CN109973040B - Rotary drilling bit fishing device and construction method - Google Patents
Rotary drilling bit fishing device and construction method Download PDFInfo
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- CN109973040B CN109973040B CN201910355361.0A CN201910355361A CN109973040B CN 109973040 B CN109973040 B CN 109973040B CN 201910355361 A CN201910355361 A CN 201910355361A CN 109973040 B CN109973040 B CN 109973040B
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- rotary drilling
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- 238000005553 drilling Methods 0.000 title claims abstract description 130
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 32
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 32
- 241001330002 Bambuseae Species 0.000 claims description 32
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 32
- 239000011425 bamboo Substances 0.000 claims description 32
- 239000002002 slurry Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 1
- 239000013049 sediment Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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Classifications
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
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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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a rotary drilling bit fishing device and a construction method, comprising a comb-shaped rotating head, a flat bamboo-cutting type drill and an anchor type drill; in the comb-shaped rotary head, the lower end of a first high-pressure water through pipe is connected with a rotary head cylinder, rotary head iron nails or elastic steel wires distributed radially are arranged on the inner wall or the outer wall of the rotary head cylinder, the top end of the first high-pressure water through pipe is connected with a drill rod, and water outlet holes are formed in the side wall or/and the bottom of the rotary head cylinder. During construction, the comb-shaped rotary head removes drilling slag on the rotary drilling bit, and the flat bamboo-cutting type drill bit removes attachments in the rotary drilling bit; and the anchor type drill bit lifts out the rotary drilling drill bit. According to the invention, the comb-shaped rotary head and the flat bamboo-cutting type drill bit are used for cleaning the drilling slag in the well hole in the early stage, so that the passage in the well hole is smooth, and the success rate of salvaging the rotary drilling drill bit is greatly improved. The anchor type drill bit adopts an inner support structure, overcomes the problem that the gap between the rotary drilling drill bit and the inner wall of the well hole is small in the prior art, and greatly improves the fishing success rate.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a rotary drilling bit fishing device and a construction method.
Background
The bored pile foundation is widely applied in the current bridge construction process, particularly, the pile foundation design is generally a bridge construction mode of the bored pile foundation column under the condition of certain cross-river and urban soft foundation geological environmental factors, and as the pile foundation is a foundation part of the bridge construction, the pile foundation must be driven into a bearing stratum to provide stable bearing capacity.
The pile foundation bearing stratum is a hard rock stratum with deep penetration depth and stable geological condition. When the cast-in-situ bored pile is constructed, due to excessive consumption of the drill rod, the brittle fracture of the drill rod is caused, so that the accident that a drill bit is fractured and falls into a pile hole is easy to occur in the drilling process. A series of drilling rod salvaging measures are required to ensure the continuous construction of the cast-in-situ bored pile. During the fishing of the drill rod, manual launching is mainly adopted for fishing, generally, the underwater environment is severe, the launching depth is deep, the proportion of underwater slurry is too large, hole collapse risks exist in holes, the underwater vision is fuzzy, the underwater working time is long, the purpose of fishing the drill rod cannot be achieved frequently when the drill rod is launched once, multiple times of launching are needed, and great safety risks are caused to workers who launch the drill rod. If the drill rod is too thick due to the drilling sediment, the effect of successfully salvaging the drill rod can not be achieved by manual work under the condition that the drill bit is wrapped by the drilling sediment.
