CN108150122A - A kind of mud shale chip resistant self set-up type chilled sampling apparatus and its sampling method - Google Patents
A kind of mud shale chip resistant self set-up type chilled sampling apparatus and its sampling method Download PDFInfo
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- CN108150122A CN108150122A CN201810171877.5A CN201810171877A CN108150122A CN 108150122 A CN108150122 A CN 108150122A CN 201810171877 A CN201810171877 A CN 201810171877A CN 108150122 A CN108150122 A CN 108150122A
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- 238000005070 sampling Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005553 drilling Methods 0.000 claims abstract description 43
- 230000008014 freezing Effects 0.000 claims abstract description 42
- 238000007710 freezing Methods 0.000 claims abstract description 42
- 239000011435 rock Substances 0.000 claims abstract description 41
- 230000009471 action Effects 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000013467 fragmentation Methods 0.000 claims abstract description 7
- 238000006062 fragmentation reaction Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 241000239290 Araneae Species 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000003139 buffering effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 150000004677 hydrates Chemical class 0.000 abstract description 2
- 239000004058 oil shale Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 29
- 238000005516 engineering process Methods 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003079 shale oil Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000024287 Areas Species 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/10—Formed core retaining or severing means
Abstract
The invention discloses a kind of mud shale chip resistant self set-up type chilled sampling apparatus and its sampling methods, and by reducing joint, shunt connector, adjusting single action mechanism, outer tube, rock core is breakage-proof and low-temperature receiver starts core mechanism, reamer, rock core card breaking mechanism and drill bit and forms；The present invention has the function of chip resistant, is particularly suitable for the boring sample of easy fragmentation stratum such as mud shale, oil shale, shale gas, gas hydrates and coal bed gas etc.；The present invention need to only be arranged as required to the pressure value of different refrigerating capacities and valve when different rock-layers and different depth sample, easy to operate, and it is suitable for a plurality of types of low-temperature receivers, applied widely；Using bottom hole self set-up type freezing method, manual operation can be reduced, improves efficiency；There is warning function after the completion of present invention freezing, carry drilling through the heart, carry to earth's surface, disassembling section is simple, convenient for subsequent analysis test job.
Description
Technical field
It cores field the present invention relates to easy fragmentation Ground freezing, more particularly to a kind of mud shale chip resistant self set-up type freezing
Sampler and its sampling method.
Background technology
Rock core is the complete firsthand information obtained in oil-gas exploration, development process, by largely to the analysis of rock core
Foundation could be provided with research to formulate rational development plan, accurate calculating oil gas field reserves, formulating well stimulation.At one
Oil gas is found in sedimentary basin, boring sample assay items oil generation (gas) index from target zone is needed, according to assay office
Target zone and the Favorable Areass of oil-gas reservoir can be explored from oil generation (gas) angle Selection by obtaining result, by dividing removal of core
Analysis, further appreciate that in reservoir oil, gas and water distribution situation, the voidage of oil-gas Layer, permeability, hydrocarbon saturation with
And the effective thickness of oil-gas Layer, to determine that the commercial mining of oil-gas Layer is worth.Therefore, in exploration of oil and gas field, exploitation each stage, it is
Find out the property of reservoir formation or from the Strata Comparison in big region to inspection oil-gas field development effect, evaluation and improvement exploitation side
Case, any research step all be unable to do without observation and research to rock core.
Shale oil gas has typical self-generation, self-reservoir feature, is a kind of huge novel unconventionaloil pool money of resource potential
Source.At present, shale gas exploration and development achieves a series of important breakthroughs in China Sichuan Basin and its fringe area, has formed Fu
The shale gas producing region such as mound, Changning, Weiyuan is especially found that the large-scale shale gas of first nearly 400,000,000,000 side of China in the Sichuan southeast
Field, mud shale belong to the transition rock type between mud stone and shale, it is seen that develop incomplete laminated structure of shale, usually Vlei is to deeply
The product of lacustrine deposits, common mud shale type have shale mud shale, carbonaceous mud shale, siliceous mud shale, calcareous mud shale etc.,
When being mixed into a certain amount of chiltern ingredient in mud shale, chiltern mud shale can be formed, rich organic matter mud shale is to form mud shale
The main rock type of oil gas, mud shale oil gas is one kind in unconventionaloil pool, and shale oil deposit has become exploration
Break through target.
