CN109630023B - Method for laying horizontal pipeline in weak stratum and ground direction adjusting device - Google Patents
Method for laying horizontal pipeline in weak stratum and ground direction adjusting device Download PDFInfo
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- CN109630023B CN109630023B CN201811461051.9A CN201811461051A CN109630023B CN 109630023 B CN109630023 B CN 109630023B CN 201811461051 A CN201811461051 A CN 201811461051A CN 109630023 B CN109630023 B CN 109630023B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 81
- 239000003245 coal Substances 0.000 claims abstract description 30
- 239000011435 rock Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 239000003345 natural gas Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The ground direction adjusting device comprises an outer sleeve, an inner sleeve and a weight reducing assembly; the outer sleeve is movably sleeved outside the inner sleeve, and the outer sleeve and the inner sleeve can slide relatively and can not rotate relatively; the recombination-reducing member is mounted in the inner bore of the inner sleeve. A method for laying horizontal pipelines in weak strata by using a ground direction-adjusting device comprises the following steps: 1, well drilling; 2, placing a wellhead sleeve; 3, placing the outer sleeve; 4, placing the inner sleeve and completing power connection of the drilling machine; 5, locking the drilling azimuth; 6, drilling to a target layer; and 7, laying pipelines. The device and the method provided by the invention can be used for horizontally laying the pipeline in the weak and broken stratum, so that the coal bed gas can be extracted effectively in the coal bed, the excellent energy source is effectively utilized, the negative influence of the greenhouse effect caused by direct discharge of the excellent energy source is avoided, and the probability of gas accidents in coal mine exploitation is reduced.
Description
Technical Field
The invention relates to the technical field of geological exploration, in particular to a method for laying a horizontal pipeline in a weak stratum and a ground direction adjusting device.
Background
Coalbed methane is unconventional natural gas which is stored in coal and coal rock and is associated with the coal, commonly called mine gas, the gas composition and the application range of the coalbed methane are the same as those of petroleum and natural gas, and the main component of the coalbed methane is methane, so that the coalbed methane is a very clean high-quality fuel. The heat value of the 1m 3 pure coal bed gas is equivalent to 1.13kg of gasoline or 1.21kg of standard coal, the heat value of the pure coal bed gas is equivalent to that of natural gas, the pure coal bed gas can be mixed with natural gas, and the pure coal bed gas is clean after combustion, hardly generates any waste gas, and is superior industrial, chemical, power generation and resident life fuel.
Coal bed gas is a very high-quality energy source and is also a greenhouse gas which can cause serious consequences, the greenhouse effect is about 21 times of that of CO 2, and since coal resources are developed and utilized by human beings, the coal bed gas is regarded as terrible gas which is a serious threat to coal mine safety, and is usually intensively discharged into the atmosphere because of gas accidents.
If the pipeline can be arranged in the coal bed to extract the coal bed gas before the coal bed is mined, the excellent energy is effectively utilized, the negative influence of the greenhouse effect caused by direct emission of the excellent energy is avoided, and the probability of gas accidents in coal mining is reduced. Unfortunately, in the geological exploration field, a method and a corresponding device for laying horizontal direction pipelines in weak stratum or coal seam are not available at present, only laying vertical direction pipelines in the coal seam can be realized, and extracted coal seam gas is very limited and has no popularization and utilization value.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a method for laying a horizontal pipeline in a weak stratum and a ground direction adjusting device, which solve the problem that coal bed gas in the existing coal bed cannot be effectively extracted.
The technical scheme of the invention is as follows: the ground direction adjusting device comprises an outer sleeve, an inner sleeve and a weight reducing assembly; the outer sleeve is movably sleeved outside the inner sleeve, and the outer sleeve and the inner sleeve can slide relatively and can not rotate relatively; the weight reducing component is arranged in the inner hole of the inner sleeve and comprises a plane thrust bearing and a joint; the joint is movably arranged in an inner hole of the inner sleeve through a plane thrust bearing, the joint and the inner sleeve can rotate relatively, one end of the joint is a power end of the drilling machine, and the other end of the joint is a drill rod output end.
The invention further adopts the technical scheme that: the inner wall of the outer sleeve is provided with an axially extending guide rib; the outer wall of the inner sleeve is provided with a chute matched with the guide edge of the outer sleeve, the inner sleeve is movably arranged in the inner hole of the outer sleeve, and the chute is in sliding fit with the guide edge of the outer sleeve.
