CN216788302U - Conical composite sheet and drill bit - Google Patents

Abstract

The application relates to a conical composite sheet and a drill bit, which comprise a base and conical teeth arranged on the top surface of the base, wherein the bottom ends of the conical teeth are connected with the top surface of the base, and the top ends of the conical teeth are provided with impact surfaces used for contacting with an external environment; the tapered tooth circumference outer wall is provided with a first sunken surface and a second sunken surface at intervals along the circumference, and the first sunken surface and the second sunken surface are close to each other and extend along the generatrix direction of the tapered tooth, and a raised ridge is formed between the first sunken surface and the second sunken surface. The convex ridge can effectively scrape the stratum structure in the rotation process, the aggressiveness and the ability of being eaten into the stratum are improved, the efficiency of the conical composite sheet in the well drilling process is finally improved, meanwhile, the impact surface arranged at the top end of the conical composite sheet enables the conical composite sheet to have strong impact resistance when contacting the stratum, and finally, the drill bit has strong scraping effect while having strong impact resistance.

Description

Conical composite sheet and drill bit

Technical Field

The application relates to the field of drilling equipment, in particular to a conical composite sheet and a drill bit.

Background

In the exploration and development of petroleum and natural gas resources in recent years, along with the continuous expansion of exploration blocks, soft and hard staggered strata frequently appear, and the exploration blocks can also encounter a gravel layer and a hard interlayer, and when the exploration blocks encounter the strata, the drill bit often has insufficient shock resistance, the main reason is that the conventional circular composite sheet is easy to break teeth when entering the hard strata from the soft strata, so that the mechanical drilling speed and the footage capability of the drill bit are reduced, and the drilling cycle is influenced. The problem that the overall performance of the drill bit is generally improved by continuously improving the impact resistance of the composite sheet in the stratum is solved, but the improvement difficulty of the impact resistance of the circular composite sheet is high, and along with the optimization of the composite sheet for many years, the existing circular composite sheet enters the bottleneck period of improving the impact resistance, so that the impact resistance and the aggressivity of the drill bit can be improved only through the optimization of the tooth shape of the composite sheet, and the purpose of shortening the drilling cycle is achieved.

In the correlation technique, often adopt the compound piece of toper to replace the circular compound piece, the toper tooth has the circular arc top, installs two rows of positions at the drill bit through specific angle, has certain supplementary shock resistance, but the toper tooth impact effect is strong the while has also restricted its degree of depth of eating into the stratum structure, can't play effective scraping effect, therefore the drill bit often shows the cloth tooth density height, and the drilling speed is slow, consequently, remains to be further improved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a conical composite sheet and a drill bit, and aims to solve the problem that the scraping effect of the conical composite sheet in the related art is poor.

In a first aspect, a conical composite sheet is provided, which adopts the following scheme:

a conical composite sheet comprises a base and conical teeth arranged on the top surface of the base, wherein the bottom ends of the conical teeth are connected with the top surface of the base, and the top ends of the conical teeth are provided with impact surfaces used for contacting with the external environment;

the tapered tooth circumference outer wall is gone up along circumference interval and is equipped with first depressed face and second depressed face, just first depressed face with one side border that the second depressed face is close to each other all follows the generating line direction of tapered tooth extends, and first depressed face with form the convex ridge between the second depressed face.

In some embodiments, a side edge of the first concave surface and a side edge of the second concave surface, which are away from each other, both extend along a generatrix direction of the conical tooth, and both side edges of the first concave surface and the second concave surface are connected outside the impact surface.

In some embodiments, two side edges of the first concave surface and the second concave surface extend to the bottom peripheral edge of the conical tooth.

In some embodiments, the axial direction of the conical tooth is eccentrically arranged parallel to and spaced from the axial direction of the base, and the peripheral edge of the bottom end of the conical tooth is coincidently butted with the peripheral edge of the top surface of the base.

In some embodiments, the raised ridge is located on a side of the tapered teeth axially away from the base.

In some embodiments, the first recessed surface and the second recessed surface are symmetrically disposed on two sides of the ridge.

In some embodiments, the top surface of the base is a convex arc surface, and the end surface of the bottom end of the conical tooth is a concave arc surface corresponding to the top surface of the base.

In a second aspect, the present application provides a drill bit, which adopts the following scheme:

a drill bit, comprising:

a drill bit body;

and the multiple rows of tooth groups are connected with the drill bit body, and each row of tooth group comprises multiple conical composite sheets.

In some embodiments, the ridge of each of the conical compacts is oriented in a feed direction of the bit body.

