CN101514614A - Dry ice sublimation hole bottom refrigerating and pressure keeping sampler and sampling method - Google Patents

Abstract

The invention relates to a dry ice sublimation hole bottom refrigerating and pressure keeping sampler and a sampling method. The device is mainly composed of a suspension differential action mechanism, a single action mechanism, a control mechanism, a refrigerating mechanism and a pressure keeping mechanism. The method comprises: using dry ice as refrigerant, alcohol as refrigeration assisting catalyst and secondary refrigerant, and applying low temperature alcohol to the hole bottom to refrigerate the rock core; closing a ball valve to keep pressure of the rock sample so as to inhibite the decomposition of the hydrate rock core; dismounting a blocking tube and a drill bit when sampling, dismounting a clamp spring and a clamp spring seat, pulling out a half combining tube and the rock core from the rock core tube, and using a liquid nitrogen holdup vessel or a high pressure container to keep the rock core sample. When drilling for sampling the rock core, the external tube and the drill bit gyre, but the internal tube assembly does not gyre, thus avoiding the damage of mechanical force to the rock core caused by the gyrus of the drilling tool to a larger degree, improving the rock core sampling rate, integrity and representativeness more effectively, and realizing pure refrigeration sampling as well as a combination of refrigeration sampling and rock core pressure keeping; compared with the prior art, the invention has simple process, convenient operation and greatly reduces the cost.

Description

Dry ice sublimation hole bottom refrigerating and pressure keeping sampler and sampling method

Technical field:

The present invention relates to a kind of drill sampling utensil, in particular for the gas hydrates dry ice sublimation hole bottom refrigerating and pressure keeping sampler tool and the sampling method of seabed or land permafrost haorizon fidelity.

Background technology:

Along with the arriving in soaring oil prices epoch, expediting the emergence of the various alternative energy has become the task of top priority.The carbon total amount of methane is equivalent to the twice of fossil fuel total resources such as current known coal, oil and natural gas in the present global sea bed gas hydrate.Thereby gas hydrates become the important reserve energy that countries in the world must take in the energy strategy balanced growth.Drill sampling is the most direct methods of identification gas hydrates, also is the necessary means of checking additive method investigation achievement.Therefore, drill sampling has crucial meaning for the development of natural gas hydrate.

Existing gas hydrates sampler is mainly based on pressure keeping sampler, its mentality of designing is after the hydrate rock core enters pressurize core chamber, closing the basket bottom by ball valve makes rock core keep initial pressure, and utilize the pressure compensator controlled pressure, remain unchanged to keep in the whole process of rock core pressure at the bottom of lifting from the hole, carry out freezing preservation again after mentioning the face of land.The heat preserving method of rock core mainly is to adopt heat insulating material to realize the passive type heat preserving method in the hole.Thisly suppress decomposition of hydrate by the mechanical type pressurize, this requirement for the intensity of the intensity of whole corer, particularly ball valve and sealing is just quite high.If the sealing of ball valve is some decline slightly, rock core just can not keep initial pressure so, and failure causes coring.And after the design pressure of sampler acquires a certain degree, if think will increase pressure again, so the material of sampler and and sealing performance needs are done very big raising, and this and be not easy to accomplish.

Summary of the invention:

Purpose of the present invention is exactly at deficiency of the prior art, and a kind of dry ice sublimation hole bottom refrigerating and pressure keeping sampler that is used for seabed or land permafrost haorizon fidelity is provided;

Another object of the present invention provides a kind of dry ice sublimation hole bottom refrigerating and pressure keeping sampling method that is used for seabed or land permafrost haorizon fidelity.

The objective of the invention is to be achieved through the following technical solutions:

Employing dry ice is refrigerant, and alcohol utilizes low temperature alcohol at the hole-bottom frozen rock core for helping cold catalyzer and refrigerating medium; And carry out the rock sample pressurize by closing ball valve, decompose thereby suppress the hydrate rock core.

Dry ice sublimation hole bottom refrigerating and pressure keeping sampler comprises five principal organ, promptly hangs differential attachment, single action mechanism, controlling organization, freezing mechanism and pressure-keeping mechanism.

Dry ice sublimation hole bottom refrigerating and pressure keeping sampler comprises: take over 1 outward and be threaded with top rod, outer catcher 1 is connected with outer six sides catcher 6 by screw thread, interstage sleeve 2 is threaded with outer six sides catcher 6 by screw, sliding sleeve 5 and outer six sides catcher, 6 matched in clearance, interstage sleeve 2 restriction sliding sleeves 5 outwards do not slide, in six sides take over 7 and be threaded with outer tube 12, outer six sides catcher 6 and 7 of interior six sides catchers pass through six faceted pebbles revolution transmissions, drilling rod passes to outer six sides catcher 6 with turning power, by six faceted pebbles turning power is passed to interior six sides catcher 7, interior six sides catcher 7 passes to turning power outer tube 12 again, radial direction is equipped with ball cover 9 on six faceted pebbles of interior six sides catcher 7, ball cover 9 outsides are the conical surface, two steel balls 8 are housed in each ball cover 9, ball cover 9 closely cooperates with outer six sides catcher 6, sliding sleeve spring 10 upper ends are supported through interstage sleeve 2 by sliding sleeve 5, sliding sleeve spring 10 lower ends are sitting on the step of outer six sides catcher, 6 endoporus by packing ring 11, be provided with axial hollow apart from 200mm-210mm between interior six sides catcher 7 and the outer six sides catcher 6, six sides catcher, 6 distances that move down in the restriction, interior six sides catcher 7 moves downward to the lower end of basket 47 together with outer tube 12 and drill bit 68 promotion ball valves 56, make ball valve 56 be separated from the constraint of basket 47, make ball valve 56 upset back seal rock core barrels 47;

Outer six sides catcher 6 is connected with axle 13 by screw thread, and axle 13 realizes by bearing that with single action between the catcher 14 axle 13 revolutions or not and take over 14, and axle 13 passes through packing ring 15 and takes over 14 and be connected, and takes over 14 and is connected with piston cavity 18 by screw thread; Piston cavity 18 upper ends are provided with plug 16, plug 16 is connected with piston cavity 18 by screw thread, 17 precompressed of earial drainage spring are installed in the current by pass, its upper end is supported by plug 16, the lower end is supported by steel ball 19, piston cavity 18 bottoms are connected with joint 22 by screw thread, piston spring 21 precompressed are installed in the piston cavity 18, its upper end is supported by piston 20, the lower end is supported by joint 22, control lever 25 is sleeved in the cavity of piston spring 21, it is upper to guarantee that piston 20 is under spring action all the time, the upper end of control lever 25 and piston 20 are connected by nut, the lower end is connected with valve body 28, piston 20 is slidingly matched with piston cavity 18, piston 20 drives control lever 25 and valve body 28 moves, valve body 28 is connected with control lever 25 by screw thread, piston cavity 18 is connected with alcohol cavity 24 by screw thread, the Internal and external cycle of alcohol cavity piston 23 respectively and 25 of alcohol cavity 24 and control levers seal with the O RunddichtringO, spilling smart cavity 24 is connected with alcohol cavity connector 27 by screw thread, valve body 28 adopts the conical surface and O RunddichtringO and 27 sealings of alcohol cavity connector, and compress by nut, alcohol cavity connector 27 sides are provided with plug screw 26, back out plug screw 26 during dress alcohol, alcohol enters alcohol cavity 24 thus, and tube connector 29 is connected with alcohol cavity connector 27 by screw thread, adopts rubber cushion 30 to compress sealing between the two;

Tube connector 29 is connected with catcher 31 on the dry ice cavity by screw thread, adopts rubber cushion 30 to compress sealing between the two; Catcher 31 is threaded with dry ice cavity pipe 37 on the dry ice cavity, catcher 31 is by being threaded on one-way exhaust valve 42 and the dry ice cavity, 31 of catchers closely cooperate on alcohol ascending pipe 36 and the dry ice cavity, and dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Catcher 31 quiet contacts on insulation loam cake 33 and the dry ice cavity, insulation loam cake 33 and dry ice cavity pipe 37 matched in clearance.Dry ice insulation bushing pipe 35 and insulation loam cake 33 quiet contacts, muff 34 and dry ice cavity pipe 37 matched in clearance, muff 34 and 35 of dry ice insulation bushing pipes are gluing connecing, in the ring cavity of dry ice insulation layer 38 between dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and muff 34, dry ice insulation layer 38 is quiet the contact with dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and 34 of muffs.Insulation lower cover 39 is quiet the contact with 34 of dry ice insulation bushing pipe 35 and muffs.Insulation lower cover 39 and dry ice cavity pipe 37 matched in clearance.Cylindrical space between insulation loam cake 33, insulation lower cover 39 and the dry ice insulation bushing pipe 35 is the dry ice storage silo.Cover 40 is quiet the contact with 39 of insulation lower covers, and cover 40 and dry ice cavity pipe 37 matched in clearance, cover 40 are taken over 41 down with the dry ice cavity and be quiet the contact.Dress is during dry ice, with the dry ice cavity down catcher 41 unload, in dry ice cavity pipe 37, take out cover 40 and insulation lower covers 39, with the dry ice dry ice storage silo of packing into.Dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Dry ice cavity down catcher 41 is threaded with basket 47 and bushing pipe 45, and bottom 63 is connected with bushing pipe 45 by screw thread, seal with O ring between bottom 63 and the basket 47.Rubber cushion 61 and bottom muff 62 compress by bottom 63 and bushing pipe 45 and basket 47, and insulation bushing pipe 57 and dry ice cavity catcher 41 down are quiet the contact with rubber cushion 61, insulation bushing pipe 57 and bushing pipe 45 matched in clearance.The dry ice cavity down annulus of 50 of catcher 41, basket 47, insulation bushing pipe 46 and rubber cushions is the storage area that alcohol is injected into the low temperature alcohol that the dry ice storage silo forms.Draining valve body 55 is taken over 41 down by screw thread and dry ice cavity and is connected, last pressurize spring 64 precompressed are installed, the lower end is supported by steel ball 65, the upper end is by catcher 41 supports down of dry ice cavity, basket 47 is connected with clip spring seat 66 by screw thread, and clip spring seat 66 contacts with jump ring 67 conical surfaces, and pipe 59 and basket 47 matched in clearance narrow, pipe 58 upper ends and dry ice cavity catcher 41 quiet contacts the down that narrow, pipe 58 lower ends that narrow are by steps supports in the clip spring seat 66;

