CN108360994A - Impact rotating formula gas hydrate hole-bottom frozen cord coring drill and method - Google Patents
Impact rotating formula gas hydrate hole-bottom frozen cord coring drill and method Download PDFInfo
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- CN108360994A CN108360994A CN201810191870.XA CN201810191870A CN108360994A CN 108360994 A CN108360994 A CN 108360994A CN 201810191870 A CN201810191870 A CN 201810191870A CN 108360994 A CN108360994 A CN 108360994A
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- cavity pipe
- connecting rod
- pipe
- power supply
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- 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
Abstract
Impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention and method, belong to geological core drilling technical field, core drill is made of inner tube assembly and outer pipe assembly, inner tube assembly includes salvaging mechanism, bullet card detent mechanism, suspension mechanism, single action mechanism, buffer gear, beater mechanism and hole-bottom frozen mechanism, coring method freezes gas hydrates rock core using refrigeration unit circularly cooling refrigerant, it can be achieved to be rapidly frozen, freezing is imitated, since traditional refrigeration mechanism is compared in the recycling of refrigerant, not only refrigeration is uniform, cost and subsidiary operation time caused by due to supplementing refrigerant can be also effectively reduced；Inner tube assembly does not turn round in drilling process, destruction so as to avoid the mechanical force generated by drilling tool revolution to gas hydrates rock core, and because of the advanced drilling of inner tube, flushing liquor erosion gas hydrates rock core is effectively prevented, gas hydrates core recovery percentage, integrity degree and representativeness are more effectively improved.
Description
Technical field
The invention belongs to geological core drilling technical fields, are related to impact rotating formula gas hydrate hole-bottom frozen rope
Core drill and method, especially suitable Yu Haiyang and the probing freezing sampling of land gas hydrate in permafrost.
Background technology
With rapid development of economy, the consumption of the energy is also growing, and the conventional energy resources such as oil, coal and natural gas are a large amount of
Consumption, from the point of view of its remaining reserves, conventional energy resource can not continue long term support modern industry.Whole world sea-bottom natural gas at present
The carbon total amount of methane is equivalent to twice of the fossil fuels total resources such as currently known coal, oil and natural gas in hydrate.Cause
And gas hydrates become the important standby energy that countries in the world must take in energy strategy balanced growth.
The alternative energy source that future becomes the conventional energy resources such as coal, oil, natural gas is also known together by the mankind.China's marine site gas water for the first time
It closes object pilot production and obtains success in South Sea Shenhu sea area, realize the historical breakthrough of China's natural gas hydrate research and development,
However, the pilot production of Gas Hydrate In Sea Areas is successfully the first step of a long march of ten thousand li, in order to realize that the year two thousand thirty natural gas is hydrated
Object industrialization development, also many problem needs overcome, and also many key technologies need to be grasped.
Natural gas hydrate exploration and one of the key of developmental research are drill sampling technologies, because drill sampling is to understand
One of most direct means of gas hydrates storage condition, the gas hydrates sample for only obtaining high-fidelity just can confirm that
The correctness of exploration, while being also the important evidence of calculated reserves and formulation development plan.
The formation of gas hydrates and occurrence condition are harsher, therefore obtain the gas hydrates sample of high-fidelity
Difficulty is larger.The fidelity sampling device for obtaining gas hydrates at present mainly has bottom hole heat-insulation pressure keeping sampler and hole-bottom frozen to take
Two kinds of sample device.And requirement of the bottom hole heat-insulation pressure keeping sampler to the intensity and leakproofness of ball valve is very high, once its leakproofness is
Decline, the rock core of high-fidelity cannot be obtained, and there are problems that rock core is rinsed liquid pollution and erosion in drilling process.Bottom hole
Chilled sampling apparatus then needs to consume a large amount of refrigerant, and refrigerant also can be with a large amount of gasification, freezing chamber during injecting
Also easily there is temperature unevenness in upper and lower ends, lead to that refrigerating effect is poor, freezing efficiency is low；Injection refrigerant is all time-consuming and laborious every time,
Cost of labor, which can not only be increased, can also influence project progress.Therefore, there is an urgent need for a kind of new technical solutions to solve in the prior art
State problem.
Invention content
In view of the deficiencies of the prior art, it is an object of the present invention to provide it is a kind of it is stable and reliable in work, action is easy to implement, cold
Freeze effect is good, coring rate is high, coring fidelity is high impact rotating formula gas hydrate hole-bottom frozen cord coring drill and
Method.
