CN220451771U

CN220451771U - Reverse reaming bit of reverse well drilling machine

Info

Publication number: CN220451771U
Application number: CN202322250953.0U
Authority: CN
Inventors: 吴小龙; 谢建华; 冉昊男
Original assignee: Chongqing Fenghan Construction Engineering Co ltd
Current assignee: Chongqing Fenghan Construction Engineering Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-02-06
Anticipated expiration: 2033-08-21

Abstract

In order to solve the technical problem of how to disassemble the reverse reaming bit, the utility model provides the reverse reaming bit of the reverse well drilling machine, which comprises a plurality of cutter holders arranged on a cutter head and reaming cutters arranged on each cutter holder, wherein each cutter holder comprises a fixed seat fixed on the cutter head and a movable seat detachably connected with the fixed seat, the inner side of the upper end of the fixed seat is provided with a connecting shaft, the other end of the connecting shaft is movably inserted on the movable seat, the reaming cutters are arranged on the connecting shaft in the cutter holder, the cutter holder of the cutter mechanism is divided into the movable seat and the fixed seat, the movable seat is detachably connected with the fixed seat, when the movable seat is separated from the fixed seat, the reaming cutters on the connecting shaft are detached after the movable seat is separated, the reaming cutters are maintained and replaced, and when the reaming cutters are required to be maintained and replaced, the whole drill bit is not required to be scrapped and discarded, and the cost is saved.

Description

Reverse reaming bit of reverse well drilling machine

Technical Field

The utility model relates to the technical field of a back-well drilling machine, in particular to a back-reaming bit of the back-well drilling machine.

Background

The reverse well drilling machine drives a hydraulic motor through a motor of the drilling machine, the hydraulic motor drives a water tap, torque is transmitted to a drilling tool system by utilizing hydraulic power, a drill rod and a drill bit are driven to rotate, and a hob on a pilot hole drill bit or a reamer bit performs pure rolling or micro sliding along a bottom hole rock working surface under the action of the weight of the drill bit. Meanwhile, axial pulling and pressure generated by the main engine oil cylinder also acts on the pilot hole drill bit or the reamer bit through the power head and the drill rod, so that the hob of the pilot hole drill bit rolls under the action of the drill pressure to generate impact load, and hob teeth generate impact, extrusion and shearing actions on the rock to crush the rock.

The construction of the well reversing drilling machine mainly comprises four stages: the preparation stage, the guide hole stage, the reaming stage and the ending stage, wherein the reaming stage is to remove the guide hole drill bit in the lower tunnel, connect the reverse reaming drill bit, and start the bottom-up reaming drilling process.

The drill bit generally comprises a cutter disc, a cutter holder and a hob, the cutter holder is arranged on the cutter disc, the hob is arranged on the cutter holder, the hob is generally of an annular cylinder structure and then is arranged on the cutter holder through a connecting column, the hob is often worn after the hob is drilled for a long time, the hob is inconvenient to replace, and once the hob is worn, the whole drill bit is directly scrapped, so that the operation cost of enterprises is increased.

Disclosure of Invention

In order to solve the technical problem of how to disassemble the reverse reaming bit, the utility model provides the reverse reaming bit of the reverse well drilling machine.

The utility model provides a reverse reaming bit of reverse well rig, includes the blade disc and installs the hobbing cutter mechanism on the blade disc, and hobbing cutter mechanism includes a plurality of blade holders of installing on the blade disc and the reaming hobbing cutter of installing on every blade holder, and the blade holder is including fixing the fixing base on the blade disc and the movable seat of dismantling the connection with the fixing base, and the fixing base upper end inboard is equipped with the connecting axle, and the connecting axle other end activity is pegged graft on the movable seat, and the reaming hobbing cutter is installed on the connecting axle in the blade holder.

Through the technical scheme, the cutter holder of the hob mechanism is divided into the movable seat and the fixed seat, the movable seat is detachably connected with the fixed seat, when the movable seat is detached, the movable seat is separated from the fixed seat, the reaming hob on the connecting shaft is taken down after the movable seat is separated, the reaming hob is maintained and replaced, when the reaming hob is required to be maintained and replaced, the cutter holder of the drill bit can be detached easily and quickly for maintenance and replacement, the whole drill bit is not required to be scrapped and discarded, and the cost is saved.

