SU1548399A1 - Apparatus for drilling wells - Google Patents

Abstract

The invention relates to the mining industry and allows increasing the drilling rate by improving the conditions for the passage of particles of broken rock from the rock-breaking elements of the bit to the auger rod of the rod. The device for drilling wells includes a rod 1 with a splined helix 2 and a chisel, including a housing (K) 3 and blades (L) 5 with rock-breaking elements 6, mounted on K 3 with the formation of a core cavity 7. On the lateral surface K 3, longitudinal inclined grooves are made grooves (P) 8. The number P 8 is equal to the number L 5. Each P 8 is adjacent to the front face of the corresponding L 5 and has a smooth fit with it. Closest to the device axis, point 10 of the intersection line P 8 with stop end K 3 is from this axis at a distance equal to the radius of the bar 1. During the drilling process, the rock moves from the bottom to the bar along L 5. Due to the presence of K 3 P 8 well cross-section at the site of intensive movement of destruction products, which reduces their resistance to movement from rock-breaking elements 6 to the auger coil 2. 3 Il.

Description

31548399

The tom K 3 is from this axis at a distance equal to the radius of the rod 1. During the drilling process, the fractured rock moves from the bottom to the rod along the L 5. Due to the presence on the K 3 P 8, the borehole section in the place of intensive movement of the fracture products increases, which reduces resistance to their movement from the rock-destructive elements 6 to the screw helix 2. 3 Il.

The invention relates to the mining industry, in particular, to devices for drilling wells. The purpose of the invention is to increase the drilling rate by improving the conditions for the passage of particles of broken rock from the rock-breaking elements of the bit to the auger spiral of the rod.

Figure 1 shows a device for drilling wells, a general view; figure 2 is the same, the view from the working end of the bit; .a fig.Z - section aa in figure 1.

The device contains a rod 1 with a screw-like spiral 2 and a chisel including a body 3 with a shank 4 for connecting to the rod 1 and sliding 5 with rock-tearing elements 6. The latter form a core cavity 7 of radius g in the central part of the working bit end. 3 bits are made according to the number of blades of longitudinal inclined grooved grooves 8, the depth of which decreases in the direction of the working end of the bit to the shank 4. Each groove 8 directly adjoins the front face 9 of the corresponding blade 5 and It has a floating yoy mate. At the same time, the point 10 of the intersection of the groove 8 with the stop end 11 of the housing 3 at the base of the shank 4 is closest to the axis of the device and is located at a distance equal to the radius R of the rod, and the angle of inclination of the groove to the axis of the device is determined from the ratio

. R - g

ot arctg.) L

where L is the height of the bit body to

shank

The device works as follows.

In the process of drilling under the action of transmitted to the bit through the screw

0

five

0

0

five

five

0

five

A new rod 1 of axial load and torque is the rock-breaking elements of 6 blades 5 embedded in the rock and destroying it. The core thus formed enters the core cavity 7 of the bit and is destroyed by the transverse vibrations of the tool. Destroyed rock and core fragments due to the back-up of the newly formed products of destruction are gradually moving from the bottom to the pin helix of the rod. In this case, the bulk of the destroyed rock moves along the front edges of the bit blades. The presence on the body of longitudinal oblique iron-like grooves, coupled with the front edges of the blades, increases the borehole cross section at the site of intensive movement of degradation products. This implies resistance to the movement of the destroyed rock, especially its large pieces, from the rock-breaking elements of the bit to the auger spiral of the rod. As a result, the speed of drilling increases.

Claims (1)

Invention Formula A device for drilling wells containing a screw rod spi. railing and chisel, including a body with a shank for connecting to the rod, blades with rock-breaking elements, mounted on the body with the formation of a core cavity in the central part of the working end of the bit, and a longitudinal inclined groove-like groove on the lateral surface of the body, the depth of which decreases in the direction from the working end of the bit to the shank, characterized in that, in order to increase the drilling speed by improving the conditions for the passage of particles of the destroyed rock from rock-breaking elements awn bits to auger spiral rods, the number of pro