RU41330U1 - DEVICE FOR CAPTURE AND REMOVAL OF PIPES FROM A WELL - Google Patents

Abstract

1. Device for capturing and removing pipes from a well, comprising a housing having a conical surface and locking bodies, characterized in that the conical surfaces of the housing are provided with grooves, and the locking elements are made in the form of grooved dies installed in these grooves, with the possibility of longitudinal movement along him, while the bottom case is made in the form of a return funnel. 2. The device according to claim 1, characterized in that the number of grooves and correspondingly grooved dies on each conical surface is at least two.

Description

The proposal relates to fishing devices used to eliminate accidents in pipes with wells, namely emergency tools used to extract emergency pipes from a well (for example, broken pump rods) by trapping them on the outer surface.

A device is known for fixing and gripping cylindrical objects (US Patent No. 214455, class 294-86.3, published December 20, 38), comprising a housing having a conical surface and locking bodies.

The main disadvantages of the known device are:

- the absence of a rigid and at the same time elastic connection between the individual locking bodies, which leads to their skew with respect to the plane of the normal axis of the captured body and may cause it to slip relative to the body of the device;

- the lack of initial stabilization of the locking bodies in the plane, the normal axis of the captured object, which violates the condition for simultaneous capture of the object by all elements.

The closest in technical essence to the proposed is a device for fixing and capturing objects (av / s .. No. 781319, E 21 B 31/02, published by BI No. 43 of 11/23.80) containing a housing having a conical surface, locking bodies made in the form of turns of a closed spiral, which is inscribed in a 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 load-carrying capacity (weight) of the extracted emergency pipes in the axial direction;

- 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 technical task of the utility model is to increase the load capacity and torque of the device, depending on the weight of the emergency pipes, in combination with a reliable

and convenient capture in the process of capturing and retrieving emergency pipes from the well.

The specified technical problem is solved by the proposed device for capturing and retrieving pipes from the well, comprising a housing having a conical surface and locking bodies.

What is new is that the conical surfaces of the housing 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 housing from below is made in the form of a return funnel.

Also new is the fact that the number of grooves and, correspondingly, grooved dies on each conical surface is at least two.

Figure 1 shows the proposed device for capturing and removing pipes from the well at the time of capture of the emergency pipe.

Figure 2 shows a section aa of the proposed device for capturing and extracting pipes from a well with three grooves and, accordingly, three grooved dies connected using a dovetail connection.

The device comprises a housing 1 (see Fig. 1) having a conical surface 2 and locking bodies 3. The conical surfaces 2 of the housing 1 are provided with grooves 4, and the locking bodies 3 are made in the form of grooved dies 5 installed in grooves 4 using a T-shaped compounds or dovetail compounds with the possibility of longitudinal movement in them. The housing 1 from the bottom is made in the form of a return funnel 6 for the convenience of gripping emergency pipes 7 (for example, dangling sucker rods), and the housing 1 from the top is equipped with a thread 8 for connection via a blind coupling to the work string (not shown in Fig.).

The number of grooves 4 and, correspondingly, dies 5 on each conical surface 2 is at least two and is selected depending on the expected load-weight of the emergency pipes 7 (Figure 2 shows three grooves with three locking bodies 3 in the form of grooved dies 5 connected at using the dovetail compound).

The device operates as follows.

The device by means of a blind coupling is connected to the working string (not shown in Fig.) And lowered into the well. For reliable and convenient capture of emergency pipes 7 by means of a funnel 6 of housing 1 (see Fig. 1), the device for capturing and removing pipes from the well with rotation is lowered to the upper end of emergency pipes 7. Continue to slowly lower the working column down, while the corrugated dies 5 move apart, passing up the emergency pipes 7 until they abut against the upper inner

end face of the deaf coupling (not shown in FIG.), thus catching a “stop”. Next, the working string begins to be lifted upwards, as a result, the corrugated dies 5 are inserted into the cylindrical body of the emergency pipes 7 along the outer surface, and upon further rise, the corrugated dies 5 are fixed by the emergency pipes 7, which are then removed from the well to the surface.

In case of complications when removing emergency pipes 7, torque is additionally applied to them.

The use of the proposed device for capturing and retrieving pipes from the well, having the necessary load capacity and torque depending on the weight of the emergency pipes, in combination with a reliable and convenient grip, will reduce the time for capturing and removing emergency pipes from the well, which ultimately will reduce the cost emergency work.

Claims (2)

1. Device for capturing and removing pipes from a well, comprising a housing having a conical surface and locking bodies, characterized in that the conical surfaces of the housing are provided with grooves, and the locking elements are made in the form of grooved dies installed in these grooves, with the possibility of longitudinal movement along him, while the bottom case is made in the form of a return funnel. 2. The device according to claim 1, characterized in that the number of grooves and correspondingly grooved dies on each conical surface is at least two.