Reamer 60 is connected with outer tube 12 by screw thread, last screens pipe 53 is connected with reamer 60 by screw thread, the axial distance that the interior ledge of last screens pipe 53 and pressurize chamber enclosure are 54 is 5-10mm, last screens pipe 53 is connected with following screens pipe 63 by screw thread, following screens pipe 63 is connected with drill bit 68 by screw thread, 52 quiet contacts of pressurize chamber enclosure 54 and bottom, pressurize chamber enclosure 54 is connected with ball valve bottom 64 by screw thread, ball valve bottom 64 is connected with bucker 65 by screw thread, joint ring 55 compresses ball valve 56, joint ring 55 is sitting on the pressurize chamber enclosure 54 and closely cooperates, pressurize chamber ball valve 56 is connected with screens pin 57 by screw thread, one end of ball valve axle 59 is connected with ball valve 56 by flat key 58, the other end seat of ball valve axle 59 is in screw pitch nut 61, torsion spring 60 is enclosed within on the ball valve axle 59, torsion spring 60 1 ends and ball valve 56 are fixing, the other end and adjusting nut 61 are fixing, adjusting nut 61 is connected with pressurize chamber enclosure 54 by screw thread, locating part 62 is in the annulus of 56 of pressurize chamber enclosure 54 and ball valves, clip spring seat 66 is connected with basket 47 by screw thread, jump ring 67 has male cone (strobilus masculinus), and clip spring seat 66 has inner conical surface, and jump ring 67 is connected by the conical surface and clip spring seat 66.When carrying sampler, jump ring 67 is held rock core tightly, and breaks rock core by conical surface displacement last, and drill bit 68 is connected down on the screens pipe 63.

The dry ice sublimation hole bottom refrigerating and pressure keeping sampling method comprises following order and step:

A, when round trip end of a period rock core is full of basket, drilling rod is carried in termination of pumping, makes sampler lift from about one meter distance at the bottom of the hole;

B, in drilling rod, drop into steel ball 3 on the face of land, steel ball 3 drops on the sliding sleeve 5, turn on pump, it is descending that steel ball 3 promotes sliding sleeve 5, make its inner annular groove arrive steel ball 8 positions, in six sides catcher 7 promote ball valves 56 together with outer tube 12 and drill bit 68 and move downward to the lower end of basket 47, make ball valve 56 be separated from the constraint of basket 47, seal rock core barrels 47 after ball valve 56 upsets;

C, pressurize rock core: at first bottom pressurize, both ball valve 56 upset back seal rock core barrels 47 were realized the bottom pressurize.Upper end pressurize then, under last pressurize spring 42 pretension effects, basket 47 internal pressures are controlled at below the 0.3MPa, and steel ball 43 is pressed on the draining valve body 44, gas is not overflowed and pressurize on realizing;

D, freezing core: when sliding sleeve 5 comes downwards to six radial passages of outer six sides catcher 6, flushing liquor is through these six radial passages, arrive piston 20 through outer six sides catcher 6, axle 13 mesopores, piston 20 comes downwards to three radial passages of piston cavity 18, flushing liquor arrives alcohol cavity piston 23 through these three radial passages through piston cavity 18.Piston cavity 18 is descending, after normal temperature alcohol extruded from alcohol cavity 24, through alcohol cavity connector 27, valve body 28, three axial passages on catcher 31 tops enter alcohol ascending pipe 36 on the dry ice cavity, be re-introduced between insulation loam cake 33, insulation lower cover 39 and the dry ice insulation bushing pipe 35 in the middle part of the dry ice storage silo.The heat absorption that distils fast of normal temperature alcohol catalysis dry ice makes normal temperature alcohol become low temperature alcohol.Low temperature alcohol is through five axial passages of 39 of insulation lower cover, through overlap 40 and the dry ice cavity down seven inclined holes on the catcher 41 enter in the ring cavity that forms between the catcher 41 dry ice cavity under, basket 47, rubber cushion 50 and the insulation bushing pipe 46, thereby by low temperature alcohol realization hole-bottom frozen rock core.

E, sampler is proposed to the face of land at hole-bottom frozen 5-10 minute;

F, will go up screens pipe 53 at last screens pipe 53 with the junction of reamer 49 and together unload, unload clip spring seat 66 and jump ring 67 together with drill bit 68;

G, the pipe 48 that will narrow are together extracted out in basket 47 together with core sample;

H, pipe 48 two ends that will narrow seal with plug, and core sample is preserved together with narrow pipe 48 usefulness nitrogen storage tank or high-pressure bottle.

Purpose of the present invention can also be achieved through the following technical solutions:

The external surface of sliding sleeve 5 lower ends is provided with endless groove, can freezing core can also the pressurize rock core, when the external surface of sliding sleeve 5 does not have endless groove, can only realize freezing core and can not the rock core pressurize; All respectively be provided with at least one radially flow channels on six end faces in the outer six sides catcher 6; Piston cavity 18 inside are provided with three radially flow channels; Piston cavity 18 inside are provided with three radial drainage passages; Catcher 31 tops are provided with three axially extending bores on the dry ice cavity; The dry ice cavity is provided with seven inclined holes in catcher 41 tops down; Adopt three layers of cold insulation structure to preserve dry ice in the down-hole, promptly hard polyaminoester dry ice insulation bushing pipe 35, foamed polyurethane dry ice insulation layer 38 and insulation are coated with lacquer respectively from the inside to the outside; Basket 47 adopts the cold face temperature etc. structure.Employing dry ice is refrigerant, and alcohol by dry ice sublimation absorption refrigeration alcohol at the bottom of the hole, and utilizes low temperature alcohol at the hole-bottom frozen rock core for helping cold catalyzer and refrigerating medium.

Beneficial effect: the present invention is creeping into outer tube and drill bit revolution when coring, inner tube assembly does not turn round, thereby avoided largely turning round the destruction of the mechanical force of generation to the hydrate rock core because of drilling tool, core recovery percentage, integrity degree and representativeness have more effectively been improved, and adopt the quick sampling surface of tubular type that narrows, can obtain rock core fast on the face of land.Sampler can be realized simple freezing sampled functions, also can realize freezing sampling and pressurize rock core function simultaneously, and compared with prior art technology is simple, and is easy and simple to handle, greatly reduced cost.

Description of drawings

Fig. 1 is: the dry ice sublimation hole bottom refrigerating and pressure keeping sampler structure chart;

Fig. 1 a right-hand member connection layout 1b left end, the right-hand member connection layout 1c left end of Fig. 1 b, Fig. 1 c right-hand member connection layout 1d left end.

Fig. 2 is: a figure A-A sectional top view in the accompanying drawing 1

Fig. 3 is: b figure B-B sectional top view in the accompanying drawing 1

Fig. 4 is: c figure C-C sectional top view in the accompanying drawing 1

Fig. 5 is: c figure D-D sectional top view in the accompanying drawing 1

Fig. 6 is: c figure E-E sectional top view in the accompanying drawing 1

Fig. 7 is: c figure F-F sectional top view in the accompanying drawing 1

Fig. 8 is: c figure K-K sectional top view in the accompanying drawing 1

1 outer catcher, 2 interstage sleeves, 3 steel balls, 4 rubber cushions, 5 sliding sleeves, 6 outer six sides catchers, 7 interior six sides catchers, 8 steel balls, 9 ball covers, 10, sliding sleeve spring, 11 packing rings, 12 outer tubes, 13,14 catchers, 15 packing rings, 16 plugs, 17 earial drainage springs, 18 piston cavities, 19 steel balls, 20 pistons, 21 piston springs, 22 joints, 23 alcohol cavity pistons, 24 alcohol cavitys, 25 control levers, 26 plug screws, 27 alcohol cavity connectors, 28 valve bodies, 29 tube connectors, the 30-rubber cushion is taken on the 31 dry ice cavitys, 32 one-way exhaust valves, 33 insulation loam cakes, 34 muffs, 35 dry ice insulation bushing pipe, 36 alcohol ascending pipes, 37 dry ice cavity pipes, 38 dry ice insulation layers, 39 insulation lower covers, 40 covers, 41 dry ice cavitys are catcher down, pressurize spring on 42,43 steel balls, 44 draining valve bodies, 45 bushing pipes, 46 insulation bushing pipes, 47 baskets, 48 pipes that narrow, 49 reamers, 50 rubber cushions, 51 bottom muffs, 52 bottoms, screens pipe on 53,54 pressurize chamber enclosures, 55 joint rings, 56 ball valves, 57 screens pins, 58 flat keys, 59 ball valve axles, 60 torsion springs, 61 adjusting nuts, 62 locating parts, 63 times screens pipes, 64 ball valve bottoms; 65 buckers, 66 clip spring seats, 67 jump rings, 68 drill bits.