The invention further adopts the technical scheme that: the joint is sleeve-shaped with two open ends, and internal threads are arranged at the power end of the drilling machine and the output end of the drill rod.
The technical scheme of the invention is as follows: a method for laying horizontal pipelines in weak strata by using a ground direction-adjusting device comprises the following steps:
s01, well digging: drilling a well downwards to a complete rock mass part on the ground by using a drilling machine;
S02, placing a wellhead sleeve: placing a well head sleeve prepared in advance in the drilled well, enabling the lower end of the well head sleeve to be in contact with a rock mass, and then pouring cement slurry between the outer wall of the well head sleeve and a well wall, so that the well head sleeve is fixedly connected with the rock mass;
s03, placing an outer sleeve: the outer sleeve is placed in the wellhead sleeve, the outer sleeve is directly or indirectly borne on the wellhead sleeve, and the outer sleeve and the wellhead sleeve are temporarily not fixed;
S04, placing an inner sleeve and completing power connection of the drilling machine: the method comprises the steps that an inner sleeve is arranged in an inner hole of an outer sleeve, the inner sleeve and the outer sleeve form sliding fit through matching of a sliding groove and a guide edge, a drill rod, a drilling tool and a drill bit are connected to the output end of the drill rod of a joint, the joint connected with the drill rod is arranged in the inner hole of the inner sleeve through a plane thrust bearing, and finally a power output piece of a drilling machine is connected to the power end of the drilling machine of the joint;
S05, locking drilling azimuth: firstly, rotating the outer sleeve to a set drilling azimuth angle, and then fixedly connecting the outer sleeve with a wellhead sleeve, so that the drilling azimuth angle is locked;
S06, drilling to a target layer: starting the drilling machine to drill, transmitting the power of the drilling machine to a drill bit through a power output part, a joint, a drill rod and a drilling tool, driving the drill bit to drill, in the drilling process, downwards descending the inner sleeve and the weight reducing part along the axial direction of the outer sleeve together, suspending drilling after drilling to a certain depth, taking the drilling depth as the criterion that the inner sleeve does not separate from the inner hole of the outer sleeve, lifting the inner sleeve and the weight reducing part along the inner hole of the outer sleeve until the inner sleeve is completely separated from the outer sleeve and is positioned above a wellhead, then disconnecting the connection between two adjacent drill rod sections at the lower end of the weight reducing component, adding a new drill rod section between the disconnected two adjacent drill rod sections to prolong the length of the drill rod, connecting the drill rod sleeve section at the lower end of the inner sleeve, wherein the newly added drill rod sleeve section is suitable for the length of the newly added drill rod section, then the inner sleeve and the weight reducing component are assembled back into the inner hole of the outer sleeve, drilling is continuously started to a certain depth, drilling is stopped, the drilling depth is based on that the inner sleeve is not separated from the inner hole of the outer sleeve, the inner sleeve and the weight reducing component are lifted up along the inner hole of the outer sleeve until the inner sleeve is completely separated from the outer sleeve and positioned above a wellhead, then connection between two adjacent drill rod sections at the lower end of the weight reducing component is disconnected, a new drill rod section is added between the disconnected two adjacent drill rod sections to prolong the length of a drill rod, connection between the inner sleeve and the drill rod sleeve sections is disconnected, then a new drill rod sleeve section is added between the inner sleeve and the drill rod sleeve section to prolong the length of the drill rod sleeve, the newly added drill rod sleeve section is matched with the newly added drill rod section length, the inner sleeve and the weight reducing component are assembled back into the inner hole of the outer sleeve, continuously starting the drilling machine to drill; repeating the steps of installing the drill rod section and the drill rod sleeve section until the drill bit reaches a target layer;
in the step, the drill rod sleeve can only reciprocate along the axial direction, and after the drilling azimuth is locked, the drill rod sleeve plays roles in wellhead orientation and guiding;
S07, laying a pipeline: all drill pipe sleeve sections which are designed to be placed in the weak stratum horizontal section are connected end to end through left-handed threads, all drill pipe sleeve sections which are not placed in the weak stratum horizontal section are connected end to end through right-handed threads, and two sections of drill pipe sleeves are connected through positive and negative threaded connectors; after the drilling reaches a target layer, torque is applied to the whole drill rod sleeve on the ground, so that the two sections of drill rod sleeves are separated at the positive and negative threaded joints, the upper section of drill rod sleeve is taken out from a wellhead, then torque is applied to the whole drill rod on the ground, so that drill rod sections are separated, the drill rod sections are taken out, and the lower section of drill rod sleeve is left in the horizontal section designed to be placed in a weak stratum;
in the step, one end of the front and back threaded joint is provided with a left-handed thread, the other end of the front and back threaded joint is provided with a right-handed thread, the front and back threaded joint is connected with a section of drill pipe sleeve which is placed in the horizontal section of the weak stratum through the left-handed thread, and is connected with a section of drill pipe sleeve which is not placed in the horizontal section of the weak stratum through the right-handed thread.
