CN201835777U - Hole bottom freezing rope core drill - Google Patents
Hole bottom freezing rope core drill Download PDFInfo
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- CN201835777U CN201835777U CN2010202047194U CN201020204719U CN201835777U CN 201835777 U CN201835777 U CN 201835777U CN 2010202047194 U CN2010202047194 U CN 2010202047194U CN 201020204719 U CN201020204719 U CN 201020204719U CN 201835777 U CN201835777 U CN 201835777U
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Abstract
The utility model relates to a hole bottom freezing rope core drill. Liquid nitrogen is taken as a refrigerant and freezs a well core at a hole bottom through heat aborption due to gasfication to restrain the decomposition of a natural gas hydrate. The dill comprises an outer tube assembly and an inner tube assembly. The inner tube assembly is fished from the outer tube assembly through a fisher during the well core obtaining process; an end cover and a clamp spring seat are disassembled to draw out a semi-closed tube and a well core sample from a well core tube; two ends of the semi-closed tube are sealed by rubber stoppers; the well core sample and the semi-closed tube are preserved by a liquid nitrogen storage tank or a high-pressure container, so that quick freezing is realized, thereby ensuring good freezing effect; rope coring is combined with hole bottom freezing to realize quick coring without hoisting the drill; because the inner tube assembly does not rotate during the drilling, the damage caused by mechanical force generated by the rotation of the drill to the hydrate well core is avoided to a greater degree, so that the well core recovery rate, the integrity and the representativeness are more effectively improved, and the earth surface sampling is quickly carried out in a semi-closed manner to quickly obtain the well core from an earth surface.
Description
Technical field:
The utility model relates to a kind of wire line coring drilling tools, drills the drilling tools that hole-bottom frozen is cored in particular for gas hydrates.
Background technology:
Along with rapid development of economy, conventional energy resources such as coal, oil, natural gas can not satisfy the demand of human development, and gas hydrates are with its abundant reserves, and the alternative energy source that will become conventional energy resources such as coal, oil, natural gas in future is also known together by the mankind.
Gas hydrates form and compose and exist under the environment of high pressure low temperature.According to gas hydrates stabilizing voltage characteristic curve,, will cause gas hydrates to decompose if temperature or pressure conditions change surpass equilibrium conditions.How to obtain the gas hydrates sample of high-fidelity, work has proposed very high requirement to core drilling.Present gas hydrates sampler both domestic and external is mainly by two kinds of mentalities of designing: a kind of is pressure keeping sampler at the bottom of the hole, and a kind of is hole-bottom frozen sampler.The thinking of pressure keeping sampler is after the hydrate rock core enters the pressurize basket at the bottom of the hole, closing the basket bottom by ball valve makes rock core keep initial pressure, and utilize the pressure compensator controlled pressure, keep rock core pressure and in putting forward the process of brill, remain unchanged, again rock core is carried out freezing preservation after mentioning the face of land.This thinking is high especially for the intensity and the sealing requirements of ball valve, in case ball valve sealing decline will cause decomposition of hydrate, and the failure of coring.The thinking of hole-bottom frozen sampler is to finish when creeping into round trip, after the hydrate rock core is full of basket, utilize flushing liquor pressure refrigerant to be pressed into the freezing inside cavity that seals around the basket, refrigerant and hydrate rock core are by copper basket generation interchange of heat, and realization is freezing to the hydrate rock core.According to gas hydrates temperature and pressure characteristic curve, its decomposition pressure reduces along with the reduction of temperature.If can be freezing to-45 degrees centigrade, even pressure, can guarantee also that the hydrate rock core does not decompose less than an atmospheric pressure the gas hydrates rock core.
What existing hole-bottom frozen Sampling driller adopted is that dry ice is as refrigerant, alcohol is as refrigerating medium, and putting forward the brill formula for pitching cores, its deficiency is: complex structure, because dry ice is solid-state, need to adopt alcohol as refrigerating medium, after elder generation becomes low temperature alcohol with the dry ice reaction, it is freezing to inject the interior realization of freezing chamber, and this just makes sampler structure complicated more; Cold eastern efficient is low, and weak effect owing to must adopt alcohol as refrigerating medium, has a big chunk cold to be taken away by alcohol, can not realize making full use of of refrigerant cold; Carry for pitching and to drill through the heart,, in sampler, drops into steel ball by drilling rod and change the flushing liquor circulation road, with the control of realization to refrigerating process creeping into after round trip finishes.This can only adopt the method for carrying brill to obtain rock core after having determined round trip to finish, and it is long to carry the brill time, and workload is big.And in putting forward the brill process, the hydrate rock core can produce secondary and decompose.
Summary of the invention:
The purpose of this utility model just is at above-mentioned the deficiencies in the prior art, providing a kind of is to reduce the hydrate core temperature with liquid nitrogen at the bottom of the hole to suppress the gas hydrates decomposition, is applicable to the hole bottom freezing cord coring drill of land frozen soil layer gas hydrates drill sampling.
The purpose of this utility model is achieved through the following technical solutions:
As refrigerant, at the hole-bottom frozen rock core, suppress the decomposition of gas hydrates with liquid nitrogen by the liquid nitrogen gasification heat absorption.
