CN210118098U - Novel tooth-shaped structure of arc-parabola-arc - Google Patents

Abstract

The utility model relates to a novel arc-parabola-arc tooth structure, which is mainly composed of a tooth column, a tooth top, a second circular arc surface, a paraboloid and a first circular arc surface; The trajectory is mainly composed of arc 1, parabola, arc 2 and arc 3. Arc 1 is tangent to parabola, parabola and arc 2 are tangent, and arc 2 is tangent to arc 3; When the drill bit is used, it has both the impact action in the vertical direction and the scraping action in the circumferential direction; the top of the alloy tooth adopts a spherical tooth structure, and the spherical tooth part of the alloy tooth is impacted by the impact of the drill bit. At the same time, the first arc surface, the second arc surface and the paraboloid scrape the rock under the action of rotation. The utility model can improve the low rock breaking efficiency of the drill bit in the soft and hard staggered stratum, and reduce the damage of the drill bit.

Description

A new type of tooth structure of arc-parabola-arc

technical field

The utility model relates to a novel arc-parabola-arc tooth structure, which belongs to the field of oil and gas drilling and exploration.

Background technique

With the deepening of the exploration and development of petroleum resources, the drilling environment for geological exploration in my country is getting worse, the difficulty of drilling is increasing, and the requirements for drilling tools are also increasing. At present, the teeth of geophysical drill bits used in domestic drilling and exploration are mainly spherical teeth or conical teeth. The teeth are easy to penetrate into the rock formation and break the rock during the drilling process, but the conical teeth are easy to break, and are mainly suitable for soft formations.

However, for the stratum where the soft and hard are interlaced, the teeth of the geophysical drill bit are required to have good scraping ability and certain impact resistance. It is difficult for the current spherical teeth and conical teeth to meet the above conditions at the same time, resulting in slow drilling speed and low drilling efficiency of the drill bit when drilling into soft and hard strata. In order to solve the current problem, a novel arc-parabola-arc tooth structure is proposed, which improves the drilling efficiency of the geophysical drill bit in soft and hard staggered formations.

SUMMARY OF THE INVENTION

The purpose of the utility model is to solve the problems of low rock breaking efficiency and serious damage of the drill bit in soft and hard staggered strata, and proposes a novel arc-parabola-arc tooth structure.

The technical scheme adopted by the utility model to realize its purpose is:

A new type of tooth structure of arc-parabola-arc is mainly composed of tooth column, tooth top, second circular arc surface, parabolic surface and first circular arc surface; It consists of arc 1, parabola, arc 2 and arc 3, arc 1 is tangent to parabola, parabola is tangent to arc 2, and arc 2 is tangent to arc 3; the first arc surface is composed of The first circular arc is formed by rotating along the circumferential direction; the paraboloid is formed by cutting the tooth crest along the direction perpendicular to the cross section; the second circular arc surface is formed by rotating the second circular arc along the parabola at the cutting edge of the tooth crest.

The left end of the first circular arc is tangent to the surface of the tooth column, and the upper end is tangent to the parabola, and the relational expression is X ² +(Y+R ₂ ) ² =R ₂ ² ; the upper end of the parabola is tangent to the second arc , the relational expression is A ² Y-BX ² =0; the second right end of the circular arc is tangent to the three circular arcs, and the relational expression is (XAR ₁ ) ² +(YB) ² =R ₁ ² ; the circle Arc 3 is a circular arc formed by the cross section of the spherical tip, and its relational expression is (XR ₃ +R ₂ ) ² +Y ² =R ₃ ² .

In the sectional view of the arc-parabola-arc tooth structure in the coordinate system, the R ₁ is the radius of the arc 2; the R ₂ is the radius of the arc 1; the R ₃ is the arc The radius of 3; the A is the length of the intersection of the parabola and the arc 2 along the X direction; the B is the length of the intersection of the parabola and the arc 2 along the Y direction.

Compared with the prior art, the invention has the following advantages: 1. The arc-parabola-arc segment scrapes and breaks rocks, and can be used for soft formations such as sandstone and medium-soft formations; 3. The new tooth structure combining arc-parabola-arc and spherical cap improves the drilling efficiency of geophysical drill bits in soft and hard staggered formations.

Description of drawings

Fig. 1 is the front view of the novel tooth structure of a kind of arc-parabola-arc of the present utility model;

2 is a side view of a novel tooth structure of a circular arc-parabola-circular arc of the present invention;

Fig. 3 is Fig. 2 (M-M) sectional view;

4 is a sectional view of a novel tooth structure of a circular arc-parabola-circular arc of the present invention;

Fig. 5 is the partial enlarged view of the utility model arc-parabola-arc;

Fig. 6 is a coordinate diagram of arc-parabola-arc according to the present invention.

