CN111140213B - Heating method special for coal bed gas thermal recovery - Google Patents
Heating method special for coal bed gas thermal recovery Download PDFInfo
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- CN111140213B CN111140213B CN201911219903.8A CN201911219903A CN111140213B CN 111140213 B CN111140213 B CN 111140213B CN 201911219903 A CN201911219903 A CN 201911219903A CN 111140213 B CN111140213 B CN 111140213B
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- 238000011084 recovery Methods 0.000 title claims abstract description 59
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 76
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/06—Endless track vehicles with tracks without ground wheels
- B62D55/065—Multi-track vehicles, i.e. more than two tracks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/084—Endless-track units or carriages mounted separably, adjustably or extensibly on vehicles, e.g. portable track units
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/40—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable
- B65H75/42—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles
- B65H75/425—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools, machines or vehicles attached to, or forming part of a vehicle, e.g. truck, trailer, vessel
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/002—Down-hole drilling fluid separation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The heating method special for coal bed gas thermal recovery comprises the following steps: the method comprises the following steps that firstly, the length of a coal seam to be thermally mined is L, a ground control center, a generator and a ground wire winding vehicle are arranged on the ground above the coal seam, wherein an intelligent cable winch is arranged on the ground wire winding vehicle, a high-temperature-resistant tensile cable is wound on the intelligent cable winch, and a first tension sensor is arranged at a wire outlet end of the intelligent cable winch; n groups of hollow pipeline robot groups are assembled, one end of a high-temperature-resistant tensile cable is connected with the generator, and the other end of the high-temperature-resistant tensile cable is connected with the rearmost hollow pipeline robot group; in conclusion, the coal bed methane mining device has the advantages of high automation degree, convenience in operation, good coal powder removing effect and capability of improving the coal bed methane mining efficiency.
Description
Technical Field
The invention belongs to the technical field of coal bed gas exploitation, and particularly relates to a heating method special for coal bed gas thermal exploitation.
Background
The coal bed gas is hydrocarbon gas which is stored in a coal bed, takes methane as a main component, is adsorbed on the surface of coal matrix particles as a main component, is partially dissociated in coal pores or dissolved in coal bed water, is an associated mineral resource of coal, belongs to unconventional natural gas, and is a clean and high-quality energy and chemical raw material which is grown internationally in nearly twenty years. Because the permeability of coal seams in China is generally low, the gas extraction mode and effect are greatly limited. Therefore, how to improve the permeability of the coal seam and further achieve the purpose of enhancing gas extraction is an important problem in the coal industry. Experts at home and abroad propose methods and technologies for improving the permeability of a coal seam, which mainly comprise the following steps: hydraulic measures such as a hydraulic fracturing method and a hydraulic fracture method, a multi-gas displacement method, deep hole presplitting blasting, a cross hole arrangement method and the like. The methods play a certain role in enhancing coal seam gas extraction, but the application effect is limited by conditions such as geological factors, field factors and the like.
The idea of coal bed heat injection enhanced gas extraction is derived from a thermal oil displacement method in oil exploitation, and the yield increase mechanism is as follows: by injecting superheated steam into the coal bed, the temperature of the coal body is increased, the gas desorption is promoted, and the permeability of the coal bed is improved, so that the gas enhanced extraction is realized.
Disclosure of Invention
The invention provides a heating method special for coal bed gas thermal recovery, which aims to overcome the defects in the prior art and improve the coal bed gas recovery efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: the heating method special for coal bed gas thermal recovery comprises the following steps:
the method comprises the following steps that firstly, the length of a coal seam to be thermally mined is L, a ground control center, a generator and a ground wire winding vehicle are arranged on the ground above the coal seam, wherein an intelligent cable winch is arranged on the ground wire winding vehicle, a high-temperature-resistant tensile cable is wound on the intelligent cable winch, and a first tension sensor is arranged at a wire outlet end of the intelligent cable winch; n groups of hollow pipeline robot groups are assembled, one end of a high-temperature-resistant tensile cable is connected with the generator, and the other end of the high-temperature-resistant tensile cable is connected with the rearmost hollow pipeline robot group; the intelligent cable winch, the first tension sensor, the generator and all the hollow pipeline robot groups are respectively connected with the ground control center through control lines;
step two, sequentially conveying each group of hollow pipeline robot groups to the specified position of the coalbed methane thermal recovery channel, wherein at the moment, the n groups of hollow pipeline robot groups are arranged side by side at intervals, and two adjacent groups are arrangedThe distance between the hollow pipeline robot groups is L1，L1=L/n；
Step three, starting each group of hollow pipeline robot groups to enable the hollow pipeline robot groups to be in butt joint with a group of hollow pipeline robot groups in front through an electromagnetic butt joint device, and at the moment, completely stretching out the combined type spiral resistance wires in each group of hollow pipeline robot groups;
fixing each group of hollow pipeline robot groups in the wall of the coalbed methane thermal recovery channel, and sealing a gap between each group of hollow pipeline robot groups and the wall of the coalbed methane thermal recovery channel so that each group of hollow pipeline robot groups forms a relatively sealed space in the coalbed methane thermal recovery channel;
step five, starting a generator, wherein the generator is electrically connected with the combined type spiral resistance wires of all the hollow pipeline robot groups through high-temperature-resistant tensile cables, the generator provides electric energy required by heating the resistance wires, and water heated by the resistance wires generates large pressure and is pressed into a coal seam;
and step six, after the heating work is finished, the generator is closed, the electromagnetic butt joint device is controlled, the hollow pipeline robot group is separated from a group of hollow pipeline robot groups in front, then the combined type spiral resistance wire of each group of hollow pipeline robot groups is withdrawn, and all the hollow pipeline robot groups are withdrawn to the ground from the coal bed gas thermal recovery channel.
Hollow formula pipeline robot group includes pipeline robot A, pipeline robot B and sub-power device, and pipeline robot A and pipeline robot B pass through two combined type spiral resistance wires and connect, and two combined type spiral resistance wires pass sub-power device, sub-power device can dismantle the rear portion of connection at pipeline robot B, two combined type spiral resistance wires all accomodate inside pipeline robot A.