The specific embodiment

Be described in further detail below in conjunction with drawings and Examples:

A figure right-hand member connects b figure left end in the accompanying drawing 1, and the right-hand member of b connects c figure left end, and the left end that the right-hand member of c connects d constitutes gas hydrate hole-bottom frozen pressure keeping sampler overall structure figure.

Employing dry ice is refrigerant, and alcohol utilizes low temperature alcohol at the hole-bottom frozen rock core for helping cold catalyzer and refrigerating medium; Carry out the rock sample pressurize by closing ball valve simultaneously, decompose thereby suppress the hydrate rock core.

Dry ice sublimation hole bottom refrigerating and pressure keeping sampler comprises five principal organ, promptly hangs differential attachment, single action mechanism, controlling organization, freezing mechanism and pressure-keeping mechanism.

Embodiment 1

Hang differential attachment: take over 1 outward and be threaded with top rod, outer catcher 1 is threaded with outer six sides catcher 6, between outer six sides catcher 6 takes over 7 with interior six sides by inside and outside six side's transmissions, in six sides take over 7 and be threaded with outer tube 12, interstage sleeve 2 is threaded with outer six sides catcher 6 by screw, and interstage sleeve 2 restriction sliding sleeves 5 outwards do not slide.Sliding sleeve 5 is slidingly matched with outer six sides catcher 6, packing ring 11 is sitting on the step of outer six sides catcher, 6 internal holes, 10 precompressed of sliding sleeve spring are installed, two ends are supported by packing ring 11 and sliding sleeve 5 respectively up and down, steel ball 8 is contained in the ball cover 9, ball cover 9 outsides are the conical surface, prevent that steel ball 8 from outwards sliding, steel ball 8 has 12, ball cover 9 is installed outside in the radial hole of six end faces of six sides catcher 6 respectively, ball cover 9 closely cooperates with outer six sides catcher 6, in cavity axial distance between six sides catcher 7 and the outer six sides catcher 6 be 205mm, therefore in six sides catcher, 6 distance limit that move down be 205mm, this is apart from guaranteeing that interior six sides take over 7 and move downward to the lower end of basket 47 together with outer tube 12 and drill bit 68 promotion pressure-keeping mechanism ball valves 56, make ball valve 56 be separated from the constraint of basket 47, thereby realize ball valve 56 upset back seal rock core barrels 47.

When the external surface of sliding sleeve 5 lower ends is provided with endless groove, can realize freezing core and pressurize rock core function, when the external surface of sliding sleeve 5 does not have endless groove, can only realize simple freezing core function.The power that feeds takes over 1 outside drilling rod passes to, pass to outer tube 12 through interior six sides catcher 7, finally is passed to drill bit 68 fractured rocks.Turning power takes over 1 outside drilling rod is passed to, take over 1 outward and transmit rotary torque to outer six sides catcher 6, transmits rotary torque through inside and outside six sides, and turning power is passed to interior six sides catcher 7, and rotary torque is passed to drill bit 68 fractured rocks through outer tube 12.Realize inside and outside six square shafts to the location by steel ball 8, thereby realize the hanging function between the inside and outside six sides catcher.Between the inside and outside six sides catcher two Φ, 12 steel balls 8 are set respectively on its six end face directions, steel ball 8 amounts to 12.One side seat of steel ball 8 is in the annular awl groove of interior six sides catcher 7, and the other end is installed in the ball cover 9.Sliding sleeve 5 is under the pretightning force effect of sliding sleeve spring 10, and the complete outer round surface of its lower end contacts with steel ball 8 all the time, so steel ball 8 can not move to the inside, and is spacing in realizing.Stretch out in the annular awl groove that enters interior six sides catcher 7 in the outside of steel ball, therefore can move laterally.Inside and outside two of steel ball 8 all has spacingly, so steel ball 8 can be to two side shiftings, thereby realizes the axial hanging function of inside and outside six sides between taking over.Because outside steel ball enters the interior 5mm of the annular grooving of interior six sides catcher 7, realizes inside and outside six sides' axial limiting, no axial relative motion between six sides inside and outside so just guaranteeing, six sides' hanging function in realizing.When creeping into a round trip, after rock core is full of basket, in sampler, drop into steel ball 3 from the face of land through the drilling rod internal channel, owing to stop up flushing liquor normal circulation passage, under the effect of flushing liquor pressure, sliding sleeve 5 moves down 24mm, make the ring-type grooving of sliding sleeve 5 lower ends all arrive steel ball 8 places, under the action of gravity of interior six sides catcher 7 and outer tube 12, also the circular cone owing to interior six sides catcher 7 contacts with steel ball 8, thereby promote steel ball 8 and move the interior spacing disappearance of steel ball 8 so to the inside.There is not axial limiting between inside and outside six sides, under the effect of outer tube 12 gravity, interior six sides catcher 7 moves down, and displacement is limited in 205mm, can guarantee that in distance basket 47 bottom relative displacements to apart from pressure-keeping mechanism ball valve 56 sphere 30mm, guarantee ball valve 56 accessible closing under twisting force.If the external surface of sliding sleeve 5 all adopts smooth disc structure, sliding sleeve 5 is in the process that flushing liquor pressure moves down so, its external surface limits moving of steel ball 8 all the time, it is spacing in steel ball 8 exists all the time, just do not have differential function between the inside and outside like this six sides catcher, thereby can not realize the pressure holding function of sampler.And can only realize the freezing function of sampler.After sliding sleeve 5 moves down 35mm, 6 of outer six sides catcher 6 radially pod apertures expose, flushing liquor enters through this passage, and then realizes follow-up alcohol function of injecting and freezing function.

Single action mechanism: be threaded between outer six sides catcher 6 and the axle 13, axle 13 and take over 14 between pass through bearings.The catcher 14 with piston cavity 18 between be threaded.Outer six sides catcher 6 drives axle 13 revolutions, under the effect of thrust ball bearing, realizes inner and outer pipes assembly transfer function, i.e. the single action function.When drive sampling is turned round, take over 1 outward, outer six sides catcher 6, axle 13 revolutions, catcher 14 does not turn round.Be connected with the bottom inner tube assembly and take over 14, thereby realize that inner tube assembly does not turn round.

Controlling organization: the upper end of control lever 25 and control piston 20 are fixed by round nut, and joint 22 relies on and is threadedly connected to piston cavity 18 bottoms.Control piston spring 21 belongs to the compression spring, and precompressed is installed in the piston cavity 18, and it is supported by piston 20 and joint 22 at two ends up and down, and it is upper to guarantee that piston 20 is under the effect of spring force all the time.Piston 20 is slidingly matched with piston cavity 18.

Alcohol cavity 24 is threaded with piston cavity 18, the Internal and external cycle of alcohol cavity piston 23 respectively and 25 of alcohol cavity 24 and control levers with the contact seal of O RunddichtringO.Spilling smart cavity 24 is threaded with alcohol cavity connector 27.Valve body 28 is connected with control lever 25 by screw thread, and valve body 28 adopts the conical surface and O RunddichtringO and 27 sealings of alcohol cavity connector, compresses by nut, prevents that alcohol from overflowing.Alcohol cavity connector 27 sides are provided with plug screw 26, back out plug screw 26 when alcohol is installed, and alcohol is in this hole enters to alcohol cavity 24.Control lever 25 upper ends are connected with piston 20, through joint 22 mesopores, pass alcohol cavity piston 23 interstitial holes, alcohol cavity connector 27 interstitial holes, and finally its lower end is connected with valve body 28.Mobile drive control lever 25 and valve body 28 by piston 20 move.Tube connector 30 is threaded with alcohol cavity connector 27, adopts rubber cushion 30 to compress sealing between the two.Piston cavity 18 upper ends are provided with plug 16, and plug 16 is threaded with piston cavity 18, and 17 precompressed of earial drainage spring are installed respectively in three discharge orifices, and it is supported by plug 16 and steel ball 19 respectively at two ends up and down.Alcohol is stored in the alcohol cavity 24 between alcohol cavity piston 23 and the valve body 28 in advance.Flushing liquor is after single action mechanism flows into controlling organization, and it is descending to promote piston 20, and it is descending to drive control lever 25, and when they descending 15mm, valve body 28 is opened, and valve body 28 breaks away from alcohol cavity connector 27, and alcohol relies on deadweight to flow out.Because shaft bottom head of liquid, alcohol can't all rely on from reentering the dry ice layer, must adopt the mode that is pressed into to make alcohol be pressed into the dry ice layer.Therefore, design alcohol cavity piston 23, when piston 20 continues descending 25mm, be that Bottom Runby is when reaching 40mm, three of piston cavity 18 radially pod apertures open, flushing liquor flow to alcohol cavity piston 23 through this, because the Internal and external cycle of alcohol cavity piston 23 is used O RunddichtringO and supporting surface contact seal respectively, alcohol cavity piston 23 extrudes alcohol to lower slider in alcohol cavity 24 under the effect of flushing of hydraulic power, be injected into the dry ice layer, guarantee that alcohol can not overflow because of piston moves down upwards.When alcohol all extruded from alcohol cavity 24, alcohol cavity piston 23 came downwards to alcohol cavity connector 27, and flushing liquor is full of the cavity between piston cavity 18 and the alcohol cavity connector 27.At this moment, the pressure of flushing liquor continues to increase, and when increasing to 2MPa, flushing liquor flow to steel ball 19 through three discharge orifices, and earial drainage spring 17 is opened, and flushing liquor flows out through three delivery ports in piston cavity 18 outsides, reaches the release purpose.This moment, the surface water pump pressure can return to normal pressure value from big force value, showed that alcohol all extrudes.Promptly know promptly by observing water-aspirator pressure whether alcohol all is injected into the dry ice layer on the face of land.