Further preferably, the movable seat comprises a sloping plate with a top inclined towards the fixed seat and a vertical plate connected with the bottom of the sloping plate, a slot for inserting a connecting shaft is arranged on the inner side of the sloping plate, a threaded hole is formed in the sloping plate corresponding to the slot, a threaded hole is also formed in one end, connected with the movable plate, of the connecting shaft, and the detachable connecting shaft and the movable seat are connected after the fixing bolt is screwed into the threaded holes of the sloping plate and the connecting shaft.

Through above technical scheme, when dismantling the reaming hobbing cutter from the connecting axle, only need take out after fixing bolt with movable seat and connecting axle separately, then take off the reaming hobbing cutter from the connecting axle can, dismantle simply, be convenient for maintain change connecting axle, blade holder and reaming hobbing cutter after dismantling, practice thrift the cost, need not be with whole blade holder and reaming hobbing cutter change and abandon.

Further preferably, the bottom of the vertical plate is provided with a plurality of fastening bolts for detachably connecting the vertical plate and the fixing seat.

Through above technical scheme, fastening bolt is to fixing base and riser fastening connection, when need dismantle, only needs the screw thread to take out fastening bolt, can separate fixing base and riser, then maintains the change to the blade holder, practices thrift the cost, and it is simple to dismantle.

Further preferably, the inner side of the top of the fixing seat is an inclined plane, the inclined angle of the inclined plane is the same as that of the inclined plate, and the height of the inclined plate is higher than that of the top of the fixing seat.

Through above technical scheme, the connecting axle slope installation of being convenient for to be convenient for reaming hobbing cutter slope installation is on the blade disc, and the effect is better when drilling.

Further preferably, the reaming hob comprises an outer ring sleeve and an inner ring sleeve; the middle outer surface of the inner ring sleeve is provided with external threads, and the middle inner surface of the outer ring sleeve is provided with internal threads which are in threaded connection with the external threads in a matched manner.

Through the technical scheme, when the reaming hob is disassembled, the outer ring sleeve and the inner ring sleeve can be disassembled and separated only by unscrewing the outer ring sleeve from the threads of the inner ring sleeve, the maintenance and the replacement of the outer ring sleeve and the inner ring sleeve are respectively carried out, the inner ring sleeve and the outer ring sleeve do not need to be integrally replaced together, and the cost is saved.

Further preferably, a clamping assembly is arranged in the inner ring sleeve, and the clamping assembly comprises an elastomer and a clamping piece which are respectively arranged on two opposite sides in the inner ring sleeve; the elastic body is arranged between the outer side of the clamping piece and the inner wall of the inner ring sleeve; the connecting shaft is connected between the two clamping pieces in a penetrating way; clamping strips are respectively arranged on two symmetrical sides of the connecting shaft; the inner side of the clamping piece is provided with a clamping groove matched and clamped with the clamping strip.

Through above technical scheme, the connecting axle is connected with the inner ring cover can be dismantled under the joint effect of mutually supporting of joint groove and joint strip, and the dismantlement maintenance of connecting axle and inner ring cover of being convenient for does not need to change connecting axle and reaming hobbing cutter together, practices thrift the cost.

Further preferably, the outer side of the inner ring sleeve is provided with a movable groove corresponding to the clamping piece and the elastic body respectively; the clamping piece comprises a semi-arc clamping part close to one end of the connecting shaft, the clamping groove is formed in the clamping part, the clamping piece further comprises a limiting part which is connected with the clamping part and is clamped in the movable groove after penetrating through the elastic body and the inner ring sleeve, one end of the limiting part in the movable groove is provided with a limiting rod, and the limiting rod is detachably connected with threads of the limiting part.

Through above technical scheme, clamping part is fixed to the connecting axle centre gripping, and spacing portion and gag lever post can be dismantled and be connected, and spacing portion and clamping part are taken out from the inner ring cover inboard behind the convenient to detach gag lever post, and it is convenient to dismantle, need not to change clamp piece, elastomer and inner ring cover are whole together, practices thrift the cost.

