CN214944013U

CN214944013U - Cemented carbide tooth with quadrangular pyramid structure

Info

Publication number: CN214944013U
Application number: CN202120760791.3U
Authority: CN
Inventors: 李琴; 雷雨薇; 翟预立; 张文琳; 陈科; 梁耀文; 唐克好; 周操
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-30
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a cemented carbide tooth of quadrangular pyramid structure, which mainly comprises a tooth post, a scraping side surface and an outer convex curved tooth crest, wherein the scraping side surface comprises a scraping edge, an upper chamfer arc and a lower chamfer arc, and the scraping edge is chamfered; the upper chamfer arc is tangent to the tooth top of the convex curved surface, and the relational expression is Y ═ BX²+ H; the lower chamfer arc is tangent to the tooth column, and the relational expression is Y ═ AX²(ii) a The vertex angle of the cone is alpha, and the alpha ranges from 50 degrees to 60 degrees; the cone angle is beta, and the range of the beta is 100 degrees to 110 degrees; as the tooth begins to move with the drill bit, the tooth has both a tendency to move forward and rotate relative to the rock. In the stratum with staggered hardness, the drill bit mainly passes through the stratum when drilling into the harder stratumImpacting and crushing rock by using the cone spherical tooth convex curved surface tooth crest; when the drill bit drills into a softer stratum, the rock is mainly scraped through scraping edges; the utility model discloses can increase the broken volume of rock when the well drilling, improve the drilling efficiency of drill bit in the crisscross stratum of hardness.

Description

Cemented carbide tooth with quadrangular pyramid structure

Technical Field

The utility model relates to a carbide tooth of four pyramid structures belongs to oil gas drilling exploration field.

Background

Along with the development of petroleum resource exploration, complex strata such as soft and hard staggered formations are frequently encountered, and the drilling difficulty is continuously increased, so that a geophysical prospecting drill bit capable of efficiently breaking rocks is urgently needed. Wherein, the tooth on the drill bit is the direct participant of broken rock in-process, consequently, the broken rock efficiency of drill bit is directly influenced to the tooth profile of drill bit, and then has influenced oil gas exploration development progress and cost. At present, the conventional geophysical prospecting drill bit is mainly composed of spherical teeth and conical teeth. In a softer stratum, the scraping area of the spherical teeth is small, the rock breaking efficiency is low, and in a harder stratum, the conical teeth are easy to bite into the stratum but are abraded greatly. The utility model discloses to above problem, provided a carbide tooth of four pyramid structures, overcome the easy wearing and tearing problem of little and the toper tooth of spherical tooth scraping area, improved the drilling efficiency of geophysical prospecting drill bit in the crisscross stratum of soft or hard greatly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the efficiency of the drill bit broken rock is improved, the tooth side direction scrapes the side rock in a similar milling mode, and a larger side scraping area is kept, so that the problems that the drill bit in a soft and hard staggered stratum is low in rock breaking efficiency, the drill bit is seriously damaged and the like are solved.

The utility model discloses realize that its purpose realizes through following technical scheme:

the hard alloy tooth with quadrangular pyramid structure is mainly formed from tooth column and scraping cutterThe scraping and cutting side surface consists of a scraping and cutting edge, an upper chamfer angle circular arc and a lower chamfer angle circular arc, and the scraping and cutting edge is subjected to chamfering treatment; the upper chamfer arc is tangent to the tooth top of the convex curved surface, and the relational expression is Y ═ BX²+ H; the lower chamfer arc is tangent to the tooth column, and the relational expression is Y ═ AX²(ii) a The vertex angle of the cone is alpha, and the alpha ranges from 50 degrees to 60 degrees; the cone angle is beta, and the range of the beta is 100 degrees to 110 degrees; as the tooth begins to move with the drill bit, the tooth has both a tendency to move forward and rotate relative to the rock.