Chinese patent document CN101382049A describes a method for salvaging a drilling bucket gate of a rotary drilling rig, and salvaging is carried out by adopting a scheme similar to a steel wire cage; however, for the rotary drilling bit, the structure of the steel wire cage is difficult to be sleeved on the rotary drilling bit. Chinese patent document CN101382049A describes a drilling tool fishing device, which uses a structure similar to a hydraulic grab bucket to grab up the drilling tool, but the clearance between the rotary drilling bit and the inner wall of the borehole (9) is small, the grab bucket structure is difficult to operate, and the underground hydraulic supply of the borehole (9) is also difficult, and an additional hydraulic system needs to be configured. Chinese patent document CN204492730U describes a rotary drilling rig and a drilling bucket fishing device thereof, which hook a rotary drilling bit by using a barb structure, but the positioning of the scheme is difficult, and the drilling bucket can only be used for drilling buckets of specific models, and the drilling bucket can easily fall off during the lifting process. Therefore, a device and an integral scheme capable of greatly improving the salvaging success rate of the rotary drilling bit are needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rotary drilling bit salvaging device and a construction method, which can greatly improve the salvaging success rate of the rotary drilling bit, reduce the construction difficulty and reduce the safety risk of personnel.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a rotary drilling bit fishing device comprises a comb-shaped rotating head;
in the comb-shaped rotary head, the lower end of a first high-pressure water through pipe is connected with a rotary head cylinder, rotary head iron nails or elastic steel wires distributed radially are arranged on the inner wall or the outer wall of the rotary head cylinder, the top end of the first high-pressure water through pipe is connected with a drill rod, and water outlet holes are formed in the side wall or/and the bottom of the rotary head cylinder.
In a preferable scheme, the device further comprises a flat bamboo cutting type drill bit;
in the flat bamboo cutting type drill, the bamboo cutting sheets are fixedly connected with the second high-pressure water pipe, the bamboo cutting sheets are in sheet structures, and the bottom ends of the bamboo cutting sheets are pointed;
the top end of the second high-pressure water pipe is connected with the drill rod.
In the preferred scheme, the bottom end of the cut bamboo sheet is a curve or an oblique line, and the side edge of the cut bamboo sheet close to the end extends outwards to form a step.
In the preferred scheme, still include anchor drill bit, anchor drill bit's structure is: the pipe body is provided with at least two axial strut grooves penetrating through the outer wall, each strut groove is distributed along the circumference, a piston slide block is arranged in the pipe body, the lower end of each strut is hinged with the end of the pipe body, the upper end of a push rod is hinged with the piston slide block, the lower end of the push rod is hinged with the middle of each strut, and the top of the pipe body is used for being connected with a drill rod.
In the preferred scheme, the top end of the stay bar groove is provided with a limit step for limiting the stay bar;
the position where the stay bar is hinged with the end of the pipe body is provided with a spring so that the stay bar rotates upwards and is retracted into the stay bar groove.
In a preferable scheme, the supporting rod and the push rod are both of structures with bent lower ends, and the end of the push rod hinged with the supporting rod is of a fork-shaped structure.
In a preferred scheme, the swinging angle of the stay bar is larger than 90 degrees;
the diameter of the maximum circumscribed circle of the support rod is larger than the inner diameter of the rotary drilling bit.
In the preferred scheme, a steel wire rope of the winding device bypasses a guide wheel and then is connected with a drill rod, the guide wheel is installed at the top end of a drill rod support, and the outer wall of the drill rod is connected with a millstone drilling machine.
A construction method adopting the rotary drilling bit fishing device comprises the following steps:
s1, installing a drilling machine and a drill rod, wherein the lower end of the drill rod is fixedly connected with the comb-shaped rotating head, the top end of the drill rod is connected with a slurry pump, the slurry pump is started to circularly flush the drill rod and the drill bit by using a first high-pressure water pipe after the drill rod and the drill bit are lowered to the corresponding heights of the well hole in sections by a hoisting device, the millstone drilling machine drives the drill rod to integrally rotate, drilling slag on the rotary drilling drill bit is removed, and the whole drill rod is subjected to reduced pressure drilling and lifted in the flushing process;
s2, lifting the drill rod and the drill bit to the outside of the well in a segmented manner, replacing the lower end of the drill rod with a flat bamboo cutting type drill bit, connecting the top end of the drill rod with a slurry pump, lowering the drill rod and the drill bit to corresponding heights of a well hole by a hoisting device, starting the slurry pump, circularly washing by using a second high-pressure water pipe, driving the drill rod to integrally rotate by a grinding disc drilling machine, removing attachments in the rotary drilling drill bit by bamboo cutting sheets, cleaning the surface of the rotary drilling drill bit, and reducing the attachments;
s3, pulling the rotary drilling bit out of the well;
the rotary drilling bit is salvaged through the steps.