In some embodiments, the set of teeth further includes second compacts coupled to the bit body, the conical compacts being arranged in an alternating arrangement with the second compacts on the bit body,

it is same have the difference in height between the compound piece of toper in the tooth group and the second compound piece, in two adjacent rows of tooth groups the compound piece of toper has the difference in height between the tooth group.

The technical scheme who provides this application brings beneficial effect includes:

the embodiment of the application provides a compound piece of toper and drill bit, owing to be used for having set up first sunk surface and second sunk surface on the toper tooth that creeps into, make the convex ridge that extends along toper tooth generating line direction between the two, and then the toper tooth is when creeping into, the convex ridge can effectively scrape the stratigraphic structure in rotatory process, improve its aggressivity and the ability of eating into the stratum, and then finally realize improving the efficiency of compound piece of toper when the well drilling, and simultaneously, because the strike face that the compound piece top set up of toper, make it have stronger shock resistance when contacting the stratum, finally realize that the drill bit has stronger scraping effect when having stronger shock resistance.

Drawings

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

FIG. 1 is a schematic view of the overall construction of a conical composite sheet;

FIG. 2 is a top view of a tapered composite sheet;

FIG. 3 is a schematic view of another embodiment of a conical composite sheet construction;

FIG. 4 is a schematic view of the overall structure of the drill bit;

fig. 5 is a schematic view of a tapered compact drilling situation.

In the figure:

1. a base; 10. a top surface;

2. a tapered tooth; 20. an impact surface; 21. a first concave surface; 22. a second concave surface; 23. a raised ridge;

3. a drill bit body; 30. a set of teeth; 300. a conical compact; 301. a second composite sheet.

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.

The embodiment of the application provides a conical composite sheet and a drill bit, and the problem that the scraping effect of the conical composite sheet is poor in the related art can be solved.

Referring to fig. 1-2, a conical composite sheet includes a base 1 and conical teeth 2 disposed on a top surface 10 of the base 1, wherein bottom ends of the conical teeth 2 are connected to the top surface 10 of the base 1, and top ends of the conical teeth 2 are provided with impact surfaces 20 for contacting with an external environment;

the peripheral outer wall of the conical tooth 2 is provided with a first concave surface 21 and a second concave surface 22 at intervals along the peripheral direction, one side edge of the first concave surface 21 close to the second concave surface 22 extends along the generatrix direction of the conical tooth 2, and a convex ridge 23 is formed between the first concave surface 21 and the second concave surface 22.

The first concave surface 21 and the second concave surface 22 are formed by cutting off a part of the conical tooth 2 from the corresponding cutting surface, and the surface formed on the conical tooth 2 is lower than the concave area of the circumferential outer wall of the conical tooth 2, and the surface formed by cutting off the part of the conical tooth 2 and forming the first concave surface 21 and the second concave surface 22 can be a plane, a curved surface or a combination surface of the two, wherein the curved surface can specifically select one or more of a concave arc surface, a convex arc surface and a wavy surface.

In the present embodiment, the cutting tapered teeth 2 form a surface body selection plane of the first concave surface 21 and the second concave surface 22, that is, the inner surfaces of the first concave surface 21 and the second concave surface 22 are in a planar structure, and an included angle formed between the inner surfaces of the first concave surface 21 and the second concave surface 22 is 110 degrees, and a ridge 23 is formed therebetween.

Specifically, the height of the conical tooth 2 is 8-25mm in different embodiments, the diameter of the conical tooth is 8-20mm, the included angle of the formed conical shape is 30-130 degrees, and the distance between the axial direction of the conical tooth 2 and the axial direction of the base 1 is 0-6 mm. In the embodiment, the height of the conical tooth 2 is 15mm, the diameter is 14mm, and the axial direction of the conical tooth 2 and the axial direction of the base 1 are coaxially arranged.

Set up like this, owing to set up first depressed surface 21 and second depressed surface 22 on the toper tooth 2 for creep into, make the convex ridge 23 that has formed the extension along 2 generating line directions of toper tooth between the two, and then toper tooth 2 is when creeping into, convex ridge 23 can carry out effective scraping to the stratum structure at rotatory in-process, improve its aggressivity and the ability of eating into the stratum, and then finally realize improving the efficiency of toper composite sheet 300 when the well drilling, and simultaneously, because the impact surface 20 that the toper composite sheet 300 top set up, make it have stronger shock resistance when contacting the stratum, finally realize that the drill bit has stronger scraping effect when having stronger shock resistance.

Optionally, one side edge of the first concave surface 21 and one side edge of the second concave surface 22, which are away from each other, both extend along a generatrix direction of the conical tooth 2, and both side edges of the first concave surface 21 and the second concave surface 22 are connected outside the impact surface 20.

