CN214886966U - Blowout preventer for underground construction gas cross-layer drilling - Google Patents
Blowout preventer for underground construction gas cross-layer drilling Download PDFInfo
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- CN214886966U CN214886966U CN202121277613.1U CN202121277613U CN214886966U CN 214886966 U CN214886966 U CN 214886966U CN 202121277613 U CN202121277613 U CN 202121277613U CN 214886966 U CN214886966 U CN 214886966U
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- Prior art keywords
- cavity
- whistle
- annular
- sleeve
- wall
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- 238000005553 drilling Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000000605 extraction Methods 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 25
- 239000003245 coal Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003818 cinder Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to a mining equipment construction technical field provides a blowout preventer that layer drilling was worn to construction gas in pit, including cavity and direction sealing mechanism, the cavity left and right sides is equipped with a whistle with it intercommunication respectively, and the cavity bottom is connected with communicating downthehole pipe with it, and the cover is equipped with the inflation rubber ring on the downthehole intraductal outer wall. The device is reasonable in structure, the guiding and sealing mechanism can provide positioning and guiding for the drill rod of the drilling machine, large radial runout of the drill rod is avoided, and the service lives of the annular sealing washer and the annular brush are effectively prolonged; the guide sealing mechanism is fixedly connected with the cavity through the flange, and the connection mode is reliable in sealing and convenient to maintain and disassemble.
Description
Technical Field
The utility model relates to a mining equipment construction technical field, in particular to blowout preventer that layer drilling was worn to construction gas in pit.
Background
The underground drilling extraction is one of main measures for controlling coal mine gas and eliminating coal and gas outburst, and the gas content of a coal seam is reduced through extraction, so that the gas emission amount during mine stoping is reduced, and the danger of the coal and gas outburst is reduced. The ground extraction method is that a well is drilled in the ground, the coal bed is fractured through a well pipe, a fracture affected zone is formed in the coal bed, and then gas is released through natural pressure release of the gas or reinjection water, so that the effect of extracting the gas in the coal bed is achieved. The technology is derived from oil extraction technology, and is mature at present. However, the geological structure of the existing coal mine is complex, and the effect of completely extracting gas cannot be achieved by directly extracting the gas on the ground. In many cases, gas is also exhausted by means of direct drilling drainage in the underworkings. Blowout preventers are required to be used in drilling tools to prevent gas leakage during drilling and drainage.
The applicant applies a utility model named as a coal and gas blowout preventer for mining drilling construction in 2020, 9 and 2 days (publication number: CN 212837666U) to the intellectual property office of China, and the utility model discloses a coal and gas blowout preventer for mining drilling construction, and further discloses a structure of the coal and gas blowout preventer, wherein the number of whistle is two, the whistle is respectively arranged at the left end and the right end of the cavity, the whistle is communicated with the cavity, one end of the whistle far away from the cavity is provided with an elbow, a pipe clamp is fixedly arranged between the elbow and the whistle, the front end of the cavity is fixedly provided with an inner hole pipe which is communicated with each other, the side end of the inner hole pipe is fixedly sleeved with an expansion rubber ring, the rear wall of the cavity is provided with a circular opening, the rear end of the cavity is provided with a rear end cover matched with the circular opening, the lower end of the rear end cover is fixedly connected with the cavity in a hinged mode, the upper end of the rear end cover is connected with the cavity through a hasp lock, the hasp lock comprises a fixed base, a fixed lock head and a hasp which are matched with each other, the lower end of the fixed base is fixedly connected with the rear end of the upper wall of the cavity, the upper end of the fixed base is provided with a handle, the rear end of the handle is fixedly connected with the upper end of the fixed base through a handle pin, the hasp is arranged at the upper end of the handle, the front end of the hasp is connected with the middle part of the handle through a handle movable pin, the middle part of the handle is provided with a handle ring matched with the handle movable pin, the handle movable pin extends into the handle ring, the middle part of the rear end of the hasp is provided with a hasp hole matched with the fixed lock head, the lower end of the fixed lock head is fixedly arranged at the upper end of the rear wall of the rear end cover, the upper end of the fixed lock head is inserted into the hasp hole, and a spring is fixedly arranged between the handle fixed pin and the handle movable pin, o-shaped silica gel rings are arranged on the periphery of the inner wall of the circular opening, and a hairbrush is arranged on the side wall of the circular opening at the rear end of each O-shaped silica gel ring and is annular.
