are arranged at intervals on the valve body from top to bottom, the seal groove is from institute
It states valve interior wall and radially outwardly protrudes extension, sealing ring or phenyl tetrafluoride pad are provided in the seal groove；The sealing ring
Slot is separately positioned between the first fluid channel and the body top, the first fluid channel and the discharge channel
Between, between the discharge channel and the second fluid channel, below the second fluid channel；And along the valve axis
The seal groove that direction is in most downstream is located at the top of first cavity bottom.
Preferably, the apopore is connected with the elongated end of the inlet opening, and the apopore is between the piston circumferential direction
Every being uniformly arranged, and radially extending along the piston, the number of the apopore are at least eight.
Preferably, the top end of the valve body is radially recessed to form the step that diameter is mutated to the direction close to its axis,
The body top correspondence protrudes into inside the spacing collar, and the upper surface of the lower surface of the spacing collar and the step
Corresponding contact, the top end of the valve body periphery wall with the inner wall of spacing collar is corresponding contacts, the spacing collar and the valve body pass through
Fastener is fixedly connected.
The beneficial effects of the present invention are: the 1, present invention is stopped by controlling piston in the valve inner different location, make
Inlet opening is connected to first fluid channel, second fluid channel or discharge channel respectively, to realize the pressurization to three channels
And release, realize that the filling liquid to packing embolism is suppressed, stops liquid pressure maintaining and release effect.2, the present invention overcomes the skills of existing equipment
Art defect realizes under single channel hydraulic fracturing pressuring method, by relying on promotion and the whereabouts of the control valve, respectively to envelope
It is easy to operate easily controllable every embolism, fracturing section pressurization and release, hydrofracturing can be carried out in dry hole and low water level drilling
Geostress survey test, stable testing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of control valve in the embodiment of the present invention；
Fig. 2 is that control valve and drilling rod and packing embolism dock the structural schematic diagram used in the embodiment of the present invention.
In figure: 1, detent variable diameter；11, water passage；12, rotary table；2, spacing collar；3, piston；31, inlet opening；32, go out
Water hole；4, valve body；41, the first cavity；42, the second cavity；43, first fluid channel；44, second fluid channel；45, release is logical
Road；46, gas vent；5, upper packing embolism；51, upper cavity；52, limitation ring；53, through-hole；6, lower packing embolism；61, lower chamber；
7, drilling rod；71, water injection hole；8, rock body drilled；9, connecting tube；91, pressure break floral tube；10, pressure break steel pipe.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to
Limit the present invention.
A kind of dry hole packing plug controlled valve is provided as shown in Fig. 1 to 2, in the present embodiment, the control valve includes same
Detent variable diameter 1, spacing collar 2, piston 3 and the valve body 4 of axis setting；2 inner hollow of spacing collar and the setting of lower end opening,
The detent variable diameter 1 is arranged inside the spacing collar 2, and the top of the spacing collar 2 is stretched out in the upper end；The valve body
4 are located at 2 lower section of spacing collar and are firmly connected with it；It is provided in the valve body 4 coaxially and at the top of it
First cavity 41,3 upper and lower ends of piston, which respectively correspond, to be protruded into 2 inside of spacing collar and first cavity 41
Portion, and the upper surface of the piston 3 with the lower surface of the detent variable diameter 1 is corresponding contacts fixation；It is set inside the detent variable diameter 1
It is equipped with coaxially and is run through the water passage 11 of its upper and lower ends, is provided with coaxial inlet opening 31 on the piston 3,
The inlet opening 31 is docked through the top of the piston 3 with the water passage 11, be provided on the piston 3 with it is described into
The connected apopore 32 in water hole 31, the apopore 32 are connected to first cavity 41；The valve body 4 is spaced sets from top to bottom
It is equipped with the first fluid channel 43, second fluid channel 44 and discharge channel 45 being connected with first cavity 41, the piston 3
It is moved up and down in first cavity 41, to enable the apopore 32 and the first fluid channel 43 or second fluid channel
44 or discharge channel 45 be connected to.
