RU97432U1 - SCREW VALVE CHISEL WITH LAMINED ELEMENT OF VANE OF AUGER VALVE BIT - Google Patents

Abstract

The set of useful models related by one creative concept relates to the mining industry, in particular to drill blade bits and can be used to create auger blade bits for continuous drilling of hydrogeological, geological exploration, drainage, boreinjection and other technical wells, as well as when creating auger drills. A screw blade chisel containing a housing with a multi-faceted shank, bearing a screw pipe with a flange and blades, in which the blades consist of separate replaceable plate elements with replaceable rock cutting tools, the angle of elevation of the spiral line formed by the peripheral ends of the replaceable plate elements of the blade along which rock cutting the cutters of the blade bit is equal to the angle of elevation of the spiral of the flange of the screw, and the angular displacement of each subsequent interchangeable plate element of the blade relative but the first in the radial plane has the form of a series of consecutive numbers α, 2α ... nα and is directed towards the rotation of the bit, the angle α is determined from the expression α = 180 / n, where n is the number of replaceable plate elements that make up the blade. The claimed utility model provides an increase in drilling productivity by 10-12% compared with well-known analogues. The replaceable blade element of the blade of the screw blade bit is made in the form of a complex shape with a central hole of a polyhedral shape (preferably hexagonal), the mounting axis of which in each subsequent replaceable plate element in the radial plane is offset by an angle α relative to the located replaceable plate element, while interchangeable plate element consists of two equal shoulders - the right and left relative to the center of the bit with grooves on the peripheral parts in which are mounted These incisors, the back surfaces of the grooves lie in planes at an angle γ = 15-30 ° to the bottom face of the well and are directed towards the rotation of the bit, and the front shoulder faces are made with a positive slope with respect to the bottom face of the well, the angle of which is equal to the angle of elevation of the flange spiral screw, R∂ is the height of the interchangeable plate element h and their number n constituting the blade are determined by the analytical expressions h = S / 2n and n = R∂ / where S is the spiral pitch of the screw flanges, R∂ is the radius of the screw bit, - the width of the cutter on the plate element. The placement of the cutters on each interchangeable blade element of the blade at equal distances from the center of the bit contributes to an even distribution of forces from the torque, increasing their service life in comparison with the known analogues. In addition, depending on the number of interchangeable plate elements in the bit, you can get bits of different diameters with the corresponding diameters of the screws. 2 n.p. f-ly, 2 z.p. crystals, 1 tab., 3 ill.

Description

The utility model relates to the mining industry, in particular to drilling paddle bits and can be used to create auger blade bits for continuous drilling of hydrogeological, exploration, drainage, injection and other wells for technical purposes, as well as when creating auger drills.

From the prior art it is known a drill blade, containing a housing with a lock and stepped blades, the front faces of which are reinforced with rock cutting elements located at an angle to the axis of the bit / 1 /.

The disadvantage of the analogue is the lack of radial displacement of the rock-cutting elements of the blade, which creates additional resistance to the movement of the destroyed rock on its surface.

The closest in technical essence and the achieved result is a drilling tool for rotary drilling of wells, comprising a body with two-way spiral blades and fixed to the blades along radial lines stepwise with the possibility of overlapping each other at different angles to the vertical plane with cutters / 2 /. This technical solution was made as a prototype.

The disadvantage of the prototype is a convex-concave shape of the bottom of the well, formed by the cutters of the blade, in which one of the cutters works completely in a clamped environment, which is the worst of all known conditions for the destruction of the rock, and insignificant angles of displacement of the cutters in the radial plane relative to each other in the direction of rotation of the bit, creating additional resistance to the movement of the destroyed rock along the surface of the blade.

The problem solved by the utility model in terms of a screw blade is to provide lightweight conditions for the destruction of the rock without additional resistance to its movement along the surface of the blade.

The technical result consists in increasing drilling productivity by 10-12% and the possibility of using a bit for drilling wells of various diameters.

The achievement of the technical result in the part of the screw blade bit is facilitated by the fact that the screw blade bit containing a housing with a multi-faceted shank, the supporting screw pipe with a flange and blades, in which the blades consist of separate replaceable plate elements with replaceable rock cutting tools, with the spiral angle the line formed by the peripheral ends of the interchangeable blade elements of the blade along which the rock-cutting incisors of the blade bit are mounted is equal to the angle of elevation of the spiral helix auger screw, and the angular displacement of each subsequent blade element of the blade relative to the first in the radial plane has the form of a series of consecutive numbers α, 2α ... nα and is directed towards the rotation of the bit, the angle α is determined from the expression α = 180 / n, where n is the number of plate elements constituting the blade.