Liquid nitrogen gasification type gas hydrate hole-bottom frozen rope sampler comprises outer pipe assembly and inner tube assembly.When obtaining rock core,, inner tube assembly is salvaged from outer pipe assembly with fisher by the method for wire line coring.
Inner tube assembly comprises: spearhead 1 is hinged by the pin 5 and the axis of cone 4, locking ball 3 and retainer spring 2 are installed between the spearhead 1 and the axis of cone 3, the axis of cone 4 employing hollow pin I8 are nested in to carry and draw sleeve 6 tops, carry and draw sleeve 6 and to play deck 9 concentric, and be matched in clearance, carry and draw sleeve 6 and slide vertically, hollow pin II10 passes the cotter slot that plays deck, the two ends rivet clasp draws on the sleeve wall carrying, play the move distance of the cotter slot of deck 9 by restriction hollow pin 10, the move distance vertically that draws sleeve 6 is carried in restriction, bullet card 15 adopts rivet 16 to form hinge type bullet fastening position mechanism with hinge 11, the fixed end of bullet card 15 is fixed on by hollow pin III13 and plays on the deck 9, playing deck 9 is connected with main shaft 22 by rivet 14, hanging ring 18 is installed in shoulder screw thread place, main shaft 22 top by screw thread, adopt retaining nut 19 to tighten up, main shaft 22 is a hollow structure, main shaft 22 top sidewalls are provided with the inclined hole I20 of 4 Φ 19, inclined hole I20 center line and main-shaft axis 22 angles at 45, main shaft 22 sidewalls of seat ring 21 bottoms are provided with the inclined hole II23 of 4 Φ 19, inclined hole II23 center line and main-shaft axis angle at 45, inclined hole I20 and inclined hole II23 are all circumferentially uniform along spindle outer wall, hollow mandrel 27 is connected with main shaft 22 bottoms by screw thread, and with tightening up round nut 28 lockings, axle cover 30 is a matched in clearance with hollow mandrel 27, it is thrust bearing 31 that axle is overlapped 30 upper ends, the lower end is a thrust bearing 32, thrust bearing 31 is seated at bearing door 29 inside, thrust bearing 32 is compressed by buffer spring 33, adopts back-up ring 34 and nut 35 that spring is fixed then;
Connection short tube 36 upper ends are overlapped 30 external screw threads by internal thread and axle and are connected, the lower end is connected with control joint 37 external screw threads by internal thread, hollow mandrel 27 lower ends will be inserted in control joint 37 upper holes, between be matched in clearance, control piston 38 is seated in the control joint 37 center piston passages, control spring 39 is pressed in control piston 38 bottoms, catch 45 compresses control spring, with holding screw catch 45 is fixed on the control joint 37, earial drainage spring 42, eduction valve steel ball 43 and eduction valve 44 are formed the eduction valve combination, are installed on successively in the discharge orifice 41;
Piston cavity 49 upper ends are connected with control joint 37 external screw threads by internal thread, the lower end is connected with plunger shaft lower contact 50 by internal thread, piston 47 is positioned at the plunger shaft internal upper part, piston 47 outer walls are that concentric gap cooperates with piston cavity 49 inwalls, adopt the sealing of " O " type circle between piston 36 outer walls and piston cavity 49 inwalls, piston 47 endwisely slips in piston cavity 49, piston 47 is fixed on piston rod 48 upper ends by nut 46, piston 47 inwalls and piston rod 48 outer walls adopt the sealing of " O " type circle, piston rod 48 passes plunger shaft lower contact 50 central passages and extends in the liquid nitrogen chamber, plunger shaft lower contact bottom 58, piston rod 48 is a matched in clearance with plunger shaft lower contact 50 central passages, be provided with steam vent I51 lower surface in plunger shaft lower contact 50 upper surfaces and be provided with steam vent II54, outlet valve I52 is contained in the steam vent I51, and outlet valve 53 is contained in the steam vent II54;
Liquid nitrogen cavity 58 upper ends are connected with plunger shaft lower contact 50 external screw threads by internal thread, the lower end is taken over 65 external screw threads by internal thread and basket and is connected, liquid nitrogen container 59 is positioned at liquid nitrogen cavity 58, liquid nitrogen container upper support 55 is supported on liquid nitrogen container 59 upper ends, liquid nitrogen container lower support 60 is supported on liquid nitrogen container 59 lower ends, liquid nitrogen container 59 lower ends are spherical end surface, liquid nitrogen container upper support 55, be quiet the contact between liquid nitrogen container lower support 60 and liquid nitrogen container 59 upper and lower end faces, make liquid nitrogen container 59 and liquid nitrogen cavity 58 keep higher axiality, liquid nitrogen container 59 outer walls and liquid nitrogen cavity 58 inwalls are provided with the 2-4mm gap; Piston rod 48 extends to liquid nitrogen container 59 tops, liquid nitrogen piston 56 is fixed on piston rod 48 lower ends by nut 57, liquid nitrogen piston 56 is a matched in clearance with liquid nitrogen container 59 inwalls, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 outer walls and liquid nitrogen container 59 inwall gaps, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 inwalls and piston rod 48 outer wall gaps, under the promotion of piston rod 48, liquid nitrogen piston 56 is along liquid nitrogen container 59 inwall axially-movables, unidirectional valve seat 62, one way valve steel ball 61, pressure spring 63 and one-way valve spring seat 64 constitute the liquid nitrogen one way valve, the liquid nitrogen one way valve is threaded onto 59 jars of lower ends of liquid nitrogen by unidirectional valve seat 50 tops, uses the rubber pad static seal between one-way valve spring seat 64 lower ends and the basket catcher 65;
