CN210685919U - Underground water blowout prevention back pressure device - Google Patents
Underground water blowout prevention back pressure device Download PDFInfo
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- CN210685919U CN210685919U CN201921293171.2U CN201921293171U CN210685919U CN 210685919 U CN210685919 U CN 210685919U CN 201921293171 U CN201921293171 U CN 201921293171U CN 210685919 U CN210685919 U CN 210685919U
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Abstract
The utility model discloses an underground water blowout prevention back pressure device, which comprises a straight pipe, a branch pipe, a drill rod, a gland and a blowout prevention back pressure device, wherein one end of the branch pipe is communicated with the side wall of the straight pipe, and the other end of the branch pipe is provided with a water drain gate valve; the drill rod is sleeved in the straight pipe, a baffle ring is arranged in the straight pipe, a pressure cover is sleeved in the straight pipe on one side of the baffle ring, a through hole is formed in the pressure cover, the pressure cover is connected with the straight pipe through a bolt, the drill rod is inserted into an insertion hole in the pressure cover, and sealing packing is filled in gaps among the baffle ring, the pressure cover, the straight pipe and the drill rod; the blowout prevention counterpressure device is sleeved on the drill rod and is fixedly connected with the gland. When the device is used, the straight pipe is fixed on the pore plate, when water seeps in the drilled hole, the water is collected into the inner cavities of the straight pipe and the branch pipe, and the field environment is optimized because the inner cavities are sealed by the sealing filler; utilize the manometer monitoring inner chamber water pressure in addition, when water pressure was too big, open the gate valve that drains, carry out the drainage, when avoiding water pressure too big, leak from gland packing.
Description
The technical field is as follows:
the utility model relates to a back pressure device especially relates to an underground water prevents spouting back pressure device.
Background art:
when a hole is deeply drilled under a water-bearing surrounding rock, the water-bearing layer generally needs to be penetrated, and the water gushing of the drilled hole needs to be blocked.
In the forty-sixth provision of the rules for coal mine water conservation and Water conservation, when water is detected at a place where the water pressure is expected to be greater than 0.1MPa, a sleeve is fixed in advance, and a gate valve is installed. The pressure resistance test should be carried out on the water stop sleeve, the pressure resistance value is not less than 1.5 times of the predicted hydrostatic pressure value, the water stop sleeve is also used for grouting and drilling, the final pressure value of the comprehensive grouting should be determined, and the stability is more than 30 min; when the predicted water pressure is more than 1.5MPa, the hole is drilled by adopting a counter pressure method and a blowout preventer, and measures for preventing the orifice pipe and the coal (rock) wall from suddenly bulging are made.
Therefore, when the predicted water pressure in the well is more than 1.5MPa, a two-stage casing high-pressure grouting water plugging technology is needed for plugging, namely, a first-stage casing is installed at a drilling hole for high-pressure grouting, and then a second-stage casing is installed for water plugging after grouting. The first-stage casing is fixedly connected with a drilling hole, after a construction drilling hole penetrates through a water-bearing stratum, the second-stage casing is lowered to support the loose and soft surrounding rock section drilling hole which is easy to collapse and contains water, high-pressure grouting is conducted on a space containing water and cracks through the two-stage casing, a blowout-preventing back pressure device shown in the figure 1 is fixed on a pore plate which connects the first-stage casing and the second-stage casing, when a drill rod has the back-spraying sign, a pipe wrench is used for clamping one section of the drill rod which is located in the back pressure device, and the pipe wrench is clamped in the back pressure device in the back-spraying process of the drill rod to limit.
However, when the existing blowout-preventing back pressure device is adopted, because water is blocked only by grouting, when a water-containing layer with higher pressure is encountered, the conditions of untight blocking and water leakage can be caused, and the field construction environment cannot be effectively improved.
The utility model has the following contents:
in order to solve the technical problem, an object of the utility model is to provide an underground water prevents spouting back pressure device, the main action lies in avoiding the drilling tool to spout outward and controls water pressure in the drilling hole promptly.