The pipeline robot A comprises a pipeline machine device and two groups of resistance wire coiling devices;
the pipeline machine device comprises a control unit and a cylindrical shell, wherein two ends of the shell are respectively plugged by plugging plates, a round hole is formed in each plugging plate, a cylindrical pipeline is fixed in the shell, and two ends of the cylindrical pipeline are respectively fixed at the round holes of the two plugging plates; the periphery of two end parts of the shell is provided with a high-temperature resistant rubber air bag group, the high-temperature resistant rubber air bag group consists of a plurality of high-temperature resistant rubber air bags, the plurality of high-temperature resistant rubber air bags are arranged in an annular array along the circumferential direction of the shell, an independent installation cavity is arranged in each high-temperature resistant rubber air bag, an air bag inflating mechanism is arranged in each installation cavity, and an automatic exhaust valve is arranged on each high-temperature resistant rubber air bag; a plurality of groups of travelling mechanisms and a plurality of groups of fixed anchor rod pieces are arranged on the periphery of the shell, the travelling mechanisms are arranged side by side at intervals along the circumferential direction of the shell, the fixed anchor rod pieces are arranged side by side at intervals along the circumferential direction of the shell, and each group of fixed anchor rod pieces are positioned between two adjacent groups of travelling mechanisms; a temperature sensor is arranged on the plugging plate positioned at the front side, a positioning sensor is arranged on the inner wall of the shell, and an electric valve is arranged in the middle of the cylinder pipeline; the control unit is respectively in data connection with the positioning sensor, the temperature sensor, the automatic exhaust valve, the electric valve, the air bag inflating mechanism, the travelling mechanism, the fixed anchor rod piece and the ground control center;
a containing cavity is formed between the inner wall of the shell of the pipeline machine device and the outer wall of the cylindrical pipeline, and the two groups of resistance wire coiling devices are symmetrically positioned in the containing cavity;
the pipe robot B has the same structure as the pipe machine apparatus.
The air bag inflating mechanism comprises an igniter, an igniter and sodium azide, and an inflating hole communicated with the inner cavity of the high-temperature resistant rubber air bag is formed in the mounting cavity; the igniter is in data connection with the control unit;
the walking mechanism comprises a driving device and crawler wheels, each crawler wheel consists of a crawler and a plurality of supporting wheels, the crawler is positioned on the outer sides of the plurality of supporting wheels and is in a tensioning state, two ends of a wheel shaft of each supporting wheel are connected to the shell through telescopic connecting pieces respectively, each telescopic connecting piece comprises an upper connecting rod and a lower connecting rod, the lower end of each lower connecting rod is hinged to the side wall of the shell, the upper end of each upper connecting rod is hinged to the end part of the wheel shaft of each supporting wheel, the lower end of each upper connecting rod is hinged to the upper end of each lower connecting rod, and a first electric telescopic rod is hinged between the middle part of each lower connecting rod and the middle part of each upper connecting rod; the driving device is in transmission connection with one of the supporting wheels, and the control unit is in data connection with the driving device and all the first electric telescopic rods;
the fixed anchor rod piece comprises a fixed anchor rod and an installation frame, the fixed anchor rod is of an electric cylinder structure, the lower end of the fixed anchor rod is hinged to the installation frame, and a second electric telescopic rod is hinged between the lower part of the fixed anchor rod and the installation frame; the control unit is in data connection with the fixed anchor rod and the second electric telescopic rod;
the resistance wire winding device comprises a straightener, a winding guide disc, a driving motor and a resistance wire winding drum, the resistance wire winding drum is rotatably connected in a storage cavity, the straightener and the winding guide disc are both arranged in the storage cavity and positioned at the front end of the resistance wire winding drum, a first servo motor and a second servo motor are also arranged in the storage cavity, the first servo motor is in transmission connection with one wheel of the straightener, the second servo motor is in transmission connection with the winding guide disc, and the driving motor is in transmission connection with the resistance wire winding drum;
a resistance wire penetrating opening is formed in the plugging plate positioned on the front side, the composite spiral resistance wire is wound on a resistance wire winding drum, and the movable end of the composite spiral resistance wire sequentially passes through a winding guide disc and a straightener and then penetrates out of the resistance wire penetrating opening; the movable end of the combined spiral resistance wire penetrates out of the resistance wire penetrating port and then is connected to the rear part of the pipeline robot B; the first servo motor, the second servo motor and the driving motor are in data connection with the control unit;
a cleaning sleeve is fixed at the penetration opening of the resistance wire, and an incrustation scale storage bin positioned below the cleaning sleeve is fixed on the plugging plate positioned at the front side.
The sub-power device comprises a mounting box, and the mounting box is detachably connected with the rear part of the pipeline robot B through an electromagnet; third electric telescopic rods are symmetrically arranged at the upper part and the lower part of the mounting box, a push rod part of each third electric telescopic rod penetrates out of the wall of the mounting box, and a high-temperature-resistant rubber sleeve is sleeved at a push rod part of each third electric telescopic rod; two groups of spiral propelling pieces are arranged in the mounting box, each spiral propelling piece comprises a third servo motor and a threaded sleeve, the center line of each threaded sleeve is arranged along the front-back direction, two ends of each threaded sleeve are respectively and rotatably connected to the mounting box through bearings, a driven gear is arranged on the outer wall of each threaded sleeve, a main gear is arranged on a main shaft of each third servo motor and meshed with the driven gear, a threaded structure is arranged outside the combined type spiral resistance wire, and the combined type spiral resistance wire penetrates through the threaded sleeves and is in threaded fit with the threaded sleeves; the third electric telescopic rod and the third servo motor are both in data connection with the ground control center;
the combined type spiral resistance wire is formed by mutually winding a resistance wire and a tensile wire, and the outer wall of the combined type spiral resistance wire is provided with a metal ceramic coating.