Freezing mechanism: tube connector 29 is connected with catcher 31 on the dry ice cavity by screw thread, adopts rubber cushion 30 to compress sealing between the two; Catcher 31 is threaded with dry ice cavity pipe 37 on the dry ice cavity, catcher 31 is by being threaded on one-way exhaust valve 42 and the dry ice cavity, 31 of catchers closely cooperate on alcohol ascending pipe 36 and the dry ice cavity, and dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Catcher 31 quiet contacts on insulation loam cake 33 and the dry ice cavity, insulation loam cake 33 and dry ice cavity pipe 37 matched in clearance.Dry ice insulation bushing pipe 35 and insulation loam cake 33 quiet contacts, muff 34 and dry ice cavity pipe 37 matched in clearance, muff 34 and 35 of dry ice insulation bushing pipes are gluing connecing, in the ring cavity of dry ice insulation layer 38 between dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and muff 34, dry ice insulation layer 38 is quiet the contact with dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and 34 of muffs.Insulation lower cover 39 is quiet the contact with 34 of dry ice insulation bushing pipe 35 and muffs.Insulation lower cover 39 and dry ice cavity pipe 37 matched in clearance.Cylindrical space between insulation loam cake 33, insulation lower cover 39 and the dry ice insulation bushing pipe 35 is the dry ice storage silo.Cover 40 is quiet the contact with 39 of insulation lower covers, and cover 40 and dry ice cavity pipe 37 matched in clearance, cover 40 are taken over 41 down with the dry ice cavity and be quiet the contact.Dress is during dry ice, with the dry ice cavity down catcher 41 unload, in dry ice cavity pipe 37, take out cover 40 and insulation lower covers 39, with the dry ice dry ice storage silo of packing into.Dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Dry ice cavity down catcher 41 is threaded with basket 47 and bushing pipe 45, and bottom 63 is connected with bushing pipe 45 by screw thread, seal with O ring between bottom 63 and the basket 47.Rubber cushion 61 and bottom muff 62 compress by bottom 63 and bushing pipe 45 and basket 47, and insulation bushing pipe 57 and dry ice cavity catcher 41 down are quiet the contact with rubber cushion 61, insulation bushing pipe 57 and bushing pipe 45 matched in clearance.The dry ice cavity down annulus of 50 of catcher 41, basket 47, insulation bushing pipe 46 and rubber cushions is the storage area that alcohol is injected into the low temperature alcohol that the dry ice storage silo forms.Draining valve body 55 is taken over 41 down by screw thread and dry ice cavity and is connected, last pressurize spring 64 precompressed are installed, the lower end is supported by steel ball 65, the upper end is by catcher 41 supports down of dry ice cavity, basket 47 is connected with clip spring seat 66 by screw thread, and clip spring seat 66 contacts with jump ring 67 conical surfaces, and pipe 59 and basket 47 matched in clearance narrow, pipe 58 upper ends and dry ice cavity catcher 41 quiet contacts the down that narrow, pipe 58 lower ends that narrow are by steps supports in the clip spring seat 66;

For improving dry ice, adopt three layers of cold insulation structure at down-hole cold insulation dry ice in the holding time of down-hole.Outside the dry ice storage silo, be with three layers of cold insulation structure, be respectively from the inside to the outside: hard polyaminoester dry ice insulation bushing pipe 35, foamed polyurethane dry ice insulation layer 38 and insulation lacquer.Simultaneously, being respectively equipped with material at the two ends up and down of dry ice storage silo is the insulation loam cake 33 and the insulation lower cover 39 of hard polyaminoester, with the holding time of further raising dry ice in the down-hole.

For strengthening the thermal conductivity of basket 47, its material adopts brass material.There is kerve on its surface, promptly adopts the cold face temperature etc. structure.

Obtain rock core fast for being implemented in the face of land, the pipe 48 that narrows is set.After sampler extracts the face of land, needn't unload heavy outer tube 12, and only need to unload the screens pipe at last screens pipe 53 and reamer 49 junctions, and unload in the lump together with pressure-keeping mechanism and drill bit 68, unload clip spring seat 66 and jump ring 67, the pipe 48 that can will narrow is extracted out in basket 47 in the lump fast together with core sample, thereby reduces the soil surface treatment time of staying of hydrate rock core, further improves rock core fidelity degree.

Pressure-keeping mechanism: be threaded between reamer 49 and the outer tube 12, last screens pipe 53 is threaded with 49 of reamers, and the axial distance that the interior ledge of last screens pipe 53 and pressurize chamber enclosure are 54 is 5mm.Last screens pipe 53 is threaded with following screens pipe 63, and following screens pipe 63 is threaded with drill bit 68.Pressurize chamber enclosure 54 is connected with dry ice bushing pipe bottom 41 nothings.Pressurize chamber enclosure 54 is threaded with ball valve bottom 64, and ball valve bottom 64 is threaded with bucker 65, and joint ring 55 compresses ball valve 56, and joint ring 55 is sitting on the pressurize chamber enclosure 54 and closely cooperates, and pressurize chamber ball valve 56 is threaded with screens pin 57.Ball valve 56 is connected by flat key 58 with ball valve axle 59.The other end seat of ball valve axle 59 is in adjusting nut 61.Torsion spring 60 is enclosed within on the ball valve axle 59, and torsion spring 60 1 ends and ball valve 56 are fixing, and the other end is connected with adjusting nut 61.Adjusting nut 61 is threaded with pressurize chamber enclosure 54.Locating part 62 is contained in the annulus of 56 of pressurize chamber enclosure 54 and ball valves.Clip spring seat 55 is connected with basket 47 by screw thread, and jump ring 56 has male cone (strobilus masculinus), and clip spring seat 55 has inner conical surface, and jump ring 56 is by the conical surface and clip spring seat 55 cone match.When carrying sampler, jump ring 56 is held rock core tightly, and breaks rock core by conical surface displacement last.Drill bit 68 is connected down on the screens pipe 63.

Regulate the process of pressure-keeping mechanism ball valve on the face of land: promptly the bottom 64 of pressure-keeping mechanism unloads in elder generation, rotate ball valve 56 with hand then, make the opening of ball valve just in time aim at basket 47, make ball valve 56 under the effect of torsion spring 60, produce pretightning force, then ball valve 56 is packed into basket 47 together with pressure-keeping mechanism integral body, just through hole in the ball valve 56 is penetrated basket 47.Locating part 62 and ball valve bottom 64 are installed then, and locating part 62 is two halfround bar slices, is attached on the pressurize cavity outer wall, and its effect is that restriction ball valve 56 flip angles are 90 degree.Be separated from the constraint of basket 47 when ball valve 56 after, ball valve 56 overturns under the effect of torsion spring power, just the process of broken strength.If not spacing, ball valve 56 just can not just in time make the non-hole face of ball valve 56 seal up the bottom of basket 47 after broken fully strength so.Therefore, on ball valve 56, be equipped with screens pin 57, when ball valve turn over turn 90 degrees after, the ledge of screens pin 57 just in time is stuck on the locating part 62, thereby ball valve 56 can not continue upset, turn 90 degrees and can only turn over, make the non-hole face of ball valve 56 seal up the bottom of basket 47, thereby realize the bottom pressurize.

Core-drilling: creep into the alcohol that needs in sampler, to pack into before coring, the dry ice of packing into, regulate pressure-keeping mechanism and regulate and hang differential attachment.

The alcohol of packing into: alcohol cavity 24 is installed, alcohol cavity piston 23 is installed in the alcohol cavity 24 near the upper ends of joints 22, then alcohol cavity 24 is installed on the piston cavity 18 by screw thread, the associated fasteners of valve body 28 and valve body 28 is installed then.Plug screw 26 on the alcohol cavity connector 27 is unloaded, alcohol is injected in the alcohol cavity 24 with the alcohol pump.After alcohol is full of, plug screw 26 is installed.

