CN216690980U - Low-abrasion-resistance special-shaped composite drill bit - Google Patents

Abstract

The utility model relates to a drill bit field especially relates to a low abrasion hinders compound drill bit of dysmorphism, and it includes the base and locates the compound piece of dysmorphism of base top surface, be equipped with the first breach that the leanin extends on the outer wall of base circumference, just first breach extends to the base bottom surface. Because set up first breach on the circumference outer wall of base, and first breach extends to the bottom surface of base, and then the intraoral base outer wall of first breach will be less than other partial outer walls of base, realize carrying out the in-process of probing at the drill bit, shaft bottom stratum structure can be kept away from to the intraoral base outer wall of first breach, the area of contact of base with shaft bottom stratum has been reduced, make the compound piece of base surplus outer wall and special-shaped tooth receive under equal brill, more easily eat the stratum, and effectively reduce and rub and hinder, the drilling efficiency of drill bit is greatly improved.

Description

Low-abrasion-resistance special-shaped composite drill bit

Technical Field

The application relates to the field of drill bits, in particular to a low-abrasion-resistance special-shaped composite drill bit.

Background

In the exploration and development of petroleum and natural gas resources in recent years, along with the continuous expansion of exploration areas, more compact strata are often encountered, such as mudstone, gypsum rock, tuff and other strata with hard plasticity characteristics, and when the stratum is encountered, a drill bit is often shown to have extremely high drilling speed of up to 100-, the bit after being taken out has very high novelty, so that when encountering the stratum with larger elasticity and plasticity, the conventional round composite sheet is pressed into the stratum under the action of bit pressure, but the stratum generates elastic deformation, the composite sheet is difficult to effectively eat into the stratum, so that the effective scraping function can not be formed, therefore, the capability of the drill bit and the composite sheet to bite into the stratum in the hard plastic stratum is improved, the method is an important idea for solving the problem of accelerating the hard plastic stratum, and the method can become an important way and method for shortening the drilling period and reducing the drilling cost.

In the related technology, the special-shaped composite sheets have strong capability of being eaten into the stratum and are more in variety. For example, roof ridge teeth and conical teeth have been subjected to certain market validation, but the special-shaped composite sheet is still not suitable for the stratum with the hard plasticity characteristic and cannot play an effective scraping role in the stratum. In addition, some special-shaped teeth which seem to have strong aggressivity, such as bowl-shaped teeth, saddle teeth and the like, have a certain speed increasing effect when the stratum with a small backward inclination angle structure is in use, but the speed increasing effect has great limitation.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a low-abrasion-resistance special-shaped composite drill bit to solve the problems that the drill bit with a special-shaped composite sheet in the related technology has poor capability of being eaten into the stratum in a hard-plastic stratum and is limited in speed increase.

The utility model provides a low abrasion hinders compound drill bit of dysmorphism, its includes the base and locates the compound piece of dysmorphism of base top surface, be equipped with the first breach that the leanin extends on the outer wall of base circumference, just first breach extends to the base bottom surface.

In some embodiments, at least one first helical tooth is arranged on the shaped composite sheet, and the first helical tooth extends from the shaped composite sheet to the top surface of the base in an inclined mode;

at least one second notch is arranged on the circumferential outer wall of the base, and the second notch is formed by extending the circumferential outer wall of the base along the intersection line of the first helical tooth and the top surface of the base.

In some embodiments, two first helical teeth are arranged on the special-shaped composite sheet, two second notches are arranged on the circumferential outer wall of the base, and the two first helical teeth and the two second notches are symmetrically arranged relative to the first notch.

In some embodiments, the first notch is spaced a distance from the second notch.

In some embodiments, the second notch comprises one or more of a flat surface and a curved surface.

In some embodiments, the first notch comprises one or more of a flat surface, a curved surface.

In some embodiments, the first notch extends in a diameter direction of the base a distance no greater than a length of the radius of the base.

In some embodiments, the first notch extends in the axial direction of the base by no more than 0.8 times the sum of the axial length of the base and the thickness of the profiled composite sheet.

In some embodiments, the first gap is provided in plurality on the outer circumferential wall of the base.

