CN219081498U

CN219081498U - Three-blade PDC drill bit with special-shaped teeth for small well holes

Info

Publication number: CN219081498U
Application number: CN202220825217.6U
Authority: CN
Inventors: 张剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2023-05-26
Anticipated expiration: 2032-04-11

Abstract

The utility model relates to the technical field of petroleum equipment, in particular to a three-blade PDC drill bit with special-shaped teeth in a slim hole, which comprises a drill bit body, wherein one end of the drill bit body is connected with a connecting end part, one end of the connecting end part, which is far away from the drill bit body, is provided with a screw thread through turning threads, the connecting end part is connected with a drill rod through the screw thread, the other end of the drill bit body is provided with three blades, the three blades comprise a long blade and two short blades, the long blade penetrates through a bus of the crown part of the drill bit body, and the two short blades are arranged on two sides of the long blade.

Description

Three-blade PDC drill bit with special-shaped teeth for small well holes

Technical Field

The utility model relates to the technical field of petroleum equipment, in particular to a PDC drill bit with special-shaped teeth and three blades in a slim hole.

Background

The petroleum is called as industrial blood and black gold, the national development and energy safety are concerned, china is currently being inspired into the sixth global oil and gas production country, however, the external dependence of oil and gas resources is increased to 72%, the continuous increase of domestic oil and gas exploration force and breadth makes drilling to develop to deep and unconventional oil and gas reservoirs, the stratum has the characteristics of poor drillability, strong abrasive property and non-uniformity in the drilling process, and the drill bit is used as a tool for opening the stratum and the ground channel, and the quality and the matching property with lithology and other drilling tools directly influence the drilling efficiency, quality and cost.

At present, a conventional PDC drill bit or a roller cone drill bit is generally used for drilling more complex stratum, the conventional PDC drill bit is large in diameter, more rock needs to be broken in the drilling process, the problems of poor aggressiveness and poor guidance quality exist in cutting teeth of the conventional PDC drill bit, and the problem that a sealing system and a roller cone fail easily occur due to the high temperature effect in a deep well of the roller cone drill bit.

There is therefore a need for a slim hole, shaped tooth, three-bladed PDC bit that ameliorates the above-described problems.

Disclosure of Invention

The utility model aims to provide a three-blade PDC drill bit with special-shaped teeth for a slim hole, which aims to solve the problems of poor aggressibility, poor guidance quality and low mechanical drilling rate of the conventional PDC drill bit and roller bit in the slim hole of a deep well.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a three wings PDC drill bits of slim hole dysmorphism tooth, includes the bit body, the one end of bit body is connected with connecting end, connecting end is kept away from the one end of bit body and is formed with the screw thread through turning screw thread, connecting end is connected with the drilling rod through the screw thread, the other end of bit body is provided with the wing, the wing is provided with three altogether, including a long wing and two short wings, long wing passes the generating line of bit body crown, two short wings set up in long wing both sides, and contained angle between the adjacent wing is 120, is provided with a plurality of honeycomb groove on long wing and the short wing of every respectively, every the inside of honeycomb groove all is provided with dysmorphism PDC cutting tooth, every be provided with alloy strip on the wing, and every alloy strip weld respectively in the recess of every wing.

As a preferable scheme of the utility model, the cutting surfaces of the blades are arc-straight line-parabolic, and the centers of the three blades form an inner conical surface.

As a preferable scheme of the utility model, the honeycomb grooves on the long blades are provided with five honeycomb grooves, and the honeycomb grooves on each short blade are provided with four honeycomb grooves.

As a preferable scheme of the utility model, the back inclination angle of the two special-shaped PDC cutters on each blade near the center of the crown of the bit body is 25 degrees, the side inclination angle of the two special-shaped PDC cutters on each blade near the outer side of the crown of the bit body is 5 degrees, and the back inclination angle of the two special-shaped PDC cutters on each blade near the outer side of the crown of the bit body is 20 degrees, and the side inclination angle of the two special-shaped PDC cutters is 8 degrees.