The micropore structure and distribution characteristics of oil and gas reservoir preserve it rules such as ability, seepage flow mechanism and play decision
Effect, shale, shale reservoir for DIFFERENT DEPOSITIONAL ENVIRONMENTS, reservoir property, micropore structure feature, the regularity of distribution one
As difference it is larger, and mud shale is easy to rupture, peel off and cave in and meet water sensitive, causes to be difficult to take during drive sampling
To the sample with complete reservoir property.
At present, the technology for the sampling of shale gas has conventional core to core with special, and special CORING TECHNOLOGY mainly has close
Close CORING TECHNOLOGY, pressure maintaining sealed coring technology and Horizontal Well Coring Technology；During sealing core drilling, sealing fluid is generally adopted by, into
This is relatively high, and rock core is easily corroded by the drilling fluid flowed, so as to pollute；Pressure maintaining sealed coring is then more
Be by ball valve complete sealing, reliability is promoted, but sleeve mechanism is complicated, has many places vulnerable part to be easy to cause sealing
Failure, success rate is not still high, and the low-temperature receiver Starting mode for freezing sampling is mostly external using earth's surface pitching and low-temperature receiver, human factor
It is more, it is difficult to control.Therefore, the novel corer and coring method for developing a kind of suitable mud shale property have practical application valency
Value.
Invention content
The invention aims to solve, above-mentioned existing sampler rock core is broken, easy to pollute, taking rate is low and low-temperature receiver opens
The problems such as dynamic poor controllability, and a kind of mud shale chip resistant self set-up type chilled sampling apparatus and its sampling method are provided.
A kind of mud shale chip resistant self set-up type chilled sampling apparatus of the present invention, is by reducing joint, shunt connector, adjusting
Single action mechanism, outer tube, rock core are breakage-proof and low-temperature receiver starts the mechanism that cores, reamer, rock core card breaking mechanism and drill bit composition, reducing and connects
Head, shunt connector, adjusting single action mechanism, rock core are breakage-proof and low-temperature receiver starts core mechanism, rock core card breaking mechanism and is threadedly coupled successively
Together, reducing joint, shunt connector, outer tube, reamer and drill bit are threaded togather successively；
Reducing joint top is connect with drill rod thread, and lower part is threadedly coupled with shunt connector；
Shunt connector top is threadedly coupled with reducing joint, and lower part is connect respectively with single action axis and external pipe thread；
It adjusts single action mechanism and includes adjusting nut, single action axis, O-ring seal, bearing top connection, bearing, bearing spider, pad
Circle, nut and bearing lower contact, adjusting nut are screwed in the screw thread of single action axis top, and single action axis top connects with shunt connector screw thread
It connects, O-ring seal is located among bearing top connection inboard wall groove, and bearing top connection, bearing, bearing spider and washer are from top to bottom
It is sequentially arranged on single action axis, and passes through nut by their screw-threaded couplings on single action axis, bearing top connection and bearing lower contact
It is threadedly coupled；
Outer tube top is connect with shunt connector lower thread, and lower part is threadedly coupled with reamer；
Rock core is breakage-proof and low-temperature receiver starts the mechanism that cores and includes low-temperature receiver injection valve, insulating layer, bearing lower contact, freezing chamber blocking
Head, freezing control valve road buffer air valve, pipe of coring, thermal insulating coating and sealing baffle, and freezing control valve road includes location nut, bullet
Spring, control block and trigger valve, low-temperature receiver injection valve are located at the hole of bearing lower contact top connection inner and outer pipes annular space and low-temperature receiver storeroom
Interior, insulating layer is covered on the outer wall of low-temperature receiver storeroom, and bearing lower contact lower part is threadedly coupled with pipe top of coring, and freezing chamber blocks up
Chock plug, which is located at, cores in pipe top, is threadedly coupled with bearing lower contact, and freezing control valve road is located at freezing chamber and blocks inside head, fixed
Position nut blocks head thread with freezing chamber and connect, and spring and control block are enclosed in freezing chamber blocks in head inner passage, starts
Valve is located at freezing chamber and blocks in head lower passage, and pipe top of coring is connect with bearing lower contact lower thread, lower part and clip spring seat
It is threadedly coupled, buffering air valve, which is located at, cores in the tube wall trepanning of pipe top, and sealing baffle, which is located at, cores inside pipe, inside the pipe that makes to core
Form sealing space；
Reamer top is connected with outer tube lower part by screw thread, and lower part is connect with drill bit thread；
Rock core Ka Qu mechanisms include clip spring seat, clamp spring baffle ring and clamp spring, and clamp spring baffle ring and clamp spring are sequentially located at from top to bottom
Inside clip spring seat, clip spring seat top is connect with pipe lower thread of coring；
Drill bit top is connect with reamer lower thread.
