CN209942733U - Choke ring for realizing reverse circulation drilling of down-the-hole hammer - Google Patents
Choke ring for realizing reverse circulation drilling of down-the-hole hammer Download PDFInfo
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- CN209942733U CN209942733U CN201920188835.2U CN201920188835U CN209942733U CN 209942733 U CN209942733 U CN 209942733U CN 201920188835 U CN201920188835 U CN 201920188835U CN 209942733 U CN209942733 U CN 209942733U
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Abstract
The utility model discloses a choke ring for realizing reverse circulation drilling of a down-the-hole hammer, which comprises a blocking inner tube (1), wherein the blocking outer tube (2) is sleeved outside the blocking inner tube (1), and an annular space (20) is arranged between the blocking outer tube (2) and the blocking inner tube (1); the surface of the separation outer pipe (2) is sleeved with a wind resistance plate, the wind resistance plate is connected with a flange plate, and the flange plate is connected with a separation pad. The utility model discloses can block that high pressure medium and the drill slag detritus returns on the annular gap along down-the-hole hammer and drilling, keep high pressure medium pressure, make high pressure medium and drill slag detritus return from central channel by water conservancy diversion hole (214) of positive and negative joint (21) to realize the reverse circulation drilling of down-the-hole hammer.
Description
Technical Field
The utility model relates to a choke ring especially relates to a choke ring that is used for down-the-hole hammer to realize reverse circulation and creeps into.
Background
The air down-the-hole hammer drilling is that high-pressure air is used for driving the down-the-hole hammer to break rock, and the drilling can be divided into forward circulation drilling and reverse circulation drilling according to the circulation mode of flushing media. The positive circulation drilling is that high-pressure air is input into the bottom of a well through an inner hole of a drill column, and rock debris carried by the high-pressure air upwards returns through an annular space between the drill column and the wall of a drill hole; the reverse circulation drilling is that high-pressure air is input into the bottom of the well from an annular channel of the double-arm drill rod, and after drilling slag with rock debris, a flushing medium returns from a central channel of the double-arm drill rod.
The reverse circulation drilling of the air down-the-hole hammer is a preferred scheme for constructing large-diameter drilling holes and emergency rescue holes due to the advantages of strong chip carrying capacity, no scouring of upward-returning flushing liquid on the hole wall, high drilling speed and the like, and aims to further reduce the cost and prolong the service life of the down-the-hole hammer. Therefore, a study of the forward circulation down-the-hole hammer to achieve reverse circulation drilling was initiated. In the prior art, reverse circulation drilling capable of realizing positive circulation down-the-hole hammer without a choke ring is not available
Therefore, the technical problem that the down-the-hole hammer cannot implement reverse circulation drilling is solved by the aid of the wind resistance ring for realizing reverse circulation drilling of the down-the-hole hammer.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide a choke ring for realizing reverse circulation drilling of a down-the-hole hammer.
In order to realize the aim, the utility model provides a choke ring for realizing reverse circulation drilling of a down-the-hole hammer, which comprises a blocking inner pipe, wherein the blocking inner pipe is externally sleeved with a blocking outer pipe, and an annular space is arranged between the blocking outer pipe and the blocking inner pipe; the surface of the separation outer pipe is sleeved with a wind resistance plate, the wind resistance plate is connected with a flange plate, and the flange plate is connected with the separation pad.
Preferably, the choke plate comprises a first choke plate and a second choke plate; the flange plate comprises a first flange plate and a second flange plate; the barrier pads comprise a first barrier pad, a second barrier pad, a third barrier pad and a fourth barrier pad; the spacing pads comprise a first spacing pad, a second spacing pad, a third spacing pad and a fourth spacing pad.
Preferably, the first wind blocking disc is connected with the first flange disc, the first flange disc is connected with the first blocking pad, a first spacing pad is arranged between the first blocking pad and the second blocking pad, a second spacing pad is arranged between the second blocking pad and the third blocking pad, a third spacing pad is arranged between the third blocking pad and the fourth blocking pad, a fourth spacing pad is arranged between the fourth blocking pad and the second flange disc, and the second flange disc is connected with the second wind blocking disc.
Preferably, the diameters of the first wind resistance disc and the second wind resistance disc are equal; the diameters of the first flange plate and the second flange plate are equal; the diameters of the first barrier pad, the second barrier pad, the third barrier pad and the fourth barrier pad are equal; the diameters of the first spacing pad, the second spacing pad, the third spacing pad and the fourth spacing pad are equal.
Preferably, the diameter of the flange plate is larger than that of the wind resistance plate; the diameter of the spacer is larger than that of the flange; the diameter of the spacer is greater than the diameter of the spacer.
Preferably, the second wind resistance disc is vertically provided with a first wind resistance piece; a second wind blocking piece is vertically arranged on the second flange plate; a third choke piece is vertically arranged on the fourth blocking pad; the third choke member is longer than the second choke member, and the second choke member is longer than the first choke member.