The dry ice of packing into prepares dry ice by the liquid carbon dioxide bottle.With the dry ice cavity down catcher 41 unload, in dry ice cavity pipe 37, take out cover 40 and insulation lower covers 39, pack into insulation loam cake 33, insulation lower cover 39 and dry ice of dry ice is incubated cylindrical dry ice storage silo between the bushing pipe 35.After filling finished, grip 40 and insulation lower cover 39 reinstalled dry ice cavity pipe 37, then dry ice cavity pipe 37 are connected to catcher 41 under the dry ice cavity.

Regulate pressure-keeping mechanism: ball valve bottom 64 is unloaded, and unload in the lump together with bucker 65.Rotate ball valve 56 then, make ball valve 56 under the effect of torsion spring 60, produce pretightning force, then through hole in the ball valve 56 is penetrated basket 47.And bottom 52 positions will be moved on the pressure-keeping mechanism.Locating part 62, ball valve bottom 64 and bucker 65 are installed afterwards.

Regulate to hang differential attachment: creep at every turn core finish sampler mentioned the face of land after, need to regulate and hang differential attachment to normally creeping into the state of coring.At first, promote sliding sleeve 5 downwards, make the annular groove of sliding sleeve 5 arrive steel ball 8 positions.Then, with steel ball 8 inside thrusters, the external surface that makes steel ball 8 is equal with the external surface of foreign side's six catchers 6.Afterwards, interior six sides catcher 7 upwards is pushed to rubber cushion 4 positions.At last, unclamp sliding sleeve 5, under the effect of sliding sleeve spring 10, sliding sleeve 5 is pushed to steel ball 8 in the interior annular grooving of interior six sides catcher 7 laterally.Inside and outside six sides' axial location is fixed, and axial relative motion can not take place between the two.Finish to regulate and hang differential attachment.

Hang differential attachment and core by inside and outside six sides' transmission drive outer tube 12 rotary drillings, and whole inner tube assembly and basket 47 do not turn round, rock core enters the pipe 48 that narrows.The power that feeds takes over 1 outside drilling rod passes to, pass to interior six sides catcher 7 then, passes to drill bit 68 broken hole bed rock stones through outer tube 12.Outer tube 12 and drill bit 68 bear axial compression, and inner tube assembly does not bear axial compression.Flushing liquor enters inner and outer pipe assembly annular gap through three side direction limberss of outer catcher 1, sliding sleeve 5 and outer six sides catcher 6, and at the bottom of drill bit 68 ostiums, and cutting carring flows to the face of land through borehole wall annular gap.

After rock core is full of the pipe 48 that narrows, earlier sampler is lifted from the bottom of the hole distance about 1m, the disconnected rock core of jump ring 67 cards.In drilling rod, drop into steel ball 3, turn on pump then on ground.Steel ball 3 drops on the sliding sleeve 5, changes the normal circulation canal of flushing liquor, and under the effect of flushing liquor pressure, sliding sleeve 5 moves down, and steel ball 8 enters in the inside grooving of sliding sleeve 5.Gravity by interior six sides catcher 7 moves inward steel ball 8, and inside and outside six sides are thrown off.Interior six sides catcher 7 moves down under the action of gravity of outer tube 12.Simultaneously, the pressurize chamber enclosure 54 that screens pipe 53 promotes in the pressure-keeping mechanism in the drive moves down 205mm, makes basket 47 lower ends ball valve 56 spheres upper end 30mm on earth.Because basket 47 has all broken away from ball valve 56, at this moment torsion spring torsion discharges, and torsion drives ball valve 56 upsets, because the position-limiting action of locating part 62, the ball valve flip angle is 90 degree, just seals up the basket bottom, reaches the effect of pressurize sealing.

Bottom pressurize: turn on pump, because steel ball 3 has stopped up the normal circulation direction of flushing liquor, under the effect of flushing liquor pressure, steel ball 3 promotes sliding sleeve 5 and moves down, sliding sleeve 5 moves down 24mm, make its inner annular groove arrive steel ball 8 positions (effect of steel ball 8 is that six square shafts realize promptly that to displacement inside and outside six square shafts are to the location inside and outside the restriction).At this moment, the gravity of interior six sides catcher 7 and outer tube 12 inwardly promotes steel ball 8.After steel ball 8 promotes to put in place, when steel ball 8 arrives sliding sleeve 5 annular groove roots, the no axial limiting of inside and outside six sides, six sides catcher 7 moves axially 205mm in the effect of outer tube 12 gravity downwards with respect to outer six sides catcher 6 in realizing.In the process that moves down, it is descending to promote pressure-keeping mechanism by last screens pipe 53, promptly promotes the ball valve 56 downward axially-movables in the pressure-keeping mechanism, and basket 47 is extracted out in the hole of ball valve 56; That is to say that basket 47 goes upward to the top of ball valve 56 relatively, ball valve 56 breaks away from the constraint of basket 47.At this moment ball valve overturns at the active force of torsion spring 60 pretension torsion.Because the position-limiting action of locating part 62, ball valve 56 can only turn over and turn 90 degrees, and makes the bottom of the complete circle face closure basket 47 of ball valve 56, reaches the effect of sealing rock core, realizes rock core bottom pressurize.

Upper end pressurize: under last pressurize spring 42 pretension effects, the basket internal pressure need reach 0.3MPa, and could to promote steel ball 43 up, the critical decomposition pressure of gas hydrates in the time of-20 ℃ is 0.3MPa, therefore must control basket 47 internal pressures below 0.3MPa, steel ball 43 is pressed on the draining valve body 44, makes gas hydrates decomposite gas and does not overflow and pressurize on realizing;

Freezing core: sliding sleeve 5 after continuing to come downwards to 35mm under the effect of flushing liquor pressure, six of outer six sides catcher 6 inside radially pod apertures expose, flushing liquor through this radially pod apertures enter axle 13 mesopores, and arrive piston 20.Flushing liquor and then promote piston 20 descending 40mm, three of piston cavity 18 inside radially pod apertures expose, flushing liquor through these three radially pod apertures enter to the alcohol cavity piston 23 of alcohol cavity 24 inside.Simultaneously, piston 20 drives in the time of descending that control lever 25 is descending, and it is descending that control lever drives valve body 28, and promptly valve body 28 is opened.Alcohol flows out in alcohol cavity 24.After flushing liquor arrives alcohol cavity piston 23, it is descending to promote alcohol cavity piston 23 under the continuation effect of its pressure, normal temperature alcohol is extruded in alcohol cavity 24, normal temperature alcohol is through alcohol cavity connector 27, valve body 28, three axial passages on catcher 31 tops enter alcohol ascending pipe 36 on the dry ice cavity, is re-introduced between insulation loam cake 33, insulation lower cover 39 and the dry ice insulation bushing pipe 35 in the middle part of the dry ice storage silo.The heat absorption that distils fast of normal temperature alcohol catalysis dry ice makes normal temperature alcohol become low temperature alcohol.Low temperature alcohol is through five axial passages of 39 of insulation lower cover, through overlap 40 and the dry ice cavity down seven inclined holes on the catcher 41 enter in the cavity of formation between the catcher 41 dry ice cavity under, basket 47, rubber cushion 50 and the insulation bushing pipe 46, surround basket 47, thereby realize the hole-bottom frozen rock core by low temperature alcohol.Water in the basket 47 can be managed the outer ring-like gap in draining valve body 44 flows into, the gas that dry ice sublimation produces is expelled to the inner and outer pipes annular gap through one-way exhaust valve 32.

Alcohol all is pressed into to the dry ice layer under the effect of flushing of hydraulic power, alcohol cavity 24 pressure inside continue to increase, when pressure reaches 2.0MPa, flushing liquor arrives steel ball 19 through the discharge orifice of piston cavity 18, and then promote to move on the steel ball 19, flushing liquor flow to the inner and outer pipes annular gap through three current by pass of piston cavity 18, realizes the normal circulation of flushing.At this moment, the pressure stability of face of land water pump is to 2.0MPa.Show that alcohol all has been injected into the dry ice layer, illustrate that the freezing core process finishes substantially, can carry brill this moment.

The face of land obtains rock core fast: behind hole-bottom frozen 5-10min, sampler is proposed to the face of land, in last screens pipe 53 and reamer 49 junctions, will go up screens pipe 53 and together unload together with pressure-keeping mechanism and drill bit 68.Unload clip spring seat 66 and jump ring 67, the pipe 48 that will narrow is together extracted out in basket 47 together with core sample, and pipe 48 two ends that will narrow seal with plug, and preserve with nitrogen storage tank or high-pressure bottle in the lump together with core sample.

Sampler is mentioned the face of land after finishing creeping into to core at every turn, unloading lower outer pipe 12, and unload in the lump together with pressure-keeping mechanism and drill bit 68, tube connector 29 under the unloading then, and unload in the lump together with freezing mechanism.And then remove valve body 28, and unload alcohol cavity 24, and alcohol cavity piston 23 is unloaded, at last the flushing liquor in the alcohol cavity 24 is cleaned up.Also need under dry ice cavity pipe 37 and dry ice cavity, to take over 41 places and dismantle, alcohol is poured out in dry ice storage silo and basket 47 outer ring-like spaces.