Freezing cavity 70 upper ends are threaded with basket catcher 65, basket 71 upper ends are threaded with basket catcher 65, freezing cavity 70 lower ends are threaded with clip spring seat 75, basket 71 constitutes freezing chamber with the annulus of freezing cavity 70 inwalls, the pipe 72 that narrows is lining in basket 71 inwalls, 65 quiet contacts are taken over basket in the upper end, and the lower end is seated on the clip spring seat 75 inwall steps, and non-return valve seat 69 is threaded onto basket with non-return valve ball 68 and takes in 65 screwed hole of centre; Outlet valve III67 is installed on basket and takes in the steam vent 66 of 65 lower ends, end cap 78 is threaded onto freezing cavity 70 lower ends, and with silicone rubber pad 77 sealing, constitute the freezing chamber of a sealing, clip spring seat 75 passes end cap 78, clip spring seat 75 outer walls and end cap 78 inwall matched in clearance, and the sealing of " O " type of employing circle, jump ring 76 is seated at clip spring seat 75 lower taper inwalls;
Outer pipe assembly comprises: bullet card chamber 12 is threaded with bullet block head 7, internal spline short circuit 17 tops are threaded with bullet card chamber 12, the lower end is threaded with internal spline 25, internal spline 25 passes through spline fitted with external splines 24, external splines 24 slides vertically, step limits external splines 24 sliding distance vertically of the step of internal spline 25 inwalls and external splines 24 outer walls, external splines 24 is by the outer tube 27 that is threaded, guider ring 73 is embedded in outer tube 26 lower end inwalls, reamer 74 is connected on the outer tube 26 lower end screw threads, guider ring 73 is compressed, and reamer 74 lower ends are connected with drill bit 79 by screw thread, are provided with the gap of 4-6mm between drill bit 79 and the clip spring seat 75.
The purpose of this utility model can also be achieved through the following technical solutions:
Control joint 37 centers are provided with the control piston passage, and control piston 38 compresses by control spring 39, and the control piston passage is shut, and when flushing liquor pressure reaches 0.5MPa, control piston 38 is pushed open.Be provided with the current by pass 40 of three right angle types around the piston channel that control joint 37 is provided with, current by pass 40 upper ends communicate with piston channel, the lower end communicates with plunger shaft, and after flushing liquor was pushed control piston 38 open, the flushing liquor circulation road of piston channel and right angle type connected.Liquid nitrogen container 59 and freezing cavity 70 are the double-layer vacuum heat insulating construction.Basket catcher 65 inclined holes that are provided with 80 constitute through hole with axial hole 81, and after the liquid nitrogen one way valve was opened, liquid nitrogen entered freezing chamber through this through hole.
Beneficial effect: the present invention adopts simple freezing sampling, uses liquid nitrogen as refrigerant, and liquid nitrogen gasifies fast in the refrigerating process, can realize snap frozen, and refrigerating effect is good; Wire line coring is combined with hole-bottom frozen, realize that not carrying brill cores fast; Inner tube assembly does not turn round when creeping into, thereby avoided largely turning round the destruction of the mechanical force of generation to the hydrate rock core because of drilling tool, more effectively improve core recovery percentage, integrity degree and representativeness, and adopted the quick sampling surface of tubular type that narrows, can obtain rock core fast on the face of land.
Description of drawings
Fig. 1～4 are: the hole bottom freezing cord coring drill structure chart;
Fig. 1 right-hand member connection layout 2 left ends, right-hand member connection layout 3 left ends of Fig. 2, Fig. 3 right-hand member connection layout 4 left ends.
1 spearhead, 2 retainer springs, 3 locking balls, 4 axis of cone, 5 pins, 6 carry and draw sleeve, and 7 play block heads, 8 hollow pin I, 9 play deck, 10 hollow pin II, 11 hinges, bullet card chambers 12,13 hollow pin III, 14 pins, 15 bullet cards, 16 rivets, 17 internal splines catcher, 18 hanging rings, 19 retaining nuts, 20 inclined hole I, 21 seat rings, 22 main shafts, 23 inclined hole II, 24 external splines, 25 internal splines, 26 outer tubes, 27 hollow mandrels, 28 locking nuts, 29 bearing doors, 30 interior pipe sleeves, 31 thrust bearings, 32 thrust bearings, 33 buffer springs, 34 catch, 35 connect short tube, 36 pistons, 37 control joints, 38 control pistons, 39 control springs, 40 current by pass, 41 discharge orifices, 42 eduction valve springs, 43 earial drainage valve balls, 44 earial drainage valve bodies, 45 catch, 46 nuts, 47 pistons, 48 piston rods, 49 piston cavities are taken under 50 plunger shaft, 51 steam vent I, 52 outlet valve I, 53 outlet valve II, 54 steam vent II, 55 liquid nitrogen container upper supports, 56 liquid nitrogen pistons, 57 nuts, 58 liquid nitrogen cavitys, 59 liquid nitrogen containers, 60 liquid nitrogen container lower supports, 61 unidirectional valve balls, 62 unidirectional valve seats, 63 one-way valve springs, 64 one-way valve spring seats, 65 baskets catcher, 66 steam vents, 67 outlet valve III, 68 non-return valve balls, 69 non-return valve seats, 70 freezing cavitys, 71 baskets, 72 pipes that narrow, 73 guider rings, 74 reamers, 75 clip spring seats, 76 jump rings, 77 sealing mats, 78 end caps, 79 drill bits, 80 inclined holes, 81 axial holes.
