SU563481A1 - Breaking device for hook assembly on lift - Google Patents

Description

one

The invention relates to a drilling technique and can be used in drilling rigs for deep drilling.

A safety device is known against dragging hoists into crown blocks of oil rigs using a flexible rope, one of the ends of which is fastened at the end, and a load is attached to the other end.

However, in such a device, it is impossible to reduce the inertial run of the hook block.

A device for braking a hook block during lifting is known, which includes a brake winch, connected through a crown block through a pulley system, and a counteractor.

In order to prevent the hook block from being pulled into the cropblock, a counter-intrusion system is provided, which is triggered when the hook block enters the danger zone of the tower.

The disadvantage of this system is a large inertial run when lifting the hook block, which is regulated by five meters, and the dangerous zone of the tower is six meters. Therefore, in emergency situations, it is impossible to quickly stop the hook block. The significant length of the danger zone limits the technologically useful height of the tower.

The aim of the invention is to reduce the inertia of the hook block.

To do this, a brake unit is installed on the crownblock fast rollers, the drive of which is connected to the winch drum brake.

FIG. 1 shows a device for braking a hook block when lifting, a general view; in fig. 2 - brake-green, general view; in fig. 3 - installation of the brake assembly on the crown block, top view; in fig. 4 - block assembled with tape, transverse and longitudinal

cuts.

The device for braking the hook block when lifting contains a winch 1 with a brake, connected by a pulley rope 2 to the rollers of the crown block 3, and a counteractor 4. On

The fast rollers of the crown block 3 are equipped with a brake unit 5 consisting of brake mite, shaft 7 and axle 8. On the shaft there are two cranks 9 for transmitting the force to the brake bands 6. Braking is carried out using pads 10 for contact with a talted cable 2. For The shaft 11 is used to turn the shaft 7. A bracket 12 with springs 13 is provided to break the ribbon.

Claims (2)

At the time of emergency braking, the force from the brake of the winch 1 is transmitted to the drive I, which rotates the shaft 7. The crankshafts 9 press the brake band b with the brake pads 10 to the moving cable 2. Inventive Formula A braking hook for lifting, including a brake winch, connected through a traveling system with a crown - 5 block, and a countermeasure that differs from teM, which, e - the purpose of reducing the inertia of the hook block, is installed on the crown block fast rollers whose drive is connected to a winch drum brake, rQiJ / ; S FIG. 2 7 / FT . 7 W