The invention further adopts the technical scheme that: the wellhead sleeve is provided with a flange plate A at one end close to the ground; the flange plate A is provided with a bolt hole; one end of the outer sleeve is provided with a flange plate B, and an arc waist hole is formed in the flange plate B; the outer sleeve can be borne on the flange plate A of the wellhead sleeve through the flange plate B, and the arc waist holes on the flange plate B are opposite to the bolt holes on the flange plate A.
The invention further adopts the technical scheme that: the lower end and the middle part of the lower section of the drill pipe sleeve are provided with a plurality of ventilation holes, and the ventilation holes can allow coal bed gas to enter the inner cavity of the drill pipe sleeve.
The invention further adopts the technical scheme that: all drill pipe casing sections of the drill pipe casing have the same outer diameter.
Compared with the prior art, the invention has the following advantages:
The device and the method provided by the invention can be used for horizontally laying the pipeline in the weak and broken stratum, so that the coal bed gas can be extracted effectively in the coal bed, the excellent energy source is effectively utilized, the negative influence of the greenhouse effect caused by direct discharge of the excellent energy source is avoided, and the probability of gas accidents in coal mine exploitation is reduced.
The invention is further described below with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic view of a ground steering apparatus;
FIG. 2 is a schematic structural view of an outer sleeve;
FIG. 3 is a schematic structural view of an inner sleeve;
FIG. 4 is a schematic representation of a method of laying horizontal tubing in a weak formation at step S04;
Fig. 5 is a schematic diagram of a method of laying horizontal tubing in a weak formation at step S06.
Detailed Description
Example 1:
As shown in fig. 1-3, the ground steering device comprises an outer sleeve 1, an inner sleeve 2 and a weight-reducing component.
An axially extending guide rib 11 is provided in the inner wall of the outer sleeve 1. The outer wall of the inner sleeve 2 is provided with a chute 21 matched with the guide edge 11 of the outer sleeve 1, the inner sleeve 2 is movably arranged in the inner hole of the outer sleeve 1, and the chute 21 is in sliding fit with the guide edge 11 of the outer sleeve 1. The outer sleeve 1 and the inner sleeve 2 can slide relatively and can not rotate relatively.
The weight reducing assembly is arranged in the inner hole of the inner sleeve 2 and comprises a plane thrust bearing 31 and a joint 32; the joint 32 is sleeve-shaped with two open ends, the joint 32 is movably arranged in an inner hole of the inner sleeve 2 through a plane thrust bearing 31, the joint and the inner sleeve 2 can rotate relatively, one end of the joint 32 is a power end of a drilling machine, the other end of the joint 32 is an output end of a drilling rod, and the joint 32 is provided with internal threads at the power end of the drilling machine and the output end of the drilling rod.
Brief description of the invention application:
As shown in fig. 4-5, a method for laying horizontal pipes in a horizontal section of a weak (fractured) formation, using the surface steering device, comprises the following steps:
S01, well digging: the drill 4 is used to drill a well down to the complete rock mass 101 section at the surface.
S02, placing a wellhead sleeve: the well head sleeve 5 prepared in advance is placed in the drilled well, the lower end of the well head sleeve 5 is contacted with the rock mass 101, and cement slurry 102 is poured between the outer wall of the well head sleeve 5 and the well wall, so that the well head sleeve 5 is fixedly connected with the rock mass 101.
S03, placing an outer sleeve: the outer sleeve 1 is placed in the wellhead sleeve 5, the outer sleeve 1 is directly or indirectly borne on the wellhead sleeve 5, and the outer sleeve 1 and the wellhead sleeve 5 are temporarily not fixed.
S04, placing an inner sleeve and completing power connection of the drilling machine: the inner sleeve 2 is arranged in the inner hole of the outer sleeve 1, the inner sleeve 2 and the outer sleeve 1 form sliding fit through the matching of the sliding groove 21 and the guide rib 11, a drill rod 41, a drilling tool 42 and a drill bit 43 are connected to the drill rod output end of the joint 32, the joint 32 connected with the drill rod 41 is arranged in the inner hole of the inner sleeve 2 through the plane thrust bearing 31, and finally the power output piece 44 of the drilling machine 4 is connected to the drilling machine power end of the joint 32.
