SU926246A1 - Apparatus for forming passages in rocks - Google Patents

Description

I

The invention relates to the mining industry, in particular to the equipment used in the mining of minerals by the well method.

A device for creating radial channels in the well bore zone is known. The device Coerates the empty fixed and internal movable columns, a diverter with a guide channel. A flexible hose with a nozzle inserted into the opening channel of the opening valve is used as a working member. The supply of this hose to the bottom is carried out by the descent of the movable column. The direction of movement of the organ in the reservoir is beyond the direction of the diverter 1.

The disadvantage of this device is a complex constructive implementation, and the supply of the working body with a flexible nonmetallic tube complicates the process and reduces the effect-. THBHqcTb creation of rising channels in the well bore zone:.

It is also known a device for creating radial channels in the near-wellbore zone, including a string of compressor tubes connected to a diverter, a guide channel through which the tool with a nozzle, a plunger mechanism for reciprocating movement and a speed controller of the tool 2 are passed.

Disadvantage of the known device

10 is its complexity and low productivity in creating uphole channels in the well bottom zone.

The purpose of the invention is to ensure the reliability of the device operation during the creation of rising channels.

The goal is achieved by the fact that the speed controller is made in the form of a cylindrical sleeve, in the grooves of which,

20, sliding blocks are installed with flat springs fastened at the ends with flanges movable relative to the central shaft, the upper flange fastened with the return plungers on the working stroke of the reciprocating movement mechanism. On fng. 1 shows the proposed. device, longitudinal section; in fig. cross section A-A in FIG. one; on fng. 3 is a cross-section BB in FIG. 1. The device (FIG. 1) for forming the rising channels includes a housing 1 connected to the tubing-compressor pipes 2 by means of a diverter 3. On the reel 3, a reciprocating mechanism is mounted, consisting of the plunger 4 of the working stroke and the plunger 5 return and rods 6 of the stroke and return 7. Plungers 4 and 5 together with sleeves 8 and 9 form hydraulic actuators that provide input and output of working bodies 10 from the rock mass. The working bodies 10 were drawn out in the form of metal tubes with nozzles-probes, passed through the opener 3 channels and secured to the working plungers 4. To prevent the nozzle openings from being locked, they were made with the following tips that ensure the constancy of the designed optimal distance from the nozzle holes to the destroyed barriers. The number of working bodies 3 is determined by the internal diameter of the well, physicomechanical and geometrical characteristics. FIG. 2 the device is equipped with, for example, three working bodies. At the upper end of the return plunger 5, a saddle 11l for fitting the control valve 12 is formed. The valve 12 is controlled from the wellhead by a flexible coupling (not shown). The interconnection between the plungers of the working stroke 4 and the return 5 is carried out through the speed regulator 13 by means of rods 6 and 7. The speed regulator 13 (Fig. 1, 3) contains a cylindrical sleeve 14, a central rod 15 flanges 16 and 17, moving relative to the rod 15. In the grooves of the sleeve 14 installed sliding pads 18, fastened with flat springs 19. The housing 1 in the lower part is equipped with a bottom 2O, which houses the flushing valve 21. On the inside top

The housing 1 has sensors of 22 positions. Sensors can be hydraulic or electric.

the diagonal direction, reducing the size of the annular gap between the body 1 and the glen 14. Thus increases the device to create rising channels in rocks, for example, in a productive formation, works as follows. The device is completely mounted and debugged on the surface and then lowered into the well on the tubing string 2 in the zone of the intended opening. Before fixing the device, hydraulic lines are flushed to the wellhead. To do this, lower the column-pump-compressor pipes 2 and lower the flow valve of the purge valve 21 about the bottom of the well and pump the flushing fluid under low pressure through the column of the pump-compressor pipes 2. At the end of the flushing, the tubing string is rigidly attached to the wellhead. In the initial position, the working parts of the U are in the channel of the diverter 3, not protruding beyond the limits of the housing 1. The entire movable system (the mechanism of reciprocating movement, the working bodies, the speed controller of their movement) is in the lowest position. The control valve is open and the flush valve 21 is closed. Next, the working fluid is pumped through the column of pump-compressor pipes 2 into the working bodies 10. At the same time, by acting on the working fluid pressure on the cross-sectional area of the working plunger 4, it is moved and the working bodies fixed on it 1O. The process of destroying the obstacle and moving the working bodies into the channel created by the working fluid flows simultaneously. The specified or calculated speed of movement, of the working bodies 10 is provided by the speed regulator 13 due to the hydraulic resistance of the fluid as it flows in a coaxial gap between the housing 1 and the sleeve 14i. When the channels are created, the upper position sensor 22 signals. In case of a sharp increase in the speed of movement of the working bodies (presence of voids, cavities), the inertial forces that occur, affecting the flanges 16 and 17, push the pads 18 into a gap of fluid, therefore, the computer will dramatically increase the speed of the working bodies. When the working speed is reached, the Proyuin 19 returns the COLOSHI 18 to its original position. The advancement of the working bodies is stabilized.

The return to the initial position of the working bodies in the diverter is secured after the control valve 12 is seated in the seat 11 of the return plunger 5 and the pressurized fluid is pumped into the pump compressor-pipe 2 column. The pressure applied on the end of the return plunger 5 valve 12, thereby returning the working bodies to their original position in the O-Clone.

Claims (2)

1. USSR author's certificate No. 594304, cl. E 21 B 43/114, 1976. 2. USSR author's certificate for application No. 2674831/22-ОЗ, cl. E 21 V 43/114, 1978. P : 1 Fie.2 Fig.Z