SU649821A1 - Device for cleaning flushing fluid from slime - Google Patents

Description

one

The invention relates to devices and methods for cleaning flush fluid from drill cuttings when conducting exploration wells, and can be used in drilling oil, gas and gas condensate wells.

A device for cleaning drilling fluid from drilling cuttings is known, in which cleaning is based on the deposition of solid particles of cuttings under the influence of its own weight in troughs and septic tanks.

The disadvantage of this device is the poor quality of the cleaning solution.

The closest known device is a device for cleaning flushing fluid from sludge, consisting of 1, from a tank with a tapered base and pipe 2.

However, the device cannot ensure normal cleaning of the solution, since the sludge particles, being in a suspended state, do not have time to settle in tanks and in large quantities re-enter the well, which leads to deterioration of the quality of the solution and drilling performance.

The aim of the invention is to increase the effective cleaning of the flushing fluid due to the deposition of drilling particles.

sludge with greater speed than liquid.

The goal is achieved by the fact that a pipe with a conical

expansion in Nilcia part, and the pipe is connected to the pipe of the second tank.

The drawing shows a device for cleaning the washing liquid of slime from a longitudinal section.

The device consists of tanks 1 and 2 with conical bases 3 and valves 4 for removing the settled sludge. Inside tank 1, a pipe 5 is installed, I finish;

on the lower part. In the central part of the container 2, a cup 13 suspended on the cables 12 is placed, inside which the receiving filter 14 of the thrust pump is placed. The conical expansion 6 and 11 of the pipes 5 and 9 is placed in the transition zone of the bases of the containers 1 and 2 to the cone 3.

The cleaning device for flushing liquid from H1lama works as follows.

The drilling fluid from the drill cuttings (sludge) flows from the well through the chute 8 into the funnel 7 and further along the pipe 5 into the tank 1. As the diameter of the pipe 5 is smaller than the diameter of the tank 1, accordingly, the speed of the moving stream in the pipe will be greater than in the tank. In the conical expansion 6 of the pipe 5, the flow rate drops sharply, however, particles of drill cuttings, having a large specific gravity, will somewhat outpace the speed of the drilling fluid with a lower specific gravity. As a result, the main part of the drilled rock will be deposited on the bottom of the conical base 3 of the tank 1. Then, continuing its movement to the upper base of the tank 1, the solution goes through the nozzle 10 and the pipe 9 with the conical expansion 11 to the conical base 3 of the tank 2, in which the remaining in the solution of the particles of the small fraction. The sufficiently cleaned solution, moving to the surface of the container 2, enters the cup 13,

and from there through the receiving filter 14 of the pump into the well.

Claims (2)

1.Ivachev L. M. Flushing fluids in exploration drilling. M., "Nedra, 1975, with. 116. 2.Golovko V.N. Equipment for preparation and cleaning of drilling fluids. M., 1971, p. 68-69.