CN111764872A - Coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and construction method - Google Patents
Coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and construction method Download PDFInfo
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- CN111764872A CN111764872A CN202010644617.2A CN202010644617A CN111764872A CN 111764872 A CN111764872 A CN 111764872A CN 202010644617 A CN202010644617 A CN 202010644617A CN 111764872 A CN111764872 A CN 111764872A
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- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 claims 2
- 230000008602 contraction Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
-
- 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
- E21B7/046—Directional drilling horizontal drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to a flying pipe construction method, belongs to the field of underground coal mine drilling engineering and gas control engineering, and particularly relates to a flying pipe construction method for comb-shaped branch holes of a top plate and a bottom plate of an underground coal mine. The method comprises the following steps: the drill bit is an openable drill bit, and the rear end of the drill bit is connected with a drill rod; the flying pipe is provided with a suspension device, a solid pipe and a sieve pipe; wherein the flying pipe is used for being conveyed in the drill rod through water power and entering the drill hole through the drill bit capable of opening and closing. Therefore, the invention has the following advantages: (1) the problem of hole protection of the coal hole section of the comb-shaped branch hole of the top and bottom plates of the underground coal mine is solved, and efficient extraction of gas of the branch hole is ensured; (2) the problem of conveying depth measurement of the flying pipe in the drill rod is solved, and real-time conveying state and in-place condition of the flying pipe can be judged conveniently.
Description
Technical Field
The invention relates to a flying pipe construction method, belongs to the field of underground coal mine drilling engineering and gas control engineering, and particularly relates to a flying pipe construction method for comb-shaped branch holes of a top plate and a bottom plate of an underground coal mine.
Background
Along with the deep mining of coal mines in China, the proportion of high-gas soft coal seams is larger and larger, directional long drilling holes in bedding of the coal seam are constructed, the hole walls collapse due to the fact that coal is soft and cannot be formed, main holes are arranged in a top floor rock stratum of the coal seam, and branch holes penetrate through the coal seam to enter the coal seam to perform gas outburst elimination and pre-pumping, so that the method is one of effective methods for deep soft coal seam gas treatment. However, as the deep coal seam is broken more and more, the coal hole section of the branch hole is often collapsed due to the action of the softness of the coal seam and the ground stress, and the extraction effect of the branch hole is greatly influenced. From the practice of coal mine gas control, the screen pipe hole protection is an effective method for solving the problem of broken soft coal seam borehole collapse.
Therefore, a technical method for arranging the sieve tube in the comb-shaped drilling branch hole is urgently needed to be developed, the problem of hole protection of the comb-shaped drilling branch hole of the top plate and the bottom plate is solved, and efficient gas extraction is guaranteed.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
The invention mainly aims to solve the technical problems in the prior art and provides a coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and a construction method. The drilling tool and the construction method adopt the flying pipe hole protection and detect the penetration depth of the flying pipe in a sound wave mode, thereby effectively solving the problems of hole protection difficulty and measurement in the flying pipe construction process.
In order to solve the problems, the scheme of the invention is as follows:
a colliery is comby branch hole of roof bottom plate in pit and flies a tub construction drilling tool, includes:
the drill bit is an openable drill bit, and the rear end of the drill bit is connected with a drill rod;
the flying pipe is provided with a suspension device, a solid pipe and a sieve pipe;
wherein the flying pipe is used for being conveyed in the drill rod through water power and entering the drill hole through the drill bit capable of opening and closing.
Preferably, the coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool further comprises a sound wave receiver; the suspension device is provided with a jaw which is arranged to be clung to the inner wall of the drill rod and can stretch out and draw back under the action of torsional spring force; the sound wave receiver is used for sensing sound waves emitted by the fact that the clamping jaws are shrunk or flicked to knock the inner wall of the drill rod.
Preferably, the length of the solid pipe is not less than that of one drill pipe.
Preferably, the diameter of the solid pipe is larger than or equal to that of the sieve pipe and is smaller than the minimum inner diameter of a joint between adjacent drill pipes.
A coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction method comprises the following steps:
the flying pipe is conveyed in the drill stem through the drill bit which can be opened and closed by utilizing the water power so as to enter the drill hole.