S05, locking drilling azimuth: the outer sleeve 1 is rotated to a set drilling azimuth angle, and then the outer sleeve 1 is fixedly connected with the wellhead sleeve 5, so that the drilling azimuth angle is locked.
S06, drilling to a target layer: starting the drilling machine 4 to drill, transmitting power of the drilling machine 4 to the drill bit 43 through the power output piece 44, the joint 32, the drill rod 41 and the drilling tool 42, driving the drill bit 43 to drill, in the drilling process, lowering the inner sleeve 2 and the weight reducing and combining piece together along the axial direction of the outer sleeve 1, then suspending the drilling after drilling to a certain depth, taking the inner sleeve 2 and the weight reducing and combining piece up along the inner hole of the outer sleeve 1 until the inner sleeve 2 and the outer sleeve 1 are completely separated and positioned above a wellhead, disconnecting the connection between the lower end of the weight reducing assembly and the adjacent drill rod section 411, adding a new drill rod section 411 between the disconnected adjacent drill rod section 411 to prolong the length of the drill rod 41, connecting the lower end of the inner sleeve 2 with the drill rod section 451, installing the inner sleeve 2 and the newly added drill rod section 451 back into the inner hole of the outer sleeve 1, continuing to start the drilling machine 4 to drill after drilling to a certain depth, suspending the drilling depth until the inner sleeve 2 and the inner sleeve 2 are not separated from the inner hole of the outer sleeve 1, completely separating the inner sleeve 2 and the inner sleeve 1 from the inner sleeve 1, completely connecting the weight reducing and combining piece 2 with the newly added drill rod section 411 between the disconnected from the two adjacent drill rod section 411, and the inner sleeve section 451 is completely connected with the inner sleeve 2, and the newly added into the newly added drill rod section 411, and the newly added drill rod section 411 is completely, and the newly added into the newly connected between the newly-cut drill rod section 1 is completely separated and the inner sleeve section 1, and the newly is completely separated into the inner sleeve section 1, and the newly is completely, and the newly connected into the inner sleeve section can be cut, and the newly is completely and the newly is cut and the inside and the newly is cut and the, the newly added drill rod sleeve segment 451 should be adapted to the length of the newly added drill rod segment 411, and then the inner sleeve 2 together with the weight reducing assembly is installed back into the inner bore of the outer sleeve 1, and the drill 4 is continued to be started for drilling. The above steps of installing section 411 and section 451 are repeated until the drill bit 43 drills to the target zone.
In this step, the drill pipe casing 45 can only reciprocate in the axial direction, and after the drilling azimuth is locked, the drill pipe casing 45 plays a role in wellhead orientation and guiding.
S07, laying a pipeline: all drill pipe sleeve sections 451 designed to be placed in the weak stratum horizontal section are connected end to end through left-handed threads, all drill pipe sleeve sections 451 not designed to be placed in the weak stratum horizontal section are connected end to end through right-handed threads, and two sections of drill pipe sleeves are connected through a positive and negative threaded connector 6. After the drilling reaches the target layer, torque is applied to the whole drill rod sleeve 45 on the ground, so that the two sections of drill rod sleeves are separated at the positive and negative threaded joints 6, the upper section of drill rod sleeve is taken out from the wellhead, then torque is applied to the whole drill rod 41 on the ground, the drill rod sections are separated, the drill rod sections are taken out, and the lower section of drill rod sleeve is left in the horizontal section designed to be placed in the weak stratum.
In this step, the front and back threaded joint 6 has a left-handed thread at one end and a right-handed thread at the other end, and the front and back threaded joint 6 is connected to a section of drill pipe casing in which the horizontal section of the weak stratum is placed through the left-handed thread and to a section of drill pipe casing in which the horizontal section of the weak stratum is not placed through the right-handed thread.
Preferably, the wellhead casing 5 is provided with a flange a51 at one end close to the ground. The flange plate a51 is provided with bolt holes. One end of the outer sleeve 1 is provided with a flange plate B12, and the flange plate B12 is provided with an arc waist hole. The outer sleeve 1 can be borne on the flange A51 of the wellhead sleeve 5 through the flange B12, and the arc waist holes on the flange B12 are opposite to the bolt holes on the flange A51. The outer sleeve 1 is fixed on the wellhead sleeve by connecting the flange plate A51 and the flange plate B12 through bolts.
