RU71377U1 - DEVICE FOR WELL HYDRAULIC PRODUCTION OF USEFUL FOSSIL - Google Patents

Abstract

The utility model is aimed at simplifying the design of the device and improving its operational properties. The specified technical result is achieved in that the diffuser of the hydraulic elevator device is hydraulically connected to the space between the casing string and the pipe stand by means of a branch pipe, and the length of the lower head is greater than the distance between the casing shoe and the bottom of the reservoir.

Description

The utility model relates to the field of hydraulic mining, in particular to the design of shells for downhole hydraulic mining (SRS) of solid minerals, and can be used to extract solid materials from underground formations through wells.

To date, a significant number of different designs of shells for SRS of solid minerals have been developed (see, for example, A.S. USSR and RF patents Nos. 374453, 602685, 662717, 739240, 762339, 819345, 825966, 899967, 964150, 1002585, 1065601, 1113549, 1265341, 1427071, 1449662, 1461947, 1489139, 1553686, 1608346, 1620631, 1700249, 2111359, 2113591, 2169839, 2272142, etc.).

Despite the significant differences in the designs of the shells according to the above-mentioned A.S., all of them include the following main units: a column of falling pipes, a hydraulic monitor, pulp-giving hydraulic elevator and pulp-dispensing column. The variety of designs of the shells is explained by various in the design of the aforementioned basic units, as well as the inclusion of new units and structural elements in the shells. These technical improvements are aimed at accelerating the process of erosion of the mineral layer, increasing the efficiency of the removal of pulp from the extraction chamber, increasing the depth of development of the mineral deposit, the formation of the extraction chamber with the required size and shape, etc., etc. Ultimately, all this leads to an increase in the technical and economic indicators of SRS of minerals.

At the same time, many designs of shells for SRS have significant drawbacks, which is the reason for their continuous improvement. In this case, it is necessary to take into account the differences in geological conditions of occurrence of a mineral layer, as well as physical and mechanical

mineral properties and host rocks, which also significantly affects the design of shells for SRS.

The well-known "Ejector pump for pumping water from the well" (Special work when drilling and equipping wells for water: Reference / D.N. Bashkatov, S.L.Drahlis and others. - M .: Nedra, 1988, 172-173 p. )

This device consists of the following elements and nodes:

- a coupling for connection with a drill pipe string;

- a shank connected to an external pipe through a sub;

- a hydraulic elevator device consisting of bypass pipes, a working chamber, a nozzle, a mixing chamber and a diffuser;

- branch pipe;

- a packer device consisting of a housing, interchangeable flanges, a sealing ring, a compression nut and a hole.

The invention is known "Device for downhole hydraulic mining" according to the patent of the Russian Federation No. 2113591 (IPC E21C 45/00, published in 1998). This device is taken as a prototype of the claimed utility model. The device according to A.S. No. 21113591 consists of three interconnected parts: the upper head, pipe stand and lower head. The upper tip has two inputs, one of which is designed to supply energy water, the other to supply compressed air. In addition, the head is equipped with an outlet for the expiration of the pulp from the slurry line. The pipe stand includes three columns of pipes installed coaxially to each other, one of which (the outer one) is a high-pressure column, the intermediate one is a slurry pipe and the inner one is an air supply pipe. The lower head contains a hydraulic monitor, slurry receiving windows and a hydraulic elevator, which consists of a hydraulic elevator nozzle, a receiving chamber, a confuser, a displacement chamber, and a diffuser passing into the slurry line. The mixer of the air supply column is located in the slurry conduit above the mixing chamber of the hydraulic elevator and the hydraulic monitor. Upper end of the air supply column through

the input hole of the slurry conduit is brought to the upper end. In addition, the device is equipped with an end hydraulic monitor nozzle, which is located in its bottom. In this case, the hydraulic end face and hydraulic elevator nozzles communicate with the high-pressure column through three tubes and a cavity.

The disadvantages of the prototype: the complexity of the design and conduct of hoisting operations.

The task: to simplify the design of the device and improve its operational properties.

The problem is solved as follows. In accordance with the prototype, a device for SRS of minerals consists of interconnected pipe stand with an input and a lower tip. The lower tip contains a lateral hydraulic nozzle, pulp receiving windows and a hydraulic elevator device consisting of hydraulically interconnected bodies, submarine tubes, separation cavity, hydraulic elevator nozzle, receiving chamber, confuser, mixing chamber and diffuser. At the same time, an end hydraulic monitor nozzle is installed hydraulically connected with the dividing cavity in the bottom of the lower head.