In a preferred scheme, in the step S3, the method for pulling out the rotary drilling bit comprises the steps of pulling out a barb tool, pulling out a reinforcement cage body, manually binding or pulling out an anchor type bit;
in the anchor type drill bit pulling-out scheme, the lower end of a drill rod is replaced by an anchor type drill bit, the top end of the drill rod is connected with a slurry pump, the drill rod and the drill bit are lowered into an inner cavity of a rotary drilling drill bit in a borehole in a segmented mode through a hoisting device, and the depth of the rotary drilling drill bit is obtained by the detection of a comb-shaped rotary head or a flat bamboo-cutting type drill bit in the prior art or is detected by a depth measuring hammer;
after the drill bit is in place, a slurry pump is started, a piston slide block moves downwards under the action of high-pressure slurry, a push rod opens a support rod, the support rod is supported on the inner wall of the rotary drilling drill bit and clamped tightly, the slurry pump maintains pressure, and a hoisting device hoists to lift the drill rod and the drill bit together with the rotary drilling drill bit in sections;
if the slurry pump is not in place, the slurry pump is started, the piston slide block moves downwards, the support rod can rotate through the support interval, the valve is switched to pump slurry in a reverse circulation mode, the support rod returns to the initial position, and the inner cavity of the rotary drilling bit is searched again; or when the stay bar can not return to the initial position, the whole drill rod is lifted, the stay bar is returned to the initial position, and the drill rod and the drill bit are lowered into the well hole section by section to find the inner cavity of the rotary drilling drill bit.
The rotary drilling bit fishing device and the construction method provided by the invention have the following beneficial effects by adopting the scheme:
1. according to the invention, the comb-shaped rotary head and the flat bamboo-cutting type drill bit are used for cleaning the drilling slag in the well hole in the early stage, so that the passage in the well hole is smooth, and the success rate of salvaging the rotary drilling drill bit is greatly improved.
2. The comb-shaped rotating head can conveniently clean broken stones and clay drilling slag, so that the well wall and a rotary drilling bit are kept clean, and adhesion is avoided.
3. The flat bamboo-cutting type drill bit is particularly suitable for cleaning the inner cavity of the rotary drilling drill bit, particularly keeps the hooking position of the inner cavity of the rotary drilling drill bit clean, and avoids slipping in the subsequent construction process.
4. The anchor type drill bit disclosed by the invention adopts an inner support structure, the problem that the gap between the rotary drilling drill bit and the inner wall of a well hole in the prior art is small is solved, pressure mud is skillfully adopted as hydraulic oil to drive the support rod of the anchor type drill bit to be opened and supported in the inner cavity of the rotary drilling drill bit, and the success rate of fishing is greatly improved.
5. The method of the invention can greatly reduce the operation probability of manually running into the well hole, also avoid the problems of hole collapse, hole expansion and hole shrinkage in the fishing process and improve the fishing success rate.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention.
FIG. 2 is a schematic diagram of a rotary drilling bit in a borehole according to the present invention.
Fig. 3 is a schematic structural view of the comb-shaped rotating head of the present invention.
FIG. 4 is a schematic structural view of a flat bamboo-cutting drill according to the present invention.
FIG. 5 is a schematic structural view of the anchor drill bit of the present invention being lowered into the inner cavity of the rotary drilling bit.
FIG. 6 is a schematic structural view of the anchor drill bit support in the rotary drilling of the inner cavity of the drill bit.
FIG. 7 is a schematic view of the anchor bit of the present invention when it is unsupported.
Fig. 8 is a front view of the connection position of the stay bar and the push rod according to the present invention.
