Large-caliber gas box for mine rescue drilling

Abstract

The utility model discloses a large-caliber gas box for mine rescue drilling, which comprises an upper cover, a gas box main body, a lower cover, a gas inlet ring, an inner pipe and a flange, and the upper cover, the gas box main body and the lower cover are connected in sequence; the air inlet ring sleeves the air box main body and is positioned between the end edge of the air box main body and the lower cover; the inner pipe is connected with the lower cover through a flange, and a gap is formed between the inner pipe and the flange; the air inlet ring is provided with six air inlet holes evenly distributed in the circumferential direction of the air inlet ring, and the six air inlet holes are communicated with the gap through six air conveying channels formed in the air box body. By means of the six evenly-distributed air inlet holes and the corresponding air conveying channels in the air box body, it can be guaranteed that a large amount of compressed air continuously and stably enters gaps, the air inlet requirement of a drilling tool is met, the air box is suitable for large-diameter construction, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas box, more particularly to a large diameter gas box for rescue drilling on mine. BACKGROUND

[0002] Rescue drilling is a kind of technology used in emergency rescue site, mainly through drilling equipment to quickly open up rescue passage to provide life passage and necessary life support for trapped personnel. In order to reduce rescue time, large diameter directional rapid drilling technology is usually used to improve construction efficiency.

[0003] However, large diameter construction makes the size of drilling tool larger and the required compressed air volume larger, and the existing gas box as a gas supply device and drilling tool connecting medium cannot be applicable.

[0004] Therefore, it is an urgent problem for those skilled in the art to provide a large diameter gas box for rescue drilling on mine. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a large diameter gas box for rescue drilling on mine, which guarantees large amount of air intake demand and is suitable for large diameter construction.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A large diameter gas box for rescue drilling on mine, comprising an upper cover, a gas box body, a lower cover, an air inlet ring, an inner tube and a flange, the upper cover, the gas box body and the lower cover are connected in sequence; the air inlet ring is sleeved on the gas box body and located between the gas box body end along and the lower cover; the inner tube is connected with the lower cover through the flange, and a gap is formed between the inner tube and the flange; the air inlet ring has six air inlet holes uniformly distributed along the circumference thereof, and the six air inlet holes are respectively communicated with the gap through six gas conveying channels formed in the interior of the gas box body.

[0008] Through the above technical scheme, the utility model has the beneficial effects:

[0009] Through the six uniformly distributed air inlet holes and the corresponding gas conveying channels in the gas box body, large amount of compressed air can be continuously and stably introduced into the gap, the air intake demand of the drilling tool is met, and the large diameter construction is suitable.

[0010] Further, it further includes a protection joint, which is sleeved on the flange and surrounds the inner tube.

[0011] The beneficial effects of the above further technical scheme are that the flange and the inner tube are not damaged during transportation.

[0012] Further, the air inlet ring and the air box body end along, and the air inlet ring and the lower cover are all installed with gaskets.

[0013] The beneficial effects produced by the above further technical solutions are to prevent the relative movement of the air inlet ring and the air box body end along, and the air inlet ring and the lower cover to generate excessive wear.

[0014] Further, the air inlet ring and the air box body are sequentially installed with a guide ring and a dustproof ring.

[0015] Further, the air inlet ring has a lubricating hole penetrating to the outer wall of the air box body, and a pressure injection oil cup is installed in the lubricating hole.

[0016] The beneficial effects produced by the above further technical solutions are to play a lubricating role between the air inlet ring and the air box body. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0018] Fig. 1 The drawing is a sectional view of a large-diameter air box for mine rescue drilling provided by the present application;

[0019] Fig. 2 The drawing is a sectional view of the air inlet ring and the air box body provided by the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] As Figs. 1-2The utility model discloses a large -diameter gas box for on -the -mine rescue drilling, is used to send the air device and double -wall drill rod connection, namely compressed air passes through large -diameter gas box and enters the annular gap of double -wall drill rod, including upper cover 1, gas box main part 2, lower cover 3, air inlet ring 4, inner tube 5 and flange 6, upper cover 1, gas box main part 2 and lower cover 3 are connected in proper order, wherein, upper cover 1 is connected with full -hydraulic power head;Air inlet ring 4 is set on gas box main part 2 and is located between the end along of gas box main part 2 and lower cover 3;Inner tube 5 is connected with lower cover 3 through flange 6, and the gap between inner tube 5 and flange 6 is formed, and the gap is communicated with the annular gap of double -wall drill rod;Air inlet ring 4 has 6 air inlet holes 41 that are evenly distributed along its circumference, and the 6 air inlet holes 41 are communicated with the gap through 6 gas conveying channels 21 formed in the inside of gas box main part 2 respectively.The utility model discloses through 6 evenly distributed air inlet holes 41 and the corresponding gas conveying channel 21 in gas box main part 2, can guarantee that large -diameter compressed air (100m 3 / min) continuously and stably enters the annular gap, satisfies the air inlet demand of drilling tool, is applicable to large -diameter construction, improves construction efficiency.