According to a utility model, the hydraulic elevator diffuser is hydraulically connected to the space between the casing string and the pipe stand by a branch pipe, and the length of the lower head is greater than the distance between the casing shoe and the bottom of the reservoir.

Further, the essence of the utility model is illustrated by drawings, which depict the design and operation diagram of the device:

- figure 1 - design of the device;

- figure 2 is a diagram of the operation of the device.

The proposed device consists of interconnected pipe stand 7 with the input 2 and the lower tip (figure 1). The lower head contains a lateral hydraulic nozzle 3, pulp-receiving windows 4 and a hydraulic elevator

a device consisting of a housing 5 hydraulically interconnected, submarine tubes 6, a separation cavity 7, a hydraulic elevator nozzle 8, a receiving chamber 9, a confuser 10, a mixing chamber 11 and a diffuser 12 connected to a branch pipe 13. An end face is installed at the bottom of the lower head a hydraulic nozzle 14, hydraulically connected to the dividing cavity 7. The length of the lower head is greater than the distance between the casing shoe 15 and the bottom of the reservoir 16 (Fig.2).

This device operates as follows.

Preparing for downhole hydraulic production.

Drill a well 17 to the roof of the reservoir 16 (Fig.2), fix its trunk with a casing string 15, which is cemented if necessary. Then the well is deepened to the bottom of the reservoir.

After the well is prepared for hydraulic production, the above-described device is placed in it as a part of the lower head and pipe stand 1 so that the lateral monitor nozzle 3 is located in the zone of the productive formation 16. In this case, the lower head is mounted on the surface so that the outlet of the outlet pipe 13, when working out at full capacity of the productive formation 16, it was located in the well not lower than the shoe of the casing string 75. Input 2 of the head through the injection hose is connected to the pump unit, and output 18 Lonna casing is provided with a switchblade hose.

The process of downhole hydraulic production.

The working fluid under pressure through the inlet 2 (Fig.2) is fed through a pipe stand 7 to the side hydraulic nozzle 3 and simultaneously through the underwater tubes 6 into the separation cavity 7, where it is divided into two streams - one of them approaches the end hydraulic monitor nozzle 14, and the other - to the hydraulic elevator nozzle 8. Through the lateral hydraulic nozzle 3 there is a hydrodynamic destruction of the rock. Further, due to the ejection created by the stream of liquid formed in the hydraulic elevator

nozzle 8, the destroyed rock enters through the slurry receiving port 4 into the receiving chamber 9 and through the confuser 10, the mixing chamber 11, the diffuser 12 and the outlet pipe 13 along the casing string 15 to the surface. In this case, an upward fluid flow passing between the housing 5 of the elevator device and the casing string 15 creates an additional support for lifting the pulp to the surface.

Coming out of the end face of the nozzle 14, the jet of water crushes large pieces of rock formed during the destruction of the productive formation 16 by the side nozzle 3, and also raises large and heavy particles of rock from the bottomhole zone of the well by means of an upward flow of fluid, liquefies the pulp. Due to this, the flow of pulp into the pulp receiving windows 4 is facilitated.

If you need to increase the depth of mining of the reservoir and simplify the transportation of large and heavy fractions of rocks to the surface, you can use airlift. At the same time, an air supply column with a mixer (not shown in the figure) is lowered into the annulus between the pipe stand 7 and the casing string 15.

Compared with the device according to the patent of the Russian Federation for the invention No. 2113591, the proposed design is simpler and less time-consuming during installation and hoisting operations. This is achieved due to the fact that the lower head descends on a single pipe string, using standard drill pipes and a swivel. In addition, a casing string is used as a slurry conduit, and lifting the pulp through the annulus does not require sealing the wellhead. By reducing the number of pipe columns, which in turn increases the annular cross-sectional area along which the pulp is transported, and also due to the upward flow of fluid passing between the housing 5 of the elevator device and the casing string 15, the efficiency of lifting the pulp to the surface is increased.

Effect: simplify the design of the device and improve its operational properties.

Claims (1)

A device for downhole hydraulic mining of minerals, consisting of interconnected pipe stand with an input and a lower head, while the lower head contains a side hydraulic nozzle, slurry receiving windows and a hydraulic elevator device consisting of a body hydraulically interconnected, underwater tubes, a separation cavity, a hydraulic elevator nozzles, a receiving chamber, a confuser, a mixing chamber and a diffuser, and in the bottom of the lower head there is an end hydraulic monitor nozzle, hydraulically ki associated with the separation cavity, characterized in that the diffuser hydroelevating device through the vent pipe is hydraulically connected with the space between the casing string and the tube is put, and the length of the lower tip larger than the distance between the casing shoe and the sole of the producing formation.