CN107165572B - Matched drilling tool for implementing reverse circulation drilling by using forward circulation down-the-hole hammer and drilling method - Google Patents
Matched drilling tool for implementing reverse circulation drilling by using forward circulation down-the-hole hammer and drilling method Download PDFInfo
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- CN107165572B CN107165572B CN201710584567.1A CN201710584567A CN107165572B CN 107165572 B CN107165572 B CN 107165572B CN 201710584567 A CN201710584567 A CN 201710584567A CN 107165572 B CN107165572 B CN 107165572B
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
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Abstract
The invention relates to the technical field of drilling, in particular to a matched drilling tool for implementing reverse circulation drilling by using a forward circulation down-the-hole hammer and a drilling method. The invention discloses a matched drilling tool, which comprises a positive circulation down-the-hole hammer, an introduction device, a blocking device, a stabilizing device, a reverse circulation drilling rod and a drilling machine power head. The drilling method comprehensively utilizes the safety and high efficiency of the reverse circulation drilling process and the low cost and stability of the forward circulation down-the-hole hammer, and reduces the matching cost and the use cost of the drilling tool.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to a matched drilling tool for implementing reverse circulation drilling by using a forward circulation down-the-hole hammer and a drilling method.
Background
The air drilling is to drive the down-the-hole hammer to carry out drilling operation by using high-pressure air, and is an efficient drilling mode. The method can be divided into air forward circulation drilling and air reverse circulation drilling according to a circulation mode, the forward circulation drilling can be realized by using a common single-wall drill rod and a forward circulation down-the-hole hammer, high-pressure air is conveyed into the bottom of a well through an inner hole of a drill string, and is returned up through an annulus between the drill string and the wall of the drill hole after carrying rock debris. The reverse circulation drilling is realized by combining a double-wall drill rod and a reverse circulation down-the-hole hammer, high-pressure air is conveyed into the bottom of a well from an annular channel of the double-wall drill rod, flushing medium carrying rock scraps is returned from a central channel of the double-wall drill rod, in the process, the flushing medium carrying the rock scraps of the double-wall drill rod is directly led into the central channel of a drilling tool to be returned from the reverse circulation down-the-hole hammer, the upward return speed of the flushing medium is irrelevant to the caliber of the drilling hole, and the large-caliber drilling hole can be constructed. In addition, the hole wall is not washed by the upward medium, so that even if broken and collapsed stratum is encountered, the drilling can be smoothly implemented. However, the existing reverse circulation down-the-hole hammer technology is not mature enough, the manufacturing cost is high, the service life is short, and the double-wall drill rod and the reverse circulation down-the-hole hammer combined drilling tool have certain difficulty, so that a matched drilling tool and a drilling method for realizing reverse circulation drilling by using the forward circulation down-the-hole hammer to replace the reverse circulation down-the-hole hammer are developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a matched drilling tool and a drilling method for implementing reverse circulation drilling by using a forward circulation down-the-hole hammer, wherein the matched drilling tool has the advantages of simple structure, low manufacturing cost and good drilling effect; the method solves the problem that the reverse circulation drilling task cannot be completed by using the forward circulation down-the-hole hammer.