Preferably, the method for constructing the flying pipe of the comb-shaped branch hole of the top and bottom plates of the underground coal mine comprises the following steps: a clamping jaw tightly attached to the inner wall of the drill rod is arranged on a suspension device of the flying pipe; receiving sound waves generated by knocking the drill rod due to the fact that the clamping jaws stretch and retract under the action of torsional spring force when penetrating through the drill rod joint; and judging the running-in depth of the flying pipe by using the sound wave sum and the length of a single drill rod.
Preferably, in the method for constructing the flying pipe of the comb-shaped branch hole of the top plate and the bottom plate of the underground coal mine, a comb-shaped directional drilling main hole of the bottom plate in a rock stratum of the bottom plate is constructed, the comb-shaped branch hole which extends from the bottom plate to the coal bed and is provided with a final hole at the top plate is constructed, and the flying pipe is put into the branch hole.
A coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction method comprises the following steps:
and 6, repeating the steps 1-5 until the flying pipe of the last branch hole is put in place.
Therefore, the invention has the following advantages:
(1) the problem of hole protection of the coal hole section of the comb-shaped branch hole of the top and bottom plates of the underground coal mine is solved, and efficient extraction of gas of the branch hole is ensured;
(2) the problem of conveying depth measurement of the flying pipe in the drill rod is solved, and real-time conveying state and in-place condition of the flying pipe can be judged conveniently.
Drawings
The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the disclosure.
Fig. 1 illustrates a schematic diagram of a monitoring principle of a pipe-in-flight transport acoustic wave in an embodiment of the invention;
FIG. 2 is a schematic view of a bottom plate comb-shaped branch hole bottom fly tube process;
FIG. 3 is a schematic diagram of a method of flight tube delivery operations;
embodiments of the present invention will be described with reference to the accompanying drawings.
Detailed Description
Examples
As shown in fig. 2, the comb-shaped branch hole flying pipe conveying device in the present embodiment is composed of a drilling tool 6, a flying pipe 5, a water closet 7, a water pump 8, a flying pipe conveying depth identification component 9, and the like. The drilling tool 6 consists of a drill bit 101 and a drill rod 102 which can be opened and closed, and the inner drift diameter of the connected drilling tool forms a hydraulic conveying channel of the flying pipe; the fly pipe 5 consists of a suspension device 201, a solid pipe 202 and a screen pipe 203, wherein the solid pipe 202 is a hollow pipe without a screen hole, the length of the hollow pipe is more than or equal to the length of one drill pipe 102, the diameter of the solid pipe 202 is more than or equal to the diameter of the screen pipe 203 and is simultaneously less than the minimum inner diameter of the joint of the drill pipe 102, an annular space gap of 1-3mm is kept between the solid pipe and the minimum inner diameter of the drill pipe 102 according to the requirement of conveying force, and the total length of the fly pipe 5 is determined according to the length of a guard hole of a branch hole 4; the flying pipe conveying depth recognition component 9 is composed of an acoustic wave receiver 301 and an acoustic wave analyzer 302, wherein the acoustic wave receiver 301 is responsible for receiving acoustic wave signals generated in the flying pipe hydraulic conveying process and transmitting the acoustic wave signals to the acoustic wave analyzer 302 for decoding and analyzing to output depth signals.
In this embodiment, the working principle of the flying pipe conveying depth recognition assembly is as follows: during the hydraulic conveying process of the fly pipe 5 in the drill pipe 102, the jaws of the suspension device 201 cling to the inner wall of the drill pipe 102 under the action of the torsion spring, when the drill pipe 102 passes through the joint, as the inner diameter of the joint is reduced, the clamping jaw impacts the inner diameter of the joint and is folded into the clamping seat to send out an obvious sound wave change signal once, such as a sound intensity diagram shown in figure 1 to generate a first wave peak, after passing through the joint, the joint is suddenly opened at a certain angle under the action of the torsional spring to knock the inner wall of the drill rod 102 to send another sound wave change signal, the sound intensity diagram generates a second wave peak, so that every time a regular two consecutive acoustic wave changes occur as it passes through the drill pipe joint, it is transmitted through drill pipe 102 to the port acoustic receiver 301, the received acoustic signal is identified by acoustic analyzer 302, a certain sound intensity threshold Ix can be set, when the sound intensity I exceeds Ix for two times, the sieve tube suspension device passes through one drill rod, the conveying depth of the fly tube is converted according to the length of the single drill rod, and the conveying depth is displayed in real time.