In order to achieve the above object, the present invention adopts the following technical scheme that：Impact rotating formula gas hydrates bottom hole
Freezing cord coring drill, it is characterised in that：The core drill is made of inner tube assembly and outer pipe assembly two parts, inner tube assembly
Including salvaging mechanism, bullet card detent mechanism, suspension mechanism, single action mechanism, buffer gear, beater mechanism and hole-bottom frozen mechanism,
The salvaging mechanism includes fishing spearhead, the first resilient key and bullet card recovery tube, fishing spearhead by the first resilient key with
Bullet card recovery tube is hinged；It is connect with fishing spearhead after in fisher tripping in hole；Bullet card recovery tube is in its own gravity and fisher pulling force
Downward vertical direction is acted on to be promoted and transferred；
The bullet card detent mechanism includes the second resilient key, adapter coupling, torsional spring, bullet card, third resilient key and plays card holder,
Card holder and bullet card recovery tube is played to be hinged by the second resilient key, the second resilient key is movably to connect with the connection for playing card holder, second
To be fixedly connected between resilient key and bullet card recovery tube, bullet card quantity is two panels, and two panels bullet card is stuck in adapter coupling, and two
It is formed and is rotatablely connected by third resilient key between piece bullet card, played cacaine torsional spring and keep opening in bullet card holder, third resilient key
It is to be fixedly connected with card holder is played；
The suspension mechanism includes playing card holder, interior catcher, the first hanging ring and the first seat ring, and interior catcher passes through with card holder is played
It is threadedly coupled, while interior catcher is connect by screw thread with the first hanging ring, is provided with equally distributed eight inclined holes on catcher inside,
Wherein four inclined holes are located above the first hanging ring, and four additional inclined hole is located at the first hanging ring lower section, the first hanging ring and the
After one seat ring contact, the circulation passage between inner tube and outer tube is blocked, and mud is entered by the inclined hole positioned at inscribed portion on hand,
Mud cycle is completed from the inclined hole outflow positioned at inscribed portion of subordinate；First hanging ring is that contact is connect with the first seat ring, this
Contact connection makes inner tube assembly be suspended in outer pipe assembly；
The single action mechanism includes top chock, step, first bearing, second bearing and oil nozzle, top chock with
Interior catcher is connected through a screw thread；First bearing top is contacted with top chock, and is rotated with top chock, first bearing lower part with
Step contact remains stationary as；Second bearing top is contacted with step；Oil nozzle passes through thread contact, profit with step
Lubricating oil is injected between first bearing and top chock by oil nozzle in the gap between second bearing and step；
The buffer gear includes spring, baffle ring, gasket and round nut, and round nut is connected through a screw thread with top chock,
And baffle ring is fixed at the lower step of top chock by gasket, spring lower part is contacted with baffle ring, spring top and second
Bearing touch；
The beater mechanism includes power-driven impactor, power supply, connecting rod, electrode, conducting wire, inner nut catch, catch sealing
Circle, the first cavity pipe, the second cavity pipe and the second drill bit, electrode are located in the interior bone of power supply, and anode is located above cathode,
And respectively with two conductive contacts in connecting rod；Connecting rod is placed through the through-hole of power source internal and power supply cavity pipe screw thread connects
It connects, power supply forms movable connection with refrigeration unit, power-driven impactor successively by the conducting wire being arranged inside connecting rod, and power supply is solid
It is scheduled in power supply cavity pipe；Inner nut catch is connect with power supply cavity pipe screw thread, and catch sealing is provided in the middle part of inner nut catch
Circle；It is threadedly coupled between second cavity pipe and the first cavity pipe；Second drill bit is connected through a screw thread with the second cavity pipe；Electronic punching
Device is hit to be fixed in the first cavity pipe；When the first cavity pipe in inner tube assembly moves upward to and power supply cavity pipe along connecting rod
Reach the stroke upper limit of the first cavity pipe when contact, wire connected power and power-driven impactor, power-driven impactor start at this time
Work, the impact force of power-driven impactor are transmitted to the second drill bit by the second cavity pipe and carry out percussion drilling；
The hole-bottom frozen mechanism includes that refrigeration unit, power supply, connecting rod, conducting wire, freezing chamber, vacuum chamber, refrigerant are defeated
Enter pipe, refrigerant efferent duct, basket, clamp spring, clip spring seat, non-return valve ball and non-return valve seat, connecting rod lower part sequentially passes through
One cavity pipe, refrigeration unit, cushioning piece, power-driven impactor and the second cavity pipe, and formed with them and movably connect, connecting rod
It is provided with sealing ring between the first cavity pipe；The located bolt of refrigeration unit forms a fixed connection with the first cavity pipe, connection
Bar lower end reaches the lower travel limit of the first cavity pipe, the second hanging ring and second when being contacted with the second cavity tube cavity top surface
Be reserved between seat ring for flushing liquor by gap, at this time conducting wire connect refrigeration unit and power supply, freezing chamber and vacuum chamber position
Inside the second cavity pipe, freezing chamber and vacuum chamber are coaxially arranged, and vacuum chamber is located at outside freezing chamber, and freezing chamber passes through respectively
Refrigerant input pipe, refrigerant efferent duct are connected to form refrigerant-cycle systems with refrigeration unit；Pull off gas hydrates rock
When the heart, connecting rod lower end reaches the first cavity pipe lower travel limit, the second suspension when being contacted with the second cavity tube cavity top surface
Ring and the second seat ring contact；Second cavity pipe is connected through a screw thread with the second hanging ring, and basket is connected with clip spring seat by screw thread
It connects；Non-return valve ball is mounted on connecting rod lower part by non-return valve seat；Clip spring seat is in the bellmouth of clip spring seat；
Outer pipe assembly includes adapter coupling, the first outer tube, the first reamer, the second reamer, the second outer tube, the second suspension
Ring and the first drill bit, adapter coupling are connected through a screw thread with the first outer tube, and the first outer tube is connect by screw thread with the first reamer,
Second reamer is connected through a screw thread with the second outer tube, and the second outer tube is connect by screw thread with the second hanging ring, the second reamer
It is connected through a screw thread with the first drill bit.
The connecting rod moves in a straight line in the hole of the second cavity pipe；Freezing chamber is the cavity for storing refrigerant.