In the present embodiment, when using the control valve, need for the control valve to be placed in rock body drilled 8, institute
It states control valve and the drilling to be coaxially disposed, the control valve is located at subsurface, and by the detent on drilling rod 7 and the control valve
Variable diameter 1 docks, and drilling rod 7 and the detent variable diameter 1 are coaxial, and the bottom of the drilling rod 7 is corresponding with the top of the detent variable diameter 1
Contact is fixed, its axial direction is provided with the water injection hole 71 through its upper and lower ends in the drilling rod 7, the water injection hole 71 with it is described
The water passage 11 of detent variable diameter 1 is docked, and water flow is introduced into the inlet opening 31 of piston 3.
In the present embodiment, the first fluid channel 43 and the second fluid channel 44 extend from top to bottom；And institute
State first fluid channel 43 and the second fluid channel 44 being radially separated by a certain distance in the valve body 4, described first
Fluid channel 43 and the second fluid channel 44 are separated by a certain distance with 4 inner wall of valve body.
In the present embodiment, be provided in the valve body 4 coaxially and run through its bottom the second cavity 42, described second
The top of cavity 42 and the bottom of first cavity 41 are separated by a certain distance；The elongated end in the first fluid channel 43 and institute
The elongated end for stating second fluid channel 44 is connected to second cavity 42.
In the present embodiment, the first fluid channel 43 extends vertically from top to bottom along the axis direction of the valve body 4, and
It is connected to second cavity 42；The second fluid channel 44 extends vertically from top to bottom along the axis direction of the valve body 4
One section, its elongated end extends along the radial direction to close to 4 axis of valve body of the valve body 4 later, later again along the valve
4 axis direction of body extends straight down, and the elongated end and the valve body 4 are coaxial, and are connected to second cavity 42.
In the present embodiment, at least four seal grooves 48, the sealing ring are arranged at intervals on the valve body 4 from top to bottom
Slot 48 radially outwardly protrudes extension from 4 inner wall of valve body, is provided with sealing ring or phenyl tetrafluoride pad in the seal groove 48；
The seal groove 48 is separately positioned between 4 top of the first fluid channel 43 and the valve body, the first fluid is logical
Between road 43 and the discharge channel 45, between the discharge channel 45 and the second fluid channel 44, the second fluid
44 lower section of channel；And it is located at 41 bottom of the first cavity along the seal groove 48 that 4 axis direction of valve body is in most downstream
Top.
In the present embodiment, the radially extending along the valve body 4 of discharge channel 45, and the discharge channel 45 is connected to institute
State the first cavity 41 and the external world.
In the present embodiment, setting there are four seal groove 48, this four seal grooves 48 by the first fluid channel 43,
Second fluid channel 44 and discharge channel 45 are separated, ensure that uniqueness of each channel when being connected to apopore 32,
It avoids water from flowing through the outflow of other channels, influences the normal work of control valve.By the sealing ring in this four seal grooves 48 from upper
Successively it is known as the first sealing ring, the second sealing ring, third sealing ring and the 4th sealing ring under and.
In the present embodiment, when using the control valve, need for be connected with rubber packing embolism the lower end of control valve, first
Upper and lower two rubber packing embolism is placed into rock body drilled 8 along the axis of rock body drilled 8, two rubber packing embolisms are at it
It is separated by a certain distance on axis direction, insulates be provided with coaxial pressure break steel pipe 10, upper packing bolt inside embolism 6 up and down
The top of pressure break steel pipe 10 inside plug 5 contacts fixation, and the pressure break steel with the top of the second cavity 42 in control valve body 4
The connection corresponding with the second fluid channel 44 of pipe 10.Pressure break steel pipe 10 in upper packing embolism 5 is through pressure break floral tube 91 and lower envelope
It is connected to every pressure break steel pipe 10 in embolism 6.The pressure break floral tube 91 is coaxially disposed with pressure break steel pipe 10.Upper and lower two rubber insulates bolt
Plug is internal to be respectively arranged with coaxial upper cavity 51 and lower chamber 61, the outer wall of the pressure break steel pipe 10 in upper packing embolism 5
It is separated by a distance between the inner wall of upper packing embolism 5；The outer wall and lower packing bolt of pressure break steel pipe 10 in lower packing embolism 6
It is separated by a distance between the inner wall of plug 6；The outer wall of pressure break floral tube 91 and the inner wall of connecting tube 9 are also separated by certain distance.Upper envelope
Every the top of embolism 5, through limitation ring 52, the bottom of valve body 4 is corresponding is fixedly connected with control, and upper 5 bottom of packing embolism is arranged with
Limitation ring 52, lower 6 top and bottom of packing embolism are arranged with limitation ring 52, and the limitation ring 52 of upper packing 5 bottom of embolism is under
The limitation ring 52 for insulating 6 top of embolism is connected through connecting tube 9.The through-hole 53 through its upper and lower ends is provided in limitation ring 52,
The upper and lower ends of the connecting tube 9 respectively with it is upper packing 5 bottom of embolism limitation ring 52 on through-hole 53 and lower packing embolism 6 top
Through-hole 53 in the limitation ring 52 in portion is connected to.Connecting tube 9 is parallel with pressure break floral tube 91 and certain apart in the radial direction in valve body 4
Distance.