The utility model has the beneficial effects that:

1) The cutter holder of the hob mechanism is divided into the movable seat and the fixed seat, the movable seat is detachably connected with the fixed seat, when the movable seat is detached, maintained and replaced, the reaming hob on the connecting shaft is detached only by separating the movable seat from the fixed seat, the reaming hob is maintained and replaced, when the reaming hob needs to be maintained and replaced, the cutter holder of the drill bit can be detached easily and quickly for maintenance and replacement, the whole drill bit does not need to be scrapped and discarded, and the cost is saved.

2) When the reaming hob is to be disassembled, the outer ring sleeve is firstly stripped and then screwed out from the threads on the inner ring sleeve, the limiting rod is screwed out from the limiting part after screwed out, the limiting rod is taken out from the movable groove, and then the clamping part and the limiting part of the clamping part are taken out from the connecting channel to the inner side of the inner ring sleeve, so that the reaming hob is disassembled, maintained and replaced, and the reaming hob is convenient and simple to disassemble, and is convenient to maintain and saves the whole replacement cost after being disassembled.

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

fig. 1 is a schematic view of a back reamer of a back-well drilling rig of the present utility model.

FIG. 2 is a schematic cross-sectional view of a reamer of the present utility model.

Fig. 3 is an enlarged schematic view of the portion a of fig. 1 according to the present utility model.

Fig. 4 is an enlarged schematic view of the portion B of fig. 2 according to the present utility model.

The cutter comprises a cutter head 1, a cutter seat 2, a fixed seat 21, a movable seat 22, a sloping plate 221, a vertical plate 222, a slot 223, a 3-reaming hob 31, an outer ring sleeve 32, an inner ring sleeve 321, a movable slot 4, a connecting shaft 41, a clamping strip 41, a fastening bolt 5, a fixing bolt 6, a clamping assembly 7, an elastic body 71, a clamping piece 72, a clamping slot 721, a clamping part 722, a limiting part 723, a limiting rod 724 and a connecting channel 73.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Please refer to fig. 1-4

A reverse reaming bit of a reverse well drilling machine comprises a cutter head 1 and a hob mechanism. The drill rod is arranged in the center of the cutter head 1; the hob mechanism is arranged around a drill rod on the cutterhead 1, and comprises a plurality of tool holders 2 arranged around the drill rod on the cutterhead 1 and reaming hob 3 arranged on each tool holder 2, and a connecting shaft 4 is arranged in each tool holder 2; the reaming hob 3 is installed on the connecting shaft 4 in the tool apron 2, the outer surface of the reaming hob 3 is provided with a plurality of hob teeth, during use, the cutter head 1 is installed below a drill rod of the anti-well drilling machine, then the anti-well drilling machine is started, at the moment, the cutter head 1 moves upwards under the action of the anti-well drilling machine, the cutter head 1 and the hob mechanism are driven to rotate through the drill rod to generate impact load, the hob teeth on the reaming hob 3 impact rock, extrusion and shearing actions are carried out, the rock is broken, and the detailed working principle of the anti-well drilling machine is not repeated.

In this embodiment, the tool holder 2 includes an L-shaped fixing seat 21 and a movable seat 22 detachably connected to the fixing seat 21, the fixing seat 21 is fixed on the tool pan 1, the bottom side of the movable seat 22 is fixedly connected to the fixing seat 21 by a fastening bolt 5, one end of the connecting shaft 4 is fixedly mounted inside the upper end of the fixing seat 21, the movable seat 22 is moved to be close to the other end of the connecting shaft 4 after the fixing seat 21 and inserted into the movable seat 22, the top of the movable seat 22 is a sloping plate 221 sloping towards the fixing seat 21, the bottom of the movable seat 22 is a vertical plate 222, that is, the sloping plate 221 is fixedly connected to the top of the vertical plate 222, a slot 223 into which the connecting shaft 4 is inserted is formed inside the sloping plate 221, a threaded hole penetrating through is formed in the sloping plate 221 corresponding to the slot 223, a threaded hole is formed in the end of the connecting shaft 4 connected to the movable seat 22, after the connecting shaft 4 is screwed into the sloping plate 221 and the threaded hole of the connecting shaft 4 by the fixing bolt 6, the connecting shaft 4 is fixed to the movable seat 22, and the vertical plate 222 at the bottom of the movable seat 22 is fixedly connected to the fixing seat 21 by the fastening bolt 5.