The invention provides a matched drilling tool for implementing reverse circulation drilling by using a positive circulation down-the-hole hammer, which is characterized in that: the drill power machine comprises a positive circulation down-the-hole hammer at the bottom end, an introduction device connected to the upper end of the positive circulation down-the-hole hammer, a blocking device connected to the upper end of the introduction device, a stabilizing device connected to the upper end of the blocking device, a plurality of reverse circulation drill pipes connected to the upper end of the stabilizing device, and a drill power machine head connected to the upper end of the drill pipes, wherein the drill power machine head comprises a rock debris total outlet and a medium inlet, the reverse circulation drill pipes, the stabilizing device and the blocking device are of an inner and outer sleeve structure, each reverse circulation drill pipe comprises a drill pipe inner pipe and a drill pipe outer pipe sleeved outside the drill pipe inner pipe, a drill pipe central channel is arranged in the center of each drill pipe inner pipe, and a drill pipe annular channel is arranged between each drill pipe inner pipe and each drill pipe outer pipe; the stabilizing device comprises a stabilizing inner tube, a stabilizing outer tube sleeved outside the stabilizing inner tube, and a stabilizing fin plate arranged outside the stabilizing outer tube, wherein a stabilizing device central channel is arranged in the center of the stabilizing inner tube, and a stabilizing device annular channel is arranged between the stabilizing outer tube and the stabilizing inner tube; the blocking device comprises a blocking inner tube, a blocking outer tube sleeved outside the blocking inner tube and a blocking disc arranged outside the blocking outer tube, wherein a blocking device central channel is arranged in the center of the blocking inner tube, and a blocking device annular channel is arranged between the blocking outer tube and the blocking inner tube; the guiding device is cylindrical, the guiding device is provided with a guiding hole, an annular pipeline connecting hole, a medium conveying hole and a down-the-hole hammer connecting hole, an upper opening of the guiding hole is positioned at the center of the upper end of the guiding device, a lower opening of the guiding hole is positioned on the side wall of the middle part of the guiding device, the annular pipeline connecting hole is sleeved on the periphery of the upper opening of the guiding hole, the down-the-hole hammer connecting hole is positioned at the center of the bottom end of the guiding device, the down-the-hole hammer connecting hole is communicated with the annular pipeline connecting hole through the medium conveying hole, and the guiding hole is not communicated with the annular pipeline connecting hole and the medium conveying hole; the diversion hole, the blocking device central channel, the stabilizing device central channel and the drill rod central channel are sequentially communicated with the rock debris total outlet to form a rock debris upward return channel; the medium inlet, the drill rod annulus channel, the stabilizing device annulus channel, the blocking device annulus channel, the annulus pipeline connecting hole, the medium conveying hole and the down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel.
As a further improvement of the technical scheme, the stabilizing fin plates are vertically distributed on the outer circumferential surface of the stabilizing outer tube, a plurality of alloy cutting heads are uniformly distributed on the outer end surface of the stabilizing fin plates, and reinforcing plates are arranged between adjacent stabilizing fin plates.
As a further improvement of the technical scheme, the blocking disc comprises a fixed flange plate fixed on the blocking outer tube, a blocking rubber mat arranged above the fixed flange plate and a movable flange plate arranged above the blocking rubber mat, wherein the blocking rubber mat is formed by superposing a plurality of pieces, and a spacing pad is arranged between adjacent blocking rubber mats, and the diameter of the spacing pad is smaller than that of the blocking rubber mat, so that the outer edge of the superposed blocking rubber mat is in a concave-convex tooth shape; the movable flange plate is connected with the separation rubber cushion, the spacing pad and the fixed flange plate into a whole through bolts and is used for fixing the separation rubber cushion and the spacing pad outside the separation outer pipe.
As a further improvement of the technical scheme, a plurality of stabilizing devices are further arranged at the middle connecting part of the reverse circulation drill rod.
As a further improvement of the technical scheme, a jet hole is arranged between the guide hole of the guiding device and the connecting hole of the down-the-hole hammer.
The invention further provides a drilling method for performing reverse circulation drilling by using the forward circulation down-the-hole hammer, which is characterized in that:
the method comprises the steps of assembling and connecting a positive circulation down-the-hole hammer with an introduction device, a blocking device, a stabilizing device, a reverse circulation drill rod and a power machine head of a drilling machine, and sequentially communicating a rock debris main outlet, a drill rod central channel, a stabilizing device central channel, a blocking device central channel and a diversion hole to form a rock debris reverse-upward channel; a medium inlet, a drill rod annulus channel, a stabilizing device annulus channel, a blocking device annulus channel, an annulus pipeline connecting hole, a medium conveying hole and a down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel; the leading-in device is used as a demarcation point, and reverse circulation is adopted above the leading-in device, namely, a central pipeline is an upward return channel, and an annular pipeline is a medium input channel; the leading-in device is positive circulation, namely a central pipeline of the positive circulation down-the-hole hammer is used as an input channel, and an annular gap between the positive circulation down-the-hole hammer and a drilled hole is used as a medium upward return channel; the high-pressure medium enters the medium input channel from the medium inlet and is conveyed to the positive circulation down-the-hole hammer, and the high-pressure medium is used as power to drive the positive circulation down-the-hole hammer to break rock for drilling; and the rock scraps and the high-pressure medium after rock breaking are blocked by the blocking device to return upwards along the positive circulation down-the-hole hammer and the drilling annular gap, and enter the guiding device through the guiding hole after being blocked by the blocking device, further return upwards along the upward reverse channel of the rock scraps, and are discharged from the total outlet of the rock scraps.