In the figure: the drill rod support 1, the inner ring tripod 101, the ring 102, the supporting tripod 103, the drill rod 2, the disc drilling machine 3, the high-pressure water pipe 4, the anchor type drill bit 5, the pipe body 51, the piston slide block 52, the limiting step 53, the support rod 54, the push rod 55, the support rod groove 56, the comb-shaped rotary head 6, the rotary head barrel 61, the rotary head iron nail 62, the first high-pressure water pipe 63, the flat bamboo cutting type drill bit 7, the bamboo cutting sheet 71, the second high-pressure water pipe 72, the rotary drilling drill bit 8, the well hole 9, the guide wheel 10 and the winding device 11.
Detailed Description
Example 1:
as shown in fig. 3, a fishing device for a rotary drilling bit comprises a comb-shaped bit 6;
in the comb-shaped rotary head 6, the lower end of a first high-pressure water through pipe 63 is connected with a rotary head cylinder 61, rotary head iron nails 62 or elastic steel wires distributed radially are arranged on the inner wall or the outer wall of the rotary head cylinder 61, the top end of the first high-pressure water through pipe 63 is connected with the drill rod 2, and water outlet holes are formed in the side wall or/and the bottom of the rotary head cylinder 61. From this structure, the pectination is changeed 6 and is used for the drilling sediment in the clearance wellhole 9 and dig the drilling sediment and the clay that bore bit 8 surface soon, opens up reliable passageway for digging soon the salvage of boring bit 8. And can correct the defects of collapse holes and shrinkage holes. The swivel nails 62 or flexible wires are provided to break up the drill cuttings and to deliver them to the borehole 9 for circulation under the wash of high pressure mud. The elastic steel wire is used for brushing clay on the inner wall of the rotary drilling bit 8 or the well hole 9.
A preferred scheme is as shown in fig. 1 and 4, and further comprises a bamboo flat bamboo-cutting type drill bit 7;
in the flat bamboo cutting type drill bit 7, the cutting bamboo chips 71 are fixedly connected with the second high-pressure water through pipe 72, the specific cutting bamboo chips 71 and the second high-pressure water through pipe 72 are bound and fixed through a plurality of steel wires, the cutting bamboo chips 71 are in a sheet structure, and the bottom ends of the cutting bamboo chips 71 are sharp;
the top end of the second high-pressure water pipe 72 is connected with the drill rod 2. The bamboo flat bamboo cutting type drill bit 7 is mainly used for cleaning the inner cavity of the rotary drilling drill bit and exposing the working surface of subsequent construction.
In a preferred scheme, the bottom end of the cut bamboo piece 71 is a curve or an oblique line, and the side edge of the cut bamboo piece 71 close to the end extends outwards to form a step. Bamboo chips 71 are adopted as the drill bit, and 1 is made of easily-obtained materials. 2 is to avoid damaging the borehole 9 and the rotary drilling bit 8.
The preferable scheme is as in fig. 5-8, still include anchor drill bit 5, and anchor drill bit 5's structure is: the pipe body 51 is provided with at least two axial strut grooves 56 penetrating through the outer wall, each strut groove 56 is distributed along the circumference, a piston slide block 52 is arranged in the pipe body 51, the lower end of each strut 54 is hinged with the end of the pipe body 51, the upper end of a push rod 55 is hinged with the piston slide block 52, the lower end of each push rod 55 is hinged with the middle of each strut 54, and the top of the pipe body 51 is used for being connected with the drill rod 2. With the structure, the piston slide block 52 and the inner cavity of the tube body 51 form a mechanism similar to a hydraulic device, and the mechanism is used for opening the stay bar 54 through high-pressure mud, supporting the stay bar in the inner cavity of the rotary drilling bit 8, and being hooked by a protruding part of the inner cavity of the rotary drilling bit 8, such as a reinforcing rib, so that the rotary drilling bit 8 can be reliably fixed. Compared with other schemes, the anchor type drill bit 5 is easier to position, the requirement on positioning precision is not high, the rotary drilling drill bit 8 can be reliably fixed only by stretching into the inner cavity of the rotary drilling drill bit 8, and the success rate is very high. Further preferably, the number of the stay bar grooves 56 is 3 to 4, and the number of the corresponding stay bars 54 and push bars 55 is also 3 to 4, and the stay bars and the push bars are uniformly distributed along the circumference.