A kind of mud shale chip resistant self set-up type freezing sampling method of the present invention, specific sampling method are as follows：
First, start before coring, first drilling tool is assembled in earth's surface, adjust the position of adjusting nut can adjust clip spring seat with
Gap between drill bit, meanwhile, low-temperature receiver is injected into low-temperature receiver storeroom by low-temperature receiver injection valve, the refrigerating capacity of low-temperature receiver is according to being taken
Depending on rock core type, the size of inner tube and its distance apart from bottom drill bit, trigger valve is set according to coring type
Pressure is opened, inert gas (nitrogen, argon gas etc.) is injected into pipe of coring by buffering air valve, its air pressure is made to be equal to foot of hole
Head of liquid, the pressure difference value for opening pressure and head of liquid determines gas compression amount in pipe of coring, height of as coring
It spends, pressure acts in pipe of being cored, and sealing baffle, which is crushed on, cores on the preset step in pipe lower part；
2nd, drilling tool is in decentralization process, and the drilling fluid in hole is full of clip spring seat, contacts sealing baffle, lower part drilling fluid
Pressure is always less than the pressure that sealing baffle top is subject to, equal both when reaching bottom hole, therefore sealing baffle is constantly in original
Position after drilling tool reaches bottom hole, starts slush pump, drilling fluid is inside drilling rod, through reducing joint, split channel, into adjusting
In the annular space of single action mechanism and inner tube and outer tube, sprayed by the mouth of a river of drill bit；
3rd, in drilling process, adjusting nut, single action axis, O-ring seal, bearing top connection, bearing, bearing spider, pad
Circle, nut and bearing lower contact, which constitute, adjusts single action system, can not only adjust the gap between clip spring seat and drill bit, but also can be with
Make single action axis and more than turned round with drilling rod, bearing top connection and then remains stationary is motionless with lower part；
4th, simultaneously, during coring, as rock core constantly enters, original drilling fluid is from taking in clip spring seat and pipe of coring
It is extruded in the hole of heart pipe lower part, discharges original drilling fluid, later rock core uplink compression seal baffle, sealing baffle is being pressed
The air pressure of compression process middle and upper part constantly increases, so as to which rock core be made to be prevented the fragmentation of rock core by a continuous increased confining pressure, when up to
To it is certain core height when, the pressure value on sealing baffle top is more than the opening pressure of trigger valve, is on valve, and gas enters
Channel in control valve road pushes control block, compressed spring, and the trepanning in control block is connected with low-temperature receiver channel, low-temperature receiver downlink, into
The inner loop for entering pipe of coring is aerial, freezing core, and due to the effect of thermal insulating coating, the annular space of basket and outer tube will not be frozen in,
And the annular space of clip spring seat and outer tube, due to not having painting thermal insulating coating, drilling fluid can be frozen in, top drilling fluid can not downlink, pressure is not
Disconnected raising, earth's surface slush pump registration raising, prompts completion of coring, carries out proposing brill operation；
5th, sampler is carried to earth's surface, need to only melt the ice between clip spring seat and inner tube annular space, you can unload inner tube, obtain
Freezing core is obtained, is convenient for subsequent operation.
Beneficial effects of the present invention：
The configuration of the present invention is simple, reasonable, safe and reliable, installation, convenient disassembly, advantage of lower cost.With chip resistant work(
Can, the rock core for being particularly suitable for easy fragmentation stratum such as mud shale, oil shale, shale gas, gas hydrates and coal bed gas etc. takes
Sample has very good effect.When different rock-layers and different depth sample, different refrigerating capacity and valve only need to be arranged as required to
Pressure value, it is easy to operate, and it is suitable for a plurality of types of low-temperature receivers, it is applied widely.Using in hole (in well) from
Startup formula freezing method, is not required to human intervention, can reduce manual operation, improves efficiency, has warning function after the completion of freezing, carry
Show and carry out proposing brill operation, carry to earth's surface, disassembling section is simple, is convenient for follow-up work, increases practicability, improves work
Efficiency.