Embodiment 2

Hang differential attachment: take over 1 outward and be threaded with top rod, outer catcher 1 is threaded with outer six sides catcher 6, between outer six sides catcher 6 takes over 7 with interior six sides by inside and outside six side's transmissions, in six sides take over 7 and be threaded with outer tube 12, interstage sleeve 2 is threaded with outer six sides catcher 6 by screw, and interstage sleeve 2 restriction sliding sleeves 5 outwards do not slide.Sliding sleeve 5 is slidingly matched with outer six sides catcher 6, packing ring 11 is sitting on the step of outer six sides catcher, 6 internal holes, 10 precompressed of sliding sleeve spring are installed, two ends are supported by packing ring 11 and sliding sleeve 5 respectively up and down, steel ball 8 is contained in the ball cover 9, ball cover 9 outsides are the conical surface, prevent that steel ball 8 from outwards sliding, steel ball 8 has 12, ball cover 9 is installed outside in the radial hole of six end faces of six sides catcher 6 respectively, ball cover 9 closely cooperates with outer six sides catcher 6, in cavity axial distance between six sides catcher 7 and the outer six sides catcher 6 be 210mm, therefore in six sides catcher, 6 distance limit that move down be 210mm, this is apart from guaranteeing that interior six sides take over 7 and move downward to the lower end of basket 47 together with outer tube 12 and drill bit 68 promotion pressure-keeping mechanism ball valves 56, make ball valve 56 be separated from the constraint of basket 47, thereby realize ball valve 56 upset back seal rock core barrels 47.

When the external surface of sliding sleeve 5 lower ends is provided with endless groove, can realize freezing core and pressurize rock core function, when the external surface of sliding sleeve 5 does not have endless groove, can only realize simple freezing core function.The power that feeds takes over 1 outside drilling rod passes to, pass to outer tube 12 through interior six sides catcher 7, finally is passed to drill bit 68 fractured rocks.Turning power takes over 1 outside drilling rod is passed to, take over 1 outward and transmit rotary torque to outer six sides catcher 6, transmits rotary torque through inside and outside six sides, and turning power is passed to interior six sides catcher 7, and rotary torque is passed to drill bit 68 fractured rocks through outer tube 12.Realize inside and outside six square shafts to the location by steel ball 8, thereby realize the hanging function between the inside and outside six sides catcher.Between the inside and outside six sides catcher two Φ, 12 steel balls 8 are set respectively on its six end face directions, steel ball 8 amounts to 12.One side seat of steel ball 8 is in the annular awl groove of interior six sides catcher 7, and the other end is installed in the ball cover 9.Sliding sleeve 5 is under the pretightning force effect of sliding sleeve spring 10, and the complete outer round surface of its lower end contacts with steel ball 8 all the time, so steel ball 8 can not move to the inside, and is spacing in realizing.Stretch out in the annular awl groove that enters interior six sides catcher 7 in the outside of steel ball, therefore can move laterally.Inside and outside two of steel ball 8 all has spacingly, so steel ball 8 can be to two side shiftings, thereby realizes the axial hanging function of inside and outside six sides between taking over.Because outside steel ball enters the interior 5mm of the annular grooving of interior six sides catcher 7, realizes inside and outside six sides' axial limiting, no axial relative motion between six sides inside and outside so just guaranteeing, six sides' hanging function in realizing.When creeping into a round trip, after rock core is full of basket, in sampler, drop into steel ball 3 from the face of land through the drilling rod internal channel, owing to stop up flushing liquor normal circulation passage, under the effect of flushing liquor pressure, sliding sleeve 5 moves down 24mm, make the ring-type grooving of sliding sleeve 5 lower ends all arrive steel ball 8 places, under the action of gravity of interior six sides catcher 7 and outer tube 12, also the circular cone owing to interior six sides catcher 7 contacts with steel ball 8, thereby promote steel ball 8 and move the interior spacing disappearance of steel ball 8 so to the inside.There is not axial limiting between inside and outside six sides, under the effect of outer tube 12 gravity, interior six sides catcher 7 moves down, and displacement is limited in 210mm, can guarantee that in distance basket 47 bottom relative displacements to apart from pressure-keeping mechanism ball valve 56 sphere 30mm, guarantee ball valve 56 accessible closing under twisting force.If the external surface of sliding sleeve 5 all adopts smooth disc structure, sliding sleeve 5 is in the process that flushing liquor pressure moves down so, its external surface limits moving of steel ball 8 all the time, it is spacing in steel ball 8 exists all the time, just do not have differential function between the inside and outside like this six sides catcher, thereby can not realize the pressure holding function of sampler.And can only realize the freezing function of sampler.After sliding sleeve 5 moves down 35mm, 6 of outer six sides catcher 6 radially pod apertures expose, flushing liquor enters through this passage, and then realizes follow-up alcohol function of injecting and freezing function.

Single action mechanism: be threaded between outer six sides catcher 6 and the axle 13, axle 13 and take over 14 between pass through bearings.The catcher 14 with piston cavity 18 between be threaded.Outer six sides catcher 6 drives axle 13 revolutions, under the effect of thrust ball bearing, realizes inner and outer pipes assembly transfer function, i.e. the single action function.When drive sampling is turned round, take over 1 outward, outer six sides catcher 6, axle 13 revolutions, catcher 14 does not turn round.Be connected with the bottom inner tube assembly and take over 14, thereby realize that inner tube assembly does not turn round.

Controlling organization: the upper end of control lever 25 and control piston 20 are fixed by round nut, and joint 22 relies on and is threadedly connected to piston cavity 18 bottoms.Control piston spring 21 belongs to the compression spring, and precompressed is installed in the piston cavity 18, and it is supported by piston 20 and joint 22 at two ends up and down, and it is upper to guarantee that piston 20 is under the effect of spring force all the time.Piston 20 is slidingly matched with piston cavity 18.

Alcohol cavity 24 is threaded with piston cavity 18, the Internal and external cycle of alcohol cavity piston 23 respectively and 25 of alcohol cavity 24 and control levers with the contact seal of O RunddichtringO.Spilling smart cavity 24 is threaded with alcohol cavity connector 27.Valve body 28 is connected with control lever 25 by screw thread, and valve body 28 adopts the conical surface and O RunddichtringO and 27 sealings of alcohol cavity connector, compresses by nut, prevents that alcohol from overflowing.Alcohol cavity connector 27 sides are provided with plug screw 26, back out plug screw 26 when alcohol is installed, and alcohol is in this hole enters to alcohol cavity 24.Control lever 25 upper ends are connected with piston 20, through joint 22 mesopores, pass alcohol cavity piston 23 interstitial holes, alcohol cavity connector 27 interstitial holes, and finally its lower end is connected with valve body 28.Mobile drive control lever 25 and valve body 28 by piston 20 move.Tube connector 30 is threaded with alcohol cavity connector 27, adopts rubber cushion 30 to compress sealing between the two.Piston cavity 18 upper ends are provided with plug 16, and plug 16 is threaded with piston cavity 18, and 17 precompressed of earial drainage spring are installed respectively in three discharge orifices, and it is supported by plug 16 and steel ball 19 respectively at two ends up and down.Alcohol is stored in the alcohol cavity 24 between alcohol cavity piston 23 and the valve body 28 in advance.Flushing liquor is after single action mechanism flows into controlling organization, and it is descending to promote piston 20, and it is descending to drive control lever 25, and when they descending 15mm, valve body 28 is opened, and valve body 28 breaks away from alcohol cavity connector 27, and alcohol relies on deadweight to flow out.Because shaft bottom head of liquid, alcohol can't all rely on from reentering the dry ice layer, must adopt the mode that is pressed into to make alcohol be pressed into the dry ice layer.Therefore, design alcohol cavity piston 23, when piston 20 continues descending 25mm, be that Bottom Runby is when reaching 40mm, three of piston cavity 18 radially pod apertures open, flushing liquor flow to alcohol cavity piston 23 through this, because the Internal and external cycle of alcohol cavity piston 23 is used O RunddichtringO and supporting surface contact seal respectively, alcohol cavity piston 23 extrudes alcohol to lower slider in alcohol cavity 24 under the effect of flushing of hydraulic power, be injected into the dry ice layer, guarantee that alcohol can not overflow because of piston moves down upwards.When alcohol all extruded from alcohol cavity 24, alcohol cavity piston 23 came downwards to alcohol cavity connector 27, and flushing liquor is full of the cavity between piston cavity 18 and the alcohol cavity connector 27.At this moment, the pressure of flushing liquor continues to increase, and when increasing to 2MPa, flushing liquor flow to steel ball 19 through three discharge orifices, and earial drainage spring 17 is opened, and flushing liquor flows out through three delivery ports in piston cavity 18 outsides, reaches the release purpose.This moment, the surface water pump pressure can return to normal pressure value from big force value, showed that alcohol all extrudes.Promptly know promptly by observing water-aspirator pressure whether alcohol all is injected into the dry ice layer on the face of land.