Impact rotating formula gas hydrate hole-bottom frozen wire line coring method, which is characterized in that this method is using above-mentioned
Core drill, specifically include following steps：
A, connecting rod and inner nut catch are unloaded first on raised platform around a well from power supply cavity pipe, the power supply substituted the bad for the good is packed into electricity
In source chamber body pipe, and examine whether the sealing performance of catch sealing ring reaches seal request；
B, by lubricating oil be injected between first bearing and top chock by oil nozzle and second bearing and step it
Between gap in；
C, inner tube assembly is transferred in hole and is crept into；
D, connecting rod lower end keeps contacting with the second cavity tube cavity top surface, until the first cavity pipe connects with power supply cavity pipe
It touches, the conducting wire in connecting rod is connected to power-driven impactor at this time, and power-driven impactor is started to work, and power-driven impactor impacts a depthkeeping
Conducting wire can not be connected to power-driven impactor after degree, and power-driven impactor is stopped, until the drilling depth of outer tube and the brill of inner tube
After reaching certain distance into depth, power-driven impactor is started to work；
E, fisher is put into after drilling, the recovery hook on fisher will drag for spearhead and lock, and it is total that inner tube is above put forward after latching
Drilling tool at, the first cavity pipe and below is since the opposite fishing spearhead of self gravitation effect moves down, the length of inner tube assembly movement
Equal to the first cavity pipe stroke when, continue above to carry inner tube assembly until the second hanging ring and the second seat ring contact, connect at this time
Power suffered by bar reaches maximum value, and the power for pulling off gas hydrates rock core is transmitted to outer tube, at the same time, in connecting rod
Conducting wire is connected to power supply and refrigeration unit, and refrigeration unit starts the cycle over refrigeration gas hydrates rock core；
F, after pulling off gas hydrates rock core, connecting rod lower face keeps contacting with the second cavity tube cavity top surface, this
When refrigeration unit continue cycling through refrigeration gas hydrates rock core；
G, inner tube assembly reaches the connection of deenergization and refrigeration unit and power-driven impactor behind ground, and unloading clip spring seat will
The gas hydrates rock core of freezing is put into liquid nitrogen Cans after taking out and preserves.
When salvaging rock core, the first cavity pipe comes downwards to the lower travel limit of the first cavity pipe, and conducting wire is by refrigeration unit and electricity
Source is connected, refrigeration unit circularly cooling agent, and refrigerant realizes the freezing to gas hydrates rock core by heat exchange.
By above-mentioned design scheme, the present invention can bring following advantageous effect：The present invention is using refrigeration unit cycle system
Cold refrigerant freezes gas hydrates rock core, it can be achieved that being rapidly frozen, and freezing is imitated, since the cycle of refrigerant makes
With compared to traditional refrigeration mechanism, not only refrigeration is uniform, can also be effectively reduced cost and caused by due to supplementing refrigerant it is auxiliary
Help the activity duration；Inner tube assembly does not turn round in drilling process, so as to avoid the mechanical force generated by drilling tool revolution to natural gas
The destruction of hydrate rock core, and because of the advanced drilling of inner tube, flushing liquor erosion gas hydrates rock core is effectively prevented, more
It is effectively improved gas hydrates core recovery percentage, integrity degree and representativeness.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description explanation does not constitute the improper restriction of the present invention, in the accompanying drawings for understanding the present invention：
Fig. 1 is the overall structure signal of impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention
Figure.
Fig. 2 is the upper portion signal of impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention
Figure.
Fig. 3 is the stage casing part signal of impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention
Figure.
Fig. 4 is the lower section signal of impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention
Figure.
It is respectively marked in figure as follows：1- drags for spearhead, the first resilient keys of 2-, 3- bullet cards recovery tube, 4. second resilient keys, 5- bullet cards
Stopper, 6- torsional springs, 7- bullets card, 8- thirds resilient key, 9- bullets card holder, the first outer tubes of 10-, catcher in 11-, the first hanging rings of 12-,
The first seat rings of 13-, 14- first bearings, 15- top chocks, 16- oil nozzles, 17- second bearings, 18- steps, 19- springs,
20- baffle rings, 21- gaskets, 22- round nuts, 23- power supply cavitys pipe, 24- power supplys, 25- connecting rods, 26- electrodes, 27- inner nuts gear
Piece, 28- catch sealing ring, the second outer tubes of 29-, 30- conducting wires, the first cavitys of 31- pipe, 32- refrigeration units, 33- positioning bolts,
34- refrigerants input pipe, 35- cushioning pieces, 36- power-driven impactors, the second cavitys of 37- pipe, the non-return valve balls of 38-, 39- check (non-return) valves
Seat, 40- freezing chambers, 41- vacuum chambers, the second reamers of 42-, the second hanging rings of 43-, the second seat rings of 44-, 45- baskets, 46-
First drill bit, 47- clamp springs, 48- clip spring seats, the second drill bits of 49-, the first reamers of 50-, 51- refrigerant efferent ducts.