Description of the drawings
Fig. 1 is the structure sectional view of the present invention；
Fig. 2 is the partial enlarged view at B of the present invention；
Fig. 3 is the cross-sectional view at A-A ' places of the present invention；
Fig. 4 is the structure sectional view of first part of the present invention；
Fig. 5 is the structure sectional view of second part of the present invention；
Fig. 6 is the structure sectional view of Part III of the present invention.
Specific embodiment
It please refers to Fig.1 shown in -6, a kind of mud shale chip resistant self set-up type chilled sampling apparatus of the present invention, is connect by reducing
First 1, shunt connector 2, adjusting single action mechanism 3, outer tube 4, rock core are breakage-proof and low-temperature receiver starts core mechanism 5, reamer 6, rock core card
Breaking mechanism 7 and drill bit 8 form, and reducing joint 1, shunt connector 2, adjusting single action mechanism 3, rock core is breakage-proof and low-temperature receiver starts machine of coring
Structure 5, rock core card breaking mechanism 7 are threaded togather successively, reducing joint 1, shunt connector 2, outer tube 4, reamer 6 and drill bit 8
It is threaded togather successively；
1 top of reducing joint is connect with drill rod thread, and lower part is threadedly coupled with shunt connector 2；
2 top of shunt connector is threadedly coupled with reducing joint 1, and lower part is threadedly coupled respectively with single action axis 32 and outer tube 4；
Adjust single action mechanism 3 include adjusting nut 31, single action axis 32, O-ring seal 33, bearing top connection 34, bearing 35,
Bearing spider 36, washer 37, nut 38 and bearing lower contact 53, adjusting nut 31 are screwed in 32 top screw thread of single action axis, single action
32 top of axis is threadedly coupled with shunt connector 2, and O-ring seal 33 is located among 34 inboard wall groove of bearing top connection, is connect on bearing
First 34, bearing 35, bearing spider 36 and washer 37 are sequentially arranged at from top to bottom on single action axis 32, and pass through nut 38 by they
On single action axis 32, bearing top connection 34 is threadedly coupled screw-threaded coupling with bearing lower contact 53；
4 top of outer tube is connect with 2 lower thread of shunt connector, and lower part is threadedly coupled with reamer 6；
Mechanism 5 that rock core is breakage-proof and low-temperature receiver startup is cored includes low-temperature receiver injection valve 51, insulating layer 52, bearing lower contact 53, cold
Freeze chamber and block head 54, freezing control valve road 55, buffering air valve 56, pipe 57 of coring, thermal insulating coating 571 and sealing baffle 58, freezing control
Zhi Fa roads 55 include location nut 551, spring 552, control block 553 and trigger valve 554, and low-temperature receiver injection valve 51, which is located under bearing, to be connect
In the hole of first 53 top connection inner and outer pipes annular space and low-temperature receiver storeroom 531, insulating layer 52 is covered in the outer wall of low-temperature receiver storeroom 531
On, 53 lower part of bearing lower contact is threadedly coupled with 57 top of pipe of coring, and freezing chamber blocking head 54, which is located at, cores in 57 top of pipe, with
Bearing lower contact 53 is threadedly coupled, and freezing control valve road 55 is located at freezing chamber and blocks inside head 54, location nut 551 and freezing chamber
It blocks head 54 to be threadedly coupled, spring 552 and control block 553 are enclosed in freezing chamber blocks in 54 inner passage of head, trigger valve 554
It is blocked in 54 lower passage of head positioned at freezing chamber, 57 top of pipe of coring is connect with 53 lower thread of bearing lower contact, lower part and card
Spring abutment 71 is threadedly coupled, and buffering air valve 56, which is located at, cores in 57 top tube wall trepanning of pipe, and sealing baffle 58, which is located at, cores in pipe 57
Portion makes 57 inside formation sealing space of pipe of coring；
6 top of reamer is connect with 4 lower thread of outer tube, and lower part is threadedly coupled with drill bit 8；
Rock core Ka Qu mechanisms 7 include clip spring seat 71, clamp spring baffle ring 72 and clamp spring 73, clamp spring baffle ring 72 and clamp spring 73 on to
Under be sequentially located inside clip spring seat 71,71 top of clip spring seat is connect with 57 lower thread of pipe of coring；
8 top of drill bit is connect with 6 lower thread of reamer.