The following describes the construction method of the present embodiment by taking the bottom plate comb drilling forward-type branch as an example. The method specifically comprises the following steps:
the first step is as follows: a main comb-shaped directional drilling hole of the bottom plate is positioned in a rock stratum of the bottom plate 2, a track of a comb-shaped branch hole 4 extends from the bottom plate 2 to the coal seam 3 to drill a final hole meeting the top plate 1, and a directional drilling tool is lifted out of the hole after a hole is formed in a 1 st branch hole 4-1;
the second step is that: connecting an openable and closable drill bit 101 and a drill rod 102, descending to the hole bottom of a branch hole 4-1, introducing water, repeatedly washing for a period of time, and lifting the drilling tool 6 away from the hole bottom, wherein the lifting distance is not less than the total length of the suspension device 201 and the solid pipe 202;
the third step: connecting the flying pipe 5-1 of the 1 st branch hole and then putting the flying pipe into the drill rod 102, wherein the length of the flying pipe 5-1 is determined according to the length of the 4-1 st branch hole and the length of the coal hole section of the coal seam 3 to be drilled;
the fourth step: connecting a water closet 7, starting a flying pipe conveying depth recognition assembly 9, starting a water pump 8, gradually increasing the flow and pressure of the water pump 8, conveying the flying pipe 5-1 to the bottom of a branch hole 4-1 by utilizing the hydraulic action, observing the conveying depth change of the flying pipe 5-1 through an acoustic wave analyzer 302 in the conveying process, and closing the water pump 8 after reaching the preset conveying depth;
the fifth step: unloading the water closet 7, and lifting out the drilling tool 6 to complete the lowering of the flying pipe 5-1 of the 1 st branch hole;
and a sixth step: and (5) running the directional drilling tool again to construct the 2 nd branch hole 4-2, repeating the first step to the fifth step, and running the flying pipe 5-2 of the 2 nd branch hole section, and repeating the steps until the flying pipe 5-n of the last branch hole is put in place.
According to the above description, the problem of hole protection of the coal hole section of the comb-shaped branch hole of the top and bottom plates of the underground coal mine is solved, and efficient gas extraction of the branch hole is ensured. The conveying depth measuring device solves the problem of measuring the conveying depth of the flying pipe in the drill rod through sound wave detection, and is beneficial to judging the real-time conveying state and the in-place condition of the flying pipe.
References in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a colliery is comby branch hole of roof bottom plate in pit flies a tub construction drilling tool which characterized in that includes:
the drill bit (101) is an openable and closable drill bit, and the rear end of the drill bit is connected with the drill rod (102);
the flying pipe (5) is provided with a suspension device (201), a solid pipe (202) and a sieve pipe (203);
wherein the flying pipe (5) is used for being conveyed in the drill rod (102) through water power and entering the drill hole through the drill bit (101) which can be opened and closed.
2. The coal mine underground roof and floor comb-shaped branch hole flying pipe construction drilling tool as claimed in claim 1, further comprising a sound wave receiver (301); wherein, a claw which is arranged to be clung to the inner wall of the drill rod (102) and can stretch out and draw back under the action of torsional spring force is arranged on the suspension device (201); the sound wave receiver (301) is used for sensing sound waves emitted by the fact that the clamping jaws are knocked on the inner wall of the drill rod (102) due to contraction or bouncing.
3. The coal mine underground roof and floor comb-shaped branch hole flying pipe construction drilling tool as claimed in claim 1, wherein the length of the solid pipe (202) is not less than the length of one drill pipe (102).
4. The coal mine underground roof and floor comb-shaped branch hole fly pipe construction drilling tool as claimed in claim 1, wherein the diameter of the solid pipe (202) is larger than or equal to that of the sieve pipe (203) and is smaller than the minimum inner diameter of a joint between adjacent drill pipes (102).
