CN209990445U

CN209990445U - Self-centering concentric pipe following drilling tool

Info

Publication number: CN209990445U
Application number: CN201920581595.2U
Authority: CN
Inventors: 文泓润
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-01-24
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a self-centering concentric pipe-following drilling tool, which relates to the technical field of drilling equipment, and mainly comprises a central head, a hole expanding sheet and a rod stabilizer; the center head is matched with a corresponding hole of the rod stabilizer through a tail triangular prism-shaped shaft, a flat column-shaped shaft or a multi-spline-shaped shaft to transmit torque, and the hole expanding sheets are uniformly distributed between the concave center head and the rod stabilizer, are arranged in a groove on the plane in the triangular prism-shaped shaft, the flat column-shaped shaft or the multi-spline-shaped shaft of the rod stabilizer through a hole expanding sheet tail rotating shaft lug and are locked by a positioning pin and a split pin. During working, the concave center head is stressed to move towards the direction of the rod stabilizer, meanwhile, the inclined surface of the concave center head extrudes the hole expanding sheet to be expanded outwards to form hole expanding, the drilling tool moves backwards after working, the hole expanding sheet is stressed to be automatically withdrawn, the middle of the concave center head is concave, the centering effect of the drilling tool is improved, the number of alloy column teeth used for expanding the holes by the hole expanding sheet is large, and the drilling speed is high.

Description

Self-centering concentric pipe following drilling tool

Technical Field

The utility model relates to a drilling equipment technical field especially relates to a from concentric drilling tool with pipe of centering.

Background

Most of downhole drilling tools are eccentric casing following drilling tools, the reaming is larger than the outer diameter of a casing pipe in the drilling process, the drilling tools need to be reversed when being recovered, the torque force is large, the formed holes are not round, the breakage rate is low, the formed holes are not perpendicular, the casing pipe resistance is large, and the casing pipe are easy to break.

Patent document No. 200620035767.9 discloses an air hammer down-hole concentric following drill, which solves the problems of eccentric drilling tools and the like, but easily drops and early wears the expanding drill bit.

Similar to patent application No. CN109083601, a lateral telescopic drilling tool is disclosed, in which a curve control groove arranged on a drill bit and a cylindrical pin on a reamer bit are easy to deform after use, so that the reamer bit is easy to withdraw, and needs to be reversed after completion, which causes a reliability problem.

And patent document CN201210410945.1, which is similar to the above, discloses a concentric slide block casing drill, a center drill bit and a pilot. The structural form of the hole centering device has the problems of poor centering effect and the like, and the hole is easy to deflect.

Disclosure of Invention

For solving above technical problem, the utility model provides a from concentric heel pipe drilling tool of centering to solve current drilling tool and fall reaming piece, disconnected reaming piece, reaming piece wear-resisting, the pore-forming is out of round, centering effect is not good beat the scheduling problem easily.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a self-centering concentric pipe-following drilling tool, which comprises a rod stabilizer, a center head and a plurality of hole expanding sheets; stabilizer bar one end is provided with connecting portion, the stabilizer bar other end is provided with one and holds the chamber, the center head set up in hold the intracavity, a plurality of reaming pieces set up in hold the intracavity just a plurality of reaming pieces set up in the center head with between the stabilizer bar.

Optionally, the rod stabilizer is a rod-shaped body.

Optionally, the connecting part is a spline; and/or the accommodating cavity comprises a polygonal hole in the middle and limiting holes arranged around the polygonal hole; the number of the sides of the polygonal hole is the same as the number of the reaming sheets; the hole expanding sheet is arranged in the limiting hole, wherein the polygonal hole is a triangular prism-shaped hole.

Optionally, the limiting hole includes a first groove and round lug grooves disposed on two sides of the first groove.

Optionally, the central head includes a concave head and a polygonal column, and the polygonal column is disposed at one end of the concave head.

Optionally, the concave head is a cylinder, a plurality of sand discharge grooves are evenly formed in the side wall of the cylinder, a first groove is formed in the middle of the cylinder, and second grooves are formed between the first groove and the sand discharge grooves.

Optionally, a transverse pin slot is arranged on the corner of the polygonal column.

Optionally, a structural groove is arranged at the joint of the concave head and the multi-prism; the center head further comprises a sliding groove, and the sliding groove is communicated with the concave head and the structural groove.

Optionally, the reaming sheet comprises a rotary round lug and a reaming part; a connecting part is arranged between the rotary lug and the hole expanding part; the rotary round lug is matched with the round lug groove of the limiting hole; the reaming part is of a cylindrical structure, a first inclined plane is arranged on the inner side of the reaming part, a boss is arranged on the first inclined plane, and the boss is matched with the sliding groove.