A kind of mud shale chip resistant self set-up type freezing sampling method of the present invention, specific sampling method are as follows：
It please refers to Fig.1 shown in -6, according to requirement of coring, selects a kind of chip resistant self set-up type freezing sampling for being suitble to size
Device, drilling tool dimensions overall diameter is respectively 89mm, 114mm, 131mm and 140mm；
First, a kind of chip resistant self set-up type chilled sampling apparatus before use, first assembles drilling tool in earth's surface, and adjustment is adjusted
The position of nut 31 can adjust the gap between clip spring seat 71 and drill bit 8, meanwhile, it is stored by low-temperature receiver injection valve 51 to low-temperature receiver
Inject low-temperature receiver in room 531, the refrigerating capacity of low-temperature receiver according to coring type, the size of inner tube and its apart from bottom drill bit away from
From depending on, the opening pressure P of trigger valve 554 is set according to coring type1, noted by buffering air valve 56 into pipe 57 of coring
Enter inert gas (nitrogen, argon gas etc.), make its air pressure P2Equal to the head of liquid of foot of hole, pressure P is opened1With head of liquid
P2Pressure difference value Δ p determine gas compression amount in pipe 57 of coring, height of as coring, pressure is made in pipe 57 of being cored
With sealing baffle 58, which is crushed on, cores on the preset step in 57 lower part of pipe；
2nd, for drilling tool in decentralization process, the drilling fluid in hole contacts sealing baffle 58, lower part drilling well full of clip spring seat 71
The pressure of liquid is always less than the pressure that 58 top of sealing baffle is subject to, equal both when reaching bottom hole, therefore sealing baffle 58 1
Directly in original position, after drilling tool reaches bottom hole, start slush pump, drilling fluid is inside drilling rod, through reducing joint 1, split channel
21, into the annular space for adjusting single action mechanism 3 and inner tube and outer tube 4, sprayed by the mouth of a river of drill bit 8；
3rd, in drilling process, adjusting nut 31, single action axis 32, O-ring seal 33, bearing top connection 34, bearing 35,
Bearing spider 36, washer 37, nut 38 and bearing lower contact 53 constitute adjust single action system, can both adjust clip spring seat 71 with
Gap between drill bit 8, and can make single action axis 32 and be turned round above with drilling rod, bearing top connection 34 and is then kept with lower part
It is stationary；
4th, simultaneously, during coring, as rock core constantly enters, original drilling fluid in clip spring seat 71 and pipe 57 of coring
It is extruded out of hole 572 that core 57 lower part of pipe, discharges original drilling fluid, rock core uplink compression seal baffle 58, close later
Block plate 58 constantly increases by the air pressure of compression process middle and upper part, so as to which rock core be made to be prevented by a continuous increased confining pressure
The fragmentation of rock core, when reach it is certain core height when, the pressure value P on 58 top of sealing baffle3More than the opening pressure of trigger valve 554
Power P1, valve 554 is on, gas enters the channel in control valve road 55, pushes control block 553, compressed spring 552, control
Trepanning 555 on block 553 is connected with low-temperature receiver channel 59, and low-temperature receiver downlink, the inner loop into pipe 57 of coring is aerial, freezing core,
Due to the effect of thermal insulating coating 571, basket 57 and the annular space of outer tube 4 will not be frozen in, and the annular space of clip spring seat 71 and outer tube 4 by
In no painting thermal insulating coating 571, drilling fluid can be frozen in, top drilling fluid can not downlink, pressure constantly increases, and earth's surface slush pump shows
It is several litres high, completion of coring is prompted, carries out proposing brill operation；
5th, sampler is carried to earth's surface, need to only melt the ice between 4 annular space of clip spring seat 71 and outer tube, you can inner tube is unloaded,
Freezing core is obtained, is convenient for subsequent operation.
