SU682639A1 - Device for extracting armoured cable from a well - Google Patents

Description

one

The invention relates to the mining industry and can be used in the elimination of accidents with an armored caoel in the well.

A device for removing a broken cable from a well is known, which contains a rod with a pointed end, to which hooks of various shapes are welded in a staggered pattern.

The disadvantage of this device is its low reliability when removing a broken cable from the well.

The most advanced of the invention is a device for extracting an armored cable from a well, containing its body, abutment, sleeve, electromagnet mounted in the body, gripping and pressure compensator 2.

The disadvantage of this device is that it is unreliable in operation during extraction.

The aim of the invention is to improve the reliability of the device by providing the ability to quickly grab and hold the cable.

This goal is achieved by the fact that the proposed device is equipped with a spring-loaded core concentrically stirred in the housing, pivotally connected to the gripper and rigidly connected to the sleeve, with a conical tip with a slit. The gripper is made in the form of dies with an outer conical surface for interaction with a conical tip.

FIG. 1 shows a device for removing an armored cable; in fig. 2 is a section A-A of FIG. one.

A device for extracting a dangling armored cable from a well includes an instrument head 1 connected to a diamagnetic body 2, an abutment 3 entering the guide sleeve 4 of a non-magnetic material. The sleeve 4 is wound with a retraction coil 5. The lower end of the sleeve enters the sleeve 6. The lifting coil 5 is clamped from above by the instrument head 1 through the stop 3, and below by the sleeve 6. Inside the guide sleeve 4 and w) 6 bore 7 is moving with channels to communicate all parts of the device filled with liquid dielectric with a pressure compensator. One end of the core 7 moves up to the stop 3, and the other end is connected with the help of levers 8 to the opening} with the aid of a spring 9 to a gripper 10, made in the form of caps. The gripper 10 moves along a conical tip 11 with a slit along the forming tip. The force spring 12 rests at one end on the end of sleeve 6 and on the other end into an annular protrusion on the bark 7. The pressure compensator 13 is composed of an elastic corrugated tube connected at one end with the plug 6, and the other with a bark 7. The tightness of the device in places Threaded connections are made with the help of o-rings 14 of soft metal (nanometer, copper).

The device works as follows.

By means of a logging cable, the device is electrically connected to the recorder and lowered into the interval of the intended location of the end of the broken armored cable. At this moment, the device operates as a smart detector: the recorder records the EMF curve of magnetic induction caused by a change in the magnetic conductivity between the pole and the device as it passes by the armored cable.

The device is lowered 10–15 m below the end of a broken cable and connected to a DC source. From the current source, a cable and a winding of the retracting coil 5 pass a current, which forms a magnetic field between the instrument head 1 and the conical tip AND, under the action of which the armored cable, located in the well with the device, connects the tip to the zero tips and 7 Attachment to the stop 3, having pulled the grip 10 from the conical undercut of the conical tip I. The grip dies 10 under the action of the spring 9 will disperse, forming a slot sufficient to pass the cable. When lifting, the device moves along the cable held by the magnetic field and around it until the cable fits into the slot of the conical tip 11 and the slot formed by the dies of the clamp 10. When the current source is switched on, the measles 7 returns to the clamp 10 under the action of the return spring 12 initial position. At the same time, the plates with the cable move along the conical undercut of the tip, are compressed and hold the cable by hand. Together with the cable, the device rises to the surface. If a broken cable is tacked, it is torn or torn with the device and lifted but parts, for which the device lowers the logging cable with a greater breaking strength than the recoverable or releases it from the grip with the device, for which the device is lowered until the tension decreases, direct current source. At the same time, the measles 7 prnt nets to the stop 3 and lift from the conical undercut of the tip And the grip 10, the dies of which under the action of the spring 9 will open and release the cable to be removed. In this position, the device is lifted above the end of the broken cable. The latter will break the engagement with the device.

The device can be used to lift a broken armored cable from a cased hole or from a drill pipe string. For this, it is supplied with centralizers of diamagnetic material, which rotate freely around the body.

device. When the direct current source is turned on, the centralizers keep the device from sticking to the wall of the pipe string under the action of a magnetic field, and the free-moving cable is attracted to the pole pieces of the device. In the future, the process of capturing the cable is the same as in the open hole.

Experience in lifting torn

an armored cable from a well-known device on a drill string of pipes shows that the time spent on all fishing operations is 25-28 hours, and the overhead costs of cash

funds - 2800-3000 rubles.

The use of the proposed device for carrying out the same fishing works requires only 5-7 hours with a cost of 400-500 rubles, which will reduce the overhead by 15-20 hours and money by 2-2.5 thousand rubles. just one well.

Claims (2)

1. A device for removing an armored cable from a well, comprising a housing, an abutment, a sleeve, an electromagnet mounted in the housing, a gripper and a compensator pressure, characterized in that, in order to increase the reliability of the device by providing the ability to quickly grip and hold the cable, it is provided concentrically located in the housing with a spring loaded, articulated with a grip and a conical tip rigidly connected with the sleeve with a cutter. 2. The device according to claim 1, characterized in that the grip is made in the form of dies with outer conical surface to interact with the conical tip. Sources of information taken into consideration during the examination 1. Airamov AM, et al. Lovilnye tools and devices used in the operation and overhaul of oil wells. M., Gostoptehizdat, 19o4, p. 45. 2. Author's certificate N ° 171347, cl. E 21B 31/06, 1964. ( (Reg. 2