As a preferable scheme of the utility model, each special-shaped PDC cutting tooth consists of a tungsten carbide alloy matrix and a polycrystalline diamond layer.

As a preferable scheme of the utility model, the drill bit body and the middle part of the connecting end part are provided with an inner cavity, the crown part of the drill bit body is provided with a plurality of water holes, and each water hole is communicated with the inner cavity.

As the preferable scheme of the utility model, the number of the water holes is four, the periphery of the crown part of the drill bit body is provided with three water holes with the diameter of 8mm, the included angle between the water holes and the central line of the drill bit body is 25 degrees, and the central position of the crown part of the drill bit body is provided with one water hole with the diameter of 10mm which is collinear with the central line of the drill bit body.

As a preferable scheme of the utility model, the two sides of the middle part of the drill bit body are provided with shackle grooves for installing and dismantling the drill bit, and the shackle grooves on the two sides are symmetrically arranged on the left side and the right side.

Compared with the prior art, the utility model has the beneficial effects that:

1. the crown blade structure of the drill bit body is optimized, the inner conical surface formed by the three blades has better guidance and higher high-definition in the drilling process, and meanwhile, the structure has higher mechanical drilling speed in a slim hole, and different back inclination angles and side inclination angles are set for PDC cutting teeth at different positions, so that the drill bit has better aggressiveness and longer service life;

2. the utility model can carry out water outlet at high temperature through the built-in inner cavity and the water holes distributed at the crown part of the bit body, thereby avoiding the problem of failure of a sealing system and the roller bit caused by high temperature.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

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

FIG. 3 is a top view of the present utility model;

fig. 4 is a front view of the present utility model.

In the figure: bit body 1, blade 2, connecting end 3, shackle groove 4, dysmorphism PDC cutting tooth 5, water eye 6, alloy strip 7, inner chamber 8, honeycomb groove 9.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Several embodiments of the utility model are presented. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, the present utility model provides a technical solution:

referring to fig. 1, 2 and 3, an embodiment 1 is disclosed, please refer to a three-blade PDC drill bit with special-shaped teeth for a slim hole, which comprises a drill bit body 1, one end of the drill bit body 1 is connected with a connecting end 3, one end of the connecting end 3, which is far away from the drill bit body 1, is formed with threads through turning threads, the connecting end 3 is connected with a drill rod through threads, the diameter of the drill bit body is 130mm, the other end of the drill bit body 1 is provided with blades 2, three blades 2 are provided, each blade 2 comprises one long blade and two short blades, the long blade penetrates through a bus at the crown of the drill bit body 1, the two short blades are arranged on two sides of the long blade, an included angle between the adjacent blades is 120 °, a plurality of honeycomb grooves 9 are respectively arranged on the long blade and each short blade, each PDC cutting tooth 5 is composed of a tungsten carbide alloy matrix and a polycrystalline diamond layer, the diamond layer is used for cutting, the tungsten carbide alloy matrix plays a role in supporting the polycrystalline diamond layer, each blade 2 is provided with an alloy strip 7, and each blade 7 is welded in each groove 2.

In example 2, referring to fig. 1, 2 and 3, the cutting surfaces of the blades are arc-straight-parabolic, and the centers of the three blades form an inner conical surface, which mainly plays a role in guiding and improving stability.

In embodiment 3, referring to fig. 1, 2 and 3, five honeycomb grooves 9 are formed on the long blade, and four honeycomb grooves 9 are formed on each short blade.

The back inclination angle of the two special-shaped PDC cutting teeth 5 on each blade 2, which are close to the center of the crown of the bit body 1, is 25 degrees, the side inclination angle of the two special-shaped PDC cutting teeth 5 on each blade 2, which are close to the outer side of the crown of the bit body 1, is 20 degrees, the side inclination angle of the two special-shaped PDC cutting teeth 5 is 8 degrees, and different back inclination angles and side inclination angles are set for the PDC cutting teeth at different positions, so that the bit has better aggressiveness and longer service life.