5. A coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction method is characterized by comprising the following steps:
conveying the flying pipe (5) in the drill rod (102) through the openable and closable drill bit (101) by utilizing water power to enable the flying pipe (5) to enter the drill hole.
6. The method for constructing the flying pipe of the comb-shaped branch hole of the coal mine underground roof and floor as claimed in claim 5, is characterized by comprising the following steps: a claw tightly attached to the inner wall of the drill rod (102) is arranged on a suspension device (201) of the flying pipe (5); receiving sound waves generated by knocking the drill rod due to the fact that the clamping jaws stretch or bounce under the action of torsional spring force when penetrating through the joint of the drill rod (102); and judging the running-in depth of the flying pipe by using the sound wave sum and the length of a single drill rod.
7. The method for constructing the flying pipe of the comb-shaped branch hole of the coal mine underground roof and floor as claimed in claim 5, characterized in that a comb-shaped directional drilling main hole of the floor located in the rock stratum of the floor (2) is constructed, a comb-shaped branch hole (4) which extends from the floor (2) to the coal seam (3) and is provided with a final hole at the roof (1) is constructed, and the flying pipe (5) is put into the branch hole (4).
8. A coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction method is characterized by comprising the following steps:
step 1, a main hole of a comb-shaped directional drilling hole of a bottom plate is positioned in a rock stratum of the bottom plate, a track of a comb-shaped branch hole extends from the bottom plate to the coal stratum to drill a final hole meeting a top plate, and a directional drilling tool is lifted out of the hole after a hole is formed in a 1 st branch hole;
step 2, connecting the drill bit capable of being opened and closed and the drill rod, putting the drill bit and the drill rod into the hole bottom of the branch hole, introducing water, repeatedly washing for a period of time, and then lifting the drilling tool away from the hole bottom, wherein the lifting distance is not less than the total length of the suspension device and the solid pipe;
step 3, connecting the flying pipes of the 1 st branch hole and then putting the flying pipes into a drill rod, wherein the length of the flying pipes is determined according to the length of the 1 st branch hole and the length of the coal hole section of the coal seam to be drilled;
step 4, connecting water and convenience, starting the flying pipe conveying depth recognition assembly, starting the water pump, gradually increasing the flow and pressure of the water pump, conveying the flying pipe to the bottom of the branch hole by utilizing the hydraulic action, observing the conveying depth change of the flying pipe through the acoustic wave analyzer in the conveying process, and closing the water pump after reaching the preset conveying depth;
step 5, unloading the water and the excrement, and lifting out the drilling tool to finish the flying pipe descending of the 1 st branch hole;
and 6, repeating the steps 1-5 until the flying pipe of the last branch hole is put in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644617.2A CN111764872B (en) | 2020-07-07 | 2020-07-07 | Coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644617.2A CN111764872B (en) | 2020-07-07 | 2020-07-07 | Coal mine underground top and bottom plate comb-shaped branch hole pipe flying construction drilling tool and construction method |
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| CN111764872A true CN111764872A (en) | 2020-10-13 |
| CN111764872B CN111764872B (en) | 2023-04-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412423A (en) * | 2021-12-22 | 2022-04-29 | 中煤科工集团西安研究院有限公司 | Broken soft coal seam gas extraction bedding directional drilling sieve tube running device and method |
| CN114412425A (en) * | 2021-12-24 | 2022-04-29 | 中煤科工集团西安研究院有限公司 | Colliery is impact crushing formula boosting joint for screen pipe hydraulic pressure/air transport in pit |
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| CN114412425A (en) * | 2021-12-24 | 2022-04-29 | 中煤科工集团西安研究院有限公司 | Colliery is impact crushing formula boosting joint for screen pipe hydraulic pressure/air transport in pit |
| CN114412425B (en) * | 2021-12-24 | 2024-06-04 | 中煤科工集团西安研究院有限公司 | Impact crushing type boosting joint for hydraulic/air conveying of underground coal mine sieve tube |
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| Publication number | Publication date |
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| CN111764872B (en) | 2023-04-07 |
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