RU93304U1 - COMPLEX FOR PROCESSING AND DISPOSAL OF DRILLING OIL-CONTAINING Sludge - Google Patents

Abstract

 1. A complex for the processing and disposal of drilling oil-containing sludge containing an oil sampling device connected to an oil tank, characterized in that the complex is additionally equipped with a sludge sampling device consisting of a soil pump with a coarse filter and a hydraulic washing pump designed to wash bottom sediment in the zone of drill cuttings intake, both pumps are located on a frame fixed on pontoons and with a boom mounted on it with a varying geometry, on which pump pipelines are attached, etc. and the soil pump is connected to a hydrocyclone, one outlet of which, designed for water outlet, is connected by a pipeline to a water treatment and return water supply device, consisting of a feeder connected to a water tank, one outlet of which is connected to a wash pump, and the second is intended for final water discharge, while the second cyclone outlet, designed to exit the soil, is connected to a soil treatment device consisting of a vibratory tray and two feeders connected to the mixer, while one of the feeders assigned for the supply of coagulant, and the other for the supply of sand, the mixer output is connected to the receiving hopper. ! 2. The complex according to claim 1, characterized in that the complex is additionally equipped with a steam generator with a pipeline, one part of which is designed to supply steam to the zone of intake of drill cuttings, and the second is connected to a water tank.

Description

The proposed utility model relates to the field of the oil industry, in particular, to the field of environmental protection in the development of oil and gas fields and can be used to reclaim the territory occupied by drilling barns located near oil wells, and the artificial soil obtained from drill cuttings can be used for building road filling.

Currently, oil-containing drilling sludges generated during the drilling of oil wells, as a rule, are not processed, but are stacked in the immediate vicinity of the wells, in the so-called drilling barns. In the filled barn, drill cuttings gradually thicken, after which they are covered with soil. The disadvantage of this method is that drill cuttings are not rendered harmless and, therefore, the environment is polluted.

Known technical solution "Technological complex for the processing of oily waste" (RF patent for PM No. 69065, publ. 10.12.2007), which includes heated receiving and intermediate tanks with mixing devices, a unit for supplying the original oil-containing waste, heat-insulated heated tanks for intermediate heating, equipped with low-speed paddle mixers, final heat exchangers, pumping stations, valves, a system of one or more three-phase centrifuges, tanks-n storage ring for the oil and water pumps and collection of solid soil.

This solution is very complex and requires large energy costs for the efficient processing, disposal and disposal of oil-containing drill cuttings directly from the barns.

Closest to the claimed technical solution is the "Complex of industrial installations and devices for the processing of oil-containing sludge" (RF patent for PM No. 81444, published March 20, 2009), which provides the possibility of processing oil-containing drill sludge in the immediate vicinity of boreholes and allows you to transfer drill sludge in a form suitable for transportation.

The complex includes collectors, tank equipment, mixers, dispensers, pumps, interconnected by pipelines with shut-off and control valves. The complex is equipped with a unit for collecting oil from the surface of the barn, connected to the collection of oil products, a pumping unit for the water fraction, which is connected to a heated water collector, the outlet of which is directed to a hydraulic monitor for washing and repulping drill cuttings directly in the barn, the complex is also equipped with a device for making on the surface of the portland cement barn, a device for mixing the resulting mixture, a system for receiving and placing treated portals at the production site with cement of drill cuttings, the production site with hardened drill cuttings has technological connection with vehicles for delivering hardened loose drill cuttings to a stationary redistribution unit having a storage and storage tank connected to a metering hopper directed to a mixer, to which a measuring device connected to a flow meter is connected a limestone flour tank connected to a crushing and grinding unit for natural limestone; the mixer outlet is directed to a rotating calcining a furnace equipped with a furnace connected to a collection of petroleum products, an unloading device, a calcining furnace is connected via a conveyor belt to a crushing and grinding department having a storage tank, the output of which, through flow-stop valves, forms two commodity Portland cement streams, one of which is directed into the metering hopper technologically connected to a device for depositing Portland cement on the surface of an oil barn, and the other is directed to a filling machine.

Oil-containing drill cuttings are processed in several stages. At the first stage, oil products are collected from the surface of the barn using an oil intake device and their collection tank is pumped, from where they are then sent to the furnace.