Compared with the prior art, the utility model, have following advantage: 1. the tooth top part of the convex curved surface is in a shape with a high middle part and low two sides, when the tooth top part acts with the stratum, the pressure on the unit area of the tooth top part is large, the tooth top part is easy to cut into the stratum, the rock breaking capacity can be further enhanced, and the tooth top part is suitable for harder strata; 2. the tooth is scraping crowded in-process to the rock, owing to increased four and scraped the side of cutting and scrape the arris, has improved the scraping ability of tooth side direction, has increased the scraping volume of tooth to the rock when scraping broken rock, is applicable to softer stratum, can accelerate drilling efficiency.

Drawings

Fig. 1 is a schematic view of a cemented carbide tooth with a quadrangular pyramid structure according to the present invention;

FIG. 2 is a side view of a square pyramid-shaped hard alloy tooth of the present invention;

fig. 3 is a tooth coordinate diagram of the cemented carbide with a quadrangular pyramid structure according to the present invention;

fig. 4 is a top view of a cemented carbide tooth with a quadrangular pyramid structure according to the present invention;

in the figure: 1. a tooth post; 2. scraping and cutting the side surface; 3. convex curved tooth crest; 4. scraping and cutting edges; 5. chamfering an arc; 6. a lower chamfer arc;

Detailed Description

The invention will be further described with reference to the following figures and examples:

as shown in figures 1, 2, 3 and 4, the cemented carbide tooth with the quadrangular pyramid structure mainly comprises a tooth column 1, a scraping side surface 2 and a convex curved tooth top 3, wherein the tooth column is provided with a concave surface, and the concave surface is provided with a concave surfaceThe scraping and cutting side face 2 consists of a scraping and cutting edge 4, an upper chamfer angle circular arc 5 and a lower chamfer angle circular arc 6, and the scraping and cutting edge 4 is chamfered; the upper chamfer arc 5 is tangent to the convex curved surface tooth crest 3, and the relational expression is Y ═ BX²+ H; the lower chamfer arc 6 is tangent to the tooth column 1, and the relational expression is Y ═ AX²(ii) a The vertex angle of the cone is alpha, and the alpha ranges from 50 degrees to 60 degrees; the cone angle is beta, and the range of the beta is 100 degrees to 110 degrees; as the tooth begins to move with the drill bit, the tooth has both a tendency to move forward and rotate relative to the rock.

The working principle is as follows:

when the geophysical prospecting drill bit works, the hard alloy teeth have impact action in the vertical direction and scraping action in the circumferential direction, the top ends of the hard alloy teeth adopt a cone-sphere tooth structure, and the outer convex curved tooth tops 3 are impacted to break rocks under the impact action of the drill bit; when the impact action is carried out, the scraping and cutting edges 4 scrape the rock under the rotation of the drill bit, so that the rock breaking area is favorably expanded; in the stratum with staggered hardness, when a drill bit drills into a hard stratum, the drill bit mainly impacts and crushes rocks through a cone spherical tooth convex curved surface tooth top 3; when the drill bit drills into a softer stratum, the scraping edges 4 are mainly used for scraping rocks, so that the high-efficiency drilling efficiency is achieved.

Claims

1. The utility model relates to a cemented carbide tooth of quadrangular pyramid structure, which mainly comprises a tooth post (1), a scraping side surface (2) and an outer convex curved tooth crest (3), wherein the scraping side surface (2) comprises a scraping edge (4), an upper chamfer arc (5) and a lower chamfer arc (6), and the scraping edge (4) is chamfered; the vertex angle of the cone is alpha, and the alpha ranges from 50 degrees to 60 degrees; the cone angle is beta, and the range of the beta is 100-110 degrees.

2. A tooth of cemented carbide of quadrangular-pyramidal structure according to claim 1, wherein: the upper chamfer arc (5) is tangent to the convex curved tooth crest (3), and the relational expression is Y-BX²+ H; the lower chamfer arc (6) is tangent to the tooth column (1), and the relational expression is Y-AX²(ii) a When the teeth start to move with the drill bit, the teeth have both forward and rotational movement relative to the rockAnd (5) dynamic trend.