The specific embodiment
Be described in further detail below in conjunction with drawings and Examples:
Fig. 1 right-hand member connection layout 2 left ends in the accompanying drawing, the left end of the right-hand member connection layout 4 of right-hand member connection layout 3 left end Fig. 3 of Fig. 2 constitutes gas hydrate hole-bottom frozen rope sampler overall structure figure.
This drilling tool totally is made of inner tube assembly and outer pipe assembly, and in the drilling process, flushing liquor is via the drill bit place of inner tube assembly with the annular gap arrival drilling tool bottom of outer pipe assembly, and cutting carring returns to the face of land on the annular gap of drilling rod and hole wall.
Embodiment 1
Hole bottom freezing cord coring drill
At first assemble outer pipe assembly: bullet card chamber 12 is threaded with bullet block head 7, internal spline short circuit 17 tops are threaded with bullet card chamber 12, the lower end is threaded with internal spline 25, internal spline 25 passes through spline fitted with external splines 24, external splines 24 slides vertically, step limits external splines 24 sliding distance vertically of the step of internal spline 25 inwalls and external splines 24 outer walls, external splines 24 is by the outer tube 27 that is threaded, guider ring 73 is embedded in outer tube 26 lower end inwalls, reamer 74 is connected on the outer tube 26 lower end screw threads, guider ring 73 is compressed, and reamer 74 lower ends are connected with drill bit 79 by screw thread, are provided with the gap of 4mm between drill bit 79 and the clip spring seat 75.
Assemble inner tube assembly then: the assembling inner tube assembly in to liquid nitrogen container 59 filling 5L liquid nitrogen, spearhead 1 is hinged by the pin 5 and the axis of cone 4, spearhead 1 serves as that axle rotates 0 °～± 90 ° with pin 5, when in falling, managing like this, can prevent to drag for spearhead 1 deviates from from the crowfoot of fisher, in order to avoid manage and curve interior pipe in breaking, locking ball 3 is installed in the hole of spearhead 1 with retainer spring 2, when spearhead 1 and the axis of cone 4 are coaxial, locking ball 3 is absorbed in the ball-and-socket of the axis of cone 4, plays the positioning action to spearhead 1, guarantee spearhead 1 at inner tube assembly when drill string descends, keep coaxial, prevent that spearhead 1 from scraping retaining drill string inwall with inner tube assembly; Spearhead 1 is hinged by the pin 5 and the axis of cone 4, locking ball 3 and retainer spring 2 are installed between the spearhead 1 and the axis of cone 3, the axis of cone 4 employing hollow pin I8 are nested in to carry and draw sleeve 6 tops, carry and draw sleeve 6 and to play deck 9 concentric, and be matched in clearance, carry and draw sleeve 6 and slide vertically, hollow pin II10 passes the cotter slot that plays deck, the two ends rivet clasp draws on the sleeve wall carrying, play the move distance of the cotter slot of deck 9 by restriction hollow pin 10, the move distance vertically that draws sleeve 6 is carried in restriction, bullet card 15 adopts rivet 16 to form hinge type bullet fastening position mechanism with hinge 11, bullet card 15 fixed ends are fixed on by hollow pin III13 and play on the deck 9, playing deck 9 is connected with main shaft 22 by rivet 14, hanging ring 18 is installed in shoulder screw thread place, main shaft 22 top by screw thread, tighten up with retaining nut 19, main shaft 22 is a hollow structure, main shaft 22 top sidewalls are provided with the inclined hole I20 of 4 Φ 19, inclined hole I20 center line and main-shaft axis 22 angles at 45, main shaft 22 sidewalls of seat ring 21 bottoms are provided with the inclined hole II23 of 4 Φ 19, inclined hole II23 center line and main-shaft axis angle at 45, inclined hole I20 and inclined hole II23 are all circumferentially uniform along spindle outer wall, hollow mandrel 27 is connected with main shaft 22 bottoms by screw thread, and with tightening up round nut 28 lockings, axle cover 30 is a matched in clearance with hollow mandrel 27, it is thrust bearing 31 that axle is overlapped 30 upper ends, and the lower end is a thrust bearing 32, and thrust bearing 31 is seated at bearing door 29 inside, thrust bearing 32 is compressed by buffer spring 33, adopts back-up ring 34 and nut 35 that spring is fixed then;
Connection short tube 36 upper ends are overlapped 30 external screw threads by internal thread and axle and are connected, the lower end is connected with control joint 37 external screw threads by internal thread, hollow mandrel 27 lower ends will be inserted in control joint 37 upper holes, between be matched in clearance, control piston 38 is seated in the control joint 37 center piston passages, control spring 39 is pressed in control piston 38 bottoms, catch 45 compresses control spring, with holding screw catch 45 is fixed on the control joint 37, earial drainage spring 42, eduction valve steel ball 43 and eduction valve 44 are formed the eduction valve combination, are installed on successively in the discharge orifice 41;