As a further improvement of the technical scheme, when the drilling depth is 80-150 meters, 1-2 stabilizing devices are additionally arranged in the middle of the reverse circulation drill rod; when the depth of the drilling hole is 150-250 meters, 2-4 stabilizing devices are additionally arranged in the middle of the reverse circulation drill rod so as to ensure the verticality of the drilling hole.
The invention installs the leading-in device in the matched drilling tool, the high pressure medium entering from the annular channel of the drill rod of the reverse circulation drill rod can directly enter the inner hole of the positive circulation down-the-hole hammer, the high pressure medium drives the hammer head of the positive circulation down-the-hole hammer to break the rock, the drill slag and rock bits are driven by the high pressure medium to return along the annular gap between the positive circulation down-the-hole hammer and the drill hole, and then enter the reverse channel of the bits to return from the diversion hole of the leading-in device after being blocked by the blocking device, thus realizing the reverse circulation drilling by the positive circulation down-the-hole hammer, the upward return speed of the high pressure medium and the drill slag and rock bits is not influenced by the caliber of the drill hole, the drill hole with large caliber can be constructed, the broken or collapsed stratum can be met, and the annular space has large cracks and the normal drilling can still be carried out.
The blocking rubber cushion of the blocking device is formed by superposing a plurality of pieces, and the spacing cushion is arranged between the adjacent blocking rubber cushions, so that the outer edge of the superposed blocking rubber cushion is in a concave-convex tooth shape, the friction force between the outer edge of the blocking rubber cushion and the wall of a drilling hole can be effectively reduced, and the blocking sealing effect of the blocking rubber cushion can be improved.
The method of the invention uses the positive circulation down-the-hole hammer to implement reverse circulation drilling, and solves the problem that no upward return channel in the positive circulation down-the-hole hammer can only implement positive circulation drilling. The safety and the high efficiency of the reverse circulation drilling process and the low cost and the stability of the forward circulation down-the-hole hammer are comprehensively utilized, and the matching cost and the use cost of the drilling tool are reduced.
Drawings
FIG. 1 is a schematic diagram of a drilling tool assembly for reverse circulation drilling with a forward circulation down-the-hole hammer according to the present invention;
FIG. 2 is a schematic view of the structure of the introduction device of the present invention;
FIG. 3 is a schematic view of a barrier device according to the present invention;
FIG. 4 is a schematic view of a stabilization device according to the present invention;
FIG. 5 is a schematic view of the reverse circulation drill pipe structure of the present invention;
the reference numerals in the figures are: 1, a positive circulation down-the-hole hammer; 2, leading in the device; 3 a blocking device; 4, stabilizing device; 5, reversely circulating the drill rod; 6, a power machine head of the drilling machine; 21 deflector holes; 22 annulus line connection holes; 23 medium delivery holes; 24 down-the-hole hammer connecting holes; 25 jet holes; 31 blocking the inner tube; 32 blocking the outer tube; 33 blocking the device central passage; 34 blocking device annulus passage; 35 blocking disk; 351 fixing the flange plate; 352 blocking the rubber pad; 353 a removable flange plate; 354 spacers; 41 stabilizing the inner tube; 42 stabilizing the outer tube; 43 stabilizing the device central passage; 44 stabilizing the device annulus passage; 45 stabilizing the fin plate; a 46 alloy cutting head; 47 stiffener plates; 51 drill pipe inner pipe; 52 drill pipe outer pipe; 53 drill pipe central passage; 54 drill pipe annulus passages; 61 total cuttings outlet; 62 medium inlet.