In the figure: 1. tooth column; 2. tooth top; 3. arc one; 4. parabola; 5. arc two; 6. arc three; 7. second arc surface; 8. paraboloid; 9. first an arc surface.

Detailed ways

Below in conjunction with accompanying drawing and example, the utility model is further described:

As shown in Figure 1, Figure 2, Figure 3, Figure 4, a new type of tooth structure of arc-parabola-arc is mainly composed of tooth column 1, tooth top 2, second arc surface 7, paraboloid 8, The first arc surface 9 is composed of; the trajectories of the tooth structure profile at the tooth tip 2 are mainly composed of arc one 3, parabola 4, arc two 5, and arc three 6, and arc one 3 is tangent to parabola 4 , the parabola 4 is tangent to the arc two 5, and the arc two 5 is tangent to the arc three 6; the first arc surface 9 is formed by the rotation of the arc one 3 along the circumferential direction; the parabola 8 is formed by the parabola 4 The tooth top 2 is cut along the direction perpendicular to the cross section to form; the second circular arc surface 7 is formed by rotating the circular arc two 5 along the parabola 4 at the cutting edge of the tooth top.

As shown in Fig. 5 and Fig. 6 , the left end of the arc-3 is tangent to the surface of the tooth column 1, and the upper end is tangent to the parabola 4, and the relational expression is X ² +(Y+R ₂ ) ² =R ₂ ² ; The upper end of the parabola 4 is tangent to the arc two 5, and its relational expression is A ² Y-BX ² =0; The right end of the arc two 5 is tangent to the arc three 6, and its relational expression is (XAR ₁ ) ² +(YB) ² =R ₁ ² ; the arc 3 6 is an arc formed by the cross section of the spherical addendum 2 , and its relational expression is (XR ₃ +R ₂ ) ² +Y ² =R ₃ ² .

As shown in Figure 6, in the sectional view of the arc-parabola-arc tooth structure in the coordinate system, the R ₁ is the radius of the arc two 5; the R ₂ is the radius of the arc one 3; Described R ₃ is the radius of arc three 6; Described A is the length of the intersection of parabola 4 and arc two 5 along the X direction; Described B is the intersection of parabola 4 and arc two 5 along the Y direction length.

Its working principle is:

When the alloy teeth work on the geophysical drill bit, they have both the impact effect in the vertical direction and the scraping effect in the circumferential direction. Impact rock breaking; at the same time of impact, the first arc surface 9, the second arc surface 7 and the paraboloid 8 scrape the rock under the rotation of the drill bit; At this time, the arc-parabola-arc part is mainly used to scrape the rock; when drilling into a harder stratum, the spherical crown is mainly used to impact and break the rock.

Claims (2)

1. The utility model provides a novel profile of tooth structure of circular arc-parabola-circular arc, mainly comprises tooth post (1), addendum (2), second arc surface (7), paraboloid (8), first arc surface (9), its characterized in that: the trajectory of a profile diagram of the tooth-shaped structure at the tooth crest (2) mainly comprises a first arc (3), a parabola (4), a second arc (5) and a third arc (6), wherein the first arc (3) is tangent to the parabola (4), the parabola (4) is tangent to the second arc (5), and the second arc (5) is tangent to the third arc (6); the first arc surface (9) is formed by rotating the first arc (3) along the circumferential direction; the paraboloid (8) is formed by cutting the tooth top (2) along the direction vertical to the section plane by a parabola (4); the second arc surface (7) is formed by rotating an edge of the second arc (5) cut at the tooth top along the parabola (4).

2. The novel tooth-shaped structure of the arc-parabola-arc as claimed in claim 1, wherein: the left end of the arc I (3) is tangent to the surface of the tooth column (1), the upper end of the arc I is tangent to the parabola (4), and the relational expression is X²+(Y+R₂)²＝R₂ ²(ii) a The upper end of the parabola (4) is tangent to the second arc (5), and the relational expression is A²Y-BX²0; the right end of the second arc (5) is tangent to the third arc (6), and the relational expression is (X-A-R)₁)²+(Y-B)²＝R₁ ²(ii) a The third arc (6) is an arc formed by the section of the spherical tooth top (2), and the relational expression is (X-R)₃+R₂)²+Y²＝R₃ ²。

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