SU1583579A1 - Apparatus for drilling cased holes - Google Patents

Abstract

BACKGROUND OF THE INVENTION The invention relates to well drilling by erosion, with wall fastening by casing. The goal is to reduce the metal consumption of the device. The casing pipe (OT) 1 has a shoe 2 at the end. A reamer 3 is attached to it above the shoe 2, and a jetting attachment (H) 9 is mounted on the lintel 6. The jumper 6 is connected to OT 1 and placed above the holes 4, OT. 1 and overlapped with valves 5, the nozzle H 9 is directed toward the shoe 2 and is located below the web 6. The flushing fluid is supplied to H 9 under pressure. The resulting pulp enters the annulus formed by moving the OT with the expander 3, and exits to the surface. After immersing the next section, OT 1 is increased. 1 il.

Description

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Ceremychka 6 is connected to OT 1 and is radiated above the openings 4, made to the wall OT 1 and closed with valves 5, the nozzle H 9 is directed towards the shoe 2 and is placed below the jumper 6. Wash liquid is supplied

15835794

in H 9 under pressure. The resulting slurry enters the annulus formed by moving FROM 1 with the expander 3, and goes to the surface. After immersing the next section, OT 1 is increased. 1 il.

The invention relates to the drilling, specifically to the drilling of wells by the method

Rymzv with simultaneous fastening of the walls of casing.

The aim of the invention is to reduce the metal consumption of the device.

The drawing shows a device, a view, a partial section.

A device for drilling wells with casing includes a casing 1 | with a shoe 2 and an expander 3 installed on its outer surface in the lower part. In the walls of the pipe 1 and above the spreader 3, the holes 4 are blocked by a valve 5. Inside the casing of pipe 1 there is a jumper b connected to it by means of a limited 7 installed in the annular groove 8. Jumper 6 is connected with the guide pc monitor nozzle 9, the nozzle of which is directed towards the shoe 2 and is installed below the holes 4, and the jumper 6 is located above the holes 4 "The washing liquid is supplied along. akala 10. The device is immersed by a percussion machine 11.

Device for drilling wells with casing works as follows. Through the channel 10, the flushing fluid enters the jetting nozzle 9 with pressure. High-speed jet erodes the soil and turns on the impact machine 11. Formed with

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the pulp flows through the holes 4 into the annular annulus formed by the expander 3 when moving the device down, and further to the surface. After the section of the casing 1 is immersed, the liquid supply is shut off, the shock machine 11 is disconnected and disconnected. After that, the casing 1 is expanded. Valve 5 prevents the perforations 4 from being clogged by dense fractions of pulp deposited in piping space. Next, the drilling cycle is repeated.

Claims (1)

Invention Formula A casing well drilling device comprising a casing with a shoe, a hydraulic jet nozzle f the nozzle of which is directed to the casing shoe mounted on a jumper j associated with casing j with the aim of reducing the metal consumption, it is equipped with an expander placed on the outer surface of the casing, and valves, and in the walls of the casing in its lower part there are holes, under which valves are placed with the possibility of blocking them, while the bridge is located above the holes, and oplo jet nozzle below them.