SU844764A1 - Device for isolating hazard zones in wells - Google Patents

Description

one

The present invention relates to the field of drilling wells, in particular, to devices for isolating zones of complications.

A device for isolating debonding zones is known, which consists of an inner and outer pipe, a yutan, a piston, a spring, a cup, a diffuser, a nipple, centralizers, a cuff, a choke, floating valves, and an adapter ij.

The drawback of the device is that it requires unproductive time for cementing the wellbore in the absorption zone and drilling the cement stone before restoring the original dimensions of the well.

The closest analogue of the invention is a device for isolating zones of complications, consisting of a drilling reflector, a screw reflector, a check valve, a trowel element and an adapter f2j "

The disadvantages of this device are the following:

low mechanical speed of drilling out the germs of the shells with a dry, quick-setting grouting mixture due to the imperfection of the drilling mechanism used for these purposes,

drilling device is not provided. It causes deep crushing of the plug cement mixture into the pores of the cracks of the borehole walls.

The aforementioned drawbacks lead to a high water-cement ratio during mixing, i.e.,

15 dilution of grouting mixtures, reducing the efficiency of grouting operations and increasing their cost.

The aim of the invention is to increase the efficiency of insulating

Claims (2)

20 works due to additional grouting of the toning material into the walls of the well directly in its downhole part. 3 The goal is achieved by the fact that the drilling mechanism is made in the form of a cutter with blades, bend it in the direction opposite to the direction of rotation and are parallel to the axis of the device. Figure 1 shows a General view of the device; figure 2 - section aa of FIG. fig. 3 - view Bfig.1. The device consists of a digging mechanism, made in the form of a milling cutter 1 with blades, carbide inserts 2 reinforced on the end part, auger reflector 3. a check valve 4 made in a vice, a cap with a hemisphere in the upper part, and its 1-piece is four symmetrically located on the outer surface guide pads, between which there are flushing chambers-grooves for Water Passage, an elastic trowel element 5, fixed by the adapter 6. The device works in the following way. In the area of water absorption and water inflow of the well, the dry quick-setting cement mix, which was previously lowered in sealed shells (for example, in polyethylene ampoules J, is destroyed by means of a drilling machine i with simultaneous water mixing. Water for mixing the mixture is pumped through a drill pipe, adapter 6 , the screw reflector 3 and the drilling mechanism 1, while the check valve 4 is pressed to the extreme mimnee position. When drilling the sealed shells break into small pieces, which is complementary The first blocking material and, together with the shut-in cement mix, its curved blades ME are squeezed into the cracks of the absorption zone and the inflows of the well, and in the cramped viscous shut-in solution, when the waterproofing bridge is moved by the screw reflector 3, it is additionally crushed and with a 5-hole splintering wall, the insulating jumper with an auger reflector 3 is additionally crushed and with a 5-hole splintering wall, the insulating jumper is additionally crushed with a screw reflector 3 and the 5 hatching element is additionally crushed and the 5-oz. into the pores and cracks of the borehole walls, forming a waterproof jumper of the water absorption zone and the water inflows without blocking the wellbore -1y. At the end of the drilling pattern 1-sh of the cement mix with a drilling mechanism 1, the check valve 4 closes the opening in the screw reflector 3 and prevents the plug mixture from getting into the drill pipe string. Due to the drilling mechanism, made in the form of a milling cutter with curved blades reinforced with pointed carbide inserts, the mechanical rate of drilling of hermetic casings with a dry quick setting cement mixture is increased several times as compared with a ball bit; water-to-cement ratio is reduced, which contributes to the efficiency and quality of tamping-up work, reducing the waste of time and cost of these works. Claims of the invention A device for isolating zones of complications in wells, including a drilling mechanism, a screw reflector, a check valve, a trowel element and an adapter, characterized in that, in order to increase the efficiency of the insulation work, due to the addition of plugging of the grouting material into the walls, directly into its the downhole part, the drilling mechanism is made in the form of a cutter with blades, bent to the side, opposite to the direction of rotation and located parallel to the axis of the device. Sources of information taken into account during the examination 1. USSR author's certificate No. 689320, cl. E 2 B 33/13. 2. The USSR certificate of the USSR № 451835, cl. E 21 V 33/13, (prototype).