[0022] It can be understood that the upper cover 1, the gas box main part 2, the lower cover 3, the air inlet ring 4, the inner tube 5 and the flange 6 are all large-diameter, thereby improving the carrying capacity of the drilling tool.

[0023] In order to further optimize the technical scheme of the utility model, the protective joint 7 is further included, the protective joint 7 is sleeved on the flange 6 and surrounds the inner tube 5, so that the flange 6 and the inner tube 5 are not damaged during transportation.

[0024] In order to further optimize the technical scheme of the utility model, the gasket 8 is installed between the air inlet ring 4 and the end along of the gas box main part 2, and between the air inlet ring 4 and the lower cover 3, in the embodiment, the gasket 8 is a copper gasket, which can prevent excessive wear caused by relative movement of the air inlet ring 4 and the end along of the gas box main part 2, and the air inlet ring 4 and the lower cover 3.

[0025] In order to further optimize the technical scheme of the utility model, the guide ring 9 and the dustproof ring 10 are installed in sequence between the air inlet ring 4 and the gas box main part 2, and the guide ring 9 enables the air inlet ring 4 and the gas box main part 2 to maintain coaxial distribution during relative movement.

[0026] In order to further optimize the technical scheme of the utility model, the air inlet ring 4 has a lubrication hole penetrating to the outer wall of the gas box main part 2, and the pressure injection oil cup 11 is installed in the lubrication hole, which plays a lubricating role between the air inlet ring 4 and the gas box main part 2.

[0027] The large-diameter gas box of the utility model can be applied to air-lift reverse circulation drilling tools or air reverse circulation drilling tools.

[0028] The air-lift reverse circulation drilling tool comprises a full hydraulic power head, a gas box, a double-wall drill pipe, a gas-water mixer, a variable nipple, a drill collar, a variable nipple and a reverse circulation roller bit. The air-lift reverse circulation working principle is similar to the air-lift water pumping working principle of an air compressor, that is, compressed air passes through a large-diameter gas box, enters the inner pipe from the mixer through the annular gap between the inner pipe and the outer pipe of the double-wall drill pipe, forms numerous small bubbles, the bubbles rise along the inner pipe and expand at the same time, thereby generating air-lift effect. Since compressed air continuously enters the well fluid, low specific gravity gas-water mixture is formed at the upper part of the mixer, and the liquid in the well has a large specific gravity. According to the principle of a communicating vessel, the gas-water mixture in the inner pipe flows upward under the action of pressure difference, continuously brings out the cuttings at the bottom of the well to the surface and into a sedimentation tank, and the sedimented mud flows back to the air, enters the drill pipe through the hole bottom to supplement the space of the circulating fluid, and thus continuously forms the process of drilling.

[0029] The air reverse circulation drilling tool comprises a full hydraulic power head, a gas box, a double-wall drill pipe and a reverse circulation impactor. When the air reverse circulation drilling tool is used for drilling, compressed air is pressed into the hole bottom from the annular gap between the inner pipe and the outer pipe of the double-wall drill pipe, high-pressure air is used as power to drive the down-the-hole hammer to work, the down-the-hole hammer is used to break rocks through reciprocating impact, the broken cuttings are carried to the surface through the inner pipe of the double-wall drill pipe along with the exhaust gas discharged after the down-the-hole hammer works, the cross section of the inner pipe is much smaller than the annular cross section of the drill pipe and the well wall, the air required to return from the inner pipe is much smaller than the air required in the positive circulation, and the drill pipe can be prevented from being stuck when the formation produces water.

[0030] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, the description is relatively simple because the device corresponds to the method disclosed in the embodiments, and the related parts can be referred to the description of the method.

[0031] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications of the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large-bore gas box for mine rescue drilling, characterized by, The utility model relates to a gas box sub -main body, lower cover, air inlet ring, inner tube and flange are included, the upper cover, the gas box sub -main body and the lower cover connect gradually, the air inlet ring is set up on the gas box sub -main body and is located between the gas box sub -main body end along with the lower cover, the inner tube is connected with the lower cover through the flange, and the inner tube and the flancre between form the interspace, the air inlet ring has 6 air inlet holes that are evenly distributed along its circumference, and the six air inlet holes are communicated with the interspace through six gas conveying channels set up in the gas box sub -main body interior respectively.

2. A large diameter gas sub for mine rescue drilling according to claim 1, characterised in that, It also includes a protective joint, which is sleeved on the flange and surrounds the inner tube.

3. A large diameter gas sub for mine rescue drilling according to claim 1 or 2, characterised in that, The air inlet ring and the gas box sub -main body end along, and the air inlet ring and the lower cover between all install the gasket.

4. A large diameter gas sub for mine rescue drilling according to claim 3, characterised in that, The air inlet ring and the gas box sub -main body are sequentially installed with a guide ring and a dustproof ring.

5. A large diameter gas sub for mine rescue drilling according to claim 3, wherein, The air inlet ring has a lubricating hole that penetrates to the outer wall of the gas box sub -main body, and a pressure injection oil cup is installed in the lubricating hole.

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