Detailed Description
In order to make the technical features, objects and effects of the present invention more clearly understood, the following detailed description of specific embodiments, structures and features of the present invention will be given with reference to the accompanying drawings and preferred embodiments. In addition, while the foregoing description of the embodiments will be presented for purposes of illustration and description, it should be appreciated that a number of embodiments and implementations of the invention may be utilized in a more detailed manner, and are not intended to be limiting.
Referring to fig. 1 to 5, the present invention provides a mating drilling tool for performing reverse circulation drilling with a forward circulation down-the-hole hammer, comprising a forward circulation down-the-hole hammer 1 at the bottom end, an introduction device 2 connected to the upper end of the forward circulation down-the-hole hammer, a blocking device 3 connected to the upper end of the introduction device, a stabilizing device 4 connected to the upper end of the blocking device, a plurality of reverse circulation drill pipes 5 connected to the upper end of the stabilizing device, and a drill power head 6 connected to the upper end of the drill pipes, wherein the drill power head is provided with a cuttings total outlet 61 and a medium inlet 62; the reverse circulation drill rod, the first stabilizing device and the blocking device are of an inner sleeve and an outer sleeve structure, and the inner sleeve and the outer sleeve are fixed by a fixing part conventionally, so that no relative movement between the inner sleeve and the outer sleeve is ensured; the reverse circulation drill rod 5 comprises a drill rod inner pipe 51 and a drill rod outer pipe 52 sleeved outside the drill rod inner pipe, wherein a drill rod central channel 53 is arranged in the center of the drill rod inner pipe, and a drill rod annular channel 54 is arranged between the drill rod inner pipe and the drill rod outer pipe; the stabilizing device 4 comprises a stabilizing inner tube 41, a stabilizing outer tube 42 sleeved outside the stabilizing inner tube, and a stabilizing fin plate 45 arranged outside the stabilizing outer tube, wherein a stabilizing device central passage 43 is arranged in the center of the stabilizing inner tube, and a stabilizing device annular passage 44 is arranged between the stabilizing outer tube and the stabilizing inner tube; the stabilizing fin plates are vertically distributed on the outer circumferential surface of the stabilizing outer tube, a plurality of alloy cutting heads 46 are evenly distributed on the outer end surface of the stabilizing fin plates, and reinforcing plates 47 are arranged between adjacent stabilizing fin plates. The size of the stabilizing fin plate is generally set according to the diameter of the drilled hole, and the diameter of the circular arc formed by the outer end surface of the stabilizing fin plate is slightly smaller than the diameter of the drilled hole. The stabilizing device 4 not only plays a role in centralizing and keeping straight of drilling, but also can be used as a counterweight drill collar.
The blocking device 3 comprises a blocking inner tube 31, a blocking outer tube 32 sleeved outside the blocking inner tube, and a blocking disc 35 arranged outside the blocking outer tube, wherein a blocking device central channel 33 is arranged in the center of the blocking inner tube, and a blocking device annular channel 34 is arranged between the blocking outer tube and the blocking inner tube; the blocking disc comprises a fixed flange plate 351 fixed on the blocking outer tube, a blocking rubber cushion 352 arranged above the fixed flange plate and a movable flange plate 353 arranged above the blocking rubber cushion, wherein the blocking rubber cushion 352 is formed by overlapping a plurality of pieces, a spacing pad 354 is arranged between adjacent blocking rubber cushions, and the diameter of the spacing pad is smaller than that of the blocking rubber cushion, so that the outer edge of the overlapped blocking rubber cushion is in a concave-convex tooth shape; the movable flange plate is connected with the separation rubber cushion, the spacing pad and the fixed flange plate into a whole through bolts and is used for fixing the separation rubber cushion and the spacing pad outside the separation outer pipe; the blocking rubber pad 352 has the same diameter as the drilling hole or slightly larger than the drilling hole, and is used for blocking high-pressure medium and drill slag cuttings from returning upwards along the annular gap of the positive circulation down-the-hole hammer and the drilling hole, keeping the pressure of the high-pressure medium, and enabling the high-pressure medium and the drill slag cuttings to enter the cuttings up-return channel from the guide hole of the guiding device, so that the implementation of reverse circulation drilling by the positive circulation down-the-hole hammer is realized.