The two adjacent groups of hollow pipeline robot groups are connected through three groups of electromagnetic butt joint devices, each group of electromagnetic butt joint devices comprises an elastic connector, a butt joint groove, a locking motor and a mechanical lock shaft, the rear end of the elastic connector is fixed on a plugging plate on the front side of the pipeline robot B, a butt joint is installed at the front end of the elastic connector, and an electromagnetic coil A connected with the butt joint is arranged at the front end of the elastic connector; the butt joint groove is arranged at the front end of a containing cavity of the pipeline robot A, the electromagnetic coil B is arranged at the rear end of the butt joint groove, the mechanical lock shaft is arranged at the front end of the butt joint groove, the locking motor is arranged at the front end of the containing cavity, and the locking motor is connected with the mechanical lock shaft; the elastic connector is inserted in the butt-joint groove;
the locking motor and the electromagnetic coil B are in data connection with a control unit in the pipeline robot A, and the electromagnetic coil A is in data connection with the control unit in the pipeline robot B.
The concrete process of the third step is as follows:
(1) the control unit controls the control unit of the pipeline robot A and the control unit of the pipeline robot B through the ground control center, the control unit simultaneously starts two groups of resistance wire winding devices of the pipeline robot A, so that the driving motor drives the resistance wire winding drum to rotate, the first servo motor drives the straightener to transmit, the second servo motor drives the winding guide disc to rotate, and the combined type spiral resistance wire on the resistance wire winding drum slowly penetrates out of the resistance wire through opening under the double traction of the straightener and the winding guide disc;
at the same time, the control unit moves the pipeline robot B forward by activating the traveling mechanism of the pipeline robot B, and reaches 1/2L when the traveling mechanism reaches 1/2L1When the position is determined, the sub-power device is fixed on the wall of the coal bed gas thermal recovery channel;
(2) the sub-power device forms a propelling force to the composite spiral resistance wire, and the pipeline robot B continues to move forward under the driving of the walking mechanism;
(3) reaches L by the robot B in the pipeline1During the position, elastic connector on the pipeline robot B pops out and inserts in the pipeline robot A's of a set of cavity formula pipeline robot group in the place ahead butt joint recess, start locking motor, mechanical lock axle locking butt joint, solenoid A attracts each other with solenoid B after getting electricity, accomplish the butt joint process of cavity formula pipeline robot group and a set of cavity formula pipeline robot group in the place ahead so far, under the dual traction of pipeline robot B and sub-power device, combined type spiral resistance wire on the resistance wire reel in the pipeline robot A is pulled out completely.
The step (1) of driving the pipeline robot B to walk forwards by the walking mechanism comprises the following steps: starting all the first electric telescopic rods, supporting the crawler on the wall of the coalbed methane thermal recovery channel after the first electric telescopic rods are extended, and then driving one of the supporting wheels to rotate by the driving device, so that the supporting wheels drive the crawler to move along the wall of the coalbed methane thermal recovery channel, and finally, the pipeline robot B walks forwards under the driving of the crawler;
the method for fixing the sub-power device on the wall of the coal bed gas thermal recovery channel comprises the following steps: starting all the third electric telescopic rods, and supporting the third electric telescopic rods on the wall of the laminar gas thermal recovery channel after the third electric telescopic rods extend to finish the fixation of the sub-power device;
the step (2) of forming the propelling force to the composite spiral resistance wire by the neutron power device comprises the following steps: and starting a third servo motor of the two groups of spiral propelling pieces, wherein the third servo motor drives the threaded sleeve to rotate through the main gear and the driven gear, and the threaded sleeve is in threaded fit with the combined spiral resistance wire, so that the forward propelling force is formed on the combined spiral resistance wire after the threaded sleeve rotates.
Step four is fixed in the hot channel wall of adopting of coal bed gas with every hollow pipeline robot group of group to seal the hollow pipeline robot group and the hot space of adopting between the channel wall of adopting of coal bed gas, make every hollow pipeline robot group of group form the concrete process in the hot channel wall of adopting of coal bed gas in the relatively sealed space and be: starting all fixing anchor rod pieces of a pipeline robot A and a pipeline robot B of the hollow pipeline robot group, extending the second electric telescopic rod, jacking the fixing anchor rods outwards, and then starting and supporting the fixing anchor rods on the wall of the coalbed methane thermal recovery channel;
and then starting all airbag inflating mechanisms of the pipeline robot A and the pipeline robot B of the hollow pipeline robot group, igniting an igniter to generate a large amount of heat, heating the sodium azide to immediately decompose and release nitrogen, inflating the nitrogen into the inner cavity of the high-temperature-resistant rubber airbag from the inflating hole, inflating the high-temperature-resistant rubber airbag to expand and support the high-temperature-resistant rubber airbag on the wall of the coalbed methane thermal recovery channel, finally closing a gap between the hollow pipeline robot group and the wall of the coalbed methane thermal recovery channel by the high-temperature-resistant rubber airbag, and finally starting the electric valve to close the cylindrical pipeline.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) hollow formula pipeline robot group comprises pipeline robot A and pipeline robot B, and wherein pipeline robot B is drive arrangement, and pipeline robot B is for storing the resistance wire device, and pipeline robot A and pipeline robot B are the design of hollow pipeline formula, and coal seam fracturing rivers can directly pass from here, do not influence the normal exploitation work of coal bed gas.
(2) This pipeline robot adopts anterior drive arrangement and the two segmentation designs of storage device at rear portion, and the centre is crossed water hose through flexible center and is carried the hose to link to each other with the buggy, is convenient for turn in a flexible way in the pipeline, prevents that monomer overlength card from locating at the turn of pipeline.
(3) The hollow pipeline robot group can be fixed in a coal bed gas thermal recovery channel through a fixed anchor rod piece, then the hollow pipeline robot group is inflated by a high-temperature-resistant rubber air bag and then expanded and supported on the wall of the coal bed gas thermal recovery channel, finally the high-temperature-resistant rubber air bag seals a gap between the hollow pipeline robot group and the wall of the coal bed gas thermal recovery channel, and the composite spiral resistance wire heats water flow in a closed cavity;
(4) the ground control center can analyze the signals transmitted by the sensors and control the power output distribution according to different conditions.
(6) The telescopic driving of electric telescopic handle is gone up connecting rod and lower connecting rod and is outwards extended or retract, can make small-size crawler-type running gear adjust that stretches out and draws back like this according to the internal diameter of pipeline, and small-size crawler-type running gear's track and pipeline inner wall roof pressure contact drive whole pipeline robot and remove along the pipeline inner wall.