At the second stage, using a hydraulic monitor, the barn is filled with heated water, thereby diluting drill cuttings. After settling the obtained liquid fraction, oil and water fractions are pumped out successively from the surface of the barn. This process of erosion and extraction of petroleum products from sludge is carried out 2-3 times.

At the third stage, Portland cement is added to the surface of drill cuttings remaining in the drill hangar, and everything is thoroughly mixed. The resulting pasty mass is discharged from the barn to the production site.

In a fourth step, drill cuttings treated with Portland cement are transported to a storage tank from which they are loaded into a metering hopper.

In the fifth, drill cuttings are mixed with limestone flour and fed into a rotary calcining furnace. The clinker resulting from the calcination is discharged, crushed and sent to the finished goods warehouse.

This complex processes and neutralizes drill cuttings, however, it is almost impossible to realize and use the complex directly near drilling barns in view of its complexity. Repeated erosion of drill cuttings in a drill hangar requires a lot of time, as well as high energy costs, since a lot of warm water is used to wash the cuttings. The process of mixing sludge directly in the barn and unloading the paste-like mass from the barn is a very time-consuming process and also require large time and energy costs. The use of a rotary calcining furnace and crushing and grinding devices further increase the energy costs of the complex.

The task to which the claimed technical solution is directed is to create a complex for the processing and disposal of oil-containing drilling sludge, which quickly and efficiently translates unused waste sludge into commercial products, namely into building material.

To obtain a technical result, which consists in increasing productivity and reducing time and energy costs, the complex for processing and neutralizing drilling oil-containing sludge contains an oil intake device connected to the oil tank, a sludge intake device consisting of a soil pump with a coarse filter and a pump hydraulic washing, designed to wash the bottom sediment in the area of drilling cuttings intake, both pumps are located on the frame, mounted on the pontoons and installed on the boom with variable geometry on which the pipelines of the pumps are mounted, while the soil pump is connected to a hydrocyclone, one outlet of which, designed for water outlet, is connected by a pipeline to a water treatment and return water supply device, consisting of a feeder connected to a water tank, one the outlet of which is connected to the wash pump, and the second is intended for the final discharge of water, while the second outlet of the cyclone, designed to exit the soil, is connected to a soil treatment device consisting of vibrol failure and two feeders connected to the mixer, while one of the feeders is designed to supply coagulant, and the other to supply sand, the mixer output is connected to the receiving hopper.

For operation in wintertime, a steam generator is additionally installed in the heating complex with a pipeline fixed through the boom, one part of which is designed to supply steam to the zone of erosion of drill cuttings and suction of the pulp, and the second is connected to a water tank.

The essence of the claimed utility model lies in the fact that the use of a device for collecting sludge allows erosion of sludge at any point in the barn, since the frame mounted on the pontoons, on which the pumps are mounted, easily moves along the surface of the water above the layers of compressed sludge, and with using the boom, on which the pipelines are fixed from the pumps, it is possible to adjust the depth of erosion of the sludge. The location of the soil pump and the wash pump on the frame in close proximity to each other, allows erosion of drill cuttings in the area of its intake. As a result, a rather small amount of water is spent on the erosion of the sludge and additional mechanization is not required to remove the sludge from the barn, as the liquefied sludge (pulp) is easily removed using a soil pump, thereby freeing the barn. All this as a result increases productivity and reduces the time and energy costs of processing sludge.

In FIG. The scheme of the complex for the processing and disposal of oil-containing drill cuttings is presented.

The complex (see Fig.) Consists of an oil intake device (UZN) 1 connected to an oil tank 2, a sludge intake device (UZSh) 3, a hydrocyclone (HZ) 4, a water treatment and reverse water supply device (UOVP) 5, a device soil treatment (OOG) 6 and the receiving hopper for artificial soil (PB) 7.

The oil intake device 1 consists of a pneumatic oil collector 8, and a pump 9, which is designed to supply oil to the tank 2.

The sludge collection device 3 consists of a soil pump with a coarse filter 10, and a hydraulic washing pump 11, designed to wash the bottom sediment in the area of drilling mud cuttings. Both pumps 10, 11 are located on the frame 12, mounted on the pontoons 13, intended for delivery of the device 3 to the zone of collection of sludge. An arrow 14 with a changing geometry is fixed on the frame 12, on which the pipelines 15, 16 of the pumps 10, 11 are attached.

