SU1240783A1 - Method of decontamination of used water-base clay drilling muds and drilling waste water sediment - Google Patents

Description

The invention relates to methods for treating waste water based mud and drilling mud sludge and can be used in the construction of oil and gas wells.

The aim of the invention is to increase the efficiency of the method by increasing the degree of solidification and shortening the solidification time of the disposed mass, as well as increasing the degree of neutralization of the contamination of Kotf elements

The invention is carried out as follows.

Low-grade chrysotile asbestos (grade 6–7) in an amount of 10–20% by weight of the spent drilling mud or sewage sludge is introduced into the hydraulic flow of the spent drilling mud or sewage sludge. waters The hydraulic flow is created by means of a pump (drilling, sludge or cementing pump aggregate Tai) and an ejector mixer. The mixer is pumped under pressure by the pumped drilling mud or sediment that leaves the nozzle at a speed of 10-60 m / s. The flow of flux creates a vacuum in the npirmem mixing chamber and captures asbestos.

With a flow rate of less than 10 m / s chryzotnasbest

Do not grasp the same

. -,

..-. 0.5

0.4 0.4

eight

0.6

it is unevenly distributed in the spent drilling mud or sediment; at this rate, the mortar may also be blocked by swollen portions of asbestos. The upper speed limit of 60 m / s is determined by the capabilities of the pumps and mixers used,

Clay - the main ingredient of spent drilling mud and sediment of drilling waste water has a negative potential and therefore due to electrokinetic forces it is strongly associated with asbestos into a high-strength mass. The ability of asbestos to coagulate structure, as well as the high water retention capacity, makes it possible to firmly bind the contaminating components. The bond is so strong that it is not broken when the solidified mass is in water.

Laboratory data on the disposal of spent gly-. pure solution (pH 8.2, solid phase 39.64%, water 60.36%, chemical consumption of K11 hydrogen 6.021 kg / m) and sediment of drilling waste water (pH 7.0, solid phase 59.12%, water 40, 88%, chemical oxygen consumption of 6.213 kg / m) offered and known methods are given in Table 1 and 2.

Table 1

0.5 0.5 0.8 0.8

0.6 0.7

1.0 1.5

0.6 0.7 0.9 1.0

0.8 0.9

1.2 1.8

1.0

1.2

1.5

312407834

The analysis of the data presented shows curing and time reduction, which confirms that the use of low-grade shed mass / Table. 1), and also chrysotile asbestos for decontamination provides an increase in

: it increases the degree of neutralization of contaminating components (Table 2).

Drilling wastewater sludge.

Compiled by V. Brrishkina Editor A. Gulko Tehred N. Bohn | salA Proofreader S. Cherni

ZA56 / 21

Circulation 644 Subscription VNIIPI USSR State Committee

on inventions and discoveries: 113035, Moscow, Raushsk mab., 4/5.

Production and Printing Enterprise, Uzhgorod, st. Design, 4.

: it increases the degree of neutralization of contaminating components (Table 2).

. I T a b l and c a 2

Claims (1)

METHOD FOR NEEDLINING WASTE CLAY DRILLING DRILLS ON WATER BASIS AND SEDIMING DRILLING DRILLS. WASTE WATER, which includes curing them with a binding agent and subsequent disposal, differs from the fact that, in order to increase the efficiency of the method by increasing the degree of curing and shortening the curing time of the buried mass, as well as increasing the degree of neutralization of contaminants, as a binding agent low-grade chrysotilasbest (6–7 grades) is used in an amount of 10–20% by weight of the neutralized drilling mud or sewage sludge, and the binding agent is introduced hydraulically cue flow at a flow rate of 10-60 m / s. SU ,, 1240783 is not evenly distributed in the spent drilling fluid or sludge, at this speed it is also possible to plug the mud pipe in 5 portions of asbestos. The upper height of 60 m / s is determined by the lei pumps used. swollen limit is possible - and mix it up - 1 1240783