Preferably, the choke ring comprises a first choke part and a second choke part, the first choke part is connected with the drill rod, the drill rod comprises an inner tube, an outer tube is sleeved outside the inner tube, and the outer tube and the inner tube are assembled into a complete drill rod through a positioning device; the second wind resisting part is connected with the positive and negative joint, the positive and negative joint is provided with an inner interface, an outer interface is arranged outside the inner interface, the outer interface is connected with the medium conveying hole, and the medium conveying hole is connected with the down-the-hole hammer connecting port; the inner interface is connected with the diversion hole.
Preferably, the flow guide holes are formed in the side faces of the front connector and the back connector.
Preferably, the outer pipe comprises a first pipe body and internal and external threaded joints welded at two ends of the first pipe body.
Preferably, the inner pipe is composed of a second pipe body and sealing joints welded at two ends of the second pipe body.
The utility model has the advantages that:
1) the utility model relates to a choke ring for realizing reverse circulation drilling of a down-the-hole hammer, which adopts an annular space between a blocking outer pipe and a blocking inner pipe; the surface of the separation outer pipe is sleeved with the wind blocking disc, the wind blocking disc is connected with the flange disc, and the flange disc and the separation pad are connected in design and can be used for blocking high-pressure media and drilling slag cuttings from returning along an annular gap of the down-the-hole hammer and a drilled hole, keeping the pressure of the high-pressure media, and enabling the high-pressure media and the drilling slag cuttings to return from the central channel through the flow guide hole of the positive and negative connector, so that reverse circulation drilling of the down-the-hole hammer is realized.
2) The utility model relates to a choke ring for realizing reverse circulation drilling of a down-the-hole hammer, which adopts a second choke disc provided with a first choke piece; a second wind blocking piece is arranged on the second flange plate; a third choke piece is arranged on the fourth blocking pad; the third choke piece is longer than the second choke piece, and the second choke piece is longer than the first choke piece, so that the high-pressure medium and the drilling slag and rock debris can be further prevented from returning upwards along the annular gap of the down-the-hole hammer and the drilled hole, and the reverse circulation drilling of the down-the-hole hammer is better realized.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an embodiment of the present invention.
Wherein, 1 is a blocking inner pipe; 2 is a blocking outer pipe; 3 is a first wind resistance disc; 4 a second choke plate; 5 is a first flange plate; 6 is a second flange plate; 7 is a first barrier pad; 8 is a second barrier pad; 9 is a third barrier pad; 10 is a fourth barrier pad; 11 is a first spacer; 12 is a second spacer; 13 is a third spacer; 14 is a fourth spacer; 15 is a first choke; 16 is a second choke; 17 is a third choke; 18 is a first choke portion; 19 is a second choke; 20 is an annular space; 21 is a positive and negative joint; 211 is an external interface; 212 is an inner interface; 213 is a medium delivery hole; 214 flow guide holes; 215 is a down-the-hole hammer connection port.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in the figures, in order to solve the technical problem, the utility model provides a choke ring for realizing reverse circulation drilling of a down-the-hole hammer, which comprises a blocking inner pipe 1, wherein a blocking outer pipe 2 is sleeved outside the blocking inner pipe 1, and an annular space 20 is arranged between the blocking outer pipe 2 and the blocking inner pipe 1; the surface of the separation outer pipe 2 is sleeved with a wind resistance plate, the wind resistance plate is connected with a flange plate, and the flange plate is connected with a separation pad.
The flange plate, the blocking pad and the spacing pad are connected into a whole through bolts, and the blocking pad and the spacing pad are fixed outside the blocking outer tube 2.
The blocking pad has wear resistance and flexibility, and the diameter of the blocking pad is larger than the diameter of the drill hole, so that the blocking pad is used for blocking the high-pressure medium and the drill slag cuttings from returning upwards along the annular space, and the pressure of the high-pressure medium is maintained.
The positive and negative connector 21 plays a very important role in down-the-hole hammer drilling equipment, and is not only a key component for the up-down, but also the positive and negative circulation conversion. The positive and negative adapter 21 delivers high pressure air down the down-the-hole hammer through the media delivery hole 213. In addition, the outer interface 211 and the inner interface 212 of the positive and negative connector 21 are respectively matched with the blocking outer pipe 2 and the blocking inner pipe 1 of the choke ring for use, high-pressure media carrying rock debris and drilling slag are upwards guided into the central channel (the blocking inner pipe 1) through the flow guide holes 214, and the media conveying holes 213 and the flow guide holes 214 are independent and not communicated with each other. The size and number of the medium conveying holes 213 are matched with the input high-pressure air quantity. The size of the diversion hole 214 matches with the upper phase of the upper return rock debris drilling slag.