Piston cavity 49 upper ends are connected with control joint 37 external screw threads by internal thread, the lower end is connected with plunger shaft lower contact 50 by internal thread, piston 47 is positioned at the plunger shaft internal upper part, piston 47 outer walls are that concentric gap cooperates with piston cavity 49 inwalls, adopt the sealing of " O " type circle between piston 36 outer walls and piston cavity 49 inwalls, piston 47 endwisely slips in piston cavity 49, piston 47 is fixed on piston rod 48 upper ends by nut 46, piston 47 inwalls and piston rod 48 outer walls adopt the sealing of " O " type circle, piston rod 48 passes plunger shaft lower contact 50 central passages and extends in the liquid nitrogen chamber, plunger shaft lower contact bottom 58, piston rod 48 is a matched in clearance with plunger shaft lower contact 50 central passages, be provided with steam vent I51 lower surface in plunger shaft lower contact 50 upper surfaces and be provided with steam vent II54, outlet valve I52 is contained in the steam vent I51, and outlet valve 53 is contained in the steam vent II54;
Liquid nitrogen cavity 58 upper ends are connected with plunger shaft lower contact 50 external screw threads by internal thread, the lower end is taken over 65 external screw threads by internal thread and basket and is connected, liquid nitrogen container 59 is positioned at liquid nitrogen cavity 58, liquid nitrogen container upper support 55 is supported on liquid nitrogen container 59 upper ends, liquid nitrogen container lower support 60 is supported on liquid nitrogen container 59 lower ends, liquid nitrogen container 59 lower ends are spherical end surface, liquid nitrogen container upper support 55, be quiet the contact between liquid nitrogen container lower support 60 and liquid nitrogen container 59 upper and lower end faces, make liquid nitrogen container 59 and liquid nitrogen cavity 58 keep higher axiality, liquid nitrogen container 59 outer walls and liquid nitrogen cavity 58 inwalls are provided with the 2mm gap; Piston rod 48 extends to liquid nitrogen container 59 tops, liquid nitrogen piston 56 is fixed on piston rod 48 lower ends by nut 57, liquid nitrogen piston 56 is a matched in clearance with liquid nitrogen container 59 inwalls, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 outer walls and liquid nitrogen container 59 inwall gaps, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 inwalls and piston rod 48 outer wall gaps, under the promotion of piston rod 48, liquid nitrogen piston 56 is along liquid nitrogen container 59 inwall axially-movables, unidirectional valve seat 62, one way valve steel ball 61, pressure spring 63 and one-way valve spring seat 64 constitute the liquid nitrogen one way valve, the liquid nitrogen one way valve is threaded onto 59 jars of lower ends of liquid nitrogen by unidirectional valve seat 50 tops, uses the rubber pad static seal between one-way valve spring seat 64 lower ends and the basket catcher 65;
Freezing cavity 70 upper ends are threaded with basket catcher 65, basket 71 upper ends are threaded with basket catcher 65, freezing cavity 70 lower ends are threaded with clip spring seat 75, basket 71 constitutes freezing chamber with the annulus of freezing cavity 70 inwalls, the pipe 72 that narrows is lining in basket 71 inwalls, 65 quiet contacts are taken over basket in the upper end, and the lower end is seated on the clip spring seat 75 inwall steps, and non-return valve seat 69 is threaded onto basket with non-return valve ball 68 and takes in 65 screwed hole of centre; Outlet valve III67 is installed on basket and takes in the steam vent 66 of 65 lower ends, end cap 78 is threaded onto freezing cavity 70 lower ends, and with silicone rubber pad 77 sealing, constitute the freezing chamber of a sealing, clip spring seat 75 passes end cap 78, clip spring seat 75 outer walls and end cap 78 inwall matched in clearance, and the sealing of " O " type of employing circle, jump ring 76 is seated at clip spring seat 75 lower taper inwalls.
Hole bottom freezing cord coring drill
At first assemble outer pipe assembly: bullet card chamber 12 is threaded with bullet block head 7, internal spline short circuit 17 tops are threaded with bullet card chamber 12, the lower end is threaded with internal spline 25, internal spline 25 passes through spline fitted with external splines 24, external splines 24 slides vertically, step limits external splines 24 sliding distance vertically of the step of internal spline 25 inwalls and external splines 24 outer walls, external splines 24 is by the outer tube 27 that is threaded, guider ring 73 is embedded in outer tube 26 lower end inwalls, reamer 74 is connected on the outer tube 26 lower end screw threads, guider ring 73 is compressed, and reamer 74 lower ends are connected with drill bit 79 by screw thread, are provided with the gap of 6mm between drill bit 79 and the clip spring seat 75.