In a preferred scheme, as shown in fig. 5 to 7, a limiting step 53 for limiting a supporting rod 54 is arranged at the top end of a supporting rod groove 56; this arrangement, for receiving the strut 54, maintains the retracted position.
The position where the stay 54 is hinged with the end of the tube body 51 is provided with a spring so that the stay 54 is rotated upward and received in the stay groove 56. With this structure, it is convenient to automatically retract the stay 54 after the support fails. It is also convenient to maintain the stay 54 in a retracted state when lowering the anchor bit 5.
In a preferred scheme, the stay bar 54 and the push rod 55 are both of a structure with bent lower ends, and the end of the push rod 55 hinged with the stay bar 54 is of a fork-shaped structure.
In a preferred scheme, the swinging angle of the stay bar 54 is larger than 90 degrees; due to the structure, after the support fails, or other problems are encountered in the lifting process, the anchor type drill bit 5 can be separated from the rotary drilling drill bit 8 or other obstacles. So that the construction can be carried out again after the adjustment.
In a preferred scheme, the diameter of the circumscribed circle of the stay bar 54 which is expanded to the maximum is larger than the inner diameter of the rotary drilling bit 8. It should be noted that the high-pressure slurry mainly acts to open the struts 54, and the fixing effect mainly comes from the supporting force between the struts 54. When the end of the stay rod 54 contacts with the protruding structure of the inner cavity of the rotary drilling bit 8, the end of the stay rod 54 is forced downwards, the stay rod 54 is driven to be continuously opened, and the diameter of the circumscribed circle of the stay rod 54 which is opened to the maximum is larger than the inner diameter of the rotary drilling bit 8, so that the opening angle of the stay rod 54 is limited, and the rotary drilling bit 8 is reliably fixed.
Preferably, as shown in fig. 1, the guide wheel 10 is installed at the top end of the drill rod bracket 1, the steel wire rope of the winding device 11 is connected with the drill rod 2 after passing around the guide wheel 10, and the outer wall of the drill rod 2 is connected with the abrasive disc drilling machine 3. The drill rod support 1 adopts a structure that an inner ring tripod 101 and a support tripod 103 are connected, and a circular ring 102 is fixedly arranged outside the inner ring tripod 101 so as to provide reliable support. Wherein the hoisting device 11 provides the lifting drive of the drill rod 2 and the respective drill bit, the millstone drilling machine 3 provides the rotating drive of the drill rod 2 and the respective drill bit, and the guide wheel 10 is used for guiding. A mud pump is also provided for providing pressurized mud. And a mud circulation treatment system such as a mud circulation passage, a sedimentation tank, a mud tank and a filtering device.