The prior art bit for rotary drilling, comprising a housing with a fixed screw flanges and cutters on the ends of the flanges / 3 /.

The disadvantage of the analogue is the impossibility of using a bit with screws of various diameters and the inconsistency of the angle of installation of the cutters to the angle of elevation of the spirals of the screw flanges, which creates additional resistance to the movement of the destroyed rock on the screw flanges.

The closest in technical essence and the achieved result is a blade bit containing a housing and blades, consisting of plate elements in the form of cantilever beams pinched from one end on the bit body, on the peripheral parts of which replaceable cutters are mounted, while the plate elements have an angular displacement in the radial plane relative to each other / 4 /. This technical solution was made as a prototype.

The disadvantages of the prototype are: the unreliability of the plate elements made in the form of pinched beams with a cantilever installation of the working bodies of the bit, as a result of which the reaction of the borehole bottom resulting from torque is perceived only by the cantilever ends of the plate elements, and the height and angular displacement of the plate elements of the blade are not connected with one of the parameters of the bit.

The problem solved by the utility model in terms of a replaceable blade element of a blade of a screw blade bit is to increase the reliability of replaceable plate elements, as well as providing an angular displacement of one blade element of the blade relative to another by an angle α.

The technical result consists in increasing the working life of interchangeable plate elements of a screw blade bits and the possibility of using one bit with screws of different diameters.

The specified technical result is achieved by the fact that the replaceable plate element of the blade of the screw blade bit (hereinafter referred to as the replaceable plate element) is made in the form of a complex shape with a central hole of a polyhedral shape (preferably hexagonal), the mounting axis of which in each subsequent replaceable plate element in the radial plane offset by an angle α relative to the located interchangeable plate element, while the interchangeable plate element consists of two equal shoulders - the right and left centered on the center of the bit with grooves on the peripheral parts, the rear surfaces of which lie in planes at an angle γ = 15-30 ° to the bottom face of the well and are directed towards the rotation of the bit, and the front shoulder faces are made with a positive slope relative to the bottom face of the well, whose angle is equal to the angle of elevation of the screw flange of the screw β, the height of the removable plate element h and their number n constituting the blade are determined by the analytical expressions h = S / 2n and n = R∂ / where S is the spiral pitch of the screw flanges, R∂ is the radius of the screw bit, - the width of the cutter on a removable plate element.

The utility model is illustrated by drawings. Figure 1 presents a General view of a screw blade bits; figure 2 section along aa in figure 1; figure 3 "a" the first interchangeable plate element; figure 3 "b" the second interchangeable plate element; figure 3 "in" the third interchangeable plate element.

The list of positions:

1. The housing of the screw blade bits.

2. The hole in the body of the bit, coaxial with the hole in the bearing pipe of the screw.

3. The supporting pipe of the screw.

4. Auger ribs.

5. Shank of the screw.

6. Replaceable plate element:

h is the height of the plate element;

n is the number of plate elements;

S is the spiral pitch of the auger flanges;

R∂ is the radius of the screw bit;

- the width of the working body (cutter) of the blade;

α is the angular displacement of each subsequent interchangeable plate element relative to the previous in the radial plane;

β is the angle of elevation of the spiral of the flange of the screw;

γ is the angle of the back surface of the groove of the interchangeable plate element to the plane of the bottom hole;

0 - the center of the bit.

7. Rock cutting tools.

8. The multifaceted hole in the interchangeable plate element.

9. The right shoulder of the interchangeable plate element

10. The left shoulder of the interchangeable plate element.

11. The rear surface of the groove on the peripheral part of the interchangeable plate element.

12. The front face of the right and left shoulders of the interchangeable plate element.

The screw blade chisel (hereinafter referred to as the chisel) is shown in FIG. 1. The bit consists of a housing 1 (Fig. 2) with an opening 2 (Fig. 1) for fastening the bearing pipe of the screw 3 (Fig. 1) with a shank of the housing 1 (not shown in Fig. 1 and Fig. 2), the supporting pipe of the screw 3 (Fig. 1) with a flange 4 (Fig. 1) and a shank 5 (Fig. 1), lamellar elements 6 (Fig. 1) with replaceable rock cutting tools 7 (hereinafter referred to as cutters) (Fig. 1). The angle of elevation of the spiral line formed by the peripheral ends of the interchangeable plate elements 6 (Fig. 1), along which the cutters of the bit are mounted, is equal to the angle of elevation of the spiral flanges of the screw β (Figure 1, Fig. 3 "a", 3 "b" and 3 " c), and the angular displacement of each subsequent interchangeable blade element of the blade α (Fig.3 "b") relative to the first (Fig.3 "a") in the radial plane has the form of a series of consecutive numbers α, 2α ... nα and is directed in the direction of rotation bit, and the angle α is determined from the expression α = 180 / n, where n is the number of removable plate elements that make up blade.

