SU1382926A1 - Deep-well catching device - Google Patents

Abstract

The invention relates to mining, and allows for the capture of large-sized objects of irregular shape from the bottom of a large diameter well. The device includes a cylindrical body (CC) 1, RING 2 installed in it, a gripping unit in the form of a flexible element (GE) 7, equipped with a tension node. In the axial hole of the ring 2, the adapter 3 is movably positioned with a cup (C) 4 in the lower part and an axial flushing channel 5. In the lower part of the cavity of the CK 1, the sleeves 6 are fixed along its perimeter. ends of the EG 7. Their free ends are passed through the sleeves 6 and attached to the lower end of the C 4. The lower ends of the sleeves 6 and 4 are located on the same level. Moreover, the tension node m. made in the form of a spring-loaded disk 8 or in the form of a roller 12, which interacts with GE 7, and which is pivotally mounted on the CK 1, and the cargo 1 1. After erosion of the sludge on the peripheral part of the well install the device on its bottom. Rotate C 4 and GE 7, cover the cavity of the slab, capturing the retrieved object 16 from below. At the same time C 4 is fixed. It should lift the device. 2 hp f-ly, 3 ill. ffi --f

Description

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The invention relates to mining, namely to an emergency tool for capturing and retrieving large objects of various geometrical shapes from the bottom of a well.

The purpose of the invention is to ensure the capture of large-sized items of irregular shape from the bottom of a large diameter well.

Fig. 1 shows the proposed device, a longitudinal section, in the initial position (with the image of various configurations of the tension assembly); figure 2 - the position of the flexible elements with the radial movement of the glass relative to the body at an angle equal to 120; on fig.Z - the final position of the flexible elements.

The well fishing device contains a cylindrical body 1 with a ring 2 fixed in its cavity, located in an axial hole of ring 2 adapter 3 with a cup 4 in the lower part and an axial flushing channel 5 In the lower part of the cavity of housing 1 along its perimeter there are sleeves 6, in the holes of which flexible elements 7 are omitted, one ends of which are fixed to the lower end of the beaker 4, while others are connected with the tension assembly,

The tension unit can be made in the form of discs 8 installed in guides 9 above ring 2 and spring-loaded relative to the latter with the help of spring 10, as well as in the form of weight 1.1 fixed to the free ends of flexible elements 7 that have been previously passed through rollers 12, hinged on the housing 1.

At the upper end of the ring 2 a spring-loaded retainer 13 is installed, which in the working position interacts with a hole 14 made in the glass 4. A thrust bearing 15 is installed on the ring 2 to better radial movement of the glass 4 relative to the housing 1.

The device works as follows.

The device suspended on a string of drill pipes is lowered into the well without rotation in the position shown in Fig. 1, and the reciprocal rotation of the body 1 and the cup 4 is prevented by the weight of the load 11 or the force of the springs 10. If the bottom of the well, and hence to be cured Item 16 is silted, the device is slowly rotated at a height of 15-20 cm above the bottom, supplying washing fluid through channels 5 and 17, erodes the slurry at the peripheral part of the well. Thus, when installing the device on

the bottom of the lower ends of the housing 1 and glass 4 were below the object to be removed.

Having established the device on a face, begin slow rotation of a glass

4, with the housing 1 under the action

its own weight and weight of the drill pipe string are pressed to the bottom and remain motionless. During the rotation of the glass 4 flexible elements 7 begin to overlap the plane of the slab, the washer 11 or. compressing the spring 10 (figure 2). When the cup 4 is half a turn, the flexible elements 7 completely overlap the plane of the bottom (Fig. 3), capturing the object 16 to be removed from below, and at the same time the spring-loaded clamp 13 is aligned with the hole 14 and fixes the cup 4 from the break, i. the position of the flexible elements 7 in the mesh formed by them. Then follows the rise of the device to the surface.

 With wells of 0.3–0.5 m, it is more expedient to install a spring-loaded disc in the device, and the swap is a suspended load, since the spring travel, equal to the diameter of pipe 3 (rope run), is structurally difficult to ensure.

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Claims (3)

1. A downhole fishing device, comprising a cylindrical body, a ring installed in the body, a gripping unit in the form of a flexible element, located in the axial hole of the ring with the possibility of radial movement of the adapter with the glass in the lower part and the axial flushing channel, a glass fixing unit, characterized in that, in order to ensure the capture of large-sized irregular objects from the bottom of a large-diameter well, it is supplied with the plugs fixed in lower. parts of the body cavity along its perimeter, the flexible elements are provided with a tension assembly installed above the body ring and connected to one of the ends of each of the flexible elements, and the free ends of the latter are passed through the sleeves and fixed to the lower end of the glass, the lower ends of the sleeves and the glass being at the same level. 2, the Device POP.1, characterized in that the node nat ZheNII is made in the form of a disk, spring-loaded relative to the housing ring. 3. The device according to claim 1, characterized in that the tension unit is made in the form of a roller pivotally mounted on the body for interacting with the flexible element and the load. Fi.2 .L