Specific implementation mode
It please refers to Fig.1, shown in Fig. 2, Fig. 3 and Fig. 4, impact rotating formula gas hydrate hole-bottom frozen proposed by the present invention
Cord coring drill, the core drill are made of inner tube assembly and outer pipe assembly two parts, and inner tube assembly includes salvaging mechanism, bullet
Card detent mechanism, suspension mechanism, single action mechanism, buffer gear, beater mechanism and hole-bottom frozen mechanism,
Salvaging mechanism includes fishing spearhead 1, the first resilient key 2 and bullet card recovery tube 3, fishing spearhead 1 by the first resilient key 2 with
Bullet card recovery tube 3 is hinged；It is connect with fishing spearhead 1 after in fisher tripping in hole；Bullet card recovery tube 3 is drawn in its own gravity and fisher
The downward vertical direction of force effect is promoted and decentralization；Salvaging mechanism is realized by the connection of fisher and salvaging mechanism by drilling tool inner tube
Assembly is put into hole and the process of recycling；It drives connecting rod 25 to move up when lifting salvaging mechanism by fisher simultaneously, makes
Refrigeration unit 32 powers on 24, and then circularly cooling agent freezes to gas hydrates rock core, to realize freezing rope
Ask for the process of core.
Bullet card detent mechanism includes the second resilient key 4, adapter coupling 5, torsional spring 6, bullet card 7, third resilient key 8 and plays card holder
9, it plays card holder 9 and is hinged by the second resilient key 4 with bullet card recovery tube 3, the second resilient key 4 and the connection for playing card holder 9 are movably to connect
It connects, to be fixedly connected between the second resilient key 4 and bullet card recovery tube 3,7 quantity of bullet card is two panels, and two panels bullet card 7 is stuck in bullet card
It in stopper 5, and is formed and is rotatablely connected by third resilient key 8 between two panels bullet card 7, bullet card 7 is protected because of torsional spring 6 in bullet card holder 9
Opening is held, third resilient key 8 is to be fixedly connected with card holder 9 is played；Since two panels bullet card 7 is stuck in adapter coupling 5, into without because
Gas Hydrates On Drilling Procedure rock core generates upward power and inner tube assembly is caused to move up when entering basket 45.
Suspension mechanism includes playing card holder 9, the 11, first hanging ring 12 of interior catcher and the first seat ring 13, interior catcher 11 and bullet card
Frame 9 is connected through a screw thread, while interior catcher 11 is connect by screw thread with the first hanging ring 12, is taken over to be provided on 11 inside and uniformly be divided
Eight inclined holes of cloth, wherein four inclined holes are located at 12 top of the first hanging ring, four additional inclined hole is located under the first hanging ring 12
Side, after the first hanging ring 12 is contacted with the first seat ring 13, causes the circulation passage between inner tube and outer tube to be blocked, mud passes through
Inclined hole positioned at 11 tops of interior catcher enters, and mud cycle is completed from the inclined hole outflow positioned at 11 lower parts of interior catcher；First suspension
Ring 12 is that contact is connect with the first seat ring 13, and this contact connection makes inner tube assembly be suspended in outer pipe assembly；
Single action mechanism includes top chock 15, step 18, first bearing 14, second bearing 17 and oil nozzle 16, upper axis
Bearing 15 is connected through a screw thread with interior catcher 11；14 top of first bearing is contacted with top chock 15, and with 15 turns of top chock
Dynamic, 14 lower part of first bearing is contacted with step 18 to be remained stationary as；When gas hydrates rock core blocks in basket 45
When, first bearing 14 bears top power, which is then transmitted to outer tube, 17 top of second bearing and step 18 by bullet card 7
Contact；Second bearing 17, which provides top power, makes step 18 not move down, and oil nozzle 16 is connect with step 18 by screw thread
Touch, lubricating oil be injected between first bearing 14 and top chock 15 by oil nozzle 16 and second bearing 17 and step 18 it
Between gap in；Since the presence of first bearing 14 and second bearing 17 enables 45 single action of basket, gas water is avoided
Close the disturbance of object；
Buffer gear includes spring 19, baffle ring 20, gasket 21 and round nut 22, and round nut 22 passes through spiral shell with top chock 15
Line connects, and baffle ring 20 is fixed at the lower step of top chock 15 by gasket 21, and 19 lower part of spring connects with baffle ring 20
It touches, 19 top of spring is contacted with second bearing 17；19 lower part of spring is because contacting and can not move down with baffle ring 20, and top is because with
The flexible of spring 19 is restricted the contact of two bearings 17 in turn, and when inner tube assembly is transferred in hole, the first hanging ring 12 is located
On the first seat ring 13, because dead weight moves down, spring 19 can play slow for the mechanism of inner tube assembly lower part, that is, 27 lower part of inner nut catch
Punching acts on, and there are the channels that certain gap is flowed as mud for the second hanging ring 43 and the second seat ring 44；It is disconnected natural in card
When gas hydrate rock core, clamp spring 47 drives clip spring seat 48 to move down compressed spring 19, and the second hanging ring 43 is contacted with the second seat ring 44,
And then the power for pulling off gas hydrates rock core is transmitted on outer tube.