In conclusion, the coal bed methane mining device has the advantages of high automation degree, convenience in operation, good coal powder removing effect and capability of improving the coal bed methane mining efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the pipeline robot A;
FIG. 3 is an enlarged view at H in FIG. 2;
fig. 4 is a sectional view of the pipe robot a;
FIG. 5 is a schematic view of an electromagnetic docking assembly;
FIG. 6 is a schematic diagram of the hollow pipe robot set docking with a front set of hollow pipe robots;
FIG. 7 is an enlarged view at K of FIG. 6;
FIG. 8 is a schematic view of the construction of the sub-power unit;
fig. 9 is a structural schematic diagram of the composite spiral resistance wire.
Detailed Description
As shown in fig. 1 to 9, the heating method special for coal bed methane thermal recovery of the invention comprises the following steps:
the method comprises the following steps that firstly, the length of a coal seam to be thermally mined is L, a ground control center 1, a generator 2 and a ground wire winding vehicle 3 are arranged on the ground above the coal seam, wherein an intelligent cable winch 4 is arranged on the ground wire winding vehicle 3, a high-temperature-resistant tensile cable 5 is wound on the intelligent cable winch 4, and a first tension sensor 6 is arranged at a wire outlet end of the intelligent cable winch 4; n groups of hollow pipeline robot groups are assembled, one end of a high-temperature-resistant tensile cable 5 is connected with the generator 2, and the other end of the high-temperature-resistant tensile cable 5 is connected with the hollow pipeline robot group at the rear; the intelligent cable winch 4, the first tension sensor 6, the generator 2 and all the hollow pipeline robot groups are respectively connected with the ground control center 1 through control lines;
step two, in proper order with every hollow pipeline robot group of group send to the assigned position of coal bed gas thermal recovery passageway 8, n hollow pipeline robot groups of group set up side by side at interval this moment, and the distance between two sets of adjacent hollow pipeline robot groups is L1，L1=L/n；
Step three, starting each group of hollow pipeline robot groups to enable the hollow pipeline robot groups to be in butt joint with a group of hollow pipeline robot groups in front through an electromagnetic butt joint device, and at the moment, completely stretching out the combined type spiral resistance wires in each group of hollow pipeline robot groups;
fixing each group of hollow pipeline robot groups in the wall of the coal bed gas thermal recovery channel 8, and sealing gaps between the hollow pipeline robot groups and the wall of the coal bed gas thermal recovery channel 8 so that each group of hollow pipeline robot groups forms a relatively sealed space in the coal bed gas thermal recovery channel 8;
step five, starting the generator 2, electrically connecting the generator 2 with the combined type spiral resistance wires 9 of all the hollow pipeline robot groups through the high-temperature resistant tensile cables 5, providing electric energy required by heating the resistance wires through the generator 2, and generating larger pressure intensity by water heated by the resistance wires and pressing the water into a coal bed;
step six, after the heating work is finished, the generator 2 is closed, the electromagnetic butt joint device is controlled, the hollow pipeline robot group is separated from a group of hollow pipeline robot group in front, then the combined type spiral resistance wire 9 of each group of hollow pipeline robot group is withdrawn, and all the hollow pipeline robot groups are withdrawn to the ground from the coal bed gas thermal recovery channel 8.
Hollow pipeline robot group includes pipeline robot A100, pipeline robot B101 and sub-power device 10, and pipeline robot A100 and pipeline robot B101 connect through two combined type spiral resistance wire 9, and two combined type spiral resistance wire 9 pass sub-power device 10, sub-power device 10 can dismantle the rear portion of connection at pipeline robot B101, two combined type spiral resistance wire 9 all accomodate inside pipeline robot A100.
The pipeline robot A100 comprises a pipeline machine device and two groups of resistance wire coiling devices;
the pipeline machine device comprises a control unit 11 and a cylindrical shell 12, wherein two ends of the shell 12 are respectively sealed by sealing plates 13, each sealing plate 13 is provided with a round hole, a cylindrical pipeline 14 is fixed in the shell 12, and two ends of the cylindrical pipeline 14 are respectively fixed at the round holes of the two sealing plates 13; high-temperature-resistant rubber air bags are arranged on the peripheries of two end parts of the shell 12, each high-temperature-resistant rubber air bag group is composed of a plurality of high-temperature-resistant rubber air bags 15, the high-temperature-resistant rubber air bags 15 are arranged in an annular array along the circumferential direction of the shell 12, an independent installation cavity is arranged inside each high-temperature-resistant rubber air bag 15, an air bag inflating mechanism is arranged in each installation cavity, and an automatic exhaust valve is arranged on each high-temperature-resistant rubber air bag 15; a plurality of groups of travelling mechanisms 16 and a plurality of groups of fixed anchor rods 17 are arranged on the periphery of the shell 12, the plurality of groups of travelling mechanisms 16 are arranged side by side at intervals along the circumferential direction of the shell 12, the plurality of groups of fixed anchor rods 17 are arranged side by side at intervals along the circumferential direction of the shell 12, and each group of fixed anchor rods 17 is positioned between two adjacent groups of travelling mechanisms 16; a temperature sensor 102 is arranged on the plugging plate 13 positioned at the front side, a positioning sensor 18 is arranged on the inner wall of the shell 12, and an electric valve 19 is arranged in the middle of the cylindrical pipeline 14; the control unit 11 is respectively in data connection with a positioning sensor 18, a temperature sensor 102, an automatic exhaust valve, an electric valve 19, an air bag inflating mechanism, a travelling mechanism 16, a fixed anchor rod 17 and a ground control center 1;
a containing cavity is formed between the inner wall of the shell 12 of the pipeline machine device and the outer wall of the cylindrical pipeline 14, and the two groups of resistance wire coiling devices are symmetrically positioned in the containing cavity;
the pipe robot B101 has the same structure as the pipe robot apparatus.
