SU60616A1 - The apparatus for running casing and catching drill rods (drill pipe) during their flight - Google Patents

Description

The proposed apparatus is preassigned for catching drill rods (drill pipes) during their flight in the event of a cable break or similar accident, as well as for keeping casing pipes during their descent.

Its distinctive feature is that the supporting back part of the dies installed in the annular recess of the body has a rounded shape corresponding to the shape of the annular recess. The resulting hinged support joint provides on. Dej: The operation of the clamping dies at the right time and simplifies the design of the device.

FIG. 1 given a vertical section along the axis of the device; in fig. 2 is a top view of one part thereof.

The apparatus is installed under the rotor, thus not interfering with operation.

In the casing / with an annular recess of a semicircular cross section, the supporting ends of the clamping dies 2 are retained, which hold the casing or drill pipe by snapping

The back support part of dies 2 has a rounded outline corresponding to the shape of an annular undercut of body 1, thereby creating a non-hinged support connection.

A lid .3 closing the housing serves to keep the dies 2 from falling out and ensures their correct location.

The cover 5 is equipped with a swivel washer 4 on top, fitted with bolts 6, which enter the annular recess 5 from the outer side of the body}.

A ring 13 is screwed into each of the dies wedges 2, which is hingedly connected with the thrust 7, which is inserted into the slanting slot 11 of the swivel washer 4 with its tip bent upwards. The number of slanting cut is equal to the number of dies in the apparatus.

A swivel washer with a lever system of a conventional device (not shown in the drawing) is connected to a pedal placed above the drill floor, so that when the pedal is pressed, the washer 4 turns on the body 1 counterclockwise.

This movement causes the movement of the bent end of the string 7 in the slot 11 along the periphery and, therefore, the upward deflection of the bottom of the pipe 12 ends of the plates 2.

When lowering the drill or casing pipes, the driller presses the pedal, holding the dies 2 in a raised position, due to 45

beyond which the pipe can descend unhindered.

In the event of an accident or the need to stop the movement of the pipe 12 down, the driller removes his foot from the pedal, wedging his own oz of the lake down to the juxtaposed pipes with the pipe 12 and seizing it. .

When MnHoiBeHHoE stops weight, falling at high speed, the device is experiencing a huge load, but it is advisable to supply it with a pneumatic or spring-loaded shock absorber. In the latter case, the shock absorber consists of two springs 8 and is equipped with bottom guiding pins 9, included in the opening 10 of the fixed part of the rotor.

Subject invention

Claims (3)

1. An apparatus for lowering casing pipes and catching drill rods (drill pipes) during their flight using clamping dies turned from the pedal, mounted under the rotor, characterized in that the back part of the dies installed in the ring | wedges, executed in a rounded-off annular recess, in order to create a headless joint. 2. FORM Execution in the apparatus according to claim 1, characterized with the use of a rotary washer 4 installed with the help of bolts 6 in the annular recess 5 with oblique cuts // for the bent ends of the ends 7 ,. other ends connected ball. but with dies-wedges mi 2. 3. When the device on PP. 1 and 2, the use of a shock absorber 8, provided with bottom guiding pins 9, which enter the holes 10 of the fixed part of the rotor.