CN209780755U - Rotary drilling bit fishing device - Google Patents

Abstract

The utility model provides a rotary drilling bit fishing device, which comprises a comb-shaped rotating head, a flat bamboo-cutting drill and an anchor 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. The utility model discloses a pectination turns round and the flat bamboo formula drill bit of cutting is cleared up the brill sediment in the well bore in earlier stage, makes the passageway in the well bore unobstructed, improves the success rate of salvaging soon to dig the brill drill bit by a wide margin. 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

Rotary drilling bit fishing device

Technical Field

the utility model relates to a bridge construction field, especially a dig soon and bore drill bit fishing device.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a dig soon and bore drill bit fishing device is provided, can improve to dig soon by a wide margin and bore the success rate that the drill bit was salvaged, reduce the construction degree of difficulty, reduce personnel's safety risk.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: 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;

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 utility model provides a pair of dig soon and bore drill bit fishing device through the scheme more than adopting, has following beneficial effect:

1. the utility model discloses a pectination turns round and the flat bamboo formula drill bit of cutting is cleared up the brill sediment in the well bore in earlier stage, makes the passageway in the well bore unobstructed, improves the success rate of salvaging soon to dig the brill drill bit by a wide margin.

2. the utility model provides a pectination is turned round clearance rubble and the clay that can be convenient and is bored the sediment, makes the wall of a well and digs soon and bores the drill bit and keep clean, avoids the adhesion.

3. the utility model provides a flat bamboo formula drill bit of cutting is particularly suitable for the clearance to dig the inner chamber of boring the drill bit soon, especially makes to dig soon and bores the drill bit inner chamber and collude the position and keep clean, avoids skidding in the successor work progress.

4. The utility model provides an anchor drill bit adopts the structure of internal stay, has overcome prior art and has dug soon and bore the little problem in clearance between drill bit and the wellhole inner wall, and ingenious adoption pressure mud as hydraulic oil, and the vaulting pole of drive anchor drill bit opens, supports the inner chamber of boring the drill bit soon, improves the success rate of salvaging by a wide margin.

5. the utility model discloses a method can reduce the artifical probability of going into the wellhole operation down by a wide margin, has also avoided the problem that appears collapsing hole, reaming and shrinkage cavity at the salvage in-process, has improved the success rate of salvage.

drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the device of the present invention.

Fig. 2 is the schematic diagram of the drill bit of the rotary drilling rig in the borehole.

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 the middle flat bamboo-cutting drill of the present invention.

fig. 5 is the utility model discloses well anchor drill bit goes into under to dig the structure sketch map when boring the drill bit inner chamber soon.

Fig. 6 is the structure diagram of the middle anchor drill bit support in the rotary drilling of the drill bit inner cavity.

fig. 7 is a schematic structural view of the anchor drill bit of the present invention when it is not supported.

Fig. 8 is a schematic view of the connecting position between the middle 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.

According to the preferable scheme, as shown in fig. 5 ~, the anchor type drill bit 5 is further included, the anchor type drill bit 5 is structurally characterized in that at least two axial stay bar grooves 56 penetrating through the outer wall are formed in a pipe body 51, each stay bar groove 56 is distributed along the circumference, a piston slide block 52 is arranged in the pipe body 51, the lower end of each stay bar 54 is hinged to the end of the pipe body 51, the upper end of a push rod 55 is hinged to the piston slide block 52, the lower end of each push rod 55 is hinged to the middle of the corresponding stay bar 54, and the top of the pipe body 51 is used for being connected with a drill rod 2.

Preferably, as shown in figure 5 ~ 7, the top end of the brace groove 56 is provided with a stop step 53 for stopping the brace 54, thereby providing a structure for receiving the brace 54 and maintaining 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.

the diameter of the circumscribed circle of the stay rod 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;

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 comprises 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 type bit 5;

Referring to fig. 1, in the scheme of the anchor drill bit 5 taking out, 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 before 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-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be considered 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 shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (9)

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 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 a drill rod (2), and water outlet holes are formed in the side wall or/and the bottom of the rotary head cylinder (61).

2. The rotary drilling bit fishing device according to claim 1, wherein: 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).

3. The rotary drilling bit fishing device according to claim 2, wherein: the bottom end of the cut bamboo sheet (71) is a curve or an oblique line, and the side edge of the cut bamboo sheet (71) close to the end extends outwards to form a step.

4. The rotary drilling bit fishing device according to any one of claims 1 ~ 3, further comprising an anchor bit (5), wherein the anchor bit (5) is structured such that a pipe body (51) is provided with at least two axial strut grooves (56) penetrating through an outer wall, each strut groove (56) is circumferentially distributed, a piston slider (52) is arranged in the pipe body (51), the lower end of the strut (54) is hinged to an end of the pipe body (51), the upper end of a push rod (55) is hinged to the piston slider (52), the lower end of the push rod is hinged to the middle of the strut (54), and the top of the pipe body (51) is used for being connected with the drill rod (2).

5. The rotary drilling bit fishing device according to claim 4, 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).

6. the rotary drilling bit fishing device according to claim 5, wherein: 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.

7. The rotary drilling bit fishing device according to claim 6, wherein: the swing angle of the stay bar (54) is larger than 90 degrees.

8. the rotary drilling bit fishing device according to claim 7, wherein: the diameter of the maximum circumcircle of the expanding rod (54) is larger than the inner diameter of the rotary drilling bit (8).

9. The rotary drilling bit fishing device according to any one of claims 1 ~ 3 and 5 ~ 8, wherein a steel wire rope of a winding device (11) is connected with a drill rod (2) after bypassing a guide wheel (10), 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).