The middle part of bit body 1 and connecting tip 3 has seted up inner chamber 8, a plurality of water eye 6 has been seted up to the crown of bit body 1, every water eye 6 all with the intercommunication of inner chamber 8, water eye 6 is provided with four altogether, bit body 1's crown periphery is provided with three water eye 6, the diameter is 8mm, be 25 with bit body 1's central line contained angle, bit body 1's crown central point puts and is provided with a water eye 6, the diameter is 10mm, with bit body 1's central line collineation, water eye 6 and inner chamber 8's intercommunication, external coolant liquid cools off bit body 1 when the probing, avoid sealing system and the problem that roller bit became invalid that the high temperature led to.

The shackle grooves 4 for installing and dismantling the drill bit are formed in two sides of the middle of the drill bit body 1, the shackle grooves 4 are symmetrically formed in the left side and the right side, and the shackle grooves 4 are used for installing and dismantling the drill bit conveniently.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a three wing PDC drill bits of slim hole dysmorphism tooth, includes bit body (1), the one end of bit body (1) is connected with connecting end (3), the one end that bit body (1) was kept away from to connecting end (3) is formed with the screw thread through turning screw thread, connecting end (3) are connected with the drilling rod through the screw thread, the other end of bit body (1) is provided with wing (2), its characterized in that: the utility model provides a cutter blade, including long wing and two short wings, long wing passes the generating line of drill bit body (1) crown, and two short wings set up in long wing both sides, and the contained angle between the adjacent wing is 120, is provided with a plurality of honeycomb groove (9) on long wing and the every short wing respectively, every the inside of honeycomb groove (9) all is provided with dysmorphism PDC cutting tooth (5), every be provided with alloy strip (7) on wing (2), and every alloy strip (7) weld respectively in every in the recess of wing (2).

2. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: the cutting surfaces of the blades are arc-straight line-parabolic, and the centers of the three blades form an inner conical surface.

3. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: five honeycomb grooves (9) on the long blades are formed, and four honeycomb grooves (9) on each short blade are formed.

4. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: the back inclination angle of the two special-shaped PDC cutting teeth (5) on each blade (2) close to the center of the crown of the drill bit body (1) is 25 degrees, the side inclination angle is 5 degrees, the back inclination angle of the two special-shaped PDC cutting teeth (5) on each blade (2) close to the outer side of the crown of the drill bit body (1) is 20 degrees, and the side inclination angle is 8 degrees.

5. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: each special-shaped PDC cutting tooth (5) consists of a tungsten carbide alloy matrix and a polycrystalline diamond layer.

6. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: the drill bit comprises a drill bit body (1) and a connecting end part (3), wherein an inner cavity (8) is formed in the middle of the drill bit body, a plurality of water holes (6) are formed in the crown of the drill bit body (1), and each water hole (6) is communicated with the inner cavity (8).

7. The slim hole, special-shaped tooth, three-bladed PDC drill of claim 6, wherein: the drill bit comprises a drill bit body (1), and is characterized in that four water holes (6) are formed in the periphery of the crown of the drill bit body (1), three water holes (6) are formed in the periphery of the crown of the drill bit body (1), the diameter of each water hole is 8mm, an included angle between each water hole and the central line of the drill bit body (1) is 25 degrees, one water hole (6) is formed in the central position of the crown of the drill bit body (1), the diameter of each water hole is 10mm, and the water holes and the central line of the drill bit body (1) are collinear.

8. A slim hole, special-shaped tooth, three-bladed PDC drill bit of claim 1, wherein: the drill bit comprises a drill bit body (1), wherein the two sides of the middle of the drill bit body (1) are provided with shackle grooves (4) for installing and dismantling a drill bit, and the shackle grooves (4) on the two sides are symmetrically arranged on the left side and the right side.