The guiding device 2 is in a cylindrical shape so as to be matched with a reverse circulation drill rod, the guiding device is provided with a guiding hole 21, an annular space pipeline connecting hole 22, a medium conveying hole 23 and a down-the-hole hammer connecting hole 24, an upper opening of the guiding hole is positioned at the center of the upper end of the guiding device, a lower opening of the guiding hole is positioned on the side wall of the middle part of the guiding device, the upper opening of the guiding hole is used for being connected with a central passage of a blocking device, an annular space pipeline connecting hole ring 22 is sleeved on the periphery of the upper opening of the guiding hole and is used for being connected with the annular space passage 34 of the blocking device, the down-hole hammer connecting hole is positioned at the center of the bottom end of the guiding device, the down-hole hammer connecting hole 24 is communicated with the annular space pipeline connecting hole 22 through the medium conveying hole 23, and the guiding hole is not communicated with the annular space pipeline connecting hole and the medium conveying hole; the diversion hole, the blocking device central channel, the stabilizing device central channel and the drill rod central channel are sequentially communicated with the rock debris total outlet to form a rock debris upward return channel; the medium inlet, the drill rod annulus channel, the stabilizing device annulus channel, the blocking device annulus channel, the annulus pipeline connecting hole, the medium conveying hole and the down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel. In order to facilitate the upward return of the high pressure medium and the drill slag cuttings, the lower half of the pilot hole extends obliquely downward to the side wall in the middle of the pilot device. In order to smoothly return the high pressure medium and the drill slag cuttings, a jet hole 25 is arranged between the guide hole of the guiding device and the connecting hole of the down-the-hole hammer for guiding and intervening the high pressure medium and the drill slag cuttings.
The positive circulation down-the-hole hammer 1 is assembled and connected with the leading-in device 2, the blocking device 3, the stabilizing device 4, the reverse circulation drill rod 5 and the power machine head 6 of the drilling machine, and a rock debris upward reverse channel is formed by sequentially communicating a rock debris main outlet, a drill rod central channel, a stabilizing device central channel, a blocking device central channel and a diversion hole; a medium inlet, a drill rod annulus channel, a stabilizing device annulus channel, a blocking device annulus channel, an annulus pipeline connecting hole, a medium conveying hole and a down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel; the leading-in device is used as a demarcation point, and reverse circulation is adopted above the leading-in device, namely, a central pipeline is an upward return channel, and an annular pipeline is a medium input channel; the leading-in device is positive circulation, namely a central pipeline of the positive circulation down-the-hole hammer is used as an input channel, and an annular gap between the positive circulation down-the-hole hammer and a drilled hole is used as a medium upward return channel; the high-pressure medium enters the medium input channel from the medium inlet and is conveyed to the positive circulation down-the-hole hammer, and the high-pressure medium is used as power to drive the positive circulation down-the-hole hammer to break rock for drilling; the drill slag and rock scraps generated in the drilling process and high-pressure medium for finishing work are returned upwards from the annular gap between the positive circulation down-the-hole hammer and the drilled hole, blocked by the blocking disc 35, blocked by the blocking device, enter the diversion hole of the guiding device, enter the guiding device through the diversion hole, further return upwards along the upward reverse channel of the rock scraps, and are discharged from the total outlet of the rock scraps. Thus realizing reverse circulation drilling by using the forward circulation down-the-hole hammer. The outer pipes of the drilling machine power machine head 6, the reverse circulation drill rod 5, the stabilizing device 4, the blocking device 3 and the guiding device 2 are in male-female threaded connection, the inner pipe adopts a splicing mode, and a plurality of stabilizing devices can be installed between the reverse circulation drill rod 5 and the blocking device 3 along with the increase of the length of the reverse circulation drill rod 5. When the drilling depth is 100 meters, 2 stabilizing devices are additionally arranged in the middle of the reverse circulation drill rod; when the drilling depth is 200 meters, 4 stabilizing devices are additionally arranged in the middle of the reverse circulation drill rod, so that the verticality of the drilling is ensured.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (7)
