RU2624935C1 - Installation for rough cleaning of solution when drilling wells - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: device includes a feed tube with a slot at the bottom to exit the solution, a rotor surrounding the auger mesh, a pipe with injectors to supply the washing liquid to the mesh, a tank inside which the rotor rotates. The feed pipe is fixed in the tank with the lid. The rotating rotor, located around the supply tube, consists of a squirrel cage welded to a squirrel cage of a screw and a replaceable mesh covering the screw.

EFFECT: increasing the service life of the device by ensuring its automatic cleaning.

1 dwg

Description

The invention relates to the mining industry and can be used when drilling wells.

Drilling fluid coming to the surface from the well can be reused, but for this it must be cleaned of cuttings of cuttings (sludge).

Most often, cleaning is carried out in three stages by devices:

- vibrating sieves,

- hydrocyclones,

- sand and desilter.

Known installation developed by TsINTIHIMNEFTEMASH in 1981, patent SU 1346756 A1.

Known cleaning system (RF patent No. 2030546, CL E21B 21/06, 1995).

A known cleaning system (RF patent No. 2111334, class E21B 21/06, 1998).

All these installations, like many other known devices, are used as coarse cleaning organs for vibrating screens.

Of course, the vibrating screens of these units work well, but it must be taken into account that there is clay in the drilling fluid that seals the holes in the sieves, and it is problematic to remove it from there. Often this is done manually.

The prototype of the invention is patent No. 2376449 dated 12/20/2009. Authors Chernykh Yu.A., Revin P.E. et al.

In this device, the grid is cleaned with a screw without human intervention, but still the grid is not cleaned very well.

The proposed device provides for cleaning the mesh by impact of a jet of water from the opposite side of the mesh, as a result of which the mesh is completely cleaned.

In addition, the proposed device does not have a reciprocating motion of a heavy site. Therefore, the overhaul period of the proposed device will be significantly longer.

The device unit rough cleaning solution.

The assembly of the assembly is shown in FIG. 1. The assembly consists of a tank 1 with a lid. A rotor 2 with an asterisk 3 of the rotor drive, a fixed supply pipe 4 with a longitudinal narrow cut in the lower part and a wash water supply pipe 5 with nozzles 6 are installed in the tank.

Rotor 2 consists of a squirrel cage 7, on which auger 8 with low turns is welded. A replaceable mesh 9 is put on and fixed on the screw 8, which serves to clean the solution.

Tray 10 serves to discharge the sludge, and pipe 11 serves to discharge the purified solution.

Node operation

The solution from the mouth of the rig is fed into the pipe 4, and then poured through a narrow longitudinal slot in the bottom of the pipe. The solution freely passes through the squirrel cage 7 and the screw 8 and gets on the grid 9.

Further, the solution purified from the sludge passes through the grid 9 and enters the tank 1, and then through the pipe 11 is sent to the fine cleaning unit.

The sludge does not pass through the grid, but moves due to the rotation of the rotor along the grid by 9 turns of the screw 8 to the tray 10 and further into the sludge collector.

It is known that some of the drilling fluid always remains in the well. In this device, water for replenishing the solution is periodically supplied through the pipe 5 and nozzle 6 under high pressure to the mesh 9. The water jets clean the mesh from adhering sludge from the inside. As a result, there is no need to manually clean the net from sludge.

Claims (1)

A device for cleaning a drilling fluid, including a feed pipe with a slot in the lower part for fluid outlet, a rotor, a mesh surrounding the screw, a pipe with nozzles for supplying flushing fluid to the mesh, a tank inside which the rotor rotates, characterized in that the supply pipe is fixedly mounted in a tank with a lid, a rotating rotor located around the feed pipe consists of a squirrel cage welded onto the squirrel cage of the screw and a removable mesh covering the screw.

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