Freezing mechanism: tube connector 29 is connected with catcher 31 on the dry ice cavity by screw thread, adopts rubber cushion 30 to compress sealing between the two; Catcher 31 is threaded with dry ice cavity pipe 37 on the dry ice cavity, catcher 31 is by being threaded on one-way exhaust valve 42 and the dry ice cavity, 31 of catchers closely cooperate on alcohol ascending pipe 36 and the dry ice cavity, and dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Catcher 31 quiet contacts on insulation loam cake 33 and the dry ice cavity, insulation loam cake 33 and dry ice cavity pipe 37 matched in clearance.Dry ice insulation bushing pipe 35 and insulation loam cake 33 quiet contacts, muff 34 and dry ice cavity pipe 37 matched in clearance, muff 34 and 35 of dry ice insulation bushing pipes are gluing connecing, in the ring cavity of dry ice insulation layer 38 between dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and muff 34, dry ice insulation layer 38 is quiet the contact with dry ice insulation bushing pipe 35, dry ice cavity pipe 37 and 34 of muffs.Insulation lower cover 39 is quiet the contact with 34 of dry ice insulation bushing pipe 35 and muffs.Insulation lower cover 39 and dry ice cavity pipe 37 matched in clearance.Cylindrical space between insulation loam cake 33, insulation lower cover 39 and the dry ice insulation bushing pipe 35 is the dry ice storage silo.Cover 40 is quiet the contact with 39 of insulation lower covers, and cover 40 and dry ice cavity pipe 37 matched in clearance, cover 40 are taken over 41 down with the dry ice cavity and be quiet the contact.Dress is during dry ice, with the dry ice cavity down catcher 41 unload, in dry ice cavity pipe 37, take out cover 40 and insulation lower covers 39, with the dry ice dry ice storage silo of packing into.Dry ice cavity pipe 37 is taken over 41 down with the dry ice cavity and is threaded.Dry ice cavity down catcher 41 is threaded with basket 47 and bushing pipe 45, and bottom 63 is connected with bushing pipe 45 by screw thread, seal with O ring between bottom 63 and the basket 47.Rubber cushion 61 and bottom muff 62 compress by bottom 63 and bushing pipe 45 and basket 47, and insulation bushing pipe 57 and dry ice cavity catcher 41 down are quiet the contact with rubber cushion 61, insulation bushing pipe 57 and bushing pipe 45 matched in clearance.The dry ice cavity down annulus of 50 of catcher 41, basket 47, insulation bushing pipe 46 and rubber cushions is the storage area that alcohol is injected into the low temperature alcohol that the dry ice storage silo forms.Draining valve body 55 is taken over 41 down by screw thread and dry ice cavity and is connected, last pressurize spring 64 precompressed are installed, the lower end is supported by steel ball 65, the upper end is by catcher 41 supports down of dry ice cavity, basket 47 is connected with clip spring seat 66 by screw thread, and clip spring seat 66 contacts with jump ring 67 conical surfaces, and pipe 59 and basket 47 matched in clearance narrow, pipe 58 upper ends and dry ice cavity catcher 41 quiet contacts the down that narrow, pipe 58 lower ends that narrow are by steps supports in the clip spring seat 66;

For improving dry ice, adopt three layers of cold insulation structure at down-hole cold insulation dry ice in the holding time of down-hole.Outside the dry ice storage silo, be with three layers of cold insulation structure, be respectively from the inside to the outside: hard polyaminoester dry ice insulation bushing pipe 35, foamed polyurethane dry ice insulation layer 38 and insulation lacquer.Simultaneously, being respectively equipped with material at the two ends up and down of dry ice storage silo is the insulation loam cake 33 and the insulation lower cover 39 of hard polyaminoester, with the holding time of further raising dry ice in the down-hole.

For strengthening the thermal conductivity of basket 47, its material adopts brass material.There is kerve on its surface, promptly adopts the cold face temperature etc. structure.

Obtain rock core fast for being implemented in the face of land, the pipe 48 that narrows is set.After sampler extracts the face of land, needn't unload heavy outer tube 12, and only need to unload the screens pipe at last screens pipe 53 and reamer 49 junctions, and unload in the lump together with pressure-keeping mechanism and drill bit 68, unload clip spring seat 66 and jump ring 67, the pipe 48 that can will narrow is extracted out in basket 47 in the lump fast together with core sample, thereby reduces the soil surface treatment time of staying of hydrate rock core, further improves rock core fidelity degree.

Pressure-keeping mechanism: be threaded between reamer 49 and the outer tube 12, last screens pipe 53 is threaded with 49 of reamers, and the axial distance that the interior ledge of last screens pipe 53 and pressurize chamber enclosure are 54 is 10mm.Last screens pipe 53 is threaded with following screens pipe 63, and following screens pipe 63 is threaded with drill bit 68.Pressurize chamber enclosure 54 is connected with dry ice bushing pipe bottom 41 nothings.Pressurize chamber enclosure 54 is threaded with ball valve bottom 64, and ball valve bottom 64 is threaded with bucker 65, and joint ring 55 compresses ball valve 56, and joint ring 55 is sitting on the pressurize chamber enclosure 54 and closely cooperates, and pressurize chamber ball valve 56 is threaded with screens pin 57.Ball valve 56 is connected by flat key 58 with ball valve axle 59.The other end seat of ball valve axle 59 is in adjusting nut 61.Torsion spring 60 is enclosed within on the ball valve axle 59, and torsion spring 60 1 ends and ball valve 56 are fixing, and the other end is connected with adjusting nut 61.Adjusting nut 61 is threaded with pressurize chamber enclosure 54.Locating part 62 is contained in the annulus of 56 of pressurize chamber enclosure 54 and ball valves.Clip spring seat 55 is connected with basket 47 by screw thread, and jump ring 56 has male cone (strobilus masculinus), and clip spring seat 55 has inner conical surface, and jump ring 56 is by the conical surface and clip spring seat 55 cone match.When carrying sampler, jump ring 56 is held rock core tightly, and breaks rock core by conical surface displacement last.Drill bit 68 is connected down on the screens pipe 63.

Core-drilling is with embodiment 1, and just the hole-bottom frozen time is 10 minutes, and other are identical, are not repeated.

Claims (10)

1, a kind of dry ice sublimation hole bottom refrigerating and pressure keeping sampler, it is characterized in that, outer catcher (1) is threaded with top rod, outer catcher (1) is taken over (6) by screw thread with outer six sides and is connected, interstage sleeve (2) is taken over (6) by screw with outer six sides and is threaded, sliding sleeve (5) and outer six sides catcher (6) matched in clearance, interstage sleeve (2) restriction sliding sleeve (5) does not outwards slide, interior six sides catchers (7) are threaded with outer tube (12), turn round transmissions by six faceted pebbles between outer six sides catchers (6) and interior six sides catchers (7), drilling rod passes to outer six sides catchers (6) with turning power, by six faceted pebbles turning power is passed to interior six sides catchers (7), interior six sides catchers (7) pass to turning power outer tube (12) again, radial direction is equipped with ball cover (9) on six faceted pebbles of interior six sides catchers (7), ball cover (9) outside is the conical surface, two steel balls (8) are housed in each ball cover (9), ball cover (9) closely cooperates with outer six sides catchers (6), sliding sleeve spring (10) upper end is supported through interstage sleeve (2) by sliding sleeve (5), sliding sleeve spring (10) lower end is sitting on the step of outer six sides catcher (6) endoporus by packing ring (11), be provided with axial hollow apart from 200mm-210mm between interior six sides catchers (7) and the outer six sides catchers (6), the distance that six sides catchers (6) move down in the restriction, interior six sides catchers (7) move downward to the lower end of basket (47) together with outer tube (12) and drill bit (68) promotion ball valve (56), make ball valve (56) be separated from the constraint of basket (47), make ball valve (56) upset back seal rock core barrel (47);

Outer six sides catchers (6) are connected with axle (13) by screw thread, single action between axle (13) and the catcher (14) realizes by bearing, axle (13) revolution, do not turn round and take over (14), axle (13) is connected with catcher (14) by packing ring (15), and catcher (14) is connected with piston cavity (18) by screw thread; Piston cavity (18) upper end is provided with plug (16), plug (16) is connected with piston cavity (18) by screw thread, earial drainage spring (17) precompressed is installed in the current by pass, its upper end is supported by plug (16), the lower end is supported by steel ball (19), piston cavity (18) bottom is connected with joint (22) by screw thread, piston spring (21) precompressed is installed in the piston cavity (18), its upper end is supported by piston (20), the lower end is supported by joint (22), control lever (25) is sleeved in the cavity of piston spring (21), guarantee that piston (20) is in upper all the time under spring action, the upper end of control lever (25) is connected by nut with piston (20), the lower end is connected with valve body (28), piston (20) is slidingly matched with piston cavity (18), piston (20) drives control lever (25) and valve body (28) moves, valve body (28) is connected with control lever (25) by screw thread, piston cavity (18) is connected with alcohol cavity (24) by screw thread, the Internal and external cycle of alcohol cavity piston (23) seals with the O RunddichtringO respectively and between alcohol cavity (24) and control lever (25), spilling smart cavity (24) is connected with alcohol cavity connector (27) by screw thread, valve body (28) adopts the conical surface and O RunddichtringO and alcohol cavity connector (27) sealing, and compress by nut, alcohol cavity connector (27) side is provided with plug screw (26), back out plug screw (26) during dress alcohol, alcohol enters alcohol cavity (24) thus, tube connector (29) is connected with alcohol cavity connector (27) by screw thread, adopts rubber cushion (30) to compress sealing between the two;