1. A matched drilling tool for implementing reverse circulation drilling by using a forward circulation down-the-hole hammer is characterized in that: the drill power machine comprises a positive circulation down-the-hole hammer at the bottom end, an introduction device connected to the upper end of the positive circulation down-the-hole hammer, a blocking device connected to the upper end of the introduction device, a stabilizing device connected to the upper end of the blocking device, a plurality of reverse circulation drill pipes connected to the upper end of the stabilizing device, and a drill power machine head connected to the upper end of the drill pipes, wherein the drill power machine head comprises a rock debris total outlet and a medium inlet, the reverse circulation drill pipes, the stabilizing device and the blocking device are of an inner and outer sleeve structure, each reverse circulation drill pipe comprises a drill pipe inner pipe and a drill pipe outer pipe sleeved outside the drill pipe inner pipe, a drill pipe central channel is arranged in the center of each drill pipe inner pipe, and a drill pipe annular channel is arranged between each drill pipe inner pipe and each drill pipe outer pipe; the stabilizing device comprises a stabilizing inner tube, a stabilizing outer tube sleeved outside the stabilizing inner tube, and a stabilizing fin plate arranged outside the stabilizing outer tube, wherein a stabilizing device central channel is arranged in the center of the stabilizing inner tube, and a stabilizing device annular channel is arranged between the stabilizing outer tube and the stabilizing inner tube; the blocking device comprises a blocking inner tube, a blocking outer tube sleeved outside the blocking inner tube and a blocking disc arranged outside the blocking outer tube, wherein a blocking device central channel is arranged in the center of the blocking inner tube, and a blocking device annular channel is arranged between the blocking outer tube and the blocking inner tube; the guiding device is cylindrical, the guiding device is provided with a guiding hole, an annular pipeline connecting hole, a medium conveying hole and a down-the-hole hammer connecting hole, an upper opening of the guiding hole is positioned at the center of the upper end of the guiding device, a lower opening of the guiding hole is positioned on the side wall of the middle part of the guiding device, the annular pipeline connecting hole is sleeved on the periphery of the upper opening of the guiding hole, the down-the-hole hammer connecting hole is positioned at the center of the bottom end of the guiding device, the down-the-hole hammer connecting hole is communicated with the annular pipeline connecting hole through the medium conveying hole, and the guiding hole is not communicated with the annular pipeline connecting hole and the medium conveying hole; the diversion hole, the blocking device central channel, the stabilizing device central channel and the drill rod central channel are sequentially communicated with the rock debris total outlet to form a rock debris upward return channel; the medium inlet, the drill rod annulus channel, the stabilizing device annulus channel, the blocking device annulus channel, the annulus pipeline connecting hole, the medium conveying hole and the down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel.
2. The drilling tool set for reverse circulation drilling by using the forward circulation down-the-hole hammer according to claim 1, wherein the stabilizing fin plates are vertically distributed on the outer circumferential surface of the stabilizing outer tube, a plurality of alloy cutting heads are uniformly distributed on the outer end surface of the stabilizing fin plates, and reinforcing plates are arranged between the adjacent stabilizing fin plates.
3. The matched drilling tool for performing reverse circulation drilling by using the forward circulation down-the-hole hammer according to claim 1, wherein the blocking disc comprises a fixed flange plate fixed on the blocking outer tube, a blocking rubber mat arranged above the fixed flange plate and a movable flange plate arranged above the blocking rubber mat, the blocking rubber mat is formed by overlapping a plurality of pieces, a spacing pad is arranged between adjacent blocking rubber mats, the diameter of the spacing pad is smaller than that of the blocking rubber mat, and the outer edge of the overlapped blocking rubber mat is in a concave-convex tooth shape; the movable flange plate is connected with the separation rubber cushion, the spacing pad and the fixed flange plate into a whole through bolts and is used for fixing the separation rubber cushion and the spacing pad outside the separation outer pipe.