Preferably, the inner side of the top of the fixed seat 21 is an inclined plane, the inclined angle of the inclined plane is the same as that of the inclined plate 221, and the height of the inclined plate 221 is higher than that of the top of the fixed seat 21, so that the connecting shaft 4 is convenient to be obliquely installed, and the reaming hob 3 is convenient to be obliquely installed on the cutterhead 1.

When the hob mechanism is needed to be replaced and maintained, the fastening bolts 5 on the outer side of the vertical plate 222 are removed firstly, then the fixing bolts 6 on the outer side of the inclined plate 221 are removed, the movable seat 22 is moved away from the fixed seat 21 after the fastening bolts 6 are removed, the movable seat 22 is separated from the fixed seat 21, the reaming hob 3 is taken out from the connecting shaft 4 after the movable seat 22 is separated from the fixed seat 21, and the reaming hob 3 is replaced and maintained.

In this embodiment, in order to facilitate disassembly and maintenance of the reaming hob 3, the reaming hob 3 includes an outer ring sleeve 31 and an inner ring sleeve 32; the outer ring sleeve 31 and the inner ring sleeve 32 are both cylindrical with a middle hole, the outer surface of the middle of the inner ring sleeve 32 is provided with an external thread, the inner surface of the middle of the outer ring sleeve 31 is provided with an internal thread, the external thread and the internal thread are matched to connect the outer ring sleeve 31 with the inner ring sleeve 32 in a threaded manner, the rest positions of the inner surface of the outer ring sleeve 31 and the outer surface of the inner ring sleeve 32 can be further fixed in an adhesive manner, when the hob teeth are arranged on the outer surface of the outer ring sleeve 31, the outer ring sleeve 31 and the inner ring sleeve 32 are separated through removing adhesive by removing adhesive.

In this embodiment, in order to facilitate clamping and dismounting of the connecting shaft 4, a clamping assembly 7 is provided in the inner ring sleeve 32, and the clamping assembly 7 includes an elastic body 71 and a clamping member 72 respectively mounted on two opposite sides in the inner ring sleeve 32; the elastic body 71 is arranged between the outer side of the clamping piece 72 and the inner wall of the inner ring sleeve 32; the connecting shaft 4 is connected between the two clamping pieces 72 in a penetrating way; clamping strips 41 are respectively arranged on two symmetrical sides of the connecting shaft 4; the inner side of the clamping piece 72 is provided with a clamping groove 721 matched and clamped with the clamping strip 41; the connecting shaft 4 is respectively inserted into and connected with the two clamping grooves 721 of the clamping piece 72 through the two clamping strips 41 to be clamped;

the outer side of the inner ring sleeve 32 is respectively provided with a movable groove 321 corresponding to the clamping piece 72 and the elastic body 71; the clamping member 72 includes a semi-arc clamping portion 722 near one end of the connecting shaft 4, a clamping groove 721 is disposed in the clamping portion 722, the clamping member 72 further includes a limiting portion 723 connected with the clamping portion 722 and passing through the elastic body 71 and the inner ring sleeve 32 and then being clamped in the movable groove 321, one end of the limiting portion 723 in the movable groove 321 is provided with a limiting rod 724, the limiting rod 724 is detachably connected with the limiting portion 723 in a threaded manner, the limiting rod 724 moves in the movable groove 321 and is limited by the movable groove 321, and it should be understood that the inner ring sleeve 32 and the elastic body 71 are provided with a connecting channel 73 through which the limiting portion 723 passes.