Example 2:
a construction method adopting the rotary drilling bit fishing device comprises the following steps:
s1, installing a complete machine structure of the drilling machine comprising the drill rod bracket 1, the winding device 11 and the millstone drilling machine 3, wherein the drill rod 2 is installed in the guide wheel 10 in a sliding mode, and the drill rod 2 is a hollow drill rod with a standard section of 5m and a diameter of 12 cm. The lower end of a drill rod 2 is fixedly connected with a comb-shaped rotary head 6 through threads, the top end of the drill rod 2 is connected with a slurry pump, the drill rod and a drill bit are lowered to the corresponding height of a well hole 9 in a segmented mode through a hoisting device 11, the slurry pump is started to carry out circulating flushing through a first high-pressure water pipe 63, a grinding disc drilling machine 3 drives the drill rod to rotate integrally, drilling residues and viscous slurry in the well hole 9 above a rotary drilling drill bit 8 and on the surface of the rotary drilling drill bit 8 are removed, subsequent construction for lifting the rotary drilling drill bit 8 is facilitated, and the whole drill rod is subjected to pressure reduction drilling and lifting in the flushing process;
s2, lifting the drill rod and the drill bit to the outside of the well in a segmented manner, replacing the lower end of the drill rod 2 with a flat bamboo-cutting type drill bit 7, connecting the top end of the drill rod 2 with a mud pump, lowering the drill rod and the drill bit to the corresponding height of the well hole 9 by the hoisting device 11, starting the mud pump, circularly washing by using the second high-pressure water pipe 72, driving the drill rod to integrally rotate by the millstone drilling machine 3, removing attachments in the rotary drilling drill bit 8 by the bamboo-cutting sheets 71, cleaning the inner cavity surface of the rotary drilling drill bit 8, reducing the attachments and reducing the adhesive force between the drill bit and mud;
s3, lifting the rotary drilling bit 8 out of the well;
in a preferred scheme, in the step S3, the method for pulling out the rotary drilling bit 8 includes the steps of pulling out a tool in the prior art, such as a barb tool, pulling out a reinforcement cage tool, manually binding or pulling out the anchor bit 5 of the present invention;
referring to fig. 1, in the scheme of taking out the anchor drill bit 5, as shown in fig. 5-8, the lower end of a drill rod 2 is replaced by the anchor drill bit 5, the top end of the drill rod 2 is connected with a slurry pump, the drill rod and the drill bit are lowered into an inner cavity of a rotary drilling drill bit 8 in a well hole 9 in a segmented manner by a hoisting device 11, and the depth of the rotary drilling drill bit 8 is detected by a comb-shaped rotary head 6 or a flat bamboo-cutting drill bit 7 in the prior art or is detected by a depth measuring hammer;
after reaching the position in the inner cavity of the rotary drilling drill bit 8, starting a slurry pump, enabling the piston slide block 52 to move downwards under the action of high-pressure slurry, opening the stay rod 54 by the push rod 55, supporting the stay rod 54 on the inner wall of the rotary drilling drill bit 8 and clamping the same by a protruding structure in the inner cavity of the rotary drilling drill bit 8, such as a reinforcing rib, a stiffening ring and the like, maintaining pressure by the slurry pump, lifting the hoisting device 11, and lifting the drill rod and the drill bit segment together with the rotary drilling drill bit 8 out of the well hole 9;
if the mud pump is not in place, the mud pump is started, the piston slide block 52 moves downwards, and the stay rod 54 rotates through a support interval, wherein the support interval refers to a rotation interval of the stay rod 54 capable of supporting the inner cavity of the rotary drilling bit 8, and the rotation interval of the stay rod 54 is necessarily smaller than 90 degrees, namely smaller than an angle of the stay rod 54 perpendicular to the pipe body 51. The slurry is pumped in a reverse circulation mode through the valve switching mode, the stay bar 54 is made to return to the initial position, and the inner cavity of the rotary drilling bit 8 is searched again; or when the stay bar 54 can not return to the initial position, the whole drill rod is lifted, the stay bar 54 returns to the initial position, and the drill rod and the drill bit are lowered into the well hole 9 section again to search the inner cavity of the rotary drilling drill bit 8.
The rotary drilling bit is salvaged through the steps.