The air bag inflating mechanism comprises an igniter, an igniter and sodium azide, and an inflating hole communicated with the inner cavity of the high-temperature resistant rubber air bag 15 is formed in the mounting cavity; the igniter is in data connection with the control unit 11;
the walking mechanism 16 comprises a driving device 21 and crawler wheels 22, each crawler wheel 22 comprises a crawler 23 and a plurality of supporting wheels 24, the crawler 23 is positioned outside the plurality of supporting wheels 24 and is in a tensioning state, two ends of a wheel shaft of each supporting wheel 24 are respectively connected to the shell 12 through telescopic connecting pieces, each telescopic connecting piece comprises an upper connecting rod 25 and a lower connecting rod 26, the lower end of each lower connecting rod 26 is hinged to the side wall of the shell 12, the upper end of each upper connecting rod 25 is hinged to the end part of the wheel shaft of the corresponding supporting wheel 24, the lower end of each upper connecting rod 25 is hinged to the upper end of each lower connecting rod 26, and a first electric telescopic rod 27 is hinged between the middle part of each lower connecting rod 26 and the middle part of each upper connecting rod 25; the driving device 21 is in transmission connection with one of the supporting wheels 24, and the control unit 11 is in data connection with the driving device 21 and all the first electric telescopic rods 27;
the fixed anchor rod piece 17 comprises a fixed anchor rod 28 and an installation frame 29, the fixed anchor rod 28 is of an electric cylinder structure, the lower end of the fixed anchor rod 28 is hinged to the installation frame 29, and a second electric telescopic rod 30 is hinged between the lower part of the fixed anchor rod 28 and the installation frame 29; the control unit 11 is in data connection with the fixed anchor rod 28 and the second electric telescopic rod 30;
the resistance wire coiling device comprises a straightener 31, a winding guide disc 32, a driving motor and a resistance wire coiling drum 33, the resistance wire coiling drum 33 is rotatably connected in the containing cavity, the straightener 31 and the winding guide disc 32 are both arranged in the containing cavity and positioned at the front end of the resistance wire coiling drum 33, a first servo motor 103 and a second servo motor 104 are also arranged in the containing cavity, the first servo motor 103 is in transmission connection with one wheel of the straightener 31, the second servo motor 104 is in transmission connection with the winding guide disc 32, and the driving motor is in transmission connection with the resistance wire coiling drum 33;
a resistance wire penetrating opening is formed in the blocking plate 13 positioned on the front side, the composite spiral resistance wire 9 is wound on a resistance wire winding drum 33, and the movable end of the composite spiral resistance wire 9 sequentially passes through the winding guide disc 32 and the straightener 31 and then penetrates out of the resistance wire penetrating opening forwards; the movable end of the combined spiral resistance wire 9 is connected to the rear part of the pipeline robot B101 after penetrating out through the resistance wire penetrating port; the first servo motor 103, the second servo motor 104 and the driving motor are all in data connection with the control unit 11;
a cleaning sleeve 34 is fixed at the penetration opening of the resistance wire, and a scale storage bin 35 positioned below the cleaning sleeve 34 is fixed on the plugging plate 13 positioned at the front side.
The sub-power device 10 comprises a mounting box 36, and the mounting box 36 is detachably connected with the rear part of the pipeline robot B101 through an electromagnet; third electric telescopic rods 37 are symmetrically arranged at the upper part and the lower part of the mounting box 36, the push rod parts of the third electric telescopic rods 37 outwards penetrate through the box wall of the mounting box 36, and high-temperature-resistant rubber sleeves 38 are sleeved at the push rod parts of the third electric telescopic rods 37; two groups of spiral propelling pieces are arranged in the mounting box 36, each spiral propelling piece comprises a third servo motor 39 and a threaded sleeve 40, the center line of each threaded sleeve 40 is arranged along the front-back direction, two ends of each threaded sleeve 40 are respectively and rotatably connected to the mounting box 36 through bearings, a driven gear is arranged on the outer wall of each threaded sleeve 40, a main gear is arranged on a main shaft of each third servo motor 39 and meshed with the driven gear, the outer part of each composite spiral resistance wire 9 is of a threaded structure, and each composite spiral resistance wire 9 penetrates through the corresponding threaded sleeve 40 and is in threaded fit with the corresponding threaded sleeve 40; the third electric telescopic rod 37 and the third servo motor 39 are both in data connection with the ground control center 1;
the combined type spiral resistance wire 9 is formed by winding a resistance wire 41 and a tensile wire 42 mutually, and the outer wall of the combined type spiral resistance wire 9 is provided with a metal ceramic coating.
Two adjacent groups of hollow pipeline robot groups are connected through three groups of electromagnetic butt joint devices, each group of electromagnetic butt joint devices comprises an elastic connector 43, a butt joint groove 44, a locking motor 45 and a mechanical lock shaft 46, the rear end of the elastic connector 43 is fixed on the plugging plate 13 on the front side of the pipeline robot B101, a butt joint 47 is installed at the front end of the elastic connector 43, and an electromagnetic coil A48 connected with the butt joint 47 is arranged at the front end of the elastic connector 43; the butt joint groove 44 is arranged at the front end of the containing cavity of the pipeline robot A100, the electromagnetic coil B49 is arranged at the rear end of the butt joint groove 44, the mechanical lock shaft 46 is arranged at the front end of the butt joint groove 44, the locking motor 45 is arranged at the front end of the containing cavity, and the locking motor 45 is connected with the mechanical lock shaft 46; the elastic connector 43 is inserted into the docking groove 44;
the lock motor 45 and solenoid B49 are in data communication with the control unit 11 in the pipeline robot A100, and solenoid A48 is in data communication with the control unit 11 in the pipeline robot B101.