Beater mechanism include power-driven impactor 36, power supply 24, connecting rod 25, electrode 26, conducting wire 30, inner nut catch 27,
Catch sealing ring 28, the first cavity pipe 31, the second cavity pipe 37 and the second drill bit 49, electrode 26 are located at the interior bone of power supply 24
In, anode is located above cathode, and is contacted respectively with two conducting wires 30 in connecting rod 25；Connecting rod 25 is placed through power supply 24
Internal through-hole is threadedly coupled with power supply cavity pipe 23, power supply 24 by the conducting wire 30 that is arranged inside connecting rod 25 successively with system
Cold group 32, power-driven impactor 36 form movable connection, and power supply 24 is fixed in power supply cavity pipe 23；Inner nut catch 27 and electricity
Source chamber body pipe 23 is threadedly coupled, and 27 middle part of inner nut catch is provided with catch sealing ring 28；Second cavity pipe 37 and the first cavity
It is threadedly coupled between pipe 31；Second drill bit 49 is connected through a screw thread with the second cavity pipe 37；Power-driven impactor 36 is fixed on first
In cavity pipe 31；When the first cavity pipe 31 in inner tube assembly is moved upward to along connecting rod 25 to be contacted with power supply cavity pipe 23
Reach the stroke upper limit of the first cavity pipe 31, conducting wire 30 powers on 24 and power-driven impactor 36, power-driven impactor 36 at this time
It starts to work, the impact force of power-driven impactor 36 is transmitted to the second drill bit 49 by the second cavity pipe 37 and carries out percussion drilling；
Hole-bottom frozen mechanism include refrigeration unit 32, power supply 24, connecting rod 25, conducting wire 30, freezing chamber 40, vacuum chamber 41,
Refrigerant input pipe 34, refrigerant efferent duct 51, basket 45, clamp spring 47, clip spring seat 48, non-return valve ball 38 and non-return valve seat
39,25 lower part of connecting rod sequentially passes through the first cavity pipe 31, refrigeration unit 32, cushioning piece 35, power-driven impactor 36 and second
Cavity pipe 37, and formed with them and movably connect, sealing ring, connecting rod 25 are provided between connecting rod 25 and the first cavity pipe 31
The presence of sealing ring can avoid liquid into the first cavity pipe 31 between the first cavity pipe 31；32 located bolt of refrigeration unit
33 form a fixed connection with the first cavity pipe 31, and 25 lower end of connecting rod reaches when being contacted with 37 inner cavity top surface of the second cavity pipe
The lower travel limit of first cavity pipe 31, when the first cavity pipe 31 reaches lower travel limit, the second hanging ring 43 and the second seat ring 44
Between have certain gap, pass through for flushing liquor, conducting wire 30 connects refrigeration unit 32 and power supply 24 at this time, and refrigeration unit 32 starts
Work, refrigerant enters freezing chamber by refrigerant efferent duct 51, then is completed into refrigeration unit 32 by refrigerant input pipe 34
Refrigeration cycle, freezing chamber 40 and vacuum chamber 41 are located inside the second cavity pipe 37, and freezing chamber 40 and vacuum chamber 41 are coaxially arranged, and
Vacuum chamber 41 is located at outside freezing chamber 40, and freezing chamber 40 passes through refrigerant input pipe 34, refrigerant efferent duct 51 and refrigeration respectively
The connection of unit 32 forms refrigerant-cycle systems, is freezed by heat exchange between refrigerant and gas hydrates rock core natural
Gas hydrate rock core avoids scattering and disappearing for most of cold due to the presence of outer layer vacuum chamber 41；Pull off gas hydrates rock
When the heart, 25 lower end of connecting rod reaches 31 lower travel limit of the first cavity pipe when being contacted with 37 inner cavity top surface of the second cavity pipe, the
Two hanging rings 43 are contacted with the second seat ring 44；Second cavity pipe 37 is connected through a screw thread with the second hanging ring 43, basket 45 with
Clip spring seat 48 is connected through a screw thread；Non-return valve ball 38 is mounted on 25 lower part of connecting rod by non-return valve seat 39；Clamp spring 47 is in card
In the bellmouth of spring abutment 48；When pulling off gas hydrates rock core, intracavitary in 25 end portion of connecting rod and the second cavity pipe 37
Top surface contact when the first cavity pipe 31 reach lower travel limit, the second hanging ring 43 is contacted with the second seat ring 44, is rinsed at this time
Liquid stream is logical to be obstructed, and pump pressure increases；After pulling off gas hydrates rock core, due to the restoring force of spring 19, the second hanging ring 43 with
Second seat ring 44 separates, and passage of irrigation fluid is opened, and pump pressure restores normal.First cavity pipe 31 and the second cavity pipe 37 pass through screw thread
Connection, the second cavity pipe 37 are connected through a screw thread with the second hanging ring 43, and the second drill bit 49 and the second cavity pipe 37 pass through screw thread
Connection, basket 45 are connected through a screw thread with clip spring seat 48.Due to the presence of 25 lower part check (non-return) valve of connecting rod, in drilling process
In, thus the liquids and gases in basket 45 can be discharged.Clamp spring 47 is in the bellmouth of clip spring seat 48, after drilling
47 locking core column of clamp spring, power are transmitted to the second drill bit 49 by clamp spring 47 through clip spring seat 48, then through the second hanging ring 43, second
The power for pulling off gas hydrates rock core is transmitted on outer tube by ring 44 ensures that inner tube assembly does not stress.
Outer pipe assembly includes adapter coupling 5, the first outer tube 10, the first reamer 50, the second reamer 42, the second outer tube
29, the second hanging ring 43 and the first drill bit 46, adapter coupling 5 are connected through a screw thread with the first outer tube 10, and the first outer tube 10 passes through
Screw thread is connect with the first reamer 50, and the second reamer 42 is connected through a screw thread with the second outer tube 29, and the second outer tube 29 passes through spiral shell
Line is connect with the second hanging ring 43, and the second reamer 42 is connected through a screw thread with the first drill bit 46.