Replaceable plate element of the blade of the auger blade bit 6 is presented in (Figure 3). The plate element has a central hole of a polyhedral shape 8 (Figure 3) (preferably hexagonal), the axis of which in each subsequent after the first (Figure 3 "a") replaceable plate element 6 is offset relative to the mounting axis of the blade (Figure 3) α (Figure 3 "b"), right 9 (Figure 3) and left 10 (Figure 3) shoulders from the center of the bit O, at the ends of which grooves 13 (Figure 3) are made with the rear surfaces 11 (Figure 3 ), which lie in planes at an angle γ = 15-30 ° (Fig. 3 "a", 3 "b" and 3 "c") to the bottom face of the well and are directed in the direction of rotation of the bit, and the front edges of the shoulders Execute with a positive slope in relation to the borehole bottom plane, which angle equals the angle of ascent β of the screw spiral flanges. The height of the interchangeable plate element h (Fig. 3 "a", 3 "b" and 3 "c") and the number n of interchangeable plate elements 6 constituting the blade are determined by the analytical expressions h = S / 2n and n = R∂ / where S is the spiral pitch of the auger flanges (Figure 1), R∂ is the radius of the screw bit (Figure 2), - the width of the cutter on a removable plate element (Figure 1).

Example 1

Let us calculate the angular displacement of a separate interchangeable blade element of the blade in the radial plane α for a screw bit, for example, with a diameter of 430 mm. A bit with a diameter of 430 mm has a screw flange diameter of 420 mm (standard diameter). The pitch of the spiral flanges can be from 280 to 500 mm. We will calculate the angle α for the pitch of the flange spiral equal to 400 mm. Cutter width on interchangeable plate element (e.g. T-25 carbide plate) is 25 mm. Then the number of interchangeable plate elements on the blade n = R∂ / equal to 8, the height of the interchangeable plate element h = S / 2n is 400/16 = 25 mm, and the angle α is 180 ° / 8 = 22.5 °. All these parameters are interconnected when constructing a spiral line along which chisel cutters are mounted.

With the obtained parameters n, h and α, the angle of elevation of the spiral line formed by the peripheral ends of the interchangeable plate elements of the bit with a diameter of 430 mm along which the replaceable chisels of the bit are mounted is practically equal to the angle of elevation of the spiral of the flange of the screw, which does not create additional efforts to move the destroyed rock over the surface bit blades, and the height of the replaceable blade element of the blade equal to 25 mm ensures the operation of all cutters in semi-blocked, i.e. lightweight conditions, and increases drilling productivity by 10-12%. For comparison, we present the results of drilling with 430 mm blades in drill rocks of category V-VI for drillability with the same parameters of the drilling mode.

Table 1 No. p / p Matching Objects Drilling performance, m / h one. Prototype device 5.2 2. Claimed device 5.75

As follows from table No. 1, the drilling performance of the claimed device is 10.5% higher than the productivity of the prototype device, which gives reason to approve the achievement of the claimed technical result.

Screw blade chisel works as follows. At the wellhead, to the liner (not shown in Fig. 1) of the bit body 1 (Fig. 2), the supporting pipe of the screw 3 (Fig. 1) is connected, aligning the holes 2 (Fig. 1) in the liner of the bit body 1 (Fig. 2) and the bearing tube of the screw 5 (Fig. 1), and is fixed with a locking finger (not shown in Fig. 1). Then the assembled bit is connected to the rotator of the drilling rig and, applying axial force to the bit, they begin to lower the bit with rotation to the surface of the rock. After drilling the bit over its entire length, the drill is extended by the next section of the screw and the drilling of the well continues. Consistently increasing the sections of the screws pass the well to the design depth.