The concrete process of the third step is as follows:
(1) the control unit 11 for controlling the pipeline robot A100 and the control unit 11 for controlling the pipeline robot B101 through the ground control center 1, the control unit 11 simultaneously starts two groups of resistance wire winding devices of the pipeline robot A100, so that a driving motor drives a resistance wire winding drum 33 to rotate, a first servo motor 103 drives a straightener 31 to transmit, a second servo motor 104 drives a winding guide disc 32 to rotate, and under the double traction of the straightener 31 and the winding guide disc 32, a composite spiral resistance wire 9 on the resistance wire winding drum 33 slowly penetrates out of a resistance wire penetrating opening;
at the same time, the control unit 11 moves the pipeline robot B101 forward by activating the traveling mechanism 16 of the pipeline robot B101, and reaches 1/2L when the traveling mechanism reaches 1/2L1When in position, the sub-power device 10 is fixed on the wall of the coal bed methane thermal recovery channel 8;
(2) the sub-power device 10 is started, so that the sub-power device 10 forms a propelling force on the composite spiral resistance wire 9, and the pipeline robot B101 continues to move forwards under the driving of the walking mechanism 16;
(3) reaches L by the pipeline robot B1011When the position is detected, the elastic connector 43 on the pipeline robot B101 is popped up and inserted into the butt joint groove 44 of the pipeline robot A100 of the front group of hollow pipeline robot groups, the locking motor 45 is started, the mechanical lock shaft 46 locks the butt joint 47, the electromagnetic coil A48 and the electromagnetic coil B49 are mutually attracted after being electrified, so that the butt joint process of the hollow pipeline robot groups and the front group of hollow pipeline robot groups is completed, under the double traction of the pipeline robot B101 and the sub-power device 10, the combined type spiral resistance wire 9 on the resistance wire winding drum 33 in the pipeline robot A100 is completely pulled out.
In the step (1), the step of driving the pipeline robot B101 to move forward by the traveling mechanism 16 is as follows: starting all the first electric telescopic rods 27, supporting the crawler belt 23 on the wall of the coalbed methane thermal recovery channel 8 after the first electric telescopic rods 27 are extended, then driving one of the supporting wheels 24 to rotate by the driving device 21, so that the supporting wheel 24 drives the crawler belt 23 to move along the wall of the coalbed methane thermal recovery channel 8, and finally, the pipeline robot B101 walks forwards under the driving of the crawler belt 23;
the steps of fixing the sub-power device 10 on the wall of the coal bed methane thermal recovery channel 8 are as follows: starting all the third electric telescopic rods 37, and supporting the third electric telescopic rods 37 on the wall of the laminar gas thermal recovery channel after the third electric telescopic rods 37 extend to finish the fixation of the sub-power device 10;
step (2) the step that the neutron power device 10 forms the propulsive force to the combined type spiral resistance wire 9 is: and starting a third servo motor 39 of the two groups of spiral propelling pieces, wherein the third servo motor 39 drives a threaded sleeve 40 to rotate through a main gear and a slave gear, and the threaded sleeve 40 is in threaded fit with the composite spiral resistance wire 9, so that the threaded sleeve 40 rotates to form forward propelling force on the composite spiral resistance wire 9.
Step four is fixed in the 8 walls of coal bed gas thermal recovery passageway with cavity formula pipeline robot group of every group to seal the space between cavity formula pipeline robot group and the 8 walls of coal bed gas thermal recovery passageway, make the concrete process that cavity formula pipeline robot group of every group formed the space sealed relatively in 8 walls of coal bed gas thermal recovery passageway does: starting all the fixed anchor rods 28 and 17 of the pipeline robot A100 and the pipeline robot B101 of the hollow pipeline robot group, extending the second electric telescopic rod 30, jacking the fixed anchor rods 28 outwards, and then starting and supporting the fixed anchor rods 28 on the wall of the coalbed methane thermal recovery channel 8;
then starting all airbag inflating mechanisms of a pipeline robot A100 and a pipeline robot B101 of the hollow pipeline robot group, igniting an igniter to generate a large amount of heat, heating sodium azide to immediately decompose and release nitrogen, inflating the nitrogen into the inner cavity of the high-temperature-resistant rubber airbag 15 from an inflating hole, inflating the high-temperature-resistant rubber airbag 15, expanding and supporting the high-temperature-resistant rubber airbag 15 on the wall of the coalbed methane thermal recovery channel 8, finally sealing a gap between the hollow pipeline robot group and the wall of the coalbed methane thermal recovery channel 8 by the high-temperature-resistant rubber airbag 15, and finally starting the electric valve 19 to close the cylindrical pipeline 14.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (7)
1. The heating method special for coal bed gas thermal recovery is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps that firstly, the length of a coal seam to be thermally mined is L, a ground control center, a generator and a ground wire winding vehicle are arranged on the ground above the coal seam, wherein an intelligent cable winch is arranged on the ground wire winding vehicle, a high-temperature-resistant tensile cable is wound on the intelligent cable winch, and a first tension sensor is arranged at a wire outlet end of the intelligent cable winch; n groups of hollow pipeline robot groups are assembled, one end of a high-temperature-resistant tensile cable is connected with the generator, and the other end of the high-temperature-resistant tensile cable is connected with the rearmost hollow pipeline robot group; the intelligent cable winch, the first tension sensor, the generator and all the hollow pipeline robot groups are respectively connected with the ground control center through control lines;
step two, in proper order with every hollow pipeline robot group of group send to the assigned position of coal bed gas thermal recovery passageway, n hollow pipeline robot groups of group set up side by side at interval this moment, and the distance between two sets of adjacent hollow pipeline robot groups is L1，L1=L/n；
Step three, starting each group of hollow pipeline robot groups to enable the hollow pipeline robot groups to be in butt joint with a group of hollow pipeline robot groups in front through an electromagnetic butt joint device, and at the moment, completely stretching out the combined type spiral resistance wires in each group of hollow pipeline robot groups;
fixing each group of hollow pipeline robot groups in the wall of the coalbed methane thermal recovery channel, and sealing a gap between each group of hollow pipeline robot groups and the wall of the coalbed methane thermal recovery channel so that each group of hollow pipeline robot groups forms a relatively sealed space in the coalbed methane thermal recovery channel;
step five, starting a generator, wherein the generator is electrically connected with the combined type spiral resistance wires of all the hollow pipeline robot groups through high-temperature-resistant tensile cables, the generator provides electric energy required by heating the resistance wires, and water heated by the resistance wires generates large pressure and is pressed into a coal seam;
step six, after the heating work is finished, the generator is turned off, the electromagnetic butt joint device is operated, the hollow pipeline robot groups are separated from one group of hollow pipeline robot groups in front, then the combined type spiral resistance wires of each group of hollow pipeline robot groups are withdrawn, and all the hollow pipeline robot groups are withdrawn from the coal bed methane thermal recovery channel to the ground;