Although this patent application has solved O type silica gel circle and brush quick replacement's problem, it still has following problem: in this patent application, it discloses that when its specifically is used, after the rig drilling rod penetrated rear end cap, circular opening, cavity and downthehole pipe in proper order, began to bore a hole and take out the drainage to the cliff, at this in-process, brush and O type silica gel circle sealed the gap between drilling rod and the rear end cap, prevented the blowout of coal and gas, made the cinder and the water that return in the drilling to flow into the cavity through the hole inner tube, the cinder water mixture of cavity inside was taken out or is discharged respectively through two whistle (two are whistle respectively corresponding connection take out and take out pipe or row sediment pipe). Because the drilling rod of the drilling machine drills in the rock stratum, because the rock stratum composition is uncertain, when the drill bit suddenly touches hard particles or objects from the soft rock stratum, the drilling rod of the drilling machine is easy to generate radial circular run-out in a certain direction, thereby generating excessive friction with an O-shaped silica gel ring, a brush and an inner hole pipe in the direction, causing the local abrasion of the O-shaped silica gel ring and the brush to be too fast, influencing the sealing effect and needing to be frequently replaced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blowout preventer of layer drilling is worn to construction gas in pit to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a blowout preventer for gas cross-layer drilling in underground construction comprises a cavity, wherein a whistle communicated with the cavity is arranged on each of the left side and the right side of the cavity, a hole inner pipe communicated with the cavity is connected to the bottom of the cavity, an expansion rubber ring is sleeved on the outer wall of the hole inner pipe, the blowout preventer further comprises a guide sealing mechanism, the guide sealing mechanism comprises an outer sleeve, an inner sleeve, a bearing pressing plate and a plurality of bearings, flanges are respectively extended from the upper end surface and the lower end surface of the outer sleeve, a first annular partition plate is fixedly arranged on the inner wall of a ring at the bottom end surface of an inner cavity of the outer sleeve, the inner sleeve is coaxially arranged in the outer sleeve, and the outer wall of the inner sleeve is rotatably connected with the inner wall of the outer sleeve through the plurality of bearings; the bearing pressure plate is of an annular structure, is sleeved on the inner sleeve and is fixedly connected with the flange plate on the upper end surface of the outer sleeve through bolts; the upper end surface of the inner sleeve is higher than the upper end surface of the bearing pressing plate, the inner diameter of the inner sleeve is in clearance fit with a drill rod of a drilling machine, and a jackscrew for fixing the drill rod of the drilling machine is arranged on the side wall of the inner sleeve higher than the upper end surface of the bearing pressing plate;
a second annular partition plate is fixedly arranged on the inner wall of the cavity and is positioned at the upper parts of the communicating openings of the two whistle handles and the cavity; an extended flange is arranged on the upper end face of the cavity, the guide sealing mechanism is fixedly connected with the flange on the upper end face of the cavity through a flange on the lower end face of the outer sleeve and a flange bolt, and an annular sealing washer is clamped between the two flanges;
at least one annular brush is arranged in a cavity between the second annular partition plate and the annular sealing washer, and the annular brush is tightly pressed and fixed by the annular sealing washer.
Preferably, the clearance between the inner sleeve and the drill rod of the drilling machine is not more than 0.2 mm.
Preferably, the number of the bearings is two, the two bearings are respectively arranged at the upper part and the lower part of the inner wall of the outer sleeve, the bearing and the bearing pressure plate or the first annular partition plate are axially supported through a bearing gasket, and the two bearings are axially supported through a bearing spacer sleeve.
Preferably, the two whistle handles are respectively an extraction whistle and a slag discharge whistle, the extraction whistle is used for connecting a gas extraction device, and the slag discharge whistle is used for connecting a slag discharge device; the included angle between the axes of the extraction whistle and the slag discharge whistle is 120 degrees.
