SU1541373A1 - Arrangement for preventing a fall of pipe string with submersible electric pump onto bottom hole - Google Patents

Abstract

This invention relates to the petroleum industry. The goal is improved reliability by preventing premature actuation. The device consists of a casing (T) 3 placed in the column past the reproducing unit and its drive mechanism mounted as a wellhead at the wellhead for interacting with the spring-loaded tube 4 of the spring-loaded roller 4 with the electric current generator 5 installed under the pump 2 to interact with T 3 pairs of spring-loaded additional rollers 6, having at least one generator 7 of electric current. The gnawing unit is made in the form of a conical spot grip 8, a rod 9 placed under it with the main 10 and an additional 11 electromagnets of opposite action. The movable wedges 12 of the gripper 8 are hingedly connected by strips 13 to the rod 9, and the generators 5 and 7 of the rollers 4 and 6 are electrically interconnected by the cable 14 of the pump 2 and the collector 15 of the cable drum 16. When lowering or lifting the CPT 1, the wedge 12 is under its weight lowered way down. Rollers 4 and 6, with reference to QPT 1 and T3, rotate at the same speed. Generators 5 and 7 produce an electric current in the opposite direction. The electromagnets 10 and 11 balance each other, and the rod 9 is in the lower position. In the event of a break in the QPT 1, the roller 4 stops and the speed of rotation of the rollers 6 increases. The rod 9 is affected by the force of the electromagnet 10, the cat

Panin Nikolay Mitrofanovich

Goy Vladimir Leontyevich

dumkin lion nikolaev

Description

The invention relates to the field of the oil industry and in particular to the extraction of oil from wells equipped with electric submersible pumps.

The purpose of the invention is to increase the reliability of the device by preventing premature actuation.

FIG. 1 shows the device, a general view; in fig. 2 - view A on fi 1.

A device for preventing the string of the lifting pipes 1 from falling with the electric submersible pump 2 to the bottom of the well consists of casing 3 placed in the column behind the corrective assembly and its drive mechanism made in the form of a spring-loaded roller installed at the well head with a column 1 with an electric current generator 5 installed under the pump 2 with the ability to interact with the column pipes 3 pairs of mutually spring-loaded additional rollers 6 having at least one generator 7 elect current. The gripping unit is made in the form of a conical die plate 8, a rod 9 placed under it with the main 10 on it and an additional 11 electromagnets of opposite action. Movable

the wedge 12 of the die grip 8 is pivotally connected by means of the strips 13 to the rod 9, and the generators 5 and 7 of the main I and additional 6 rollers are electrically interconnected by means of the cable 1A of the pump 2 and the collector 15 of the cable drum 16.

i

The device works as follows.

During the descent or ascent of the string of pipe 1 in the borehole, the wedge 12 is lowered under the action of its own weight, which ensures a smooth descent of the string 1 into the borehole. Rollers k and 6, interacting with columns 1 and 3, rotate at the same speed. Generators 5 and 7 produce a constant electric current that is equal in strength but opposite in direction. In so doing, the electromagnets 10 and 11 balance each other, and the rod 9 is in its lowest position. In the event of a break in the pipe string 1, the roller k stops and the rollers 6 begin to rotate at an increasing speed. In this case, the rod 9 is acted only by an increase in proportion to the speed of rotation of the rollers 6, the buoyancy force of the electromagnet 10, which exceeds the weight of the wedges 12, through the rod 9 and the bars 13 moves the wedge 12 to their

15

contact with the casing pipe 3, brake the column 1 with the pump 2

When the pump 2 is operating, the collector 15 opens the circuit: the generator 5 is an electromagnet 11. The wedge 12 is in its lowest position under the action of its own weight. In the case of loosening the pump 2 or the pipe string 1 breaks, the rollers 6 begin to rotate with the generator 7. The electromagnet 10 moves the wedge 12 through the rod 9 with the bars 13 and brakes the falling equipment.

Formula of the Invention A device for preventing a string of a lifting pipe with an electric submersible pump from falling onto the bottom of a well, which is housed in a casing string for a matching node and has a drive mechanism thereof, in order to increase the reliability of its operation by preventing premature

 2

five

five

0

The drive mechanism is designed as a spring-loaded roller mounted on the wellhead and interacts with a column of lifting tubes of a spring-loaded roller with an electric current generator installed under an electric submersible pump and can interact with a casing column of a pair of mutually-spring-loaded additional rollers having at least one electric current generator , for the corroborating node is made in the form of a conical spot gripper placed under the rod with the main located on it and The opposite electromagnets are equipped with electromagnets, with the movable wedge of the die grip pivotally connected by means of strips to the rod, and the generators of the main and additional rollers are electrically interconnected by means of the cable of the electric submersible pump and the collector of the cable drum.

Vida

Claims (1)

Formula, invention A device for preventing the fall of the column of lifting pipes with an electric submersible pump on the bottom of the well, containing an anchor assembly located in the casing string and a drive mechanism, characterized in that, in order to increase the reliability of its operation by preventing premature failure 1373 ⁶ batting, the drive mechanism is designed as installed on the wellhead with the possibility of interacting with a 5 column of lifting pipes of a spring-loaded roller with an electric current generator installed under an electric submersible pump with the possibility of interacting with a column of casing pipes of a pair of mutually spring-loaded additional rollers having at least one electric current generator, the anchoring unit is made in the form of a conical ram grab, 15 a rod placed under it with the main ones located on it and additional electromagnets opposite action, the movable wedges ram pivotally capture 20 are connected by means of strips to the rod, and the generators of the main and additional rollers are electrically connected to each other by means of an electric submersible pump cable and a cable drum collector.