Example 2

Replaceable plate element of the blade of the auger blade bit 6 is presented in (Figure 3). The replaceable plate element has a central opening of a polyhedral shape 8 (Fig. 3) (preferably hexagonal), the axis of which in each subsequent after the first (Fig. 3 "a") replaceable plate element 6 is offset relative to the mounting axis of the blade (Fig. 3) by angle α (FIG. 3 “b”), right 9 (FIG. 3) and left 10 (FIG. 3) shoulders from the center of the bit O, at the ends of which grooves 13 (FIG. 3) with rear surfaces 11 (FIG. 3), which lie in planes at an angle γ = -15-30 ° (Fig. 3 "a", 3 "b" and 3 "c") to the bottom face of the well and are directed towards the rotation of the bit. According to theoretical studies in the field of rock destruction, the rake angle of incisors of γ incisors for bits intended for drilling category IV rocks by drillability is 25-30 °, for drilling rocks of category V 20-25 ° and for drilling rocks of category VI 15-20 ° .

We define the parameters n, h and α for a bit, for example, with a diameter of 470 mm with a screw flange with a diameter of 450 mm (standard diameter) and a spiral pitch of the flange of 500 mm. The blade blades are reinforced with cutters of the T-25 shape with a width of 25 mm. Based on these data, the number of interchangeable plate elements on each blade will be equal to 235/25 = 9 (n = R∂ / ), the remaining unaffected space at the bottom of the well equal to 10 mm determines the parameters of the cut, the rock of which will be chipped off due to the radial runout of the bit during drilling. The height of the interchangeable plate elements on each blade will be 500/18 = 27.8 mm (h = S / 2n). The angle of radial displacement of an individual interchangeable blade element of the blade in the radial plane α will be 180 ° / 9 = 20 °.

With the obtained parameters n, h, and α, the elevation angle of the spiral line formed by the peripheral ends of the interchangeable plate elements of the bit with a diameter of 470 mm along which the interchangeable bit cutters are mounted is almost equal to the angle of elevation of the screw flange spiral, which does not create additional efforts to move the destroyed rock over the surface chisel blades. The placement of the cutters on each interchangeable blade element of the blade at equal radii symmetrically with respect to each other contributes to an even distribution of forces from the torque, increasing their service life. In addition, depending on the number of interchangeable plate elements in the bit, you can get bits of different diameters with the corresponding diameters of the screws. The foregoing provides a basis for approval of the achievement of the claimed technical result.

Information sources.

1. A.S. USSR No. 1366627, Cl. ЕВВ 10/42. Publ. 01/15/1988. Bull. Number 2

2. RF patent No. 2004761. Cl. ЕВВ 10/42. Publ. 12/15/1993. Bull. No. 45-46 (prototype).

3. A.S. USSR No. 1765347. Cl. ЕВВ 10/04. Publ. 09/30/1992. Bull. Number 36.

4. The catalog of the company LLC Tetracon "Conical drills" (prototype).

Claims (4)

1. A screw blade chisel containing a multi-faceted body with a shank, carrying a screw pipe with a flange and blades, characterized in that the blades consist of separate replaceable plate elements with replaceable rock cutting tools, while the angle of elevation of the spiral line formed by the peripheral ends of the replaceable plate elements the blades along which the rock-cutting incisors of the blade bit are mounted is equal to the angle of the helix flange of the auger flange, and the angular displacement of each subsequent interchangeable blade element that the first blade relative to a radial plane has the form of a series of consecutive numbers α, 2α, ..., nα. and directed in the direction of rotation of the bit, while the angle α is determined from the expression α = 180 / n, where n is the number of removable plate elements that make up the blade. 2. The screw blade chisel according to claim 1, characterized in that the replaceable blade element of the blade of the screw blade chisel is made in the form of a complex shape with a central hole of a polyhedral shape (preferably hexagonal), the mounting axis of which in each subsequent replaceable plate element in the radial plane offset by an angle α relative to the upstream interchangeable plate element, while the interchangeable plate element consists of two equal shoulders - the right and left relative to the center of the bit, and in the height h and their number n constituting the blade are determined by the analytical expressions h = S / 2n and n = R∂ /

where S is the spiral pitch of the screw flange, R∂ is the radius of the screw bit,

- the width of the rock cutting tool on a removable plate element. 3. The screw blade chisel according to claim 2, characterized in that the replaceable plate element on the peripheral parts has grooves whose rear surfaces lie in planes at an angle γ = 15-30 ° to the bottom face of the well and are directed in the direction of rotation of the bit. 4. The screw blade chisel according to claim 2, characterized in that the front faces of the shoulders of the interchangeable plate elements are made with a positive inclination with respect to the bottom face of the well, the angle of which is equal to the angle of elevation of the helical flange of the screw β.