Preferably, a plurality of ventilation holes are arranged at the lower end and the middle part of the lower section of the drill pipe sleeve 45, and the ventilation holes can allow coal bed gas to enter the inner cavity of the drill pipe sleeve 45.
Preferably, all of the drill rod sleeve segments 451 of the drill rod sleeve 45 have a uniform outer diameter.
Claims (5)
1. A method for laying horizontal pipelines in weak stratum, which is characterized in that a ground direction adjusting device is utilized;
The ground direction adjusting device comprises an outer sleeve (1), an inner sleeve (2) and a weight reducing assembly; the outer sleeve (1) is movably sleeved outside the inner sleeve (2), and the outer sleeve and the inner sleeve can slide relatively and can not rotate relatively; the weight reducing component is arranged in an inner hole of the inner sleeve (2) and comprises a plane thrust bearing (31) and a joint (32); the joint (32) is movably arranged in an inner hole of the inner sleeve (2) through a plane thrust bearing (31), the joint and the inner sleeve (2) can rotate relatively, one end of the joint (32) is a power end of a drilling machine, and the other end of the joint is a drill rod output end;
The inner wall of the outer sleeve (1) is provided with an axially extending guide rib (11); the outer wall of the inner sleeve (2) is provided with a chute (21) matched with the guide edge (11) of the outer sleeve (1), the inner sleeve (2) is movably arranged in the inner hole of the outer sleeve (1), and the chute (21) is in sliding fit with the guide edge (11) of the outer sleeve (1);
The method comprises the following steps:
s01, well digging: drilling a well down to a complete rock mass (101) section with a drilling machine (4) at the surface;
S02, placing a wellhead sleeve: placing a well head sleeve (5) prepared in advance in a drilled well, enabling the lower end of the well head sleeve (5) to be in contact with a rock mass (101), and then pouring cement slurry (102) between the outer wall of the well head sleeve (5) and a well wall, so that the well head sleeve (5) is fixedly connected with the rock mass (101);
S03, placing an outer sleeve: the outer sleeve (1) is placed into the wellhead sleeve (5), the outer sleeve (1) is directly or indirectly borne on the wellhead sleeve (5), and the outer sleeve and the wellhead sleeve are temporarily not fixed;
S04, placing an inner sleeve and completing power connection of the drilling machine: the method comprises the steps of installing an inner sleeve (2) in an inner hole of an outer sleeve (1), enabling the inner sleeve (2) and the outer sleeve (1) to form sliding fit with a guide rib (11) through a sliding groove (21), connecting a drill rod (41), a drilling tool (42) and a drill bit (43) on a drill rod output end of a joint (32), loading the joint (32) connected with the drill rod (41) into the inner hole of the inner sleeve (2) through a plane thrust bearing (31), and finally connecting a power output piece (44) of a drilling machine (4) on a drilling machine power end of the joint (32);
s05, locking drilling azimuth: firstly, rotating the outer sleeve (1) to a set drilling azimuth angle, and then fixedly connecting the outer sleeve (1) with the wellhead sleeve (5), so that the drilling azimuth angle is locked;
S06, drilling to a target layer: starting the drilling machine (4) to drill, transmitting the power of the drilling machine (4) to the drill bit (43) through the power output piece (44), the joint (32), the drill rod (41) and the drilling tool (42), driving the drill bit (43) to drill, in the drilling process, descending the inner sleeve (2) and the weight reducing piece together along the axial direction of the outer sleeve (1), suspending drilling after drilling to a certain depth, taking the drilling depth as the inner sleeve (2) not to separate from the inner hole of the outer sleeve (1), lifting the inner sleeve (2) and the weight reducing piece along the inner hole of the outer sleeve (1) until the inner sleeve (2) is completely separated from the outer sleeve (1) and is positioned above a wellhead, disconnecting the connection between two adjacent drill rod sections (411) at the lower end of the weight reducing assembly, adding a new drill rod section (411) between the disconnected two adjacent drill rod sections (411) to prolong the length of the drill rod (41), connecting the newly added drill rod section (451) at the lower end of the inner sleeve (2) with the newly added section (411), suspending the drilling depth until the newly added section (451) is matched with the length of the newly added section (411), continuing drilling until the drilling depth of the inner sleeve (2) is not to separate from the inner sleeve (1) until the drilling depth is not to separate from the inner hole (1) after the drilling depth of the inner sleeve (1), lifting the inner sleeve (2) and the weight reducing assembly along the inner hole of the outer sleeve (1) until the inner sleeve (2) is