Tube connector (29) is connected with catcher (31) on the dry ice cavity by screw thread, adopts rubber cushion (30) to compress sealing between the two; Catcher (31) is threaded with dry ice cavity pipe (37) on the dry ice cavity, catcher (31) is by being threaded on one-way exhaust valve (42) and the dry ice cavity, closely cooperate between catcher (31) on alcohol ascending pipe (36) and the dry ice cavity, dry ice cavity pipe (37) is taken over (41) down with the dry ice cavity and is threaded, (31) are quiet contacts for catcher on insulation loam cake (33) and the dry ice cavity, insulation loam cake (33) and dry ice cavity pipe (37) matched in clearance.Dry ice insulation bushing pipe (35) and quiet contact of insulation loam cake (33), muff (34) and dry ice cavity pipe (37) matched in clearance, be gluing connecing between muff (34) and dry ice insulation bushing pipe (35), in the ring cavity of dry ice insulation layer (38) between dry ice insulation bushing pipe (35), dry ice cavity pipe (37) and muff (34), being quiet the contact between the insulation of dry ice insulation layer (38) and dry ice bushing pipe (35), dry ice cavity pipe (37) and muff (34), is quiet the contact between insulation lower cover (39) and dry ice insulation bushing pipe (35) and muff (34).Insulation lower cover (39) and dry ice cavity pipe (37) matched in clearance.Cylindrical space between insulation loam cake (33), insulation lower cover (39) and the dry ice insulation bushing pipe (35) is the dry ice storage silo, cover (40) is quiet the contact with being incubated between lower cover (39), cover (40) and dry ice cavity pipe (37) matched in clearance, cover (40) is quiet the contact down with the dry ice cavity between catcher (41), during dress dry ice, with the dry ice cavity down catcher (41) unload, in dry ice cavity pipe (37), take out cover (40) and be incubated lower cover (39), with the dry ice dry ice storage silo of packing into.Dry ice cavity pipe (37) is taken over (41) down with the dry ice cavity and is threaded, dry ice cavity catcher (41) down is threaded with basket (47) and bushing pipe (45), bottom (63) is connected with bushing pipe (45) by screw thread, seal with O ring between bottom (63) and the basket (47), rubber cushion (61) and bottom muff (62) compress by bottom (63) and bushing pipe (45) and basket (47), it is quiet the contact with rubber cushion (61) that insulation bushing pipe (57) is taken over (41) down with the dry ice cavity, insulation bushing pipe (57) and bushing pipe (45) matched in clearance, the dry ice cavity is catcher (41) down, basket (47), annulus between insulation bushing pipe (46) and rubber cushion (50) is the storage area that alcohol is injected into the low temperature alcohol of dry ice storage silo formation, draining valve body (55) is taken over (41) down by screw thread and dry ice cavity and is connected, last pressurize spring (64) precompressed is installed, the lower end is supported by steel ball (65), the upper end is by catcher (41) support down of dry ice cavity, basket (47) is connected with clip spring seat (66) by screw thread, clip spring seat (66) contacts with jump ring (67) conical surface, pipe (59) and basket (47) matched in clearance narrow, narrow pipe (58) upper end and dry ice cavity down catcher (41) are quiet contacts, the interior step support of clip spring seat (66) is passed through in pipe (58) lower end that narrows; Reamer (60) is connected with outer tube (12) by screw thread, last screens pipe (53) is connected with reamer (60) by screw thread, axial distance between the interior ledge of last screens pipe (53) and pressurize chamber enclosure (54) is 5-10mm, last screens pipe (53) is connected with following screens pipe (63) by screw thread, following screens pipe (63) is connected with drill bit (68) by screw thread, the quiet contact between pressurize chamber enclosure (54) and bottom (52), pressurize chamber enclosure (54) is connected with ball valve bottom (64) by screw thread, ball valve bottom (64) is connected with bucker (65) by screw thread, joint ring (55) compresses ball valve (56), joint ring (55) is sitting on the pressurize chamber enclosure (54) and closely cooperates, pressurize chamber ball valve (56) is connected with screens pin (57) by screw thread, one end of ball valve axle (59) is connected with ball valve (56) by flat key (58), the other end seat of ball valve axle (59) is in screw pitch nut (61), torsion spring (60) is enclosed within on the ball valve axle (59), torsion spring (60) one ends and ball valve (56) are fixing, the other end and adjusting nut (61) are fixing, adjusting nut (61) is connected with pressurize chamber enclosure (54) by screw thread, in the annulus of locating part (62) between pressurize chamber enclosure (54) and ball valve (56), clip spring seat (66) is connected with basket (47) by screw thread, jump ring (67) has male cone (strobilus masculinus), clip spring seat (66) has inner conical surface, jump ring (67) is connected by the conical surface and clip spring seat (66), last when carrying sampler, jump ring (67) is held rock core tightly, and break rock core by conical surface displacement, drill bit (68) is connected down on the screens pipe (63).

2, according to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that the external surface of sliding sleeve (5) lower end is provided with endless groove, can freezing core can also the pressurize rock core, when the external surface of sliding sleeve (5) does not have endless groove, can only realize freezing core and can not the rock core pressurize.

3, according to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that, all respectively be provided with at least one radially flow channels on six end faces in the outer six sides catchers (6).

According to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that 4, piston cavity (18) inside is provided with three radially flow channels.

According to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that 5, piston cavity (18) inside is provided with three radial drainage passages.

According to freezing pressure keeping sampler at the bottom of the cold hole of the described dry ice sublimation of claim 1, it is characterized in that 6, catcher (31) top is provided with three axially extending bores on the dry ice cavity, dry ice cavity catcher (41) top down is provided with seven inclined holes.

7, according to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that, adopt three layers of cold insulation structure to preserve dry ice in the down-hole, promptly hard polyaminoester dry ice insulation bushing pipe (35), foamed polyurethane dry ice insulation layer (38) and insulation are coated with lacquer respectively from the inside to the outside.

According to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampler of claim 1, it is characterized in that 8, basket (47) adopts the cold face temperature etc. structure.

9, according to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampling method of claim 1, it is characterized in that, comprise following order and step:

A, when round trip end of a period rock core is full of basket, drilling rod is carried in termination of pumping, makes sampler lift from about one meter distance at the bottom of the hole;

B, in drilling rod, drop into steel ball (3) on the face of land, steel ball (3) drops on the sliding sleeve (5), turn on pump, it is descending that steel ball (3) promotes sliding sleeve (5), make its inner annular groove arrive steel ball (8) position, in six sides catcher (7) promote ball valve (56) together with outer tube (12) and drill bit (68) and move downward to the lower end of basket (47), make ball valve (56) be separated from the constraint of basket (47), seal rock core barrel (47) after ball valve (56) overturns;

C, pressurize rock core: at first bottom pressurize, seal rock core barrel (47) after both ball valve (56) had overturn, realize the bottom pressurize, upper end pressurize then, under last pressurize spring (42) pretension effect, basket (47) internal pressure is controlled at below the 0.3MPa, and steel ball (43) is pressed on the draining valve body (44), gas is not overflowed and pressurize on realizing;

D, freezing core: when sliding sleeve (5) comes downwards to six radial passages of outer six sides catchers (6), flushing liquor is through these six radial passages, through outer six sides catchers (6), axle (13) mesopore arrives piston (20), piston (20) comes downwards to three radial passages of piston cavity (18), flushing liquor is through these three radial passages, arrive alcohol cavity piston (23) through piston cavity (18), piston cavity (18) is descending, after normal temperature alcohol extruded from alcohol cavity (24), through alcohol cavity connector (27), valve body (28), three axial passages on catcher (31) top enter alcohol ascending pipe (36) on the dry ice cavity, be re-introduced into insulation loam cake (33), dry ice storage silo middle part between insulation lower cover (39) and the dry ice insulation bushing pipe (35), the heat absorption that distils fast of normal temperature alcohol catalysis dry ice, make normal temperature alcohol become low temperature alcohol, low temperature alcohol is through five axial passages of (39) of insulation lower cover, seven inclined holes on catcher (41) under cover (40) and the dry ice cavity enter catcher (41) under the dry ice cavity, basket (47), in the ring cavity that forms between rubber cushion (50) and the insulation bushing pipe (46), thereby realize the hole-bottom frozen rock core by low temperature alcohol;

E, sampler is proposed to the face of land at hole-bottom frozen 5-10 minute;

F, will go up screens pipe (53) in the junction of last screens pipe (53) and reamer (49) and together unload, unload clip spring seat (66) and jump ring (67) together with drill bit (68);

G, the pipe (48) that will narrow are together extracted out in basket (47) together with core sample;

H, pipe (48) two ends that will narrow seal with plug, and core sample is preserved with nitrogen storage tank or high-pressure bottle together with the pipe (48) that narrows.

10, according to the described dry ice sublimation hole bottom refrigerating and pressure keeping sampling method of claim 9, it is characterized in that adopting dry ice is refrigerant, alcohol by dry ice sublimation absorption refrigeration alcohol at the bottom of the hole, and utilizes low temperature alcohol at the hole-bottom frozen rock core for helping cold catalyzer and refrigerating medium.

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