SU1675540A1 - Single-cone drill bit - Google Patents

Abstract

The invention relates to a rock-destroying tool and could be used in drilling wells. The goal is to increase the durability of the bit by reducing bearing wear. The chisel includes a housing 1 with an inclined lower end 2 and a central flushing channel 3. A trunnion 4 is attached to the end 2. A roller 5 with through longitudinal channels 8 and an inclined upper end facing the end 2 is mounted by means of bearings 6. with the central flushing channel and channels of a sharoshka. The chamber 9 is made in the form of a segment located at the end 2. The channels 8 are made in communication with the end 2 and with different pitch. As a result of periodically combining the camera 9 and the channels 9, reinforced high-speed jets are formed. Increased impact on jet power contributes to the effective removal of drill cuttings. 1 з п ф-лы, 1 ил

Description

The invention relates to a rock cutting tool and may find application in well drilling.

The purpose of the invention is to increase the durability of the bit by reducing wear

BEARINGS.

The drawing shows a single-bit chisel.

A single-cone bit consists of a korg 1 with an inclined lower end 2 and a central flushing channel 3, integral with a spigot 4, and a roller cutter 5 mounted on the axle 4 using bearings 6. The roller cutter 5 is made with an inclined upper end 7 facing the lower end 2 cases 1. In the body of sharosh 5, through longitudinal channels 8 are made, placed with different pitch. In the lower highlander 2 of the housing 1, a camera 9 is made in the form of a segment with a channel 3 of the housing 1 and channels 8 of the cone 5.

A single cone bit works as follows.

poo ki no doo

When the housing 1 rotates, the eccentrically offset pin 4 begins to rotate around the geometric axis of the housing 1. As a result, the edges of the cone 5 are successively pressed against the walls of the face. The flushing fluid reaches the bottom of the well, passing through the chamber 9, communicated with the final 3 of the housing 1 and the through channels 8 of the roller cutter 5, thereby flushing the fluid is directed to bypass the bearings 6 and their wear is reduced.

Editor N. Tupitsa

Order 2986

As a result of the periodic displacement of the chamber 9 and the washing channels 8, reinforced high-speed jets are formed. Increased impact force of the jet contributes to the effective removal of drill cuttings. This process is also facilitated by the fact that as a result of the location of the through channels 8 in the body of the cone 5, different numbers of channels 8 alternately work with different steps, which creates an instability of the solution flow to a greater extent, and this contributes to the effective removal of sludge.

Claims (2)

Claim 1. Single-bit chisel, comprising a housing with an inclined lower end and a central flushing channel, fixed to the inclined trunnion end, mounted on the trunnion by means of bearings a roller cutter with through longitudinal channels and an inclined upper end facing the lower end of the housing, and a chamber connected to the central flushing channel and channels of the roller cutter, characterized in that, in order to increase the durability of the bit by reducing bearing wear, the chamber is made in the form of a segment located on the lower end of the building ca, and the through-channels communicating with the cone formed at its upper end inclined. 2. Chisel on π. 1, characterized in that the through channels of the cones are made with different pitch.