Optionally, the end face of the central head and the end face and the side face of the reaming piece are provided with alloy column teeth.

The utility model discloses for prior art gain following technological effect:

1. the invention has simple structure, convenient use and strong practicability.

2. The reaming sheet provided by the invention has the advantages that the main body is larger, the service life of the reaming sheet is long, the economic loss of replacing the reaming sheet is reduced, more alloy column teeth are embedded in the reaming sheet, the crushing efficiency is high, the drilling speed is high, and the cost is saved.

3. The design of the concave head is adopted, the self-centering effect is good, deviation is not easy to occur, a hole is formed, the follow-up resistance of the sleeve is reduced, and the sleeve and the pipe boot are prevented from being broken.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural view of a self-centering concentric casing drilling tool of the present invention;

FIG. 2 is a schematic view showing the open state of the hole-expanding sheet of the present invention;

FIG. 3 is a schematic view showing the recovery state of the hole-expanding sheet of the present invention;

FIG. 4 is a schematic view of the rod stabilizer of the present invention;

fig. 5 is a schematic view of the female head of the present invention;

FIG. 6 is a schematic view of the reamer of the present invention;

FIG. 7 is an assembly schematic view of the self-centering concentric casing drill of the present invention;

fig. 8 is an exploded schematic view of the self-centering concentric casing drilling tool of the present invention.

The labels in the figure are: 101-stabilizer, 102-stabilizer tail, 103-spline teeth, 105-positioning pin hole, 120-stabilizer end face, 108-stabilizer arc face, 107-stabilizer groove inclined face, 109-stabilizer inclined face, 112-stabilizer triangular prism hole plane, 110-stabilizer triangular prism hole, 106-stabilizer lug groove, 104-stabilizer head, 111-stabilizer sand discharge groove, 201-concave head, 211-assembly structure groove, 210-transverse pin groove, 207-vent hole, 205-triangular prism, 215-lug, 202-concave head tail, 220-concave head plane, 204-concave head first inclined face, 206-concave head second inclined face, 203-concave head, 208-slide groove, 209-concave head sand discharge groove, 301-reaming piece, 315-boss, 308-reaming sheet inclined plane, 302-rotary round lug, 304-connecting part, 310-reaming sheet plane, 306-reaming excircle, 401-split pin and 501-transverse pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides a self-centering concentric casing drill, which includes a rod stabilizer 101, a central head, and three hole enlarging sheets 301; steady pole ware 101 one end is provided with the spline, and the steady pole ware 101 other end is provided with one and holds the chamber, and the center head sets up in holding the intracavity, and three reaming piece 301 sets up in holding the intracavity and three reaming piece 301 sets up between center head and steady pole ware 101.

In this embodiment, as shown in fig. 1 to 8, the rod stabilizer 101 is a rod-shaped body, one end of which is provided with a groove stroke accommodating cavity, the accommodating cavity comprises a middle triangular prism 205 hole and a limiting hole arranged around the triangular prism 205 hole, and the limiting hole is located at the upper part of the triangular prism 205 hole; the reaming piece 301 is arranged in the limiting hole. The limiting hole comprises a first groove and round lug grooves arranged on two sides of the first groove.

The side wall of the stabilizer 101 is provided with a positioning pin hole 105, and the positioning pin hole 105 is communicated with the accommodating cavity and used for inserting a transverse pin 501 to limit the central head and prevent the central head from falling from the accommodating cavity.

The center head includes a concave head 201 and a triangular prism 205, and the triangular prism 205 is disposed at one end of the concave head 201. The concave head 201 is a cylinder, three sand discharge grooves are uniformly formed in the side wall of the cylinder, a first groove is formed in the middle of the cylinder, and a second groove is formed between the first groove and the sand discharge grooves. The corners of the triangular prism 205 are provided with a cross pin slot 210.

The triangular prism 205 may also be provided as a flat cylinder or a multi-spline shaft.

A structural groove 211 is arranged at the joint of the concave head 201 and the triangular prism 205; the center head further comprises a slide groove 208, the slide groove 208 communicating the female head 201 and the structural groove 211.

The central head is also provided with a vent hole 207, and the vent hole 207 penetrates through the concave head 201 and the triangular prism 205.

