SU1395806A1 - Dry plugging tool - Google Patents

Abstract

The invention relates to the field of drilling equipment and improves the performance and reliability of well plugging when drilling with projectiles with removable core receiver, improve performance in fractured and cavernous rocks, improve the quality of plugging by increasing the mixing material of the plugging material in the interval being processed. Snar d, includes gripping - goat 1 with a shoulder collar 2,. rigidly connected by means of plastic strings 3 with dies (P) 4,

Description

The invention relates to a drilling rig and is designed to carry out cement works by means of dry plugging of the absorption zone of industrial fluid or fixing irregular intervals in wells drilled with projectiles with removable core samples (SSC),.,. .

The aim of the invention is to improve productivity and reliability of well plugging when the projectiles with removable core receivers are boosted, and also to increase the efficiency of fractured and cavernous rocks and to improve the quality of plugging by measuring the intensity of mixing of the cement material in the processed interval

This shows a projectile for dry plugging with a trowel in the form of a ring and an elastic material in the transport position, a general VIEW; Fig. 2 shows a section A-A in fng.1; in Fig. 3 a projectile for dry plugging in the working position; Fig. 4 shows a projectile for dry plugging with an element in the form of flexible rods and a trowel bit with a flexible axis in the transport position; Fig. 5 shows a projectile for a dry plugging according to Fig. 4 in the working position of Fig. 6; a section BB of Fig.

I

The dry plugging box (Fig. 1) comprises a gripping head 1 provided with a shoulder collar 2 and connected with plate springs 3 with dies 4,

and acting with a conical sleeve 5, articulated through a pipe 6 with a coupling 7 in the lower part, having a threaded connection with a nipple 8, inside

the shaft 9 with a longitudinal window under the key 10 is placed. Between the end of the nipple 8 and the shaft 9 there is a sealing element L. A longitudinal groove 12 is made in the shaft 9, in which the elastic mash element is installed in the deformed (axially) direction the form of a ring 13 blocked by a sleeve 14 mounted on the shaft 9 with the possibility of axial movement. The lower part of the shaft 9 has a threaded connection with a bit 15.

The tool in the working position is placed in a string of drill pipes 16, provided with a support ring 17 and a drill bit 18, and the elastic ring interacts with the borehole walls.

The trowel element is in the form of elastic flexible rods 19 and chisels with a flexible axis. The upper ends of the rods are rigidly connected to the shaft, and the lower ends to the holder 20 mounted in the longitudinal groove 12 of the wapa 9 with the possibility of axial movement. The sleeve 20 has a threaded connection with a flexible axis 21, and that in turn with a chisel 1 5. The snare works as follows. In the drill string 16, free from the core receiver and lifted from

the bottom, lowering the containers in packing containers by dumping or on the overshot.

Before descending the shell, the plates 4 are set relative to the conical sleeve 5 to the extreme upper position. The projectile is lowered by free-throwing or on the overshot.

With the passage of the bit 15 (FIG. 3) through the crown 18, the sleeve 14 hangs on the latter, as a result of which the elastic trowel ring 13 enters the working position.

When the projectile is seated on the support ring 17 by collet 2 and lowering the drill string 16, the taper sleeve i5 cleaves the plates 4, which enter into U contact with the drill pipe.

pass through it through the plates 4

and conical sleeve 5 torque 20 second bushing, pipe with

chisel 15.

During the rotation of the drill string 16, the bit 15 will drill the packages with plugging material, and the elastic

1. A dry-plugging device, including a gripping head with a bead, rigidly connected by means of plate-springs with dies, and connected with a pinnacle

bottom part, shaft with grouting element and chisel, which differs with the fact that, in order to increase productivity and reliability, the turned-off grouting ring will have the effect of plugging wells with a sleeve,

pouring the mixture into the walls of the well. The presence of elastic flexible rods that form in the process of drilling the trowel element in the form of a flashlight (figure 5), tightly adjacent to the borehole walls, provides for plugging in the tamping mixture and calibration of the well when processing any intervals, including those represented by hard and fractured rocks .

Claims (4)

1. A dry-plugging device, including a gripping head with a bead, rigidly connected by means of plate-springs with dies, and connected with a pinnacle the bottom of the shaft with a grouting element and chisel, which is different from the fact that, in order to increase productivity and reliability but crush the resulting plugging mixture into the cracks and cavities of the well interval being processed. After the waterproofing works are carried out, the drill string is raised, which ensures that the transport position is occupied by the projectile, since the conical sleeve 5, under the action of the weight of the projectile, releases the plates 4 from wedging. With the aid; and the overshot of the projectile for the gripping head 1 is slowly removed to the position when the trowel ring 13 enters the crown 18. At the same time, the dies 4, occupy the extreme upper position relative to the conical sleeve 5, are installed inwards and do not prevent the projectile from being pulled to the surface . The work of the trowel element in the form of flexible elastic rods 19 and bits 15 with a flexible axis 21 occurs with at one output the elastic rods 19 in the working position due to the stop of the bits 15 in the artificial borehole. At the same time, the chisel 15 due to the flexible axis 21 rotates all the cross-section of the well, which increases the efficiency of drilling packaged cement materials and contributes to Rhenium projectiles with removable core receiver, it is equipped with a sleeve installed with the possibility of axial displacement on the shaft, and in the latter a longitudinal groove is made, and the sharpened element is installed in the longitudinal groove of the shaft and closed with a sleeve. 2. Equipment of the POP.1, characterized in that the trowel element is made in the form of a ring of elastic material. 3.Snar POP.1, characterized in that, in order to improve performance in fractured Q and cavernous rocks, it is provided with a clip rigidly connected to the bit and installed in the longitudinal groove of the shaft with the possibility of axial movement, the trowel element is made in The form of elastic flexible rods, the upper ends of which are rigidly connected to the shaft, and the lower ends to the holder. 4.Snar d according to PP.1 and 3, which is distinguished by the fact that, in order to improve the quality of the tampon by increasing the intensity of mixing of the grouting material in the processing interval, it is equipped with a flexible axis associated with the shaft and chisel. 0 FIG. g H y7 / iY I I -/five FIG. Fig4 Re.tsktor L. / 1volynich Compiled by A. Kondratenkov Tehred M.DidykKorrektor A.T. sko 2i -15 5 Vb 6