With this arrangement, when the conical tooth 2 rotates to one side, at least one of the two edges of the first concave surface 21 and the second concave surface 22 away from each other has a function of scraping the formation structure in accordance with the convex ridge 23, so as to further improve the scraping effect of the conical composite sheet 300 provided by the embodiment of the present application. In addition, because the both sides border of first depressed surface 21 and second depressed surface 22 is in the handing-over outside strikeing the face 20, will avoid first depressed surface 21 and second depressed surface 22 and strike face 20 handing-over, can ensure the integrality of strikeing face 20, and then ensure the shock resistance of toper tooth 2.

Optionally, both side edges of the first concave surface 21 and the second concave surface 22 extend to the bottom peripheral edge of the conical tooth 2.

By means of the arrangement, the length of the convex ridge 23 formed by the first concave surface 21 and the second concave surface 22 is effectively guaranteed, and accordingly the scraping effect of the convex ridge 23 is maximized.

Referring to fig. 3, optionally, the axial direction of the conical tooth 2 is eccentrically arranged parallel to and spaced from the axial direction of the base 1, and the bottom circumferential edge of the conical tooth 2 is coincidently butted with the top surface 10 circumferential edge of the base 1.

In the embodiment, the spacing distance L1 between the conical tooth 2 and the axial direction of the base 1 is 1.5 mm.

Set up like this, realize increasing the effect scope of the top of toper tooth 2 when rotating, and then improve the aggressive of whole toper composite sheet 300, realize can improving drilling efficiency when using this toper composite sheet 300.

Referring to fig. 3, the ridge 23 is optionally located on a side of the conical tooth 2 axially away from the base 1.

Wherein, because conical tooth 2 is eccentric settings at 1 top surface 10 of base, and 2 bottom week edges of conical tooth are along the butt joint with the week of base 1, the impact surface 20 that makes the relative top in bottom surface of conical tooth 2 is the inclined plane setting, at this moment, the convex ridge 23 is located conical tooth 2 axial when keeping away from 1 axial one side of base, be located conical tooth 2 one side that is closer to 1 week edge of base for convex ridge 23 promptly, and in this embodiment, convex ridge 23 is in the middle part of 2 circumference outer walls of this part conical tooth, make convex ridge 23 and 1 week of base along the distance between the minimum, its length is in the shortest state simultaneously. Furthermore, the ridges 23 on the conical tooth 2 will scrape the formation more effectively when it is rotated.

Meanwhile, because the other side slope surface of the conical tooth 2 far away from the convex ridge 23 is longer, the contact area of the conical tooth 2 when the conical tooth 2 rotates to the side slope surface to be contacted with the stratum structure is increased, the stress state of the conical tooth 2 when contacting the stratum can be well relieved, and the stability of the conical tooth 2 during drilling is improved.

Specifically, in this embodiment, the radius R of the impact surface 20 is 0.5mm, the height H1 of the raised ridge 23 is 5mm, the vertex angle a of the cone-shaped tooth 2 is 90 degrees, the diameter D of the composite piece is 13.5mm, and the height H is 20 mm.

Furthermore, in other embodiments, the ridge 23 may be located on the other axial side of the conical tooth 2, i.e. the ridge may be located on the longer sloping side of the conical tooth 2.

Optionally, the first recessed surface 21 and the second recessed surface 22 are symmetrically disposed on two sides of the ridge 23.

Set up like this for first sunk surface 21 is unanimous with the size of second sunk surface 22, and then makes the 23 both sides borders of convex ridge that form all can carry out effective scraping, realizes when the compound piece 300 of toper is rotatory to equidirectional, all can have stronger scraping effect to the stratum structure.

In addition, the first recessed surface 21 and the second recessed surface 22 may be disposed asymmetrically on both sides of the ridge 23 in other embodiments.

Optionally, the top surface 10 of the base 1 is a convex arc surface, and the bottom end surface of the conical tooth 2 is a concave arc surface corresponding to the top surface 10 of the base 1.

Set up like this, base 1 is connected through the relative plane of convex cambered surface with toper tooth 2 and can has stronger connection stability, and then ensures the life and the stability in use of the compound piece 300 of toper.

In addition, in different embodiments, the connection surface between the base 1 and the conical tooth 2 may be a plane surface, a conical surface, a spherical surface, a wavy surface, a grooved surface or a combination of surfaces.

Referring to FIG. 4, in another aspect, the present application provides a drill bit.

A drill bit, comprising:

a bit body 3;

a plurality of rows of sets of teeth 30 connected to the bit body 3, each row of sets of teeth 30 comprising a plurality of conical compacts 300 as described above.