The reaming sheet 301 comprises a rotary lug 302 and a reaming part; a connecting part 304 is arranged between the rotary lug 302 and the hole expanding part; the rotary lug 302 is matched with a lug groove of the limiting hole; the reaming portion is a cylindrical structure, a first inclined surface is arranged on the inner side of the reaming portion, a boss 315 is arranged on the first inclined surface, and the boss 315 can slide along the sliding groove 208. Alloy column teeth are arranged on the end face of the central head and the end face and the side face of the hole expanding sheet 301.

The self-centering concentric pipe-following drilling tool in the embodiment has a simple structure, so that the assembly process is simple, and during assembly, the rotary round lug 302 of the hole expanding sheet 301 is only required to be arranged in the round lug groove, then the center head is inserted into the accommodating cavity, and the center head is fixed in the accommodating cavity by inserting the transverse pin 501 into the positioning pin hole 105.

When the drilling tool works, when the central head is stressed to slide towards the direction of the rod stabilizer 101, the inclined surface of the central head can simultaneously push the hole expanding sheets 301 to rotate along the axial direction of the rotary lug 302, when the plane of the central head contacts the end surface 120 of the rod stabilizer, the inclined surface of the hole expanding sheets 301 just contacts the inclined surface of the central head, and meanwhile, the plane of the hole expanding sheets 301 just contacts the plane of the rod stabilizer 101.

The boss 315 is clamped in the sliding groove 208 of the center head, the reaming sheet 301 forms a reaming circle when the drilling tool rotates, the structure can enable the reamed hole to be larger than the outer diameter of the sleeve by 15-20 mm, the friction force borne by the sleeve is reduced, and the sleeve can be easily tracked, so that the sleeve is prevented from being broken and the pipe shoe is prevented from being broken.

When the drilling tool rotates, the boss 315 of the reaming sheet 301 is clamped in the sliding groove 208 of the center head, so that the reaming sheet 301 is prevented from swinging greatly in the drilling process, the abrasion of the reaming sheet 301 is reduced, and the service life of the reaming sheet 301 is prolonged.

The rotary round lugs 302 of the three hole expanding pieces 301 are respectively assembled in the grooves of the three round lugs of the rod stabilizer 101, so that the round lugs are not easy to wear, the possibility of dropping the hole expanding pieces 301 is reduced, and the reliability of the drilling tool is improved.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A self-centering concentric pipe-following drilling tool is characterized by comprising a rod stabilizer, a center head and a plurality of hole expanding sheets; stabilizer bar one end is provided with connecting portion, the stabilizer bar other end is provided with one and holds the chamber, the center head set up in hold the intracavity, a plurality of reaming pieces set up in hold the intracavity just a plurality of reaming pieces set up in the center head with between the stabilizer bar.

2. The self-centering concentric casing drill according to claim 1, wherein the rod stabilizer is a rod-shaped body.

3. The self-centering concentric casing drill according to claim 1 or 2, wherein the connection portion is a spline; and/or the accommodating cavity comprises a polygonal hole in the middle and limiting holes arranged around the polygonal hole; the number of the sides of the polygonal hole is the same as the number of the reaming sheets; the hole expanding sheet is arranged in the limiting hole, wherein the polygonal hole is a triangular prism-shaped hole.

4. The self-centering concentric casing drill according to claim 3, wherein the limiting hole comprises a first groove and lug grooves disposed on both sides of the first groove.

5. The self-centering concentric casing drill according to claim 1, wherein the center head comprises a concave head and a polygonal column disposed at one end of the concave head.

6. The self-centering concentric casing drilling tool according to claim 5, wherein the concave head is a cylinder, a plurality of sand discharge grooves are uniformly formed in the side wall of the cylinder, a first groove is formed in the middle of the cylinder, and a second groove is formed between the first groove and the plurality of sand discharge grooves.

7. The self-centering concentric casing drill according to claim 5, wherein a cross pin slot is provided on a corner of the polygonal column.

8. The self-centering concentric casing drill according to claim 5, wherein a structural groove is provided at the junction of the female head and the multi-prism; the center head further comprises a sliding groove, and the sliding groove is communicated with the concave head and the structural groove.

9. The self-centering concentric casing drill according to claim 8, wherein the reamer pieces comprise a rotary lug and a reamer portion; a connecting part is arranged between the rotary lug and the hole expanding part; the rotary round lug is matched with the round lug groove of the limiting hole; the reaming part is of a cylindrical structure, a first inclined plane is arranged on the inner side of the reaming part, a boss is arranged on the first inclined plane, and the boss is matched with the sliding groove.

10. The self-centering concentric casing drill according to claim 1, wherein the end face of the center head and the end face and the side face of the reamer piece are provided with alloy studs.