When the drill rod drills, the inner thread and the outer thread of the outer pipe are matched and screwed, the sealing joint of the inner pipe is connected in an inserting mode, the annular space of the inner pipe and the annular space of the outer pipe are used for conveying high-pressure air to the bottom of a hole, and the inner hole of the inner pipe returns to the ground surface to carry rock debris and drilling slag, so that reverse circulation drilling is achieved.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A choke ring for realizing reverse circulation drilling of a down-the-hole hammer comprises an inner blocking pipe (1) and is characterized in that: the blocking outer pipe (2) is sleeved outside the blocking inner pipe (1), and an annulus (20) is arranged between the blocking outer pipe (2) and the blocking inner pipe (1); the surface of the separation outer pipe (2) is sleeved with a wind resistance plate, the wind resistance plate is connected with a flange plate, and the flange plate is connected with a separation pad.
2. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 1, wherein: the choke disc comprises a first choke disc (3) and a second choke disc (4); the flange plates comprise a first flange plate (5) and a second flange plate (6); the barrier pads comprise a first barrier pad (7), a second barrier pad (8), a third barrier pad (9) and a fourth barrier pad (10); be equipped with the spacer between the ring flange of telling with the barrier pad, the spacer includes first spacer (11), second spacer (12), third spacer (13), fourth spacer (14).
3. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 2, wherein: first choke plate (3) with first ring flange (5) link to each other, first ring flange (5) with first barrier pad (7) link to each other, first barrier pad (7) with be provided with between second barrier pad (8) first spacer (11), second barrier pad (8) with be provided with between third barrier pad (9) second spacer (12), third barrier pad (9) with be provided with between fourth barrier pad (10) third spacer (13), fourth barrier pad (10) with be provided with between second ring flange (6) fourth spacer (14), second ring flange (6) with second choke plate (4) link to each other.
4. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 3, wherein: the diameters of the first wind resistance plate (3) and the second wind resistance plate (4) are equal; the diameters of the first flange plate (5) and the second flange plate (6) are equal; the diameters of the first barrier pad (7), the second barrier pad (8), the third barrier pad (9) and the fourth barrier pad (10) are equal; the diameters of the first spacing pad (11), the second spacing pad (12), the third spacing pad (13) and the fourth spacing pad (14) are equal.
5. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 4, wherein: the diameter of the flange plate is larger than that of the wind resistance plate; the diameter of the spacing pad is larger than that of the flange plate; the diameter of the blocking pad is larger than that of the spacing pad.
6. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 5, wherein: a first choke piece (15) is vertically arranged on the second choke plate (4); a second choke piece (16) is vertically arranged on the second flange plate (6); a third choke piece (17) is vertically arranged on the fourth barrier pad (10);
the third choke (17) is longer than the second choke (16), and the second choke (16) is longer than the first choke (15).
7. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 6, wherein: the wind resistance ring comprises a first wind resistance part (18) and a second wind resistance part (19), the first wind resistance part (18) is connected with the drill rod, the drill rod comprises an inner pipe, an outer pipe is sleeved outside the inner pipe, and the outer pipe and the inner pipe are assembled into a complete drill rod through a positioning device;
the second wind resisting part (19) is connected with a positive and negative joint (21), the positive and negative joint (21) is provided with an inner interface (212), an outer interface (211) is arranged outside the inner interface (212), the outer interface (211) is connected with a medium conveying hole (213), and the medium conveying hole (213) is connected with a down-the-hole hammer connecting port (215);
the inner interface (212) is connected with the diversion hole (214).
8. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 7, wherein: the diversion holes (214) are formed in the side faces of the front joint and the back joint (21).
9. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 8, wherein: the outer pipe comprises a first pipe body and internal and external threaded joints welded at two ends of the first pipe body.
10. A choke ring for reverse circulation drilling of a down-the-hole hammer as set forth in claim 9, wherein: the inner pipe comprises a second pipe body and sealing joints welded at two ends of the second pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920188835.2U CN209942733U (en) | 2019-02-10 | 2019-02-10 | Choke ring for realizing reverse circulation drilling of down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920188835.2U CN209942733U (en) | 2019-02-10 | 2019-02-10 | Choke ring for realizing reverse circulation drilling of down-the-hole hammer |
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| Publication Number | Publication Date |
|---|---|
| CN209942733U true CN209942733U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920188835.2U Active CN209942733U (en) | 2019-02-10 | 2019-02-10 | Choke ring for realizing reverse circulation drilling of down-the-hole hammer |
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| CN (1) | CN209942733U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445917A (en) * | 2021-08-03 | 2021-09-28 | 淮南矿业(集团)有限责任公司 | Implementation method of large-diameter life-saving hole |
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2019
- 2019-02-10 CN CN201920188835.2U patent/CN209942733U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445917A (en) * | 2021-08-03 | 2021-09-28 | 淮南矿业(集团)有限责任公司 | Implementation method of large-diameter life-saving hole |
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