By the arrangement, the drill bit can have a strong impact resistance effect and a scraping effect when the conical composite sheet 300 is used, so that the drilling efficiency can be effectively improved during drilling construction, and the drilling period is shortened.

Referring to fig. 5, optionally, the ridge 23 of each of the tapered compacts 300 is oriented in the feed direction X of the bit body 3.

By the arrangement, the two side edges of the convex ridge 23 can be perpendicular to the rotating direction of the drill bit body 3, and further, when the drill bit is in rotary construction, the conical composite sheet 300 on the drill bit can effectively scrape the stratum structure.

In addition, the conical composite sheet 300 is arranged in a forward inclining manner when being installed on the drill bit body 3, so that a certain included angle can be formed between the conical composite sheet and a stratum structure, and the convex ridge 23 on the conical composite sheet 300 plays roles of stamping and plowing when contacting the stratum. Specifically, the forward rake angle at which the conical composite sheet 300 is mounted on the bit body 3 may be set to 0 to 50 degrees as needed.

Referring to fig. 4, optionally, a second composite sheet 301 connected to the bit body 3 is further included in the set of teeth 30, the conical composite sheets 300 and the second composite sheets 301 are alternately arranged on the bit body 3, and,

the conical composite sheet 300 and the second composite sheet 301 in the tooth group 30 have a height difference, and the conical composite sheets 300 in the two adjacent rows of tooth groups 30 have a height difference.

In this embodiment, the second composite sheet 301 has pointed teeth, and may have round teeth or triangular teeth in different embodiments.

In addition, in different embodiments, the height difference between the conical composite sheet 300 and the second composite sheet 301 in the same tooth group 30 can be controlled to be-3 to 3 mm; the height difference between the conical composite sheets 300 in the two adjacent sets of teeth 30 can be controlled to be-3 to 3 mm.

Alternatively, the base 1 and the conical tooth 2 may be made of cemented carbide, diamond, cubic boron carbide, or any combination of any number of the materials described.

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 the case may be.

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 previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement 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 conical composite sheet comprises a base (1) and conical teeth (2) arranged on the top surface (10) of the base (1), and is characterized in that the bottom ends of the conical teeth (2) are connected with the top surface (10) of the base (1), and the top ends of the conical teeth (2) are provided with impact surfaces (20) used for contacting with the external environment;

the taper tooth (2) is provided with a first concave surface (21) and a second concave surface (22) along the circumferential direction at intervals on the circumferential outer wall, one side edge of the first concave surface (21) close to the second concave surface (22) extends along the generatrix direction of the taper tooth (2), and a convex ridge (23) is formed between the first concave surface (21) and the second concave surface (22).

2. The tapered composite sheet according to claim 1, wherein one side edges of the first concave surface (21) and the second concave surface (22) which are away from each other extend along a generatrix direction of the tapered tooth (2), and both side edges of the first concave surface (21) and the second concave surface (22) meet outside the impact surface (20).

3. The conical composite sheet according to claim 2, wherein both side edges of the first concave surface (21) and the second concave surface (22) extend to the bottom peripheral edge of the conical tooth (2).

4. The conical composite sheet according to claim 1, wherein the axial direction of the conical tooth (2) is eccentrically arranged parallel to and spaced from the axial direction of the base (1), and the bottom circumferential edge of the conical tooth (2) is coincidently butted with the top circumferential edge (10) of the base (1).

5. The conical compact of claim 4, characterized in that the ridge (23) is located on the side of the conical tooth (2) axially remote from the base (1).

6. The tapered composite sheet according to claim 5, wherein the first recessed surface (21) and the second recessed surface (22) are symmetrically disposed on both sides of the ridge (23).

7. The conical composite sheet according to claim 1, wherein the top surface (10) of the base (1) is provided with a convex arc surface, and the end surface of the bottom end of the conical tooth (2) is provided with a concave arc surface corresponding to the top surface (10) of the base (1).

8. A drill bit, characterized in that it comprises:

a drill body (3);

a plurality of rows of sets of teeth (30) attached to the bit body (3), each row of sets of teeth (30) comprising a plurality of conical compacts (300) according to any one of claims 1 to 7.

9. The drill bit of claim 8, wherein the ridge (23) of each of the conical compacts (300) is oriented in a feed direction of the bit body (3).

10. The drill bit of claim 8, further comprising a second composite sheet (301) connected to the bit body (3) within the set of teeth (30), the conical composite sheets (300) alternating with the second composite sheets (301) on the bit body (3),

the conical composite sheet (300) and the second composite sheet (301) in the tooth group (30) have a height difference, and the conical composite sheets (300) in the two adjacent tooth groups (30) have a height difference.

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