Claims (2)
1. a kind of mud shale chip resistant self set-up type chilled sampling apparatus, it is characterised in that：It is by reducing joint (1), shunt connector
(2), adjusting single action mechanism (3), outer tube (4), rock core are breakage-proof and low-temperature receiver starts core mechanism (5), reamer (6), rock core card and breaks
Mechanism (7) and drill bit (8) composition, reducing joint (1), shunt connector (2), adjusting single action mechanism (3), rock core is breakage-proof and low-temperature receiver opens
Dynamic core mechanism (5), rock core card breaking mechanism (7) are threaded togather successively, reducing joint (1), shunt connector (2), outer tube
(4), reamer (6) and drill bit (8) are threaded togather successively；
Reducing joint (1) top is connect with drill rod thread, and lower part is threadedly coupled with shunt connector (2)；
Shunt connector (2) top is threadedly coupled reducing joint (1), and lower part is threadedly coupled respectively with single action axis (32) and outer tube (4)；
Adjust single action mechanism (3) including adjusting nut (31), single action axis (32), O-ring seal (33), bearing top connection (34),
Bearing (35), bearing spider (36), washer (37), nut (38) and bearing lower contact (53), adjusting nut (31) screw in single action
In the screw thread of axis (32) top, single action axis (32) top is threadedly coupled with shunt connector (2), and O-ring seal (33) is on bearing
Among connector (34) inboard wall groove, bearing top connection (34), bearing (35), bearing spider (36) and washer (37) from top to bottom according to
It is secondary to be mounted on single action axis (32), and pass through nut (38) by their screw-threaded couplings on single action axis (32), bearing top connection
(34) it is threadedly coupled with bearing lower contact (53)；
Outer tube (4) top is connect with shunt connector (2) lower thread, and lower part is threadedly coupled with reamer (6)；
Rock core is breakage-proof and low-temperature receiver starts the mechanism (5) that cores and includes low-temperature receiver injection valve (51), insulating layer (52), bearing lower contact
(53), freezing chamber block head (54), freezing control valve road (55), buffering air valve (56), pipe of coring (57), thermal insulating coating (571) and
Sealing baffle (58), freezing control valve road (55) include location nut (551), spring (552), control block (553) and trigger valve
(554), low-temperature receiver injection valve (51) connects the hole of inner and outer pipes annular space and low-temperature receiver storeroom (531) positioned at bearing lower contact (53) top
Interior, insulating layer (52) is covered on the outer wall of low-temperature receiver storeroom (531), bearing lower contact (53) lower part and pipe (57) top of coring
It is threadedly coupled, freezing chamber blocks head (54) in pipe of coring (57) top, is threadedly coupled with bearing lower contact (53), freezing control
Zhi Fa roads (55) block head (54) inside positioned at freezing chamber, and location nut (551) blocks head (54) with freezing chamber and is threadedly coupled, will
Spring (552) and control block (553) are enclosed in freezing chamber and block in head (54) inner passage, and trigger valve (554) is positioned at freezing chamber
It blocks in head (54) lower passage, pipe of coring (57) top is connect with bearing lower contact (53) lower thread, lower part and clip spring seat
(71) it is threadedly coupled, buffering air valve (56) is in pipe of coring (57) top tube wall trepanning, and sealing baffle (58) is positioned at pipe of coring
(57) it is internal, make the internal formation sealing space of pipe (57) of coring；
Reamer (6) top is connect with outer tube (4) lower thread, and lower part is threadedly coupled with drill bit (8)；
Rock core Ka Qu mechanisms (7) include clip spring seat (71), clamp spring baffle ring (72) and clamp spring (73), clamp spring baffle ring (72) and clamp spring
(73) it is internal that it is sequentially located at clip spring seat (71) from top to bottom, clip spring seat (71) top is connect with pipe of coring (57) lower thread；
Drill bit (8) top is connect with reamer (6) lower thread.
