SU626190A1 - Mechanism for screwing and unscrewing tubes - Google Patents

Description

The invention relates to devices for fur and for ea. OPERATION and automation of tripping technologies for the repair of three oil wells equipped with electro-electric centrifugal external centrifugal pumps.

It is known ycTpofiCTBo for hoisting operations with submersible electric pumps in wells, consisting of a spindle and a guide device for cable 1.

The disadvantage of this device lies in the impossibility of carrying out the screwing and unscrewing of pump-compressor pipes.

A known mechanism that includes a split slider and a gearbox, a swivel unit 2. It allows you to speed up and ease the descent (ascent) of pipes with a cable due to the fact that the gearbox is equipped with a locking device and a LOOP hinged to the KopinycoiM gearbox.

The known mechanism has the following disadvantages.

When done during the repair of the well while screwing or unscrewing the pipes, there are cases of hitting: white in the shed of the gearbox, which causes damage to the cable. In addition, when the pipe is lowered (risen) into a well equipped with pumps.

It is provided with a cable with a cable when removing the cable from the pipe to pull it through the slit in the slider body above the release bolt. Work on the protection of the cable is performed by the operator of the underground repair of the well manually, namely a hook, and each time the pipe is charged, two operations are carried out with a single, belt transfer of the cable on the release roller.

The aim of the invention is to ensure the safety of the cable from damage during descent (lifting) of tubing.

five

This is achieved there, that the CHai6 gearbox is a locking device, which has been wound in the form of a spring-loaded latch installed by means of a bracket on the gearbox housing.

0

FIG. 1 shows a schematic representation of a pre-positioning mechanism for screwing and unscrewing pipes, a general view; Fig 2 - gearbox, VCD bottom in the position of an open or closed locking device; on

5 of FIG. 3 - locking device.

The mechanism contains a split gearbox / with moving elements, a split handler 2 with a wedge gripper 3, interacting with the gearbox / with the help of a swivel unit 4. Bottom of the gearbox housing is a fixed locking device, in the form of a spring-loaded latch 5, which is attached to the fixed bracket 6 using. finger 7, raklepatany from both sides. The cut beam 6 is inserted into the bracket 8, which is rigidly attached to the surface of the reducer, such as electric welding, and closed with a conservator bolt 9. The limiter 10 has a stroke limiter 10 installed. Spring 11 serves to accelerate the latching stroke.

The screwing and unscrewing mechanism works as follows.

For screwing or unwrapping the tubing, the latter makes a longitudinal movement through the split gearbox /, at the same time the movable latch 5 turns and forces off the shed of the gearbox, then enters the wedge grips 5 and the split spider 2.

When the gearbox is withdrawn from the loosle of the end of screwing or unscrewing, the pipe, with its force, acts on the movable catch 5, opens it and places it in the neural position.

The invention will allow to mechanize operations to protect the cable from being screwed or damaged.

development of pipes, since there is no need for the driver to pull the cable off manually after each descent (lifting) of the pump, and also to completely exclude the possibility of cable damage.

With pai6oTe on boreholes, which are sealed with deep-well pumps, the locking device is quickly and easily removed by loosening the locking bolt 9.

F o r M o l a

The mechanism for screwing and unscrewing the pipes, containing a split cutter and a reducer, a rotatable assembly, characterized in that, in order to ensure the safety of the cable from damage during the descent (lifting) of the pump-compressor pipes, the gearbox is equipped with a locking device made in the spring clamp assembly, installed “On the crown / shteyn on the gearbox housing.

Sources of information taken into account in the survey: shy

1 USSR author's certificate No. 303413, cl. E 21 B 19/00, 1970.

2 USSR author's certificate No. 435346, cl. E 21 B 19/10, 1970.