The above-described embodiments are merely preferred technical solutions of the present invention, and should not be construed as limitations of the present invention, and technical features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (5)
1. The utility model provides a dig soon and bore drill bit fishing device which characterized by: it comprises a comb-shaped rotating head (6);
in the comb-shaped rotary head (6), the lower end of a first high-pressure water through pipe (63) is connected with a rotary head cylinder (61), rotary head iron nails (62) or elastic steel wires distributed in a radial manner are arranged on the inner wall or the outer wall of the rotary head cylinder (61), the top end of the first high-pressure water through pipe (63) is connected with a drill rod (2), and water outlet holes are formed in the side wall or/and the bottom of the rotary head cylinder (61);
the bamboo cutting machine also comprises a flat bamboo cutting type drill bit (7); in the flat bamboo cutting type drill bit (7), the bamboo cutting sheets (71) are fixedly connected with the second high-pressure water pipe (72), the bamboo cutting sheets (71) are of a sheet structure, and the bottom ends of the bamboo cutting sheets (71) are pointed; the top end of the second high-pressure water pipe (72) is connected with the drill rod (2);
the bottom end of the cut bamboo strip (71) is a curve or an oblique line, and the side edge of the cut bamboo strip (71) close to the end is extended outwards to form a step;
still include anchor drill bit (5), the structure of anchor drill bit (5) is: the drill pipe is characterized in that at least two axial strut grooves (56) penetrating through the outer wall are formed in the pipe body (51), each strut groove (56) is distributed along the circumference, a piston slide block (52) is arranged in the pipe body (51), the lower end of a strut (54) is hinged with the end of the pipe body (51), the upper end of a push rod (55) is hinged with the piston slide block (52), the lower end of the push rod is hinged with the middle of the strut (54), and the top of the pipe body (51) is used for being connected with a drill pipe (2);
the support rod (54) and the push rod (55) are both of structures with bent lower ends, and the end of the push rod (55) hinged with the support rod (54) is of a fork-shaped structure.
2. The rotary drilling bit fishing device according to claim 1, wherein: the top end of the stay bar groove (56) is provided with a limit step (53) for limiting the stay bar (54);
a spring is arranged at the hinged position of the stay bar (54) and the end of the pipe body (51) so that the stay bar (54) rotates upwards and is received in the stay bar groove (56).
3. The rotary drilling bit fishing device according to claim 1, wherein: the swing angle of the stay bar (54) is more than 90 degrees;
the diameter of the maximum circumcircle of the expanding rod (54) is larger than the inner diameter of the rotary drilling bit (8).
4. The rotary drilling bit fishing device according to any one of claims 1 to 3, characterized in that: a steel wire rope of the winding device (11) bypasses a guide wheel (10) and then is connected with a drill rod (2), the guide wheel (10) is installed at the top end of a drill rod bracket (1), and the outer wall of the drill rod (2) is connected with a millstone drilling machine (3).
5. A construction method adopting the rotary drilling bit fishing device of any one of claims 1 to 4 is characterized by comprising the following steps: s1, installing a drilling machine and a drill rod (2), wherein the lower end of the drill rod (2) is fixedly connected with a comb-shaped rotating head (6), the top end of the drill rod (2) is connected with a slurry pump, the drill rod and the drill bit are lowered to corresponding heights of a well hole (9) in a segmented mode through a hoisting device (11), the slurry pump is started to be circularly flushed through a first high-pressure water pipe (63), the grinding disc drilling machine (3) drives the drill rod to rotate integrally, drilling slag on a rotary drilling bit (8) is removed, and the drill rod is drilled in a decompression mode and lifted integrally in the flushing process;
s2, lifting the drill rod and the drill bit to the outside of the well in a segmented manner, replacing the lower end of the drill rod (2) with a flat bamboo cutting type drill bit (7), connecting the top end of the drill rod (2) with a mud pump, lowering the drill rod and the drill bit into a well hole (9) in a segmented manner by a hoisting device (11), starting the mud pump, circularly washing by using a second high-pressure water pipe (72), driving the drill rod to rotate integrally by using a millstone drilling machine (3), removing attachments in the rotary drilling drill bit (8) by using bamboo cutting sheets (71), cleaning the surface of the rotary drilling drill bit (8), and reducing the attachments;
s3, lifting the rotary drilling bit (8) out of the well;
the method for pulling out the rotary drilling bit (8) comprises the steps of pulling out the barb tool, pulling out the reinforcement cage body, manually binding and pulling out or pulling out the anchor type bit (5); in the anchor type drill bit (5) pulling-out scheme, the lower end of a drill rod (2) is replaced by the anchor type drill bit (5), the top end of the drill rod (2) is connected with a slurry pump, the drill rod and the drill bit are lowered into an inner cavity of a rotary drilling bit (8) in a well hole (9) in a segmented mode through a hoisting device (11), and the depth of the rotary drilling bit (8) is detected by a previous comb-shaped rotary head (6) or a flat bamboo-cutting type drill bit (7) or is detected by a depth measuring hammer; after the drill rod and the drill bit are in place, a mud pump is started, the piston slide block (52) moves downwards under the action of high-pressure mud, the push rod (55) opens the support rod (54), the support rod (54) is supported on the inner wall of the rotary drilling drill bit (8) and is clamped tightly, the mud pump maintains pressure, and the hoisting device (11) is lifted to lift the drill rod and the drill bit section together with the rotary drilling drill bit (8); if the slurry pump is not in place, the slurry pump is started, the piston sliding block (52) moves downwards, the support rod (54) rotates through a support interval, the slurry is pumped in a reverse circulation mode through valve switching, the support rod (54) returns to the initial position, and the inner cavity of the rotary drilling bit (8) is searched again; or when the support rod (54) cannot return to the initial position, the whole drill rod is lifted, the support rod (54) returns to the initial position, and the drill rod and the drill bit are lowered into the well hole (9) section by section again to search for the inner cavity of the rotary drilling drill bit (8);
the rotary drilling bit is salvaged through the steps.