Assemble inner tube assembly then: the assembling inner tube assembly in to liquid nitrogen container 59 filling 7L liquid nitrogen, spearhead 1 is hinged by the pin 5 and the axis of cone 4, spearhead 1 serves as that axle rotates 0 °～± 90 ° with pin 5, when in falling, managing like this, can prevent to drag for spearhead 1 deviates from from the crowfoot of fisher, in order to avoid manage and curve interior pipe in breaking, locking ball 3 is installed in the hole of spearhead 1 with retainer spring 2, when spearhead 1 and the axis of cone 4 are coaxial, locking ball 3 is absorbed in the ball-and-socket of the axis of cone 4, plays the positioning action to spearhead 1, guarantee spearhead 1 at inner tube assembly when drill string descends, keep coaxial, prevent that spearhead 1 from scraping retaining drill string inwall with inner tube assembly; Spearhead 1 is hinged by the pin 5 and the axis of cone 4, locking ball 3 and retainer spring 2 are installed between the spearhead 1 and the axis of cone 3, the axis of cone 4 employing hollow pin I8 are nested in to carry and draw sleeve 6 tops, carry and draw sleeve 6 and to play deck 9 concentric, and be matched in clearance, carry and draw sleeve 6 and slide vertically, hollow pin II10 passes the cotter slot that plays deck, the two ends rivet clasp draws on the sleeve wall carrying, play the move distance of the cotter slot of deck 9 by restriction hollow pin 10, the move distance vertically that draws sleeve 6 is carried in restriction, bullet card 15 adopts rivet 16 to form hinge type bullet fastening position mechanism with hinge 11, bullet card 15 fixed ends are fixed on by hollow pin III13 and play on the deck 9, playing deck 9 is connected with main shaft 22 by rivet 14, hanging ring 18 is installed in shoulder screw thread place, main shaft 22 top by screw thread, tighten up with retaining nut 19, main shaft 22 is a hollow structure, main shaft 22 top sidewalls are provided with the inclined hole I20 of 4 Φ 19, inclined hole I20 center line and main-shaft axis 22 angles at 45, main shaft 22 sidewalls of seat ring 21 bottoms are provided with the inclined hole II23 of 4 Φ 19, inclined hole II23 center line and main-shaft axis angle at 45, inclined hole I20 and inclined hole II23 are all circumferentially uniform along spindle outer wall, hollow mandrel 27 is connected with main shaft 22 bottoms by screw thread, and with tightening up round nut 28 lockings, axle cover 30 is a matched in clearance with hollow mandrel 27, it is thrust bearing 31 that axle is overlapped 30 upper ends, and the lower end is a thrust bearing 32, and thrust bearing 31 is seated at bearing door 29 inside, thrust bearing 32 is compressed by buffer spring 33, adopts back-up ring 34 and nut 35 that spring is fixed then;
Connection short tube 36 upper ends are overlapped 30 external screw threads by internal thread and axle and are connected, the lower end is connected with control joint 37 external screw threads by internal thread, hollow mandrel 27 lower ends will be inserted in control joint 37 upper holes, between be matched in clearance, control piston 38 is seated in the control joint 37 center piston passages, control spring 39 is pressed in control piston 38 bottoms, catch 45 compresses control spring, with holding screw catch 45 is fixed on the control joint 37, earial drainage spring 42, eduction valve steel ball 43 and eduction valve 44 are formed the eduction valve combination, are installed on successively in the discharge orifice 41;
Piston cavity 49 upper ends are connected with control joint 37 external screw threads by internal thread, the lower end is connected with plunger shaft lower contact 50 by internal thread, piston 47 is positioned at the plunger shaft internal upper part, piston 47 outer walls are that concentric gap cooperates with piston cavity 49 inwalls, adopt the sealing of " O " type circle between piston 36 outer walls and piston cavity 49 inwalls, piston 47 endwisely slips in piston cavity 49, piston 47 is fixed on piston rod 48 upper ends by nut 46, piston 47 inwalls and piston rod 48 outer walls adopt the sealing of " O " type circle, piston rod 48 passes plunger shaft lower contact 50 central passages and extends in the liquid nitrogen chamber, plunger shaft lower contact bottom 58, piston rod 48 is a matched in clearance with plunger shaft lower contact 50 central passages, be provided with steam vent I51 lower surface in plunger shaft lower contact 50 upper surfaces and be provided with steam vent II54, outlet valve I52 is contained in the steam vent I51, and outlet valve 53 is contained in the steam vent II54;
Liquid nitrogen cavity 58 upper ends are connected with plunger shaft lower contact 50 external screw threads by internal thread, the lower end is taken over 65 external screw threads by internal thread and basket and is connected, liquid nitrogen container 59 is positioned at liquid nitrogen cavity 58, liquid nitrogen container upper support 55 is supported on liquid nitrogen container 59 upper ends, liquid nitrogen container lower support 60 is supported on liquid nitrogen container 59 lower ends, liquid nitrogen container 59 lower ends are spherical end surface, liquid nitrogen container upper support 55, be quiet the contact between liquid nitrogen container lower support 60 and liquid nitrogen container 59 upper and lower end faces, make liquid nitrogen container 59 and liquid nitrogen cavity 58 keep higher axiality, liquid nitrogen container 59 outer walls and liquid nitrogen cavity 58 inwalls are provided with the 4mm gap; Piston rod 48 extends to liquid nitrogen container 59 tops, liquid nitrogen piston 56 is fixed on piston rod 48 lower ends by nut 57, liquid nitrogen piston 56 is a matched in clearance with liquid nitrogen container 59 inwalls, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 outer walls and liquid nitrogen container 59 inwall gaps, the sealing of " O " type circle is adopted in liquid nitrogen piston 56 inwalls and piston rod 48 outer wall gaps, under the promotion of piston rod 48, liquid nitrogen piston 56 is along liquid nitrogen container 59 inwall axially-movables, unidirectional valve seat 62, one way valve steel ball 61, pressure spring 63 and one-way valve spring seat 64 constitute the liquid nitrogen one way valve, the liquid nitrogen one way valve is threaded onto 59 jars of lower ends of liquid nitrogen by unidirectional valve seat 50 tops, uses the rubber pad static seal between one-way valve spring seat 64 lower ends and the basket catcher 65;
Freezing cavity 70 upper ends are threaded with basket catcher 65, basket 71 upper ends are threaded with basket catcher 65, freezing cavity 70 lower ends are threaded with clip spring seat 75, basket 71 constitutes freezing chamber with the annulus of freezing cavity 70 inwalls, the pipe 72 that narrows is lining in basket 71 inwalls, 65 quiet contacts are taken over basket in the upper end, and the lower end is seated on the clip spring seat 75 inwall steps, and non-return valve seat 69 is threaded onto basket with non-return valve ball 68 and takes in 65 screwed hole of centre; Outlet valve III67 is installed on basket and takes in the steam vent 66 of 65 lower ends, end cap 78 is threaded onto freezing cavity 70 lower ends, and with silicone rubber pad 77 sealing, constitute the freezing chamber of a sealing, clip spring seat 75 passes end cap 78, clip spring seat 75 outer walls and end cap 78 inwall matched in clearance, and the sealing of " O " type of employing circle, jump ring 76 is seated at clip spring seat 75 lower taper inwalls.