The utility model discloses by following technical scheme implement: the underground water blowout prevention back pressure device comprises a straight pipe, a branch pipe, a drill rod, a gland and a blowout prevention back pressure device, wherein one end of the branch pipe is communicated with the side wall of the straight pipe, and the other end of the branch pipe is provided with a water drain gate valve; the drill rod is sleeved in the straight pipe, a baffle ring is arranged in the straight pipe, a pressure cover is sleeved in the straight pipe on one side of the baffle ring, a through hole is formed in the pressure cover, the pressure cover is connected with the straight pipe through a bolt, the drill rod is inserted into a jack on the pressure cover, and sealing filler is filled in gaps among the baffle ring, the pressure cover, the straight pipe and the drill rod; the blowout prevention counterpressure device is sleeved on the drill rod, and the blowout prevention counterpressure device is fixedly connected with the gland.
Furthermore, a connecting pipe is further arranged between the straight pipe and the gland, the baffle ring is annularly and fixedly arranged on the inner wall of the connecting pipe, the gland is sleeved in the connecting pipe at one side of the baffle ring away from the straight pipe, and two ends of the connecting pipe are respectively connected with the straight pipe and the gland through flanges; and sealing packing is filled in gaps among the baffle ring, the gland, the connecting pipe and the drill rod.
Further, the branch pipe is obliquely communicated with the straight pipe, one end of the branch pipe, which is provided with the water drain valve, faces the connecting pipe, and the angle α between the branch pipe and the straight pipe is 30 degrees.
Further, a pressure gauge is arranged on the straight pipe or the branch pipe.
The utility model has the advantages that: when the device is used, the straight pipe is firstly fixed on a pore plate which connects the primary sleeve and the secondary sleeve, when water seepage exists in the drilled hole, the water seepage is collected into the inner cavities of the straight pipe and the branch pipe, and the sealing filler is used for sealing, so that the field environment is optimized, and the production efficiency is improved; utilize the manometer monitoring inner chamber water pressure in addition, when water pressure was too big, open the gate valve that drains, carry out the drainage, when avoiding water pressure too big, leak from gland packing.
This device straight tube, sleeve pipe, gland and backpressure ware adopt removable mode to connect, make things convenient for the dismouting to use on the one hand, and on the other hand makes things convenient for the change of each part, helps reducing enterprise manufacturing cost, improves enterprise production efficiency.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional blowout preventer;
fig. 2 is a schematic structural diagram of the groundwater blowout prevention backpressure device in the embodiment.
In the figure: the device comprises a straight pipe 1, a branch pipe 2, a connecting pipe 3, a drill rod 4, a gland 5, an anti-blowout counterpressure device 6, a pressure gauge 7, a water drain gate valve 8, a baffle ring 9 and a sealing filler 10.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An underground water blowout prevention back pressure device comprises a straight pipe 1, a branch pipe 2, a connecting pipe 3, a drill pipe 4, a gland 5 and a blowout prevention back pressure device 6, wherein a pressure gauge 7 is arranged on the straight pipe 1, one end of the branch pipe 2 is communicated with the side wall of the straight pipe 1, a water drain gate valve 8 is arranged at the other end of the branch pipe 2, the branch pipe 2 is obliquely communicated with the straight pipe 1, one end of the branch pipe 2, which is provided with the water drain gate valve 8, is arranged towards the connecting pipe 3, the angle α between the branch pipe 2 and the straight pipe 1 is 30 degrees, the drill pipe 4 is sleeved in the straight pipe 1, a baffle ring 9 is annularly arranged on the inner wall of the connecting pipe 3, the gland 5 is sleeved in the connecting pipe 3, which is far away from the straight pipe 1, two ends of the connecting pipe 3 are respectively connected with the straight pipe 1 and the gland 5 through flanges, sealing packing 10 is filled in gaps among the baffle ring 9, the gland 5.