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Families Citing this family (11)
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| CN111827914B (en) * | 2020-06-11 | 2022-06-21 | 中铁大桥局集团第五工程有限公司 | Combined fishing tool and fishing method for deep water karst environment inclined percussion drill bit |
| CN112065272B (en) * | 2020-07-29 | 2023-11-07 | 无锡华夏中矿机电科技有限公司 | Modularized anchor rod unit of tunneling, anchoring and protecting integrated machine |
| CN111877300B (en) * | 2020-08-13 | 2021-08-10 | 中国建筑第八工程局有限公司 | Device is dragged for to stake hole rock specimen |
| CN111946288A (en) * | 2020-09-09 | 2020-11-17 | 中国石油天然气集团有限公司 | Drilling type male cone |
| CN113006726B (en) * | 2021-02-26 | 2023-04-14 | 中国一冶集团有限公司 | Adjustable lifting device for rapidly grabbing and dragging reinforcement cage in slurry hole |
| CN112973256B (en) * | 2021-04-25 | 2022-09-27 | 吉林省拓维环保集团股份有限公司 | Ecological soil sewage treatment plant |
| CN113389495B (en) * | 2021-07-28 | 2022-04-22 | 潍坊盛德石油机械制造有限公司 | PDC diamond bit capable of being salvaged while drilling |
| CN113775311B (en) * | 2021-09-23 | 2023-09-26 | 北京三一智造科技有限公司 | Fishing device and working machine |
| CN114439404B (en) * | 2022-01-24 | 2023-01-24 | 重庆运满机械设备有限公司 | Drill bit fisher of rotary drilling rig |
| CN114687673A (en) * | 2022-03-04 | 2022-07-01 | 国网四川省电力公司经济技术研究院 | Drill bit of rotary drilling rig |
| CN116816284B (en) * | 2023-08-30 | 2023-11-17 | 陕西炬烽建筑劳务有限公司 | Highway construction operation digs soon and bores device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101353953B (en) * | 2008-09-03 | 2011-07-20 | 安徽省地质矿产勘查局313地质队 | Loose stratum well pipe unfreezing device |
| CN201606036U (en) * | 2010-02-23 | 2010-10-13 | 黄国洲 | Steel brush scrapper component for cleaning and internally descaling oil pipe |
| CN204851145U (en) * | 2015-08-28 | 2015-12-09 | 中国神华能源股份有限公司 | Trip spear device |
| CN205225137U (en) * | 2015-12-14 | 2016-05-11 | 中铁十九局集团第二工程有限公司 | Dig drill bit salvage equipment that bores soon |
| CN205400678U (en) * | 2016-02-23 | 2016-07-27 | 北京市地质工程公司 | Geothermal well wall of a well purger |
| CN208416481U (en) * | 2018-09-20 | 2019-01-22 | 滨州市正宇石油技术有限公司 | A kind of downhole instrument fishing device |
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