Claims (5)
1. hole bottom freezing cord coring drill, comprise outer pipe assembly and inner tube assembly, it is characterized in that, inner tube assembly comprises: spearhead (1) is hinged by the pin (5) and the axis of cone (4), locking ball (3) and retainer spring (2) are installed between the spearhead (1) and the axis of cone (3), the axis of cone (4) employing hollow pin I (8) is nested in to carry draws sleeve (6) top, carry and draw sleeve (6) and to play deck (9) concentric, and be matched in clearance, carry and draw sleeve (6) and slide vertically, hollow pin II (10) is passed the cotter slot that plays deck, the two ends rivet clasp draws on the sleeve wall carrying, cotter slot on the bullet deck (9) is by the move distance of restriction hollow pin (10), the move distance vertically that draws sleeve (6) is carried in restriction, bullet card (15) adopts rivet (16) to form hinge type bullet fastening position mechanism with hinge (11), the fixed end of bullet card (15) is fixed on by hollow pin III (13) and plays on the deck (9), playing deck (9) is connected with main shaft (22) by rivet (14), hanging ring (18) is installed in shoulder screw thread place, main shaft (22) top by screw thread, adopt retaining nut (19) to tighten up, main shaft (22) is a hollow structure, main shaft (22) top sidewall is provided with the inclined hole (20) of 4 Φ 19, inclined hole I (20) center line and main-shaft axis (22) angle at 45, main shaft (22) sidewall of seat ring (21) bottom is provided with the inclined hole II (23) of 4 Φ 19, inclined hole II (23) center line and main-shaft axis angle at 45, inclined hole I (20) is all circumferentially uniform along spindle outer wall with inclined hole II (23), hollow mandrel (27) is connected with main shaft (22) bottom by screw thread, and with tightening up round nut (28) locking, axle cover (30) is a matched in clearance with hollow mandrel (27), axle cover (30) upper end is thrust bearing (31), the lower end is thrust bearing (32), thrust bearing (31) is seated at bearing door (29) inside, thrust bearing (32) is compressed by buffer spring (33), adopts back-up ring (34) and nut (35) that spring is fixed then; Connecting short tube (36) upper end is connected with axle cover (30) external screw thread by internal thread, the lower end is connected with control joint (37) external screw thread by internal thread, hollow mandrel (27) lower end will be inserted in control joint (37) upper hole, between be matched in clearance, control piston (38) is seated in control joint (37) the center piston passage, control spring (39) is pressed in control piston (38) bottom, catch (45) compresses control spring, with holding screw catch (45) is fixed on the control joint (37), earial drainage spring (42), eduction valve steel ball (43) and eduction valve (44) are formed the eduction valve combination, are installed on successively in the discharge orifice (41); Piston cavity (49) upper end is connected with control joint (37) external screw thread by internal thread, the lower end is connected with plunger shaft lower contact (50) by internal thread, piston (47) is positioned at the plunger shaft internal upper part, piston (47) outer wall is that concentric gap cooperates with piston cavity (49) inwall, adopt the sealing of " O " type circle between piston (36) outer wall and piston cavity (49) inwall, piston (47) endwisely slips in piston cavity (49), piston (47) is fixed on piston rod (48) upper end by nut (46), piston (47) inwall and piston rod (48) outer wall adopt the sealing of " O " type circle, piston rod (48) passes plunger shaft lower contact (50) central passage and extends in the liquid nitrogen chamber, plunger shaft lower contact bottom (58), piston rod (48) is a matched in clearance with plunger shaft lower contact (50) central passage, be provided with steam vent I (51) lower surface in plunger shaft lower contact (50) upper surface and be provided with steam vent II (54), outlet valve I (52) is contained in the steam vent I (51), and outlet valve II (53) is contained in the steam vent II (54); Liquid nitrogen cavity (58) upper end is connected with plunger shaft lower contact (50) external screw thread by internal thread, the lower end is connected with basket catcher (65) external screw thread by internal thread, liquid nitrogen container (59) is positioned at liquid nitrogen cavity (58), liquid nitrogen container upper support (55) is supported on liquid nitrogen container (59) upper end, liquid nitrogen container lower support (60) is supported on liquid nitrogen container (59) lower end, liquid nitrogen container (59) lower end is a spherical end surface, liquid nitrogen container upper support (55), be quiet the contact between liquid nitrogen container lower support (60) and liquid nitrogen container (59) upper and lower end face, make liquid nitrogen container (59) and liquid nitrogen cavity (58) keep higher axiality, liquid nitrogen container (59) outer wall and liquid nitrogen cavity (58) inwall are provided with the 2-4mm gap; Piston