In some embodiments, the profiled composite sheet is a tip-round composite sheet, a triangular composite sheet, a ax-shaped composite sheet, or a cone-shaped composite sheet.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a low abrasion hinders special-shaped composite drill bit, because set up first breach on the circumference outer wall of base, and first breach extends to the bottom surface of base, and then the intraoral base outer wall of first breach will be less than other partial outer walls of base, the realization is carried out the in-process of probing at the drill bit, bottom of the well stratigraphic structure can be kept away from to the intraoral base outer wall of first breach, the area of contact of base with bottom of the well stratigraphic is reduced, make the compound piece of base surplus outer wall and special-shaped tooth under receiving equal brill, eat into the stratum more easily, and effectively reduce and rub and hinder, the efficiency of drill bit probing is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of a rock breaking state according to an embodiment of the present application;

FIG. 3 is a front view of an embodiment of the present application;

FIG. 4 is a side view of an embodiment of the present application;

FIG. 5 is a schematic view of a combination plane structure of a first notch according to another embodiment of the present application;

fig. 6 is a schematic view illustrating a first notch having a convex arc structure according to another embodiment of the present application.

In the figure:

1. a base; 10. a top surface; 11. a bottom surface;

2. a profiled composite sheet; 20. a first helical tooth;

3. a first notch;

4. a second notch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the related technology, the special-shaped composite sheet has strong capability of being eaten into the stratum and more varieties, for example, roof teeth and conical teeth are subjected to certain market verification, but the special-shaped composite sheet is still not suitable for the stratum with the characteristic of hard plasticity and cannot play an effective scraping role in the stratum; in addition, some tooth forms which seem to have strong aggressivity, such as bowl-shaped teeth, saddle teeth and the like, have a certain speed increasing effect but have a limited speed increasing effect when the stratum is in a small backward inclination angle structure. The reason is that the specially-shaped composite sheets are mainly cylindrical teeth, although the tooth end faces of the cylindrical teeth have strong aggressivity, tooth columns still contact a bottom hole structure under an elastic-plastic stratum, the tooth area contacting the bottom hole structure is large, so that the tooth end faces cannot be pressed into the stratum more effectively, and the specially-shaped composite sheets are limited in speed increase.

Therefore, the embodiment of the application provides a low-abrasion-resistance special-shaped composite drill bit to solve the problems.

The utility model provides a compound drill bit of low abrasion resistance dysmorphism, its includes base 1 and locates the compound piece 2 of dysmorphism of 1 top surface 10 of base, 1 circumference of base is equipped with the first breach 3 that the leanin extends on the outer wall, just first breach 3 extends to 1 bottom surface 11 of base.

The special-shaped composite sheet 2 is connected to the top surface 10 of the base 1, and the bottom surface 11 of the base 1 is the surface of the base 1 connected to the special-shaped composite sheet 2.

Set up like this, because set up first breach 3 on the circumference outer wall of base 1, and first breach 3 extends to base 1's bottom surface 11, and then 1 outer wall of base in the first breach 3 will be less than 1 other part outer walls of base, realize carrying out the in-process of probing at the drill bit, shaft bottom stratum structure can be kept away from to 1 outer wall of base in the first breach 3, and reduce the area of contact of 1 circumference outer wall of base and shaft bottom stratum, make 1 surplus outer wall of base and the compound piece of special-shaped tooth under receiving equal brill and pressing, eat into the stratum more easily, and effectively reduce and rub and hinder, the efficiency of drill bit probing is greatly improved.

Optionally, at least one first helical tooth 20 is arranged on the profiled composite sheet 2, and the first helical tooth 20 extends from the profiled composite sheet 2 to the top surface 10 of the base 1 in an inclined manner;

at least one second gap 4 is arranged on the circumferential outer wall of the base 1, and the second gap 4 is formed by extending the circumferential outer wall of the base 1 from the intersection line of the first helical tooth 20 and the top surface 10 of the base 1.

Set up like this, because the first skewed tooth 20 that has on the compound piece of dysmorphism 2 is along when being connected to 1 top surface 10 of base, should end along can't carrying out the coincidence in the week edge of 1 top surface 10 of base, but connect inside the top surface 10 of base 1, make there is the vacant region between the week edge of compound piece of dysmorphism 2 and 1 top surface 10 of base, second breach 4 then uses this part vacant region, make under not influencing compound piece 2 of dysmorphism and connecting, further reduce the area of contact between 1 circumference outer wall of base and the bottom of the well stratum, in order to further improve the soil layer effect of eating of whole drill bit and speed-up effect.

Optionally, be equipped with two first skewed teeth 20 on the compound piece of dysmorphism 2, be equipped with two second breach 4 on the circumference outer wall of base 1, and two first skewed tooth 20 and two second breach 4 homogeneous phase is relative first breach 3 symmetry sets up.

Set up like this, when realizing further reducing contact surface area between 1 circumference outer wall of base and the shaft bottom stratum, make base 1 self structure more stable, make it have longer life-span when using.

Optionally, the first notch 3 is spaced apart from the second notch 4.

Wherein, first breach 3 and second breach 4 have certain angle interval in base 1's circumference to there is partial base 1 circumference outer wall between first breach 3 of guarantee and the second breach 4, so that base 1 whole process is comparatively stable when rotating, has higher stability in use.