completely separated from the outer sleeve (1) and is positioned above a wellhead, then disconnecting the connection between two adjacent drill rod sections (411) at the lower end of the weight reducing assembly, adding a new drill rod section (411) between the disconnected two adjacent drill rod sections (411) to prolong the length of a drill rod (41), disconnecting the inner sleeve (2) and the drill rod sleeve section (451), then adding a new drill rod sleeve section (451) between the inner sleeve (2) and the drill rod sleeve section (451) to prolong the length of the drill rod sleeve (45), and then installing the newly added drill rod sleeve section (451) and the weight reducing assembly back into the inner hole of the outer sleeve (1) to continuously start the drilling machine (4) for drilling; repeating the steps of installing the drill rod section (411) and the drill rod sleeve section (451) until the drill bit (43) drills to reach a target layer;
In the step, the drill rod sleeve (45) can only reciprocate along the axial direction, and after the drilling azimuth is locked, the drill rod sleeve (45) plays roles in wellhead orientation and guiding;
S07, laying a pipeline: all drill pipe sleeve sections (451) which are designed to be placed in the weak stratum horizontal section are connected end to end through left-handed threads, all drill pipe sleeve sections (451) which are not designed to be placed in the weak stratum horizontal section are connected end to end through right-handed threads, and two sections of drill pipe sleeves are connected through a positive and negative threaded connector (6); after the drilling reaches a target layer, torque is applied to the whole drill rod sleeve (45) on the ground, so that the two sections of drill rod sleeves are separated at the positive and negative threaded joints (6), the upper section of drill rod sleeve is taken out from a wellhead, then torque is applied to the whole drill rod (41) on the ground, the drill rod sections are separated, the drill rod sections are taken out, and the lower section of drill rod sleeve is left in a horizontal section designed to be placed in a weak stratum;
in the step, one end of the front and back threaded joint (6) is provided with a left-handed thread, the other end of the front and back threaded joint is provided with a right-handed thread, the front and back threaded joint (6) is connected with a section of drill pipe sleeve which is placed in the horizontal section of the weak stratum through the left-handed thread, and is connected with a section of drill pipe sleeve which is not placed in the horizontal section of the weak stratum through the right-handed thread.
2. A method of laying horizontal tubing in a weak formation according to claim 1, wherein: the joint (32) is sleeve-shaped with two open ends, and the power end of the drilling machine and the output end of the drill rod are both provided with internal threads.
3. A method of laying horizontal tubing in a weak formation according to claim 2, wherein: a flange plate A (51) is arranged at one end of the wellhead sleeve (5) close to the ground; the flange plate A (51) is provided with a bolt hole; one end of the outer sleeve (1) is provided with a flange plate B (12), and the flange plate B (12) is provided with an arc waist hole; the outer sleeve (1) can be borne on a flange plate A (51) of the wellhead sleeve (5) through a flange plate B (12), and arc waist holes on the flange plate B (12) are opposite to bolt holes on the flange plate A (51).
4. A method of laying horizontal tubing in a weak formation according to claim 3, wherein: the lower end and the middle part of the lower section of the drill pipe sleeve (45) are provided with a plurality of ventilation holes, and the ventilation holes can allow coal bed gas to enter the inner cavity of the drill pipe sleeve (45).
5. A method of laying horizontal tubing in a weak formation according to claim 4, wherein: all drill rod sleeve segments (451) of the drill rod sleeve (45) have a uniform outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461051.9A CN109630023B (en) | 2018-12-01 | 2018-12-01 | Method for laying horizontal pipeline in weak stratum and ground direction adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461051.9A CN109630023B (en) | 2018-12-01 | 2018-12-01 | Method for laying horizontal pipeline in weak stratum and ground direction adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109630023A CN109630023A (en) | 2019-04-16 |
| CN109630023B true CN109630023B (en) | 2024-05-10 |
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| CN201811461051.9A Active CN109630023B (en) | 2018-12-01 | 2018-12-01 | Method for laying horizontal pipeline in weak stratum and ground direction adjusting device |
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|---|---|---|---|---|
| CN110206482B (en) * | 2019-06-20 | 2020-06-30 | 中国地质大学（北京） | Coal bed gas exploitation drilling equipment |
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