rod (48) extends to liquid nitrogen container (59) top, liquid nitrogen piston (56) is fixed on piston rod (48) lower end by nut (57), liquid nitrogen piston (56) is a matched in clearance with liquid nitrogen container (59) inwall, the sealing of " O " type circle is adopted in liquid nitrogen piston (56) outer wall and liquid nitrogen container (59) inwall gap, the sealing of " O " type circle is adopted in liquid nitrogen piston (56) inwall and piston rod (48) outer wall gap, under the promotion of piston rod (48), liquid nitrogen piston (56) is along liquid nitrogen container (59) inwall axially-movable, unidirectional valve seat (62), one way valve steel ball (61), pressure spring (63) and one-way valve spring seat (64) constitute the liquid nitrogen one way valve, the liquid nitrogen one way valve is threaded onto liquid nitrogen (59) jar lower end by unidirectional valve seat (50) top, and one-way valve spring seat (64) lower end is taken between (65) with basket and used the rubber pad static seal; Freezing cavity (70) upper end is threaded with basket catcher (65), basket (71) upper end is threaded with basket catcher (65), freezing cavity (70) lower end is threaded with clip spring seat (75), basket (71) constitutes freezing chamber with the annulus of freezing cavity (70) inwall, the pipe (72) that narrows is lining in basket (71) inwall, the upper end takes over basket that (65) are quiet to be contacted, the lower end is seated on clip spring seat (75) the inwall step, and non-return valve seat (69) is threaded onto in basket catcher (65) screwed hole of centre with non-return valve ball (68); Outlet valve III (67) is installed in the steam vent (66) of basket catcher (65) lower end, end cap (78) is threaded onto freezing cavity (70) lower end, and seal with silicone rubber pad (77), constitute the freezing chamber of a sealing, clip spring seat (75) passes end cap (78), clip spring seat (75) outer wall and end cap (78) inwall matched in clearance, and the sealing of " O " type of employing circle, jump ring (76) is seated at clip spring seat (75) lower taper inwall; Outer pipe assembly comprises: bullet card chamber (12) is threaded with bullet block head (7), internal spline short circuit (17) top is threaded with bullet card chamber (12), the lower end is threaded with internal spline (25), internal spline (25) passes through spline fitted with external splines (24), external splines (24) slides vertically, step limits external splines (24) sliding distance vertically of the step of internal spline (25) inwall and external splines (24) outer wall, external splines (24) is by the outer tube that is threaded (27), guider ring (73) is embedded in outer tube (26) lower end inwall, reamer (74) is connected on the screw thread of outer tube (26) lower end, guider ring (73) is compressed, reamer (74) lower end is connected with drill bit (79) by screw thread, is provided with the gap of 4-6mm between drill bit (79) and the clip spring seat (75).
2. according to the described hole bottom freezing cord coring drill of claim 1, it is characterized in that, control joint (37) center is provided with the control piston passage, control piston (38) compresses by control spring (39), the control piston passage is shut, when flushing liquor pressure reaches 0.5MPa, control piston (38) is pushed open.
3. according to the described hole bottom freezing cord coring drill of claim 1, it is characterized in that, be provided with the current by pass (40) of three right angle types around the piston channel that control joint (37) is provided with, current by pass (40) upper end communicates with piston channel, the lower end communicates with plunger shaft, after flushing liquor was pushed control piston (38) open, the flushing liquor circulation road of piston channel and right angle type connected.
4. according to the described hole bottom freezing cord coring drill of claim 1, it is characterized in that liquid nitrogen container (59) and freezing cavity (70) are the double-layer vacuum heat insulating construction.
5. according to the described hole bottom freezing cord coring drill of claim 1, it is characterized in that the inclined hole (80) that basket catcher (65) is provided with constitutes through hole with axial hole (81), after the liquid nitrogen one way valve was opened, liquid nitrogen entered freezing chamber through this through hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202047194U CN201835777U (en) | 2010-05-27 | 2010-05-27 | Hole bottom freezing rope core drill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202047194U CN201835777U (en) | 2010-05-27 | 2010-05-27 | Hole bottom freezing rope core drill |
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| CN201835777U true CN201835777U (en) | 2011-05-18 |
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| CN101864916A (en) * | 2010-05-27 | 2010-10-20 | 吉林大学 | Hole bottom freezing cord coring drill and coring method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20110518 Termination date: 20140527 |