When the device is used, the straight pipe 1 is fixed on a pore plate which connects the first-stage sleeve and the second-stage sleeve, when water seepage exists in a drilled hole, the water seepage is collected into inner cavities of the straight pipe 1 and the branch pipe 2, and the sealing filler 10 is used for sealing, so that the field environment is optimized; utilize manometer 7 monitoring inner chamber water pressure in addition, when water pressure was too big, open the gate valve that drains, carry out the drainage, when avoiding water pressure too big, leak from gland packing 10.
Of course, when the drill rod 4 has the back-spray sign, the pipe tongs are continuously clamped on a section of the drill rod 4 in the back-pressure device, and the pipe tongs are clamped in the back-pressure device during the back-spray process of the drill rod 4, so that the back-spray of the drill rod is limited.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The underground water blowout prevention back pressure device is characterized by comprising a straight pipe, a branch pipe, a drill rod, a gland and a blowout prevention back pressure device, wherein one end of the branch pipe is communicated with the side wall of the straight pipe, and the other end of the branch pipe is provided with a water drain gate valve; the drill rod is sleeved in the straight pipe, a baffle ring is arranged in the straight pipe, a pressure cover is sleeved in the straight pipe on one side of the baffle ring, a through hole is formed in the pressure cover, the pressure cover is connected with the straight pipe through a bolt, the drill rod is inserted into a jack on the pressure cover, and sealing filler is filled in gaps among the baffle ring, the pressure cover, the straight pipe and the drill rod; the blowout prevention counterpressure device is sleeved on the drill rod, and the blowout prevention counterpressure device is fixedly connected with the gland.
2. The underground water blowout-prevention back-pressure device according to claim 1, wherein a connecting pipe is further arranged between the straight pipe and the gland, the retaining ring is annularly and fixedly arranged on the inner wall of the connecting pipe, the gland is sleeved in the connecting pipe on the side, away from the straight pipe, of the retaining ring, and two ends of the connecting pipe are respectively connected with the straight pipe and the gland through flanges; and sealing packing is filled in gaps among the baffle ring, the gland, the connecting pipe and the drill rod.
3. The underground water blowout prevention back pressure device according to claim 2, wherein the branch pipe is obliquely communicated with the straight pipe, one end of the branch pipe provided with the sluice valve is arranged towards the connecting pipe, and an angle α between the branch pipe and the straight pipe is 30 degrees.
4. A groundwater blowout prevention backpressure device as claimed in claim 2 or claim 3, wherein a pressure gauge is provided on the straight pipe or branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921293171.2U CN210685919U (en) | 2019-08-09 | 2019-08-09 | Underground water blowout prevention back pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921293171.2U CN210685919U (en) | 2019-08-09 | 2019-08-09 | Underground water blowout prevention back pressure device |
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| Publication Number | Publication Date |
|---|---|
| CN210685919U true CN210685919U (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921293171.2U Active CN210685919U (en) | 2019-08-09 | 2019-08-09 | Underground water blowout prevention back pressure device |
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| CN (1) | CN210685919U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550787A (en) * | 2021-08-30 | 2021-10-26 | 旬邑县中达燕家河煤矿有限公司 | Roof separation layer water drainage structure and construction method |
| CN114016935A (en) * | 2021-10-20 | 2022-02-08 | 中勘资源勘探科技股份有限公司 | Counterweight drill collar for large-caliber drilling construction |
-
2019
- 2019-08-09 CN CN201921293171.2U patent/CN210685919U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550787A (en) * | 2021-08-30 | 2021-10-26 | 旬邑县中达燕家河煤矿有限公司 | Roof separation layer water drainage structure and construction method |
| CN114016935A (en) * | 2021-10-20 | 2022-02-08 | 中勘资源勘探科技股份有限公司 | Counterweight drill collar for large-caliber drilling construction |
| CN114016935B (en) * | 2021-10-20 | 2024-02-06 | 中勘资源勘探科技股份有限公司 | Counterweight drill collar for large-caliber drilling construction |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Gang Inventor after: Zhang Yian Inventor after: Zhang Xiujun Inventor after: Jiao Zhongli Inventor before: Wang Gang Inventor before: Zhang Yian Inventor before: Zhang Xiujun Inventor before: Jiao Zhongli |
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| CB03 | Change of inventor or designer information |