the hollow pipeline robot set comprises a pipeline robot A, a pipeline robot B and a sub-power device, wherein the pipeline robot A and the pipeline robot B are connected through two combined spiral resistance wires, the two combined spiral resistance wires penetrate through the sub-power device, the sub-power device is detachably connected to the rear part of the pipeline robot B, and the two combined spiral resistance wires are all stored in the pipeline robot A;
the pipeline robot A comprises a pipeline machine device and two groups of resistance wire coiling devices;
the pipeline machine device comprises a control unit and a cylindrical shell, wherein two ends of the shell are respectively plugged by plugging plates, a round hole is formed in each plugging plate, a cylindrical pipeline is fixed in the shell, and two ends of the cylindrical pipeline are respectively fixed at the round holes of the two plugging plates; the periphery of two end parts of the shell is provided with a high-temperature resistant rubber air bag group, the high-temperature resistant rubber air bag group consists of a plurality of high-temperature resistant rubber air bags, the plurality of high-temperature resistant rubber air bags are arranged in an annular array along the circumferential direction of the shell, an independent installation cavity is arranged in each high-temperature resistant rubber air bag, an air bag inflating mechanism is arranged in each installation cavity, and an automatic exhaust valve is arranged on each high-temperature resistant rubber air bag; a plurality of groups of travelling mechanisms and a plurality of groups of fixed anchor rod pieces are arranged on the periphery of the shell, the travelling mechanisms are arranged side by side at intervals along the circumferential direction of the shell, the fixed anchor rod pieces are arranged side by side at intervals along the circumferential direction of the shell, and each group of fixed anchor rod pieces are positioned between two adjacent groups of travelling mechanisms; a temperature sensor is arranged on the plugging plate positioned at the front side, a positioning sensor is arranged on the inner wall of the shell, and an electric valve is arranged in the middle of the cylinder pipeline; the control unit is respectively in data connection with the positioning sensor, the temperature sensor, the automatic exhaust valve, the electric valve, the air bag inflating mechanism, the travelling mechanism, the fixed anchor rod piece and the ground control center;
a containing cavity is formed between the inner wall of the shell of the pipeline machine device and the outer wall of the cylindrical pipeline, and the two groups of resistance wire coiling devices are symmetrically positioned in the containing cavity;
the pipe robot B has the same structure as the pipe machine apparatus.
2. The heating method special for coal bed methane thermal recovery according to claim 1, characterized by comprising the following steps: the air bag inflating mechanism comprises an igniter, an igniter and sodium azide, and an inflating hole communicated with the inner cavity of the high-temperature resistant rubber air bag is formed in the mounting cavity; the igniter is in data connection with the control unit;
the walking mechanism comprises a driving device and crawler wheels, each crawler wheel consists of a crawler and a plurality of supporting wheels, the crawler is positioned on the outer sides of the plurality of supporting wheels and is in a tensioning state, two ends of a wheel shaft of each supporting wheel are connected to the shell through telescopic connecting pieces respectively, each telescopic connecting piece comprises an upper connecting rod and a lower connecting rod, the lower end of each lower connecting rod is hinged to the side wall of the shell, the upper end of each upper connecting rod is hinged to the end part of the wheel shaft of each supporting wheel, the lower end of each upper connecting rod is hinged to the upper end of each lower connecting rod, and a first electric telescopic rod is hinged between the middle part of each lower connecting rod and the middle part of each upper connecting rod; the driving device is in transmission connection with one of the supporting wheels, and the control unit is in data connection with the driving device and all the first electric telescopic rods;
the fixed anchor rod piece comprises a fixed anchor rod and an installation frame, the fixed anchor rod is of an electric cylinder structure, the lower end of the fixed anchor rod is hinged to the installation frame, and a second electric telescopic rod is hinged between the lower part of the fixed anchor rod and the installation frame; the control unit is in data connection with the fixed anchor rod and the second electric telescopic rod;
the resistance wire winding device comprises a straightener, a winding guide disc, a driving motor and a resistance wire winding drum, the resistance wire winding drum is rotatably connected in a storage cavity, the straightener and the winding guide disc are both arranged in the storage cavity and positioned at the front end of the resistance wire winding drum, a first servo motor and a second servo motor are also arranged in the storage cavity, the first servo motor is in transmission connection with one wheel of the straightener, the second servo motor is in transmission connection with the winding guide disc, and the driving motor is in transmission connection with the resistance wire winding drum;
a resistance wire penetrating opening is formed in the plugging plate positioned on the front side, the composite spiral resistance wire is wound on a resistance wire winding drum, and the movable end of the composite spiral resistance wire sequentially passes through a winding guide disc and a straightener and then penetrates out of the resistance wire penetrating opening; the movable end of the combined spiral resistance wire penetrates out of the resistance wire penetrating port and then is connected to the rear part of the pipeline robot B; the first servo motor, the second servo motor and the driving motor are in data connection with the control unit;
a cleaning sleeve is fixed at the penetration opening of the resistance wire, and an incrustation scale storage bin positioned below the cleaning sleeve is fixed on the plugging plate positioned at the front side.
3. The heating method special for coal bed methane thermal recovery according to claim 2, characterized by comprising the following steps: the sub-power device comprises a mounting box, and the mounting box is detachably connected with the rear part of the pipeline robot B through an electromagnet; third electric telescopic rods are symmetrically arranged at the upper part and the lower part of the mounting box, a push rod part of each third electric telescopic rod penetrates out of the wall of the mounting box, and a high-temperature-resistant rubber sleeve is sleeved at a push rod part of each third electric telescopic rod; two groups of spiral propelling pieces are arranged in the mounting box, each spiral propelling piece comprises a third servo motor and a threaded sleeve, the center line of each threaded sleeve is arranged along the front-back direction, two ends of each threaded sleeve are respectively and rotatably connected to the mounting box through bearings, a driven gear is arranged on the outer wall of each threaded sleeve, a main gear is arranged on a main shaft of each third servo motor and meshed with the driven gear, a threaded structure is arranged outside the combined type spiral resistance wire, and the combined type spiral resistance wire penetrates through the threaded sleeves and is in threaded fit with the threaded sleeves; the third electric telescopic rod and the third servo motor are both in data connection with the ground control center;
the combined type spiral resistance wire is formed by mutually winding a resistance wire and a tensile wire, and the outer wall of the combined type spiral resistance wire is provided with a metal ceramic coating.