The coring method of the present invention includes the following steps：
A, connecting rod 25 and inner nut catch 27 are unloaded from power supply cavity pipe 23 first on raised platform around a well, the power supply substituted the bad for the good
24 are fitted into power supply cavity pipe 23, the entrance of moisture are avoided in loading procedure, and to examine the sealing performance of sealing ring 28；
B, lubricating oil is injected by oil nozzle 16 between first bearing 14 and top chock 15 and second bearing 17 is under
In gap between bearing block 18；Meet lubrication of the bearing in rotation process, heat dissipation and waterproof requirement；
C, inner tube assembly is transferred in hole and is crept into；
D, in dropping process, 25 lower end of connecting rod keeps contacting with 37 inner cavity top surface of the second cavity pipe, until the first cavity
Pipe 31 is contacted with power supply cavity pipe 23, and the conducting wire 30 in connecting rod 25 is connected to power-driven impactor 36 at this time, and power-driven impactor 36 is opened
Beginning work, whenever power-driven impactor 36 impacts certain depth, conducting wire 30 just can not be connected to power-driven impactor 36, until outer tube
After drilling depth and the drilling depth of inner tube reach certain distance, power-driven impactor 36 is just started to work again, it is ensured that drilling is set
Standby safety, due to the synergistic effect of top first bearing 14 and second bearing 17, inner tube is while percussion drilling not with outer
Pipe rotary drilling rotates, and due to the advanced drilling of inner tube, the flushing liquor for flowing through inner and outer pipe gap is difficult to be washed into natural gas
Hydrate rock core, avoids pollution and erosion of the gas hydrates rock core by flushing liquor, so utmostly to rock sample into
Fidelity is gone；
E, fisher is put into after drilling, the recovery hook on fisher is lockked spearhead 1 is dragged for, and it is total that inner tube is above put forward after latching
At, the first cavity pipe 31 and following drilling tool since its own gravity is moved down relative to fishing spearhead 1, when the length for carrying inner tube assembly
Equal to 25 lower end of connecting rod stroke when, continue carry inner tube assembly when, the stress of inner tube changes, by connecting rod 25
Lifting force and the downward stiction of gas hydrates rock core, the generation compressive deformation of spring 19 on top at this time, until second
Hanging ring 43 is contacted with the second seat ring 44, and the power suffered by core component connecting rod 25 reaches maximum value at this time, pulls off natural gas
The power of hydrate rock core is transmitted to outer tube, protects connecting rod 25 and inner tube that will not be damaged；At the same time, in connecting rod 25
Conducting wire 30 is connected to power supply 24 and refrigeration unit 32, and refrigeration unit 32 starts the cycle over refrigeration gas hydrates rock core；
F, after pulling off gas hydrates rock core, 25 lower face of connecting rod keeps connecing with 37 inner cavity top surface of the second cavity pipe
It touches, 32 persistent loop of refrigeration unit refrigeration gas hydrates rock core, ensure that gas hydrates rock core was being promoted at this time
It will not be decomposed in journey；
G, inner tube assembly should make power supply 24 not only disconnect refrigeration unit 32 but also disconnect power-driven impactor 36 after reaching ground,
And it unloads to be put into liquid nitrogen Cans after clip spring seat 48 takes out the gas hydrates rock core of freezing rapidly and preserve.
Impact rotating formula gas hydrate hole-bottom frozen cord coring drill of the present invention and method, extraction natural gas hydration
When object rock core, refrigeration unit 32 powers on the refrigerant in 24 circularly cooling freezing chambers 40, and refrigerant is then made by heat exchange
The temperature of gas hydrates rock core remains unchanged, and then inhibits the decomposition of gas hydrates, it can be achieved that being rapidly frozen, and freezes
Imitate, since traditional refrigeration mechanism is compared in the recycling of refrigerant, not only refrigeration is uniform, can also be effectively reduced cost and
Subsidiary operation time caused by due to supplementing refrigerant；Wire line coring is combined with hole-bottom frozen, realization, which does not carry, bores quick coring；
When drilling, the conducting wire 30 in connecting rod 25 is connected to power-driven impactor 36, and power-driven impactor 36 is started to work, whenever power-driven impactor
36 impact certain depth, and conducting wire just can not be connected to power-driven impactor 36, until the drilling depth of outer tube and the drilling of inner tube are deep
After degree reaches certain distance, just start to work again, it is ensured that the safety of drilling equipment, since the collaboration of two, top bearing is made
With inner tube does not rotate while percussion drilling with outer tube rotary drilling, since inner tube assembly does not turn round, thus largely
On avoid destruction of the mechanical force to gas hydrates rock core generated by drilling tool revolution, and because of the advanced drilling of inner tube,
Flushing liquor erosion gas hydrates rock core is effectively prevented, gas hydrates core recovery percentage, complete is more effectively improved
Whole degree and representativeness.