Preferably, the extraction whistle and the slag discharge whistle are symmetrically arranged on the left side and the right side of the cavity.
The device is reasonable in structure, the guiding and sealing mechanism can provide positioning and guiding for the drill rod of the drilling machine, large radial runout of the drill rod is avoided, and the service lives of the annular sealing washer and the annular brush are effectively prolonged; the guide sealing mechanism is fixedly connected with the cavity through the flange, and the connection mode is reliable in sealing and convenient to maintain and disassemble.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following description of embodiments thereof, which is made for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
Example 1
Referring to fig. 1, the blowout preventer for gas cross-layer drilling in underground construction comprises a cavity 1, wherein a handle whistle communicated with the cavity is respectively arranged on the left side and the right side of the cavity, the two handle whistles are an extraction handle whistle 2 and a slag discharge handle whistle 3, the extraction handle whistle is used for connecting a gas extraction device, and the slag discharge handle whistle is used for connecting a slag discharge device; the included angle between the axes of the extraction whistle and the slag discharge whistle is 120 degrees. Preferably, the extraction whistle and the slag discharge whistle are arranged on the left side and the right side of the cavity, and the extraction whistle and the slag discharge whistle are symmetrical in position.
The bottom of the cavity is connected with an inner hole tube 4 communicated with the cavity, the outer wall of the inner hole tube is sleeved with an expansion rubber ring 5, the cavity further comprises a guide sealing mechanism, the guide sealing mechanism comprises an outer sleeve 6, an inner sleeve 7, a bearing pressing plate 8 and two bearings 9, flange plates extend out of the upper end face and the lower end face of the outer sleeve respectively, a first annular partition plate 10 is fixedly arranged on the annular inner wall of the bottom end face of the inner cavity of the outer sleeve, the inner sleeve is coaxially arranged in the outer sleeve, the outer wall of the inner sleeve and the inner wall of the outer sleeve are rotatably connected through the two bearings, the two bearings are arranged on the upper portion and the lower portion of the inner wall of the outer sleeve respectively, the bearings and the bearing pressing plate or the first annular partition plate are axially supported through a bearing gasket 11, and the two bearings are axially supported through a bearing spacer sleeve 12; the bearing pressure plate is of an annular structure, is sleeved on the inner sleeve and is fixedly connected with the flange plate on the upper end surface of the outer sleeve through bolts; the upper end surface of the inner sleeve is higher than the upper end surface of the bearing pressing plate, the inner diameter of the inner sleeve is in clearance fit with a drill rod of a drilling machine, the clearance between the inner sleeve and the drill rod of the drilling machine is not more than 0.2mm, and a jackscrew 13 for fixing the drill rod of the drilling machine is arranged on the side wall of the inner sleeve higher than the upper end surface of the bearing pressing plate;
a second annular partition plate 14 is fixedly arranged on the inner wall of the cavity and is positioned at the upper parts of the communicating openings of the two whistle handles and the cavity; an extended flange is arranged on the upper end face of the cavity, the guide sealing mechanism is fixedly connected with the flange on the upper end face of the cavity through a flange on the lower end face of the outer sleeve and a flange bolt, and an annular sealing washer 15 is clamped between the two flanges;
an annular brush 16 is arranged in a cavity between the second annular partition plate and the annular sealing washer, and the annular brush is tightly pressed and fixed by the annular sealing washer.
The application method comprises the following steps: firstly, reaming a drilled hole, matching the diameter of the reamed hole with the diameter of an expansion rubber ring, removing the drill, sequentially passing a drill rod of the drill through an inner sleeve, an annular sealing washer, an annular hairbrush and an inner hole pipe, then sending the inner hole pipe and the expansion rubber ring of the blowout preventer into the drilled hole, enabling the expansion rubber ring to be attached to a rock wall, and rotating the blowout preventer according to needs to enable an extraction whistle and a slag discharge whistle to be respectively connected with a gas extraction device and a slag discharge device; then, a drill rod and an inner sleeve of the drilling machine are relatively fixed by screwing a jackscrew, the drilling machine is started to carry out drilling and production operation, coal slag, water and gas returning in a drill hole enter a cavity through an inner pipe of the hole and are respectively discharged from an extraction whistle and a slag discharge whistle, the drill rod and the inner sleeve rotate together in the drilling and production process and rotate and rub with the outer sleeve through a bearing, the inner sleeve provides axial guidance and radial restraint for the drill rod in the process, the jump of the drill rod caused by uneven stress in the drilling process is reduced, the drill rod, the annular sealing washer and the annular hairbrush uniformly rub, and the service lives of the annular sealing washer and the annular hairbrush are effectively prolonged.