In the present embodiment, the first cavity of connection 41 and extraneous gas vent 46, the gas vent are provided on the valve body 4
46 radially extending along the valve body 4；It is logical that the gas vent 46 is located at the second fluid on the axis direction of the valve body 4
The lower section in road 44 and 4 tie point of the first valve body.
In the present embodiment, the setting of the gas vent 46 can will be outside the bleed air valve body 4 that stored in the first cavity 41.
In the present embodiment, the detent variable diameter 1 is in cylinder type, and its lower end edge its project radially outward extend to form it is straight
The rotary table 12 of diameter mutation, the upper surface of the rotary table 12 with 2 top lower surface of spacing collar is corresponding contacts fitting, the circle
The outer wall of platform 12 is contacted with the corresponding fitting of the inner wall of the spacing collar 2.
In the present embodiment, the top of the detent variable diameter 1 is corresponding with drilling rod 7 to be fixedly connected.
In the present embodiment, the outer wall of the piston 3 is contacted with the corresponding fitting of the inner wall of the valve body 4, first cavity
41 diameter is less than the internal diameter of the spacing collar 2, and the inner wall of the outer wall of the piston 3 and the spacing collar 2 is at a distance of certain
Distance.The diameter of first cavity 41 is slightly larger than the diameter of piston 3, that is to say, that the diameter of piston 3 is less than spacing collar 2
Internal diameter can enable piston 3 freely move up and down in spacing collar 2, frictional impact will not occur with spacing collar 2, thus shadow
Ring the normal work of control valve.
In the present embodiment, the apopore 32 is connected with the elongated end of the inlet opening 31, and the apopore 32 is along described
Piston 3 is circumferentially-spaced to be uniformly arranged, and radially extending along the piston 3, and the number of the apopore 32 is at least eight.Out
The number in water hole 32 can self-setting as the case may be, to guarantee that control valve has better using effect.
In the present embodiment, the apopore 32 is disposed in an evenly spaced relation in the piston 3 circumferentially, and apopore 32 was along piston 3 weeks
It can guarantee that apopore 32 can be with first fluid channel 43, second fluid channel 44 and discharge channel to the set-up mode of setting
45 docking.
In the present embodiment, 4 top of valve body radially is recessed to form what diameter was mutated to the direction close to its axis
Step 47, correspondence protrudes into inside the spacing collar 2 at the top of the valve body 4, and the lower surface of the spacing collar 2 with described
The corresponding contact in the upper surface of rank 47, the 4 top periphery wall of valve body with the inner wall of spacing collar 2 is corresponding contacts, the limit sleeve
Cylinder 2 is fixedly connected with the valve body 4 through fastener.The outer wall of the spacing collar 2 and the 4 diameter phase of valve body below of step 47
Together.Can guarantee control valve so from top to bottom is all that uniformly, can preferably be bonded with rock body drilled 8, avoid control valve
It is placed in rock body drilled 8 diameter Different Effects, influences test effect.
In the present embodiment, piston 3 can move up and down in valve body 4, to be in different stations.When piston 3 is in upper
Station, the first sealing ring and the second sealing ring work, at this point, the apopore 32 of piston 3 is connected with first fluid channel 43, it is living
Water flow in the inlet opening 31 of plug 3 can then enter in first fluid channel 43, and through on first fluid channel 43 and limitation ring 52
Through-hole 53 enter it is upper packing embolism 5 in upper cavity 51, then through it is upper packing embolism 5 and connecting tube 9 between limitation ring 52
On through-hole 53 enter connecting tube 9 in, then through connecting tube 9 and it is lower packing embolism 6 between limitation ring 52 on through-hole 53 enter
In the lower chamber 61 of lower packing embolism 6.When piston 3 is moved down in middle station, the second sealing ring and third sealing are enclosed
Effect, the apopore 32 of piston 3 are connected with discharge channel 45, and the water flow in the inlet opening 31 of piston 3 can then enter discharge channel
In 45, water flow is then outside exits valve body 4, control valve release.When piston 3 is moved down in lower station, third sealing ring and
4th sealing ring works, and the apopore 32 of piston 3 is connected with second fluid channel 44, the water flow in the inlet opening 31 of piston 3
It can then enter in second fluid channel 44, and enter in the pressure break steel pipe 10 of upper packing embolism 5, enter pressure break floral tube 91 later
It is interior, it enters back into the pressure break steel pipe 10 of lower packing embolism 6.
In the present embodiment, when piston 3 is in upper station, the high-pressure fluid that ground compressing device high-pressure pump is got at this time passes through
The water injection hole 71 of drilling rod 7 enters inlet opening 31, enters first fluid channel 43 by apopore 32 later, and then to upper and lower two
Packing embolism pressurize, insulate embolism pressurized expansion, when two packing embolisms all by compression swelling after, will test fracturing section rock mass
Drilling 8 is completely enclosed.
It when piston 3 is in lower station, is pressurizeed to fracturing section at this time in the present embodiment, drilling rod 7 passes through detent variable diameter
1, piston 3 is connected to the second fluid channel 44 in valve body 4, and high-pressure fluid enters upper packing embolism by second fluid channel 44
5 pressure break steel pipe 10, the pressure break floral tube 91 of connecting tube 9, into the pressure break steel pipe 10 of lower packing embolism 6, complete to test section
High pressure fracture test.
In the present embodiment, when piston 3 is located at middle station, drilling rod 7 passes through detent variable diameter 1, piston 3 and unloading on valve body 4
Pressure passageway 45 is connected to, and at this time the fluid in drilling rod 7 can be discharged by discharge channel 45, be made 7 internal and external pressure balance of drilling rod, continue
Drilling rod 7 is promoted, so that piston 3 is again positioned at station, connection packing embolism and drilling rod 7, is constantly promoted by ground, transfers piston
3, switching drilling rod 7 is connect with discharge channel 45 and packing embolism, is finally made to insulate embolism release reinstatement, is carried out next survey section
Work.
By using above-mentioned technical proposal disclosed by the invention, following beneficial effect has been obtained:
The present invention provides a kind of dry holes to insulate plug controlled valve, by the way that control valve is docked with drilling rod and packing embolism,
Fluid is injected into control valve through drilling rod, fluid is entered in packing embolism by control valve, realizes the high pressure fracture to test section
Test.This control valve is stopped by controlling piston in the valve inner different location, keeps inlet opening logical with first fluid respectively
Road, second fluid channel or discharge channel connection are realized to realize the pressurization and release to three channels to packing embolism
Filling liquid is suppressed, stops liquid pressure maintaining and release effect.Meanwhile the present invention overcomes the technological deficiency of existing equipment, single channel is realized
Under hydraulic fracturing pressuring method, by by the control valve promotion and whereabouts, respectively to packing embolism, fracturing section pressurization and
Release, it is easy to operate easily controllable, water pressure supporing test, test can be carried out in dry hole and low water level drilling
Stablize.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
Depending on protection scope of the present invention.
Claims (10)
1. a kind of dry hole insulates plug controlled valve, it is characterised in that: the control valve includes the detent variable diameter of coaxial arrangement, limit
Sleeve, piston and valve body；The spacing collar inner hollow and the setting of lower end opening, the detent variable diameter setting is in the limit
Sleeve inner, and the top of the spacing collar is stretched out in the upper end；The valve body is located at below the spacing collar and consolidates with it
Fixed connection；It is provided in the valve body coaxially and the first cavity at the top of it, the piston upper and lower ends is right respectively
The spacing collar inside and first inside cavity should be protruded into, and under the upper surface of the piston and the detent variable diameter
The corresponding contact in surface is fixed；The detent variable diameter is internally provided with the water passage for coaxially and running through its upper and lower ends, institute
It states and is provided with coaxial inlet opening on piston, top and the water passage pair of the inlet opening through the piston
It connects, the apopore being connected with the inlet opening is provided on the piston, the apopore is connected to first cavity；It is described
It is logical that valve body is arranged at intervals with the first fluid channel, second fluid channel and release being connected with first cavity from top to bottom
Road, the piston move up and down in first cavity, to enable the apopore and the first fluid channel or second
Body channel or discharge channel connection.
2. dry hole according to claim 1 insulates plug controlled valve, it is characterised in that: the first fluid channel and described
Second fluid channel extends from top to bottom；And the first fluid channel and the second fluid channel are in the diameter of the valve body
It is separated by a certain distance upwards, the first fluid channel and the second fluid channel are with the valve interior wall at a distance of a spacing
From.
3. dry hole according to claim 2 insulates plug controlled valve, it is characterised in that: be provided in the valve body same with it
Axis and the second cavity for running through its bottom, the top of second cavity and the bottom of first cavity are separated by a certain distance；
The elongated end in the first fluid channel and the elongated end in the second fluid channel are connected to second cavity.
4. dry hole according to claim 3 insulates plug controlled valve, it is characterised in that: be provided with connection the on the valve body
One cavity and extraneous gas vent, the gas vent are radially extended along the valve body；Axis of the gas vent in the valve body
It is located at the lower section in the second fluid channel and the first valve body tie point on line direction.
5. dry hole according to claim 4 insulates plug controlled valve, it is characterised in that: the discharge channel is along the valve body
Radially extend, and the discharge channel is connected to first cavity and extraneous.
6. dry hole according to any one of claims 1 to 5 insulates plug controlled valve, it is characterised in that: the spacing collar is in
Cylinder type, and its lower end edge its project radially outward the rotary table for extending to form diameter mutation, the upper surface of the rotary table and institute
The corresponding contact fitting of spacing collar top lower surface is stated, the fitting corresponding with the inner wall of the spacing collar of the outer wall of the rotary table connects
Touching.
7. dry hole according to claim 6 insulates plug controlled valve, it is characterised in that: the outer wall of the piston and the valve
The corresponding fitting contact of the inner wall of body, the diameter of first cavity are less than the internal diameter of the spacing collar, the outer wall of the piston
It is separated by a certain distance with the inner wall of the spacing collar.
8. dry hole according to claim 1 insulates plug controlled valve, it is characterised in that: be spaced from top to bottom on the valve body
At least four seal grooves are provided with, the seal groove radially outwardly protrudes extension from the valve interior wall, described close
Sealing ring or phenyl tetrafluoride pad are provided in seal slot；The seal groove is separately positioned on the first fluid channel and the valve body
Between top, between the first fluid channel and the discharge channel, the discharge channel and the second fluid channel it
Between, below the second fluid channel；And it is located at described first along the seal groove that the valve axis direction is in most downstream
The top of cavity bottom.
9. dry hole according to claim 1 insulates plug controlled valve, it is characterised in that: the apopore and the inlet opening
Elongated end be connected, the apopore is uniformly arranged along the piston is circumferentially-spaced, and radially extending along the piston, described
The number of apopore is at least eight.
10. dry hole according to claim 1 insulates plug controlled valve, it is characterised in that: the top end of the valve body is radially
It is recessed to form the step that diameter is mutated to the direction close to its axis, the body top correspondence protrudes into the spacing collar
Portion, and the lower surface of the spacing collar with the upper surface of the step is corresponding contacts, the top end of the valve body periphery wall and limit
The corresponding contact of the inner wall of sleeve, the spacing collar are fixedly connected with the valve body through fastener.
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| CN111502589A (en) * | 2020-04-23 | 2020-08-07 | 中国地质科学院地质力学研究所 | Packer for measuring ground stress by hydraulic fracturing method |
| CN115726724A (en) * | 2022-11-29 | 2023-03-03 | 中国电建集团贵阳勘测设计研究院有限公司 | Pressure relief device and pressure relief method for dry hole packer |
| CN116818545A (en) * | 2023-08-29 | 2023-09-29 | 中国电建集团北京勘测设计研究院有限公司 | Pressure-relief water drainage system and method for hydraulic fracturing ground stress test die device |
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