Claims (4)
1. impact rotating formula gas hydrate hole-bottom frozen cord coring drill, it is characterised in that：The core drill is by inner tube
Assembly and outer pipe assembly two parts are constituted, inner tube assembly include salvaging mechanism, bullet card detent mechanism, suspension mechanism, single action mechanism,
Buffer gear, beater mechanism and hole-bottom frozen mechanism,
The salvaging mechanism includes fishing spearhead (1), the first resilient key (2) and bullet card recovery tube (3), and fishing spearhead (1) passes through first
Resilient key (2) is hinged with bullet card recovery tube (3)；It is connect with fishing spearhead (1) after in fisher tripping in hole；Bullet card recovery tube (3) exists
Its own gravity and the downward vertical direction of fisher pulling force effect are promoted and are transferred；
The bullet card detent mechanism includes the second resilient key (4), adapter coupling (5), torsional spring (6), bullet card (7), third resilient key
(8) and play card holder (9), it is hinged by the second resilient key (4) with bullet card recovery tube (3) to play card holder (9), the second resilient key (4) with
The connection for playing card holder (9) is movable connection, to be fixedly connected between the second resilient key (4) and bullet card recovery tube (3), bullet card (7)
Quantity is two panels, and two panels bullet card (7) is stuck in adapter coupling (5), and passes through third resilient key (8) between two panels bullet card (7)
Rotation connection is formed, because torsional spring (6) keeps opening in bullet card holder (9), third resilient key (8) is bullet card (7) with card holder (9) is played
It is fixedly connected；
The suspension mechanism includes playing card holder (9), interior catcher (11), the first hanging ring (12) and the first seat ring (13), interior catcher
(11) it is connected through a screw thread with bullet card holder (9), while interior catcher (11) is connect by screw thread with the first hanging ring (12), inscribed
Equally distributed eight inclined holes are provided on hand (11), wherein four inclined holes are located above the first hanging ring (12), four additional is oblique
Hole is located at below the first hanging ring (12), after the first hanging ring (12) is contacted with the first seat ring (13), between inner tube and outer tube
Circulation passage is blocked, and mud is entered by being located at the inclined hole on interior catcher (11) top, from positioned at the oblique of interior catcher (11) lower part
Mud cycle is completed in hole outflow；First hanging ring (12) is that contact is connect with the first seat ring (13), and this contact connection makes
Inner tube assembly is suspended in outer pipe assembly；
The single action mechanism includes top chock (15), step (18), first bearing (14), second bearing (17) and oil nozzle
(16), top chock (15) is connected through a screw thread with interior catcher (11)；First bearing (14) top is contacted with top chock (15),
And rotated with top chock (15), first bearing (14) lower part contacts with step (18) and remains stationary as；Second bearing (17)
Top is contacted with step (18)；For oil nozzle (16) with step (18) by thread contact, lubricating oil passes through oil nozzle (16)
It is injected into the gap between first bearing (14) and top chock (15) between second bearing (17) and step (18)；
The buffer gear includes spring (19), baffle ring (20), gasket (21) and round nut (22), round nut (22) and upper bearing (metal)
Seat (15) is connected through a screw thread, and baffle ring (20) is fixed at the lower step of top chock (15) by gasket (21), bullet
Spring (19) lower part is contacted with baffle ring (20), and spring (19) top is contacted with second bearing (17)；
The beater mechanism includes power-driven impactor (36), power supply (24), connecting rod (25), electrode (26), conducting wire (30), interior spiral shell
Female catch (27), catch sealing ring (28), the first cavity pipe (31), the second cavity pipe (37) and the second drill bit (49), electrode
(26) be located at power supply (24) interior bone in, anode be located at cathode above, and respectively with two conducting wires in connecting rod (25)
(30) it contacts；Connecting rod (25) is placed through the internal through-hole of power supply (24) and is threadedly coupled with power supply cavity pipe (23), power supply
(24) by the way that be arranged successively can with refrigeration unit (32), power-driven impactor (36) formation in the internal conducting wire (30) of connecting rod (25)
Dynamic connection, power supply (24) are fixed in power supply cavity pipe (23)；Inner nut catch (27) is threadedly coupled with power supply cavity pipe (23),
It is provided with catch sealing ring (28) in the middle part of inner nut catch (27)；Screw thread between second cavity pipe (37) and the first cavity pipe (31)
Connection；Second drill bit (49) is connected through a screw thread with the second cavity pipe (37)；Power-driven impactor (36) is fixed on the first cavity pipe
(31) in；It is contacted with power supply cavity pipe (23) when the first cavity pipe (31) in inner tube assembly is moved upward to along connecting rod (25)
When reach the stroke upper limit of the first cavity pipe (31), conducting wire (30) powers on (24) and power-driven impactor (36) at this time, electricity
Dynamic impactor (36) is started to work, and the impact force of power-driven impactor (36) is transmitted to the second drill bit by the second cavity pipe (37)
(49) percussion drilling is carried out；
The hole-bottom frozen mechanism include refrigeration unit (32), power supply (24), connecting rod (25), conducting wire (30), freezing chamber (40),
Vacuum chamber (41), refrigerant input pipe (34), refrigerant efferent duct (51), basket (45), clamp spring (47), clip spring seat (48),
Non-return valve ball (38) and non-return valve seat (39), connecting rod (25) lower part sequentially pass through the first cavity pipe (31), refrigeration unit (32),
Cushioning piece (35), power-driven impactor (36) and the second cavity pipe (37), and with they formed movably connect, connecting rod (25) and
It is provided with sealing ring between first cavity pipe (31)；Refrigeration unit (32) located bolt (33) and the formation of the first cavity pipe (31)
It is fixedly connected, connecting rod (25) lower end reaches the first cavity pipe (31) when being contacted with second cavity pipe (37) inner cavity top surface
Lower travel limit, be reserved between the second hanging ring (43) and the second seat ring (44) for flushing liquor by gap, conducting wire at this time
(30) refrigeration unit (32) and power supply (24) are connected, freezing chamber (40) and vacuum chamber (41) are located at the second cavity pipe (37) inside,
Freezing chamber (40) and vacuum chamber (41) are coaxially arranged, and vacuum chamber (41) is located at freezing chamber (40) outside, and freezing chamber (40) is respectively
It is connected to form refrigerant-cycle systems with refrigeration unit (32) by refrigerant input pipe (34), refrigerant efferent duct (51)；It pulls out
When disconnected gas hydrates rock core, connecting rod (25) lower end reaches first when being contacted with second cavity pipe (37) inner cavity top surface
Cavity pipe (31) lower travel limit, the second hanging ring (43) are contacted with the second seat ring (44)；Second cavity pipe (37) and the second suspension
Ring (43) is connected through a screw thread, and basket (45) is connected through a screw thread with clip spring seat (48)；Non-return valve ball (38) passes through check (non-return) valve
Seat (39) is mounted on connecting rod (25) lower part；Clamp spring (47) seat is in the bellmouth of clip spring seat (48)；
Outer pipe assembly include adapter coupling (5), the first outer tube (10), the first reamer (50), the second reamer (42), outside second
Pipe (29), the second hanging ring (43) and the first drill bit (46), adapter coupling (5) are connected through a screw thread with the first outer tube (10), the
One outer tube (10) is connect by screw thread with the first reamer (50), and the second reamer (42) is connected with the second outer tube (29) by screw thread
It connects, the second outer tube (29) is connect by screw thread with the second hanging ring (43), and the second reamer (42) passes through with the first drill bit (46)
It is threadedly coupled.