4. A matched drilling tool for performing reverse circulation drilling by using a forward circulation down-the-hole hammer as set forth in claim 1, wherein a plurality of stabilizing devices are further installed at the middle connection of the reverse circulation drill pipe.
5. A matched drilling tool for performing reverse circulation drilling by using a positive circulation down-the-hole hammer as set forth in claim 1, wherein a jet hole is provided between the guide hole of the lead-in device and the connecting hole of the down-the-hole hammer.
6. The drilling method of the matched drilling tool for performing reverse circulation drilling by using the forward circulation down-the-hole hammer, which is characterized in that the forward circulation down-the-hole hammer is assembled and connected with an introduction device, a blocking device, a first stabilizing device, a reverse circulation drill rod and a power machine head of the drilling machine, and a rock debris total outlet, a drill rod central channel, a stabilizing device central channel, a blocking device central channel and a diversion hole are sequentially communicated to form a rock debris upper reverse channel; a medium inlet, a drill rod annulus channel, a stabilizing device annulus channel, a blocking device annulus channel, an annulus pipeline connecting hole, a medium conveying hole and a down-the-hole hammer connecting hole are sequentially communicated to form a medium input channel; the leading-in device is used as a demarcation point, and reverse circulation is adopted above the leading-in device, namely, a central pipeline is an upward return channel, and an annular pipeline is a medium input channel; the leading-in device is positive circulation, namely a central pipeline of the positive circulation down-the-hole hammer is used as an input channel, and an annular gap between the positive circulation down-the-hole hammer and a drilled hole is used as a medium upward return channel; the high-pressure medium enters the medium input channel from the medium inlet and is conveyed to the positive circulation down-the-hole hammer, and the high-pressure medium is used as power to drive the positive circulation down-the-hole hammer to break rock for drilling; and the rock scraps and the high-pressure medium after rock breaking are blocked by the blocking device to return upwards along the positive circulation down-the-hole hammer and the drilling annular gap, and enter the guiding device through the guiding hole after being blocked by the blocking device, further return upwards along the upward reverse channel of the rock scraps, and are discharged from the total outlet of the rock scraps.
7. The drilling method of the matched drilling tool for performing reverse circulation drilling by using the forward circulation down-the-hole hammer, according to claim 6, wherein 1-2 stabilizing devices are additionally arranged in the middle of the reverse circulation drilling rod when the drilling depth is 80-150 meters; when the depth of the drilling hole is 150-250 meters, 2-4 stabilizing devices are additionally arranged in the middle of the reverse circulation drill rod so as to ensure the verticality of the drilling hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710584567.1A CN107165572B (en) | 2017-07-18 | 2017-07-18 | Matched drilling tool for implementing reverse circulation drilling by using forward circulation down-the-hole hammer and drilling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710584567.1A CN107165572B (en) | 2017-07-18 | 2017-07-18 | Matched drilling tool for implementing reverse circulation drilling by using forward circulation down-the-hole hammer and drilling method |
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| CN107165572A CN107165572A (en) | 2017-09-15 |
| CN107165572B true CN107165572B (en) | 2023-09-19 |
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| CN107724970A (en) * | 2017-11-07 | 2018-02-23 | 北京泰利新能源科技发展有限公司 | A kind of down-hole hammer crossover sub, down-hole hammer drilling rod and down-hole hammer |
| CN109915087B (en) * | 2019-04-01 | 2021-04-30 | 中煤科工集团西安研究院有限公司 | Subsection large-diameter sieve tube in coal mine underground directional long drill hole and running method thereof |
| CN115059462B (en) * | 2020-04-10 | 2023-02-14 | 中国地质科学院探矿工艺研究所 | Technological method of air reverse circulation continuous sampling drilling system |
| CN113863879B (en) * | 2020-06-30 | 2023-07-21 | 中国石油化工股份有限公司 | Gas reverse circulation well drilling is with diverging device |
| CN114704211A (en) * | 2022-03-28 | 2022-07-05 | 中煤科工集团重庆研究院有限公司 | Full-hole straightening drilling tool assembly and hole forming method |
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