Optionally, the second notch 4 includes one or more of a plane surface and a curved surface.

Optionally, the first notch 3 includes one or more of a plane surface and a curved surface.

The curved surfaces that can be disposed on the first notch 3 and the second notch 4 can be specifically selected from curved surfaces formed by a concave arc surface, a convex arc surface, a wavy surface or a combination of multiple surfaces in different embodiments. In this embodiment, the structural surfaces of the first notch 3 and the second notch 4 on the base 1 are planar structures.

In some embodiments, the structural surface of the first notch 3 on the base 1 is a curved surface formed by a plane and a concave arc surface.

In some embodiments, the structural surface of the first notch 3 on the base 1 is a curved surface formed by a convex arc surface.

Optionally, the extending distance of the first notch 3 in the diameter direction of the base 1 is not more than the length of the radius of the base 1.

The extending distance D of the first notch 3 in the diameter direction of the base 1 is specifically half of the radius of the base 1.

Set up like this, when realizing forming first breach 3 on base 1, effectively ensure that base 1 still has better structural strength, and then control whole drill bit and have better life.

Optionally, the extension length of the first notch 3 in the axial direction of the base 1 is not more than 0.8 times of the sum of the axial length of the base 1 and the thickness of the special-shaped composite sheet 2.

The extending length H of the first notch 3 in the axial direction of the base 1 is specifically 0.5 time of the sum L of the axial length of the base 1 and the thickness of the special-shaped composite sheet 2.

Set up like this, realize whole drill bit at the probing in-process, first breach 3 can effectively reduce the area of contact of base 1 and shaft bottom stratum under the tilt state, makes base 1 overall structure intensity obtain the guarantee simultaneously, makes the drill bit that forms can carry out the practicality smoothly.

Optionally, the first gap 3 is provided in plurality on the circumferential outer wall of the base 1.

In some embodiments, two or more first notches 3 may be provided to achieve a greater ability to penetrate into the formation during use of the integral drill bit.

Optionally, the specially-shaped composite sheet 2 is a tip-circle composite sheet, a triangular composite sheet, an axe-shaped composite sheet or a conical composite sheet.

Set up like this, make the compound piece 2 of dysmorphism have stronger destructive power and the ability of eating into the stratum, and then make whole drill bit have higher efficiency when using.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a low abrasion hinders compound drill bit of dysmorphism, its includes base (1) and locates compound piece (2) of dysmorphism of base (1) top surface (10), its characterized in that: the base (1) circumference outer wall is equipped with first breach (3) that the inside slope extends, just first breach (3) extend to base (1) bottom surface (11).

2. The low wear resistance profiled composite drill bit according to claim 1,

the special-shaped composite sheet (2) is provided with at least one first helical tooth (20), and the first helical tooth (20) extends from the special-shaped composite sheet (2) to the top surface (10) of the base (1) in an inclined manner;

the circumference outer wall of base (1) is equipped with at least one second breach (4), just second breach (4) by first skewed tooth (20) with the intersection line of base (1) top surface (10) is to the circumference outer wall of base (1) extends and forms.

3. The special-shaped composite drill bit with low abrasion resistance according to claim 2, characterized in that two first helical teeth (20) are arranged on the special-shaped composite sheet (2), two second notches (4) are arranged on the circumferential outer wall of the base (1), and the two first helical teeth (20) and the two second notches (4) are symmetrically arranged relative to the first notch (3).

4. The profiled composite drill bit with low wear resistance according to claim 2 or 3, characterized in that the first notch (3) is spaced apart from the second notch (4).

5. The low wear resistance contoured composite drill bit according to claim 2, characterized in that the second notch (4) comprises one or more of a flat surface, a curved surface.

6. The low wear resistance contoured composite drill bit according to claim 1, characterized in that the first indentation (3) comprises one or more of a flat surface, a curved surface.

7. The profiled composite drill bit with low wear resistance according to claim 1, characterized in that the first notch (3) extends over a distance in the diameter direction of the base (1) which is not greater than the length of the radius of the base (1).

8. The low wear resistance profiled composite drill bit according to claim 1, characterized in that the extension of the first notch (3) in the axial direction of the base (1) is not more than 0.8 times the sum of the axial length of the base (1) and the thickness of the profiled composite sheet (2).

9. The profiled composite drill bit with low wear resistance according to claim 1, characterized in that the first notch (3) is provided in plurality on the circumferential outer wall of the base (1).

10. The low wear resistance profiled composite drill bit according to claim 1, characterized in that the profiled composite sheet (2) is a tip round composite sheet, a triangular composite sheet, a hatchet composite sheet or a cone composite sheet.

Images