SU1521851A2 - Arrangement for loosening/tightening lock joints of drill string - Google Patents

Abstract

The invention relates to a drilling technique and is intended for tripping in the process of drilling wells. The goal is to expand the functionality and improve working conditions. The device is equipped with a locking joint positioning unit. It is made in the form of two jaws 14 and 15 held in a compressed position by means of a spring 13 installed on a common vertical axis 16. A stop 17 of their rotation is placed between the jaws 14 and 15. The jaws 14 and 15 and the stopper 17 are fixed on the sectoral gripping mechanism 1. The jaw 14 is provided with a bracket 18, and the jaw 15 with a stop 19. Sensor 20 is mounted on the bracket 18 to interact with the stop when diluting the jaws 14 and 15. Due to the connection of the jaws 14 and 15 between them by the spring 13, they can move in a horizontal plane the limits limited by the limiter 17. This eliminates the possibility of a false triggering of the sensor 20 with possible changes in the position of the pipe relative to mechanism 1. 2 Il.

Description

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The invention relates to a drilling technique, in particular, to mechanisms used in tripping operations during the drilling of wells, and is an improvement of the device according to the author. St. No. 1357537.

The purpose of the invention is to expand the functionality and improve working conditions.

FIG. 1 shows the device, a general view; in fig. 2 is a view A of FIG. one.

The fastening device of the attachment of the lock joints of the drill string contains a sector locking mechanism with a housing and a rotational drive, with the sector locking mechanism being designed in the form of two coaxially arranged mechanisms 1 and 2 mounted on console support platforms 3 and 4 connected by means of vertical guides 5, 6 movement with the brackets 7, 8 rotatable relative to the common axis, each mechanism is made with the possibility of one-sided and opposite to the other direction of rotation of the sector 9, and the housing is formed as a coaxially located relative to each other Nogo The outer and inner housings (not shown), wherein the inner housing is provided with a focus start position (not shown) and the outer casing - controllable abutment 10 and the intermediate clutch element 11. The drive (not shown) of rotation is made in the form of hydraulic cylinders pivotally connected to the outer and inner housings, with the axes of the hinged joints of the cylinders of the hydraulic cylinders with the outer housing and the rods with the inner housing combined, and the working surfaces of the sectors 9 are stepped. For the vertical movement of mechanisms 1 and 2 serves a hydraulic cylinder 12.

The device is equipped with a locking joint positioning unit, made in the form of two jaws 14, 15 held in a compressed position by means of a spring 13, mounted on a common vertical axis 16, and placed between the jaws 14, 15, the stop 17, jaws 14, 15 and the limiter 17 is fixed on the sector mechanism 1 capture, while one of the jaws (14) is made with the bracket 18, the other (15) with a stop 19, and on the bracket 18 is installed

a sensor 20 for interacting with the anvil 19 when diluting the jaws. The edges of the jaws 14, 15 are equipped with rollers 21. The axis 16 is mounted on a stand 22, which is mounted on the mechanism 1.

The device works as follows.

In the initial position, the hydraulic cylinder 12 holds the sector mechanisms 1, 2 gripping in the upper extreme position. The drill string is raised, stopped with an accuracy determined by the amount of vertical movement of the sector mechanisms 1, 2 of the gripper, i.e. 250-400 mm. When the device is turned on, the drain from the hydraulic cylinder 12 opens and the descent of the mechanism 1 begins with the jaws 14 and 15 placed on it, which, being connected to each other by a spring 13 and hinged on the axis 16 of the post 22, have the ability to move in a horizontal plane within limited by limiter 7, which eliminates the possibility of false triggering of the sensor 20 with possible changes in the position of the pipe relative to the sector capture mechanism 1. At the moment of contact of the rollers 21 of the jaws 14 and 15, they begin to move apart, overcoming the force of the spring 13, and the sensor 20 comes into contact with the stop 19. The sensor 20 is triggered, giving a command to stop the discharge from the hydraulic cylinder 12 and activate the mechanism 1, which carried out in a known manner.

Claims (1)

Invention Formula The device for fastening-fixing the lock joints of the drill string according to the ed. St. No. 1357537. characterized in that, in order to expand the functionality and improve the working conditions, it is provided with a device positioning unit relative to the lock joint, made as two held in a compressed position by means of the spring: to,: jaws mounted on a common vertical axis, and placed between the glitches of the limiter of their rotation, the jaw and the limiting device closed on the sector locking mechanism, with one of the jaws made with a bracket, the other with a 1or, and a sensor on the Kpoi; i; i-teine for for reciprocal interactions with emphasis on separation --.- lus h- :. J 22; v 21