2. a kind of mud shale chip resistant self set-up type freezes sampling method, specific sampling method is as follows：
First, a kind of chip resistant self set-up type chilled sampling apparatus before use, according to requirement of coring, selects that one kind of size is suitble to prevent
Fragmentation self set-up type chilled sampling apparatus first assembles drilling tool in earth's surface, and the position of adjustment adjusting nut (31) can adjust card
Gap between spring abutment (71) and drill bit (8), meanwhile, by low-temperature receiver injection valve (51), into low-temperature receiver storeroom (531), injection is cold
Source, the refrigerating capacity of low-temperature receiver is depending on coring type, the size of inner tube and its distance apart from bottom drill bit, according to institute
The opening pressure P of coring type setting trigger valve (554)1, by buffering air valve (56) injection inertia into pipe of coring (57)
Gas makes its air pressure P2Equal to the head of liquid of foot of hole, pressure P is opened1With head of liquid P2Pressure difference value Δ p determine
Gas compression amount in pipe of coring (57), height of as coring, (pressure acts on pipe of being cored in 57, sealing baffle (58) quilt
It is pressed on the preset step in pipe of coring (57) lower part；
2nd, drilling tool is in decentralization process, and the drilling fluid in hole is full of clip spring seat (71), contact sealing baffle (58), lower part drilling well
The pressure of liquid is always less than the pressure that sealing baffle (58) top is subject to, equal both when reaching bottom hole, therefore sealing baffle
(58) be constantly in original position, after drilling tool reaches bottom hole, start slush pump, drilling fluid inside drilling rod, through reducing joint (1),
Split channel (21) into the annular space for adjusting single action mechanism (3) and inner tube and outer tube (4), is sprayed by the mouth of a river of drill bit (8)
Go out；
3rd, in drilling process, adjusting nut (31), single action axis (32), O-ring seal (33), bearing top connection (34), bearing
(35), bearing spider (36), washer (37), nut (38) and bearing lower contact (53), which constitute, adjusts single action system, both can be with
The gap between clip spring seat (71) and drill bit (8) is adjusted, and single action axis (32) can be made and turned round above with drilling rod, is connect on bearing
Head (34) and then remains stationary is motionless with lower part；
4th, simultaneously, during coring, as rock core constantly enters, original drilling fluid in clip spring seat (71) and pipe of coring (57)
It is extruded in from the hole (572) of pipe of coring (57) lower part, discharges original drilling fluid, later rock core uplink compression seal baffle
(58), sealing baffle (58) constantly increases by the air pressure of compression process middle and upper part, so as to make rock core constantly increased by one
Confining pressure prevents the fragmentation of rock core, when reach it is certain core height when, the pressure value P on sealing baffle (58) top3More than trigger valve
(554) opening pressure P1, valve (554) is on, gas enters the channel in control valve road (55), pushes control block
(553), compressed spring (552), the trepanning (555) in control block (553) are connected with low-temperature receiver channel (59), and low-temperature receiver downlink enters
Core pipe (57) inner loop it is aerial, freezing core, due to the effect of thermal insulating coating (571), the ring of basket (57) and outer tube (4)
Sky will not be frozen in, and the annular space of clip spring seat (71) and outer tube (4) is not due to having painting thermal insulating coating (571), and drilling fluid can be frozen in,
Top drilling fluid can not downlink, pressure constantly increases, and the raising of earth's surface slush pump registration prompts completion of coring, carries out proposing brill operation；
5th, sampler is carried to earth's surface, need to only melt the ice between clip spring seat (71) and outer tube (4) annular space, you can inner tube is unloaded,
Freezing core is obtained, is convenient for subsequent operation.
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| CN201810171877.5A CN108150122A (en) | 2018-03-01 | 2018-03-01 | A kind of mud shale chip resistant self set-up type chilled sampling apparatus and its sampling method |
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| WO2020034360A1 (en) * | 2018-08-13 | 2020-02-20 | 四川大学 | Constant-temperature and constant-pressure core preservation chamber |
| WO2020093410A1 (en) * | 2018-11-08 | 2020-05-14 | 深圳大学 | Drilling mechanism of coring drilling rig |
| CN112324374A (en) * | 2021-01-04 | 2021-02-05 | 成都理工大学 | Stress-preserving coring device and method |
| CN113738298A (en) * | 2021-09-10 | 2021-12-03 | 中国地质大学（北京） | Pressure-maintaining coring device |
| CN115217428A (en) * | 2021-04-20 | 2022-10-21 | 中国石油天然气股份有限公司 | Shale gas and rock core pressure maintaining sealing sampling device and method |
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| CN115217428A (en) * | 2021-04-20 | 2022-10-21 | 中国石油天然气股份有限公司 | Shale gas and rock core pressure maintaining sealing sampling device and method |
| CN115217428B (en) * | 2021-04-20 | 2024-03-26 | 中国石油天然气股份有限公司 | Shale gas and rock core pressure maintaining sealing sampling device and method |
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