RU56455U1 - DEVICE FOR CAPTURE AND REMOVAL OF DROPPED BAR FROM A WELL - Google Patents

Abstract

The proposal relates to fishing devices used to eliminate accidents in wells associated with the extraction of dangling rods by capturing them on the outer surface. The device comprises a housing having a conical surface and a locking body inside. The bottom case is made in the form of a return funnel. The locking body is made in the form of a ball mounted in the central channel of the housing. The bottom case is equipped with a guiding funnel with a slanted bottom end. The proposed device for capturing and removing dangling rods from the well has a simple design, and a simplified process of manufacturing technology of the device allows to reduce the cost of the finished product. 1 ill. 1 l

Description

The proposal relates to fishing devices used to eliminate accidents in wells associated with the extraction of dangling rods by capturing them on the outer surface.

A device for fixing and gripping objects (copyright certificate, No. 781319, E 21 B 31/02, published by BI No. 43 of 11/23/1980) containing a housing having a conical surface, locking bodies made in the form of turns of a closed spiral, which inscribed in the torus.

The disadvantages of this device are:

- a high probability of breakage of the coil of the springs due to the concentration of contact stresses in them, with a large weight of the extracted emergency pipes;

- it is impossible to transmit significant torque to the emergency pipes, since the spiral coils of the spring will slip relative to the cylindrical part of the pipe.

The closest in technical essence is a device for capturing and retrieving pipes from a well (RF patent for utility model No. 41330, E 21 B 31/12, published by BI No. 29 of 10.20.2004), containing a housing having a conical surface and locking bodies, while the conical surfaces of the body are provided with grooves, and the locking bodies are made in the form of grooved dies installed in these grooves, with the possibility of longitudinal movement along them, while the body from the bottom is made in the form of a return funnel.

The disadvantages of this device design are:

- firstly, the complexity of the design, due to the large number of parts;

- secondly, the complex manufacturing technology of grooves (milling work) and grooved dies, which leads to an increase in the cost of the finished product (device).

The technical task of the utility model is to simplify the design and manufacturing technology of the device without loss of operating efficiency.

The specified technical problem is solved by the proposed device for capturing and removing dangling rods from the well, comprising a housing having a conical surface and a locking body inside, while the housing is made in the form of a return funnel from below.

What is new is that the locking body is made in the form of a ball mounted in the central channel of the housing, while the housing is equipped with a guiding funnel from the bottom with a tapered end.

The figure 1 shows the proposed device for capturing and removing dangling rods from the well.

The device comprises a housing 1 (see the figure), having a conical surface 2 and a locking body 3 inside. The housing 1 from the bottom is made in the form of a return funnel 4.

The locking body is made in the form of a ball mounted in the central channel 5 of the housing 1. From the bottom, the housing 1 is equipped with a guide funnel 6 with the end 7 sloping from the bottom.

The device operates as follows.

The device at the end of the tubing string (tubing) 8 is lowered into the well. For a reliable and convenient grip of dangling rods by means of a guiding funnel 6, screwed onto the lower end of the housing 1, the device is rotated lowered to the upper end of dangling rods (not shown in the figure), while the guiding funnel 6 with its lower beveled end 7 leads the upper end of the dangling booms.

The tubing string 8 is slowly lowered downward, while the upper end of the dangling rods slides up along the surface of the return funnel 4 of the housing 1 and enters the central channel 5 of the housing 1 and raises the locking body 3, made in the form of a ball that slides along the conical surface 2 of the housing 1 and moves up. At a certain moment, the locking body 3 moves (falls off) from the upper end of the dangling rods and falls into the gap between the cylindrical surface of the dangling rods (not shown in the figure) and the conical surface 2 of the housing 1.

Next, they begin to raise the tubing string 8 upwards, as a result, the locking body 3, made in the form of a ball, wedges (fixes) on the cylindrical surface of the dangling rods and the conical surface 2 of the housing 1. Next, the tubing string together with the device and the dangling rods located in it in the fixed position removed to the surface.

In the event of complications when removing dangling rods, torque is additionally applied to the device.

The proposed device for capturing and removing dangling rods from the well has a simple design, and a simplified process of manufacturing technology of the device allows to reduce the cost of the finished product.

Claims (1)

A device for capturing and removing dangling rods from a well, comprising a housing having a tapered surface and a locking body inside, the lower housing being made in the form of a return funnel, characterized in that the locking body is made in the form of a ball mounted in the central channel of the housing, the bottom case is equipped with a guiding funnel with a bottom beveled bottom.