SU866125A1 - Device for fishing for cable of submersible electric centrifugal pump in well - Google Patents

Description

(54) CABLE FISHING DEVICE

ELECTRIC SUBMERSIBLE CENTRIFUGAL PUMP IN WELL

The invention relates to the repair of oil wells, in particular, to devices for eliminating accidents with a cable of an electro-immersed centrifugal pump (ESP).

Known tools for catching the starting rope and cardboard cable, with the help of which they also produce fishing works for the ESh cable. These tools are fishing rods with hinged or welded hooks Cl3.

The disadvantage of these tools is that the fishing process is tight and unproductive in nature, since with the catch grip the emergency cable is lifted in small pieces. In addition, in order to grip the ECP cable with greater rigidity, it must be squeezed (compressed), i.e. get in the well mass emergency cable. This comes with an additional descent.

into a well print or other similar tool.

The closest in technical essence to the present invention is a corkscrew catching SSL) used for electric drilling to catch a cable, containing a top sub, a housing and a cable pickup unit, made in the form of a fishing helix with a variable pitch fixed in the housing (23.

A disadvantage of the known tool is that the cable is not always gripped, i.e. The process is also lengthy.

IS

The purpose of the invention is to improve the reliability of the device for catching the cable and simplify its design.

This goal is achieved by the fact that the device is equipped with a receiving tube,

Claims (1)

20 spring-loaded bushing and piston, cooperating through screw threading with the housing, and the gripping assembly is made in the form of a flexible element passing through a pore 3, for example a rope, one end of which is rigidly connected to the pipe with a spring-loaded sleeve and placed in the housing above the piston,. Fig, 1 shows the proposed device 4t4 the beginning of the capture of the cable, a general view; figure 2 - the same, after the capture of the cable. The device for catching the ESP cable in the borehole consists of an upper sub 1, body 2, in which plug 3 and spring 4 are placed, is necessary to create tension on the flexible element (rope or cable) 5 after the emergency cable is seized 6. In the lower part of the body on the inside the surface is made a screw groove 7, which interacts with the protrusion of the piston 8. At the bottom, the housing 2 is connected to the receiving pipe 9, which serves to pick up the emergency cable 6. The flexible element 5 is passed through the piston 8, and its ends are rigidly connected to the receiving pipe 9 and the spring nennoy sleeve 3. The apparatus operates as follows. The device for catching the ESP cable is inserted into the well until the broken end of the emergency cable 6 is completely covered. Then the mud pumps are switched on. Under the action of the flushing fluid, the piston 8 begins to move downward, making 2-3 full turns at the expense of the screw groove cut in the housing 2 with the helix angle exceeding the friction angle. When it is installed, the piston 8, winding the emergency power cable of the ESP to the flexible element 5, makes a seizure. Turning off the pumps, start lifting all the emergency cable if the blue is stuck at the bottom of the well, or 54, they cut it off and lift it in pieces. This, the longer the receiving pipe 9, the longer the piece of the emergency cable will be captured. Such an embodiment of capture in the form of a flexible element (for example, a thin steel cable) makes it possible to carry out fishing operations not only with the hard cables of the ESP, but also with individual pipes, rods and other long objects of any shape, if they are not stuck at the bottom of the well. The invention The device for catching a cable of an electric submersible centrifugal pump in a borehole, comprising a top sub, a housing, and a cable grip assembly, characterized in that, with a chain for increasing reliability and simplifying the design, it is provided with a receiving tube, a spring-loaded bushing and a piston cooperating along a screw cutting with the body, and the gripping unit is made in the form of a flexible element passing through the piston, for example a rope, one end of which is rigidly connected to the receiving tube and the other end to the spring-loaded sleeve located in the housing above the piston. Sources of information taken into account in the examination 1.Lovilny auxiliary and cutting tools. Catalog.M., TSINTIHIMNEFTEMASH, 1971, p.26-29. 2, Drilling engineer handbook. T.P. M., Nedra, 1973, p. 167 (prototype).