The present invention has been described above with reference to the accompanying drawings, as long as it is a variety of insubstantial improvements made by using the method concept and technical solutions of the present invention; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (5)
1. The utility model provides a blowout preventer of layer drilling is worn to construction gas in pit, includes the cavity, and the cavity left and right sides is equipped with a whistle with it intercommunication respectively, and the cavity bottom is connected with communicating downthehole pipe with it, and the cover is equipped with inflation rubber ring, its characterized in that on the downthehole outer wall of managing: the guide sealing mechanism comprises an outer sleeve, an inner sleeve, a bearing pressing plate and a plurality of bearings, flange plates extend outwards from the upper end face and the lower end face of the outer sleeve respectively, a first annular partition plate is fixedly arranged on the annular inner wall of the bottom end face of the inner cavity of the outer sleeve, the inner sleeve is coaxially arranged in the outer sleeve, and the outer wall of the inner sleeve is rotatably connected with the inner wall of the outer sleeve through the plurality of bearings; the bearing pressure plate is of an annular structure, is sleeved on the inner sleeve and is fixedly connected with the flange plate on the upper end surface of the outer sleeve through bolts; the upper end surface of the inner sleeve is higher than the upper end surface of the bearing pressing plate, the inner diameter of the inner sleeve is in clearance fit with a drill rod of a drilling machine, and a jackscrew for fixing the drill rod of the drilling machine is arranged on the side wall of the inner sleeve higher than the upper end surface of the bearing pressing plate;
a second annular partition plate is fixedly arranged on the inner wall of the cavity and is positioned at the upper parts of the communicating openings of the two whistle handles and the cavity; an extended flange is arranged on the upper end face of the cavity, the guide sealing mechanism is fixedly connected with the flange on the upper end face of the cavity through a flange on the lower end face of the outer sleeve and a flange bolt, and an annular sealing washer is clamped between the two flanges;
at least one annular brush is arranged in a cavity between the second annular partition plate and the annular sealing washer, and the annular brush is tightly pressed and fixed by the annular sealing washer.
2. The blowout preventer of claim 1, wherein: the clearance between the inner sleeve and the drill rod of the drilling machine is not more than 0.2 mm.
3. The blowout preventer of claim 2, wherein: the two bearings are respectively arranged at the upper part and the lower part of the inner wall of the outer sleeve, the bearing and the bearing pressure plate or the first annular partition plate are axially supported through a bearing gasket, and the two bearings are axially supported through a bearing spacer sleeve.
4. The blowout preventer of claim 3, wherein: the two whistle handles are respectively an extraction whistle and a deslagging whistle, the extraction whistle is used for connecting a gas extraction device, and the deslagging whistle is used for connecting a deslagging device; the included angle between the axes of the extraction whistle and the slag discharge whistle is 120 degrees.
5. The blowout preventer of claim 4, wherein: the extraction whistle and the slag discharge whistle are symmetrically arranged on the left side and the right side of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121277613.1U CN214886966U (en) | 2021-06-07 | 2021-06-07 | Blowout preventer for underground construction gas cross-layer drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121277613.1U CN214886966U (en) | 2021-06-07 | 2021-06-07 | Blowout preventer for underground construction gas cross-layer drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214886966U true CN214886966U (en) | 2021-11-26 |
Family
ID=78898885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121277613.1U Expired - Fee Related CN214886966U (en) | 2021-06-07 | 2021-06-07 | Blowout preventer for underground construction gas cross-layer drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214886966U (en) |
-
2021
- 2021-06-07 CN CN202121277613.1U patent/CN214886966U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |