SU1033712A1 - Arrangement for isolating hazard zones in wells - Google Patents

Abstract

DEVICE FOR ISOLATION ZONES. COMPLICATIONS IN THE WELL, run-down on pipes, including a chisel, an adapter, a reflector made in the form of a screw with spiral turns opposite to the direction of rotation of the bit, a piston with radial and axial bore holes and spring-loaded fingers covering the holes. a container divided into two sections, at the top of which there is a movable piston connected to the reflector and a chisel, and dry grouting material is placed, and the bottom section is made with a shear bottom and spiral grooves along a generatrix for fixation in that, in order to improve the quality and efficiency of tamping by ensuring reliable fixation of the piston of the device in the working position, an annular groove at the level of the spigot is performed on the inner surface of the lower section grooves, and the ends of the spring-loaded fingers are rectangular in the vertical plane and rounded along the inner radius of the container in the horizontal plane, moreover, the guide has grooves and the fingers have cylindrical projections located in the grooves O of the piston. with so

Description

i The invention relates to mining and can be used in the drilling of wells to isolate zones of absorption and water inflow. A device for isolating zones of complications in wells, running down on pipes, including a chisel, an adapter and a reflector, is located above the bit and made in the form of a screw with spiral turns opposite to the direction of rotation of the bit. A disadvantage of the device is the need to preload the tamping material. and the subsequent descent of the tool itself, which requires a considerable amount of time. The closest technical solution to the present invention is a device for isolating complication zones in a well, running down on pipes, including a chisel adapter, a reflector made in the form of a screw with spiral turns, opposite to the direction of rotation of the bit, a piston with radial and axial bores openings and spring-loaded fingers that cover the openings, a container divided into two sections, in the upper of which there is a movable piston connected to the reflector and a chisel, and a dry grouting material is placed, and the lower section is provided with a shear bottom and spiral grooves along the C23 forming to fix in the last spring-loaded fingers. A disadvantage of the known device is the possibility of failures in operation due to the slipping of spring-loaded fingers through the spiral grooves of the lower section due to spring inertia with a sudden sharp increase in pressure on the piston and an increase in speed, which causes the mobile elements to squeeze The flow is from the internal cavity of the container into the well and makes it impossible to qualitatively and effectively block the interval. The aim of the invention is to improve the quality and efficiency of the tamping by ensuring that the piston of the device is secured in the working position. This goal is achieved in a device for isolating complication zones in a well, which is lowered on a pipe, including a bit, an adapter, a 12 reflector, made in the form of a screw with spiral turns opposite to the direction of rotation of the lot, a piston with radial and axial through holes and spring-loaded fingers that cover the holes, a container divided into two sections, the upper of which has a movable piston connected to the reflector and a chisel, and a dry grouting material is placed, and the lower section is made with shear bottom and spiral grooves along the forming for fixing in the last spring-loaded fingers, on the inner surface of the lower section: ring groove at the level of the spiral grooves, and the ends of the spring-loaded fingers are rectangular in the vertical plane and rounded along the inner radius of the container in the horizontal plane, moreover, the piston has a guide groove, and the fingers have cylindrical protrusions located in the grooves of the piston. FIG. 1 shows the device, a general view; in fig. 2 - the lower part of the device in the working position, longitudinal section; in fig. 3 - view of the spring-loaded finger in the vertical plane; in fig. - section A-A in FIG. 3. The device includes a container 1, a piston 2 with a guide groove 3 and spring-loaded fingers fitted with cylindrical protrusions 5 by a spring 6 and holes 7 a reflector 8 made in the form of an auger with spiral turns opposite to the direction of rotation of the device, chisel 9, sections 10 the bottom of the container with spiral grooves 11, an annular groove 12 at the level of the spiral grooves and a shear bottom 13 holding the dry grouting material H during the descent. For descending into the well, the device is equipped with an adapter 15 connected to the column rilny pipes 16. The device works as follows. Before lowering the device into the well, the piston 2 with a screw reflector 8 fixed on it and a chisel 9 is placed s the upper part of the container 1, a section 10 with spiral grooves 11 and an annular groove 12 are attached to the lower part of the container

A pack of packages with a dry plugging material H is closed and the bottom 13 is locked. The device is lowered into the well by means of drill pipes 16 connected to the device by means of an adapter 15 in the upper part of the container.

The device is lowered to the zone of complication / and then water is pumped through the string of drill pipes 16, under pressure of which piston 2 moves to the bottom of container 1, squeezing cement material 1 out of it. When the piston approaches section 10, fingers A under the action of spring 6 enter in the annular groove 12, while their cylindrical

the projections 5 slide along the guide groove 3, keeping the fingers in a predetermined position. With further forward movement of the piston 2, the ends of the spring-loaded fingers C are in contact with the lower edge of the annular groove 12, holding the piston 2 inside section 10. By rotating the device around the vertical axis, the fingers k are fixed in the spiral grooves 11 of section 10. to grouting material. The mixing is carried out by mixing the material bits 9 with water. The shuttered liquid mixture of a screw reflector 8 crushes into the cracks and pores of the insulated interval, where the mixture hardens.

Thus, the device ensures the elimination of failures in pa6ote, which improves the quality and stability of the tamponing results.

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Claims (1)

DEVICE FOR ISOLATION OF ZONES. COMPLICATIONS IN A WELL, lowered on pipes, including a bit, an adapter, a reflector made in the form of a screw with spiral turns opposite to the direction of rotation of the bit, a piston with radial and axial bore holes and spring-loaded fingers blocking the holes, a container divided into two sections, in the upper one has a movable piston connected to the reflector and the bit, and dry cement material is placed, and the lower section is made with a shear bottom and spiral grooves along the generatrix for fixing in the last single spring fingers, distinguished by the fact that, in order to improve the quality and efficiency of plugging by ensuring reliable fixation of the device piston in the working position, an annular groove is made on the inner surface of the lower section at the level of the spiral grooves, and the ends of the spring loaded fingers. executed- · ι yen rectangular in vertical | planes and rounded inwardly '| MU is the radius of the container in the horizontal plane, with the piston guiding groove and the finger protrusions placed by the piston. has a groove in the grooves