UA28339U - Appliance for drillling mud cleaning - Google Patents

Abstract

Appliance for drilling mud cleaning relates to equipment for liquid purification with removal of mechanical admixtures and can be used in oil-and-gas producing, chemical and ore- dressing industries.

Description

Description of the invention

The useful model belongs to equipment for cleaning liquids from mechanical impurities, in particular, to devices 2 for cleaning weighted drilling fluid from the upper phase (slurry) and can be used in the oil and gas production, chemical, coal and mining and beneficiation industries.

A known installation for cleaning drilling fluid |1|) containing a frame, a loading tray, a filter sieve belt, a low vacuum chamber connected to the exhaust fan, installed between the leading and known drums, a drive, a non-linear vibrator installed on the known drum.

The disadvantages of this installation are the insufficient efficiency of cleaning with large flows of drilling mud with a significant mud content in the latter (for example, during drilling) due to the different pressure drop along the length of the working surface of the filter screen belt - the further from the source of air suction, the less pressure difference above and below the tape. In addition, it is impossible to adjust the pressure drop along the length of the working surface of the sieve belt, and the imposition of vibrations on the translational movement of the sieve belt leads to a decrease in the motor resource of the latter.

The closest thing to the proposed device is a drilling fluid cleaning device |2) containing a frame, a loading tray, a vacuum chamber, installed under the filter belt between the leading and driven drums on elastic shock absorbers and equipped with a vibrator with an individual drive.

The disadvantage of this device is the insufficient quality of drilling fluid cleaning due to the impossibility of separating the force impact that creates vibrations and vacuum during cleaning.

The useful model is based on the task of increasing the efficiency and quality of drilling mud cleaning by improving the device due to the separation of the force effect of vibrations and vacuum on the mud and increasing the degree of cleaning this mud from solids.

The task is solved by the fact that the device for cleaning drilling fluid, which contains a frame, 22 loading trays, a vacuum chamber installed under the filter belt between the leading and driven drums, elastic shock absorbers, a vibrator with an individual drive, is additionally equipped with a high-frequency unit for preliminary cleaning of drilling fluid , and a system of rotary shutters is installed in the rarefaction chamber.

The use of the proposed design of the device makes it possible to significantly increase the cleaning productivity due to the reduction of the viscosity of the solution treated with high-frequency vibrations, to ensure minimal losses of the drilling fluid by adjusting the filtering capabilities of the tape along its entire length. In addition, such a scheme of the device allows to increase the degree of purification of the drilling mud from the solid phase and ensure its minimal loss. Gee)

The essence of the proposed useful model is explained by the following drawings: Fig. 1 shows a general 39 view of the device for cleaning the drilling mud (further - the device); Fig. 2 is a view of the device in a longitudinal section.

The device for cleaning the drilling fluid contains a fixed frame 1, vertical racks 2, a support beam 3, leading and driven drums 4 and 5, a filter belt 6, a rarefaction chamber 7, in which a system of rotary shutters 8, a filter belt drive 9, a tension mechanism is installed belts 10, exhaust fan 11, C air nozzle 12, loading tray 13, drilling fluid supply pipe 14, drain nozzle 15. c On the support beam C, the high-frequency block of the previous

From" cleaning (high-speed vibrating screen) 17 with a vibrator 18 and an individual drive 19.

The drilling mud cleaning device works as follows.

The drilling fluid is fed into the device through the nozzle 14. Through the loading tray 13, the high-frequency pre-cleaning unit (high-speed vibrating screen) 17, which is set in oscillating motion from the individual drive 19 by the vibrator 18, enters 49 through the loading tray 13. At the same time, the drilling fluid is screened from large mud particles,

Ge | which is folded at the end of the filter screen belt b and transported to the dump. The filtered drilling mud from the high-frequency pre-cleaning unit 17, with the resulting reduced viscosity, falls on the denser mesh of the filter belt 6. Under the influence of the pressure drop on the mesh surface, so 20 | under it, which is formed by the exhaust fan 11 in the rarefaction chamber 7 with the help of an extractor through the air pipe 12, the drilling fluid enters the rarefaction chamber 7 and flows through the pipe 15, equipped with a non-return valve, into the receiving tank (not shown in Fig.). Due to the fact that the mesh (working) surface of the filter belt 6 is loaded with drilling fluid flowing out of the loading tray 13, unevenly (the flow is greater at the entrance, and the flow is minimal at the end of the surface), there is a need to adjust the pressure drop at the entrance 29 and the outlet of the filter tape 6. In the proposed device, a system of rotary shutters 8 is installed in the rarefaction chamber 7, which allows you to adjust the suction of air from under the surface of the mesh of the filter tape b, thereby regulating the amount of drilling fluid filtration through the mesh section and bringing the device to the desired operating mode , which is required at the time of drilling.

Sources of information 60 1. Patent of Ukraine Mo20385A, IPC E21821/06, publ. 27.02.1998, Bull. Mo1 2. Patent of Ukraine Mo7305), IPC" E21821/06. publ. 06/15/2005, Bull. Mob

Claims (1)

The formula of the invention b5 A device for cleaning drilling mud, which contains a frame, a loading tray, a rarefaction chamber installed under the filter belt between the leading and driven drums, elastic shock absorbers, a vibrator with an individual drive, which is distinguished by the fact that it is additionally equipped with a high-frequency unit for preliminary cleaning of drilling mud, and in the chamber rarefaction, a system of rotary shutters is installed. - (o) (ze) (ze) (ee) s - with . and? ime) (ee) (95) o) 70 3e) c 60 b5