SU751954A1 - Directed drilling tool - Google Patents

Description

one

The invention relates to a device for drilling, more specifically to a device for changing the direction of the borehole.

Directional drilling projectiles are known, including splintering and deflecting units;

1. However, these projectiles are very complex.

design and require additional time for operation.

Also known is a projectile drilling rig, consisting of a deflecting and detaching assembly, a housing, a shaft, a tamping tool, and an i5 lock assembly. In this clearance, the deflecting assembly consists of a housing with a cutout in the lower part and a deflection pad; the cutting unit includes a spacer rubber chamber, saline seals and a drill shaft 20 passing through the chamber; The tamping tool consists of a swivel adapter, a tapered shaft and a chisel; locking unit is designed as a bayoietic lock. The drill shaft is locked with a shell and a cartridge inserted into the bayonet lock. The blocking is necessary to prevent disorientation of the projectile in the borehole when it is moved to the face and is carried out as well as unlocked.

from the surface by inserting or withdrawing a key from the bayoietic lock.

The disadvantage of this projectile is the need for additional time spent on performing the operations of blocking and unlocking the projectile and drill shaft.

The aim of the invention is to increase the efficiency of the projectile by reducing the time it takes for the projectile to be put into position.

This goal is achieved by the fact that the blocking unit is made in the form of a ball cage separator rigidly connected to the casing and located above the spring of a spring-loaded plate, the shaft locking the annular groove to accommodate the ball cages of the separator.

The drill for directional drilling contains a deflection assembly consisting of a body 1 and a deflection pad 2, a detachment assembly consisting of flat springs 3, a sleeve 4, which rotates freely in radial-thrust bearing 5 on a drill shaft 6 having an annular a groove, a sampling tool containing a tapered shaft 7 and a hinged tongue 8. The drill shaft 6, rotated in the basepieces 9 and 10, can, along with them, move along the corns of the shell 1. Blocking the corus 1 and the drill shaft 6 having

An annular groove is made using balls 11 interacting with a drill shaft 6, a seyaarator 12, a spring 13, a piston 14, as well as triangular splines on the body 1 of the projectile and drill shaft 6. The piston 14 senses the pressure of the flushing fluid generated by the throttles 15.

Snar d works as follows.

After it is lowered and oriented, the flushing fluid is turned on. By reducing the cross section of the channel for washing liquid, due to droplets 15, an increased hydraulic pressure is created in the upper part of the drill shaft 6, causing the piston 14 to move downward until it stops at the end of the separator 12. Then the axial movement of the drill shaft 6 is given by the stroke length of the slot 8 In this way, the balls 11 are moved into the undercut of the port 14, the triangular splines of the drill shaft 6 come out of engagement with the splines of the housing 1, the flat springs 3, interacting with the sleeve 4 freely rotating on the drill shaft 6, release the row in the borehole and the drilling process is started.

After drilling a new direction for a stroke, stop the supply of flushing fluid and raise the drill shaft 6. This closes the splines of the housing 1 with the splines of the drill shaft 6, the projectile is released from fixing, and the piston 14 is moved up by the action of the spring 13 on the balls And and install them in a circular groove of the drill shaft 6. Next, the projectile moves to the face. The pushing force of the projectile in the curved section of the well is transmitted to the projectile body from the drill shaft 6 through the balls I and the separator 12.

Using the proposed projectile for directional drilling will reduce the time spent on auxiliary operations.

Claims (2)

1.Sulakshin S.S. and others. Technique and technology of directional drilling of wells. M., “Nedra, 1967, p. 132-135. 2. Morozov Yu. T. Drilling of drilled and multilateral wells of small diameter. M., “Nedra, 1976, p. 85. t t