Hydrocyclone 4 is designed to separate the pulp into an aqueous solution and soil and, therefore, has one outlet for water 17, and the other for soil 18.

The device for processing and reverse water supply 5 consists of a feeder 19, designed to supply the coagulant to the water, and connected to a water tank 20, one outlet 21 of which is connected through a pipeline to the wash pump 11, and the second 22 is used for the final discharge of water.

The soil treatment device 6 consists of a vibratory tray 23, intended for loading soil into the mixer 24, and two feeders 25, 26, one of which is designed to supply coagulant to the soil, and the second to supply sand to the soil.

The mixer 24, designed to mix soil with coagulant and sand, is connected to a receiving hopper 7.

A complex for the processing and disposal of oil drilling sludge is as follows.

The processing of oil-containing drill cuttings in drill pits is carried out in several stages.

At the first stage, oil products are collected using a pneumatic oil collector 8 from the surface of the barn and pumped using pump 9 into a container 2, from where they are sent for further processing, while the temperature of the oil products must be at least 5 ° C.

At the second stage, directly in the drilling barn, in the device for collecting sludge 3 using a soil pump 10 and a wash pump 11 operating in the suction zone, local erosion and repulpation of the drill sludge occurs, as a result of erosion, a pulp is obtained, which is immediately fed through pipeline 15 with pressure from 5 to 25 atm. to hydrocyclone 4.

The boom 14 mounted on the frame 12, allows you to adjust the location of the intake of pulp and water supply to the wash pump 11.

In the third stage, the aqueous solution is separated from the soil using a hydrocyclone 4, while its productivity reaches 200 m ³ / h.

An aqueous solution, through an outlet 17, is supplied to a treatment and return water supply device 5, and the soil through another outlet 18 to a soil treatment device 6.

Water from the hydrocyclone 4 enters the receiving tank 20 and then through the outlet 21 and the water return pipe to the scrubber pump 15. At the end of the pulp supply to the hydrocyclone 4, a coagulant is supplied from the feeder 19, which ensures the neutralization of water, while the mass the coagulant should be approximately 1-3% of the mass of water available in the tank, at a temperature above 5 ° C., after which the water from the tank 20 through the second outlet 22 is drained for technical needs.

In the fourth stage, the soil obtained from the hydrocyclone 4 enters the soil treatment device 6, first to the vibratory tray 23 and then through it to the mixer 24, into which the coagulant from one feeder 25 and the sand from another feeder 26 fall. In this case, there should be no coagulant more than 5% of the mass of a pound, with a soil moisture of at least 5%, and sand - 10 ÷ 20% of the mass of soil.

As a result of processing with a coagulant and mixing with sand, a building material is obtained - artificial soil, which enters the receiving hopper 7 and further for use in construction.

When working in the winter, a steam generator 27 is used with a pipe 29 installed via an arrow 28 to supply steam to the zone of erosion of drill cuttings and suction the pulp, as well as to heat the water tank 20, while the device for collecting oil 1, the device for collecting sludge 3, a hydrocyclone 4 and a feeder 26 for supplying sand to the mixer is heated by thermal cords or thermoplates.

Claims (2)

1. A complex for the processing and disposal of drilling oil-containing sludge containing an oil sampling device connected to an oil tank, characterized in that the complex is additionally equipped with a sludge sampling device consisting of a soil pump with a coarse filter and a hydraulic washing pump designed to wash bottom sediment in the zone of drill cuttings intake, both pumps are located on a frame fixed on pontoons and with a boom mounted on it with a varying geometry, on which pump pipelines are attached, etc. and the soil pump is connected to a hydrocyclone, one outlet of which, designed for water outlet, is connected by a pipeline to a water treatment and return water supply device, consisting of a feeder connected to a water tank, one outlet of which is connected to a wash pump, and the second is intended for final water discharge, while the second cyclone outlet, designed to exit the soil, is connected to a soil treatment device consisting of a vibratory tray and two feeders connected to the mixer, while one of the feeders assigned for the supply of coagulant, and the other for the supply of sand, the mixer output is connected to the receiving hopper. 2. The complex according to claim 1, characterized in that the complex is additionally equipped with a steam generator with a pipeline, one