When the reamer 3 is to be disassembled, the outer ring sleeve 31 is firstly de-glued and then screwed out from the inner ring sleeve 32, the limiting rod 724 is screwed out from the limiting part 723 after the screwing out, the limiting rod 724 is taken out from the movable groove 321, and then the clamping part 722 and the limiting part 723 of the clamping part 72 are taken out from the connecting channel 73 to the inner side of the inner ring sleeve 32, so that the reamer 3 is disassembled, maintained and replaced.

In summary, although the present utility model has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model is defined by the appended claims.

Claims

1. A reverse reamer bit of a reverse well drilling machine, characterized in that: the cutter head comprises a cutter head (1) and a hob mechanism arranged on the cutter head (1), wherein the hob mechanism comprises a plurality of cutter holders (2) arranged on the cutter head (1) and reaming hob (3) arranged on each cutter holder (2), each cutter holder (2) comprises a fixing seat (21) fixed on the cutter head (1) and a movable seat (22) detachably connected with the fixing seat (21), a connecting shaft (4) is arranged on the inner side of the upper end of the fixing seat (21), the other end of the connecting shaft (4) is movably inserted on the movable seat (22), and the reaming hob (3) is arranged in the cutter holder (2) on the connecting shaft (4).

2. A reverse reamer bit of a reverse well drilling machine according to claim 1, wherein: the movable seat (22) comprises a sloping plate (221) with the top inclined towards the fixed seat (21) and a vertical plate (222) connected with the bottom of the sloping plate (221), a slot (223) for inserting the connecting shaft (4) is formed in the inner side of the sloping plate (221), a threaded hole penetrating through the sloping plate (221) corresponding to the slot (223), a threaded hole is formed in one end, connected with the movable seat (22), of the connecting shaft (4), and the connecting shaft (4) is detachably connected with the movable seat (22) after the sloping plate (221) is screwed into the threaded hole of the connecting shaft (4) through a set fixing bolt (6).

3. A reverse reamer bit of a reverse well drilling machine according to claim 2, wherein: the bottom of the vertical plate (222) is provided with a plurality of fastening bolts (5) which are used for detachably connecting the vertical plate (222) and the fixing seat (21).

4. A reverse reamer bit of a reverse well drilling machine according to claim 3, wherein: the inner side of the top of the fixed seat (21) is an inclined plane, the inclined plane is inclined at the same angle as the inclined plate (221), and the height of the inclined plate (221) is higher than that of the top of the fixed seat (21).

5. The back reamer of a back well drilling machine of claim 4, wherein: the reaming hob (3) comprises an outer ring sleeve (31) and an inner ring sleeve (32); the middle outer surface of the inner ring sleeve (32) is provided with an external thread, and the middle inner surface of the outer ring sleeve (31) is provided with an internal thread in threaded connection with the external thread in a matched mode.

6. A reverse reamer bit of a reverse well drilling machine according to claim 5, wherein: a clamping assembly (7) is arranged in the inner ring sleeve (32), and the clamping assembly (7) comprises an elastic body (71) and a clamping piece (72) which are respectively arranged on two opposite sides in the inner ring sleeve (32); the elastic body (71) is arranged between the outer side of the clamping piece (72) and the inner wall of the inner ring sleeve (32); the connecting shaft (4) is connected between the two clamping pieces (72) in a penetrating way; clamping strips (41) are respectively arranged on two symmetrical sides of the connecting shaft (4); the inner side of the clamping piece (72) is provided with a clamping groove (721) matched and clamped with the clamping strip (41).

7. The reverse reamer of the reverse well drilling machine of claim 6, wherein: the outer side of the inner ring sleeve (32) is provided with a movable groove (321) corresponding to the clamping piece (72) and the elastic body (71) respectively; the clamping piece (72) comprises a semi-arc clamping part (722) close to one end of the connecting shaft (4), the clamping groove (721) is formed in the clamping part (722), the clamping piece (72) further comprises a limiting part (723) which is connected with the clamping part (722) and penetrates through the elastic body (71) and the inner ring sleeve (32) to be clamped in the movable groove (321), one end of the limiting part (723) in the movable groove (321) is provided with a limiting rod (724), and the limiting rod (724) is detachably connected with the limiting part (723) through threads.