SU1609935A1 - Borehole reamer - Google Patents

Abstract

The invention relates to a drilling technique and can be used in mining and construction for expanding pre-drilled wells or for cleaning the walls of a well. The goal is to increase reliability in work. The expander includes a housing 1 in which an electric motor 2 is placed, reducing gear 3 with a torque limiter 4 and a screw shaft 5. At the last, a coupling (M) 6 with levers 7 having T-shaped ends is placed with the possibility of reciprocating motion. On the housing 1, by means of the axles 10, paws 11 are fixed with grooves 12 in which the T-shaped ends of the levers are placed, and the cones 13. During the rotation of the screw shaft M 6, depending on the direction of rotation of the shaft, the electric motor moves up or down. Movement M 6 is limited by stops 8.9. When moving up the ends of the levers 7 in the slots 12 of the paws 11, the paws 11 turn with the cones 13 and move them out of the housing 1. When the cones come into contact with the rock, the well expands. 2 Il.

Description

translational motion is placed (M) 6 with levers 7 having T-shaped ends. On the housing 1, by means of the axles 10, the paws 1.1 are fixed with grooves 12 in which the T-shaped ends of the levers are placed and the cones 13. When the screw shaft M 6 is rotated, depending on the direction of rotation

The motor shaft moves up or down. The movement of M 6 is limited by stops 8, 9. When moving up the ends of the levers 7 in the slots 12 of the paws 11, the paws 11 rotate with the cones 13 and rotate them out of the body 1. When the cones 13 contact with the rock, the well expands. 2 Il.

The invention relates to a drilling technique and can be used in mining and construction to expand pre-drilled wells or to clean the walls of a well.

The purpose of the invention is to increase reliability in operation.

FIG. depicts the extender wells, a longitudinal section; figure 2 - section aa in figure 1.

The expander wells consists of a housing 15 located in it an electric motor 2, a reduction gear 3 with a torque limiter 4, a screw shaft 5, on which is placed with the possibility of translational movement of tyfta 6 with levers 7, having T-shaped ends, stops 8 and 9 pivotally fixed on the housing 4 by means of the axes 10 of the legs 11 with the slots 12, in which the T-shaped ends of the arms 7 are placed, and the cones 13.

The reamer works blindly.

I

After the descent dilator in the well

Well, at the required depth include the motor 2, which through the gear 3 and the torque limiter 4

.25

j 35

- 40

thirty

rotates the screw shaft 5. When it rotates, the clutch 6 starts a forward movement up or down depending on the direction of rotation of the shaft of the electric motor 2. The movement of the clutch 6 is limited by the stops 8 and 9. When the ends of the levers 7 move upwards, the paws 11 turn 11 11 with the roller cones 13 on the axis x 9 and the extension of the latter from the housing 1. Upon contact of the cones 13 with the rock, the well expands to obtain a predetermined diameter of the well in the zone of its expansion.

Claims (1)

Invention Formula The expander wells, including the body, the slider with the tabs on the side surface, the working bodies with grooves under the tabs and the drive of the slide, so that, in order to improve reliability in operation, the slider is made the coupling, and its drive - in the form of a screw shaft, on which the coupling is placed, while the protrusions are made in the form of radially mounted levers with T-shaped ends placed in the grooves pivotally connected to the body of the working bodies. FIG. 2