4. The heating method special for coal bed methane thermal recovery according to claim 3, characterized by comprising the following steps: the two adjacent groups of hollow pipeline robot groups are connected through three groups of electromagnetic butt joint devices, each group of electromagnetic butt joint devices comprises an elastic connector, a butt joint groove, a locking motor and a mechanical lock shaft, the rear end of the elastic connector is fixed on a plugging plate on the front side of the pipeline robot B, a butt joint is installed at the front end of the elastic connector, and an electromagnetic coil A connected with the butt joint is arranged at the front end of the elastic connector; the butt joint groove is arranged at the front end of a containing cavity of the pipeline robot A, the electromagnetic coil B is arranged at the rear end of the butt joint groove, the mechanical lock shaft is arranged at the front end of the butt joint groove, the locking motor is arranged at the front end of the containing cavity, and the locking motor is connected with the mechanical lock shaft; the elastic connector is inserted in the butt-joint groove;
the locking motor and the electromagnetic coil B are in data connection with a control unit in the pipeline robot A, and the electromagnetic coil A is in data connection with the control unit in the pipeline robot B.
5. The heating method special for coal bed methane thermal recovery according to claim 4, characterized by comprising the following steps: the concrete process of the third step is as follows:
(1) the control unit controls the control unit of the pipeline robot A and the control unit of the pipeline robot B through the ground control center, the control unit simultaneously starts two groups of resistance wire winding devices of the pipeline robot A, so that the driving motor drives the resistance wire winding drum to rotate, the first servo motor drives the straightener to transmit, the second servo motor drives the winding guide disc to rotate, and the combined type spiral resistance wire on the resistance wire winding drum slowly penetrates out of the resistance wire through opening under the double traction of the straightener and the winding guide disc;
at the same time, the control unit moves the pipeline robot B forward by activating the traveling mechanism of the pipeline robot B, and reaches 1/2L when the traveling mechanism reaches 1/2L1When the position is determined, the sub-power device is fixed on the wall of the coal bed gas thermal recovery channel;
(2) the sub-power device forms a propelling force to the composite spiral resistance wire, and the pipeline robot B continues to move forward under the driving of the walking mechanism;
(3) reaches L by the robot B in the pipeline1When in position, the elastic connector on the pipeline robot B is ejected and inserted into a group of hollow pipes in frontIn the pipeline robot A's of way robot group butt joint recess, start locking motor, mechanical lock axle locking butt joint, solenoid A and solenoid B attract after getting electricity, accomplish the butt joint process of a set of cavity formula pipeline robot group in cavity formula pipeline robot group and the place ahead so far, under the dual traction of pipeline robot B and sub-power device, combined type spiral resistance wire on the resistance wire reel in the pipeline robot A is pulled out completely.
6. The heating method special for coal bed methane thermal recovery according to claim 5, characterized by comprising the following steps: the step (1) of driving the pipeline robot B to walk forwards by the walking mechanism comprises the following steps: starting all the first electric telescopic rods, supporting the crawler on the wall of the coalbed methane thermal recovery channel after the first electric telescopic rods are extended, and then driving one of the supporting wheels to rotate by the driving device, so that the supporting wheels drive the crawler to move along the wall of the coalbed methane thermal recovery channel, and finally, the pipeline robot B walks forwards under the driving of the crawler;
the method for fixing the sub-power device on the wall of the coal bed gas thermal recovery channel comprises the following steps: starting all the third electric telescopic rods, and supporting the third electric telescopic rods on the wall of the laminar gas thermal recovery channel after the third electric telescopic rods extend to finish the fixation of the sub-power device;
the step (2) of forming the propelling force to the composite spiral resistance wire by the neutron power device comprises the following steps: and starting a third servo motor of the two groups of spiral propelling pieces, wherein the third servo motor drives the threaded sleeve to rotate through the main gear and the driven gear, and the threaded sleeve is in threaded fit with the combined spiral resistance wire, so that the forward propelling force is formed on the combined spiral resistance wire after the threaded sleeve rotates.
7. The heating method special for coal bed methane thermal recovery according to claim 6, characterized by comprising the following steps: step four is fixed in the hot channel wall of adopting of coal bed gas with every hollow pipeline robot group of group to seal the hollow pipeline robot group and the hot space of adopting between the channel wall of adopting of coal bed gas, make every hollow pipeline robot group of group form the concrete process in the hot channel wall of adopting of coal bed gas in the relatively sealed space and be: starting all fixing anchor rod pieces of a pipeline robot A and a pipeline robot B of the hollow pipeline robot group, extending the second electric telescopic rod, jacking the fixing anchor rods outwards, and then starting and supporting the fixing anchor rods on the wall of the coalbed methane thermal recovery channel;
and then starting all airbag inflating mechanisms of the pipeline robot A and the pipeline robot B of the hollow pipeline robot group, igniting an igniter to generate a large amount of heat, heating the sodium azide to immediately decompose and release nitrogen, inflating the nitrogen into the inner cavity of the high-temperature-resistant rubber airbag from the inflating hole, inflating the high-temperature-resistant rubber airbag to expand and support the high-temperature-resistant rubber airbag on the wall of the coalbed methane thermal recovery channel, finally closing a gap between the hollow pipeline robot group and the wall of the coalbed methane thermal recovery channel by the high-temperature-resistant rubber airbag, and finally starting the electric valve to close the cylindrical pipeline.
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| US10301912B2 (en) * | 2008-08-20 | 2019-05-28 | Foro Energy, Inc. | High power laser flow assurance systems, tools and methods |
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| CN105923467A (en) * | 2016-05-25 | 2016-09-07 | 南京安透可智能系统有限公司 | Intelligent cable capstan device |
| CN106223916A (en) * | 2016-10-14 | 2016-12-14 | 中国地质大学（北京） | Resistance wire type coal seam heater |
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| RU185663U1 (en) * | 2018-06-28 | 2018-12-14 | Общество с ограниченной ответственностью "МАЛТА" (ООО "МАЛТА") | Device for cleaning the inner surface of pipes of oil pipelines |
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