2. impact rotating formula gas hydrate hole-bottom frozen cord coring drill according to claim 1, feature exist
In：The connecting rod (25) moves in a straight line in the hole of the second cavity pipe (37)；Freezing chamber (40) is the chamber for storing refrigerant
Body.
3. impact rotating formula gas hydrate hole-bottom frozen wire line coring method, which is characterized in that this method uses such as right
It is required that the core drill described in 1 or 2, specifically includes following steps：
A, connecting rod (25) and inner nut catch (27) are unloaded from power supply cavity pipe (23) first on raised platform around a well, the electricity substituted the bad for the good
Source (24) is fitted into power supply cavity pipe (23), and examines whether the sealing performance of catch sealing ring (28) reaches seal request；
B, lubricating oil is injected by oil nozzle (16) between first bearing (14) and top chock (15) and second bearing (17)
In gap between step (18)；
C, inner tube assembly is transferred in hole and is crept into；
D, connecting rod (25) lower end keeps contacting with second cavity pipe (37) inner cavity top surface, until the first cavity pipe (31) and power supply
Cavity pipe (23) contacts, and conducting wire (30) the connection power-driven impactor (36) in connecting rod (25), power-driven impactor (36) are opened at this time
Beginning work, conducting wire (30) can not be connected to power-driven impactor (36) after power-driven impactor (36) impacts certain depth, electronic punching
Device (36) is hit to be stopped, after the drilling depth of outer tube and the drilling depth of inner tube reach certain distance, power-driven impactor
(36) it starts to work；
E, fisher is put into after drilling, the recovery hook on fisher will drag for spearhead (1) and lock, and it is total that inner tube is above put forward after latching
Drilling tool at, the first cavity pipe (31) and below drags for spearhead (1) since self gravitation effect is opposite and moves down, inner tube assembly movement
Length when being equal to the stroke of the first cavity pipe (31), continue above to carry inner tube assembly until the second hanging ring (43) and the second seat ring
(44) it contacts, the power suffered by connecting rod (25) reaches maximum value at this time, and the power for pulling off gas hydrates rock core is transmitted to outside
Pipe, at the same time, conducting wire (30) the connection power supply (24) in connecting rod (25) and refrigeration unit (32), refrigeration unit (32) start
Circularly cooling gas hydrates rock core；
F, after pulling off gas hydrates rock core, connecting rod (25) lower face keeps connecing with second cavity pipe (37) inner cavity top surface
It touches, refrigeration unit (32) continues cycling through refrigeration gas hydrates rock core at this time；
G, inner tube assembly reaches the connection of deenergization (24) and refrigeration unit (32) and power-driven impactor (36) behind ground, unloads
Clip spring seat (48) is put into liquid nitrogen Cans after taking out the gas hydrates rock core of freezing and preserves.
4. impact rotating formula gas hydrate hole-bottom frozen wire line coring method according to claim 3, feature exist
In：When salvaging rock core, the first cavity pipe (31) comes downwards to the lower travel limit of the first cavity pipe (31), and conducting wire (30) is by refrigeration machine
Group (32) is connected with power supply (24), refrigeration unit (32) circularly cooling agent, and refrigerant is realized by heat exchange and is hydrated to natural gas
The freezing of object rock core.
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| CN109098679A (en) * | 2018-09-03 | 2018-12-28 | 吉林大学 | Ocean gas hydrate freezing by change of state cord coring drill and coring method |
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| CN109113613B (en) * | 2018-09-03 | 2020-06-12 | 吉林大学 | Natural gas hydrate rotary type freezing pressure maintaining rope coring drilling tool and coring method |
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| CN110219612B (en) * | 2019-07-18 | 2023-11-28 | 长沙矿山研究院有限责任公司 | Submarine pressure-maintaining coring drilling tool inner pipe and operation method |
| CN111577182A (en) * | 2020-04-30 | 2020-08-25 | 北京探矿工程研究所 | Deep sea hard rock efficient rope coring system and coring drilling method thereof |
| CN111577182B (en) * | 2020-04-30 | 2022-03-29 | 北京探矿工程研究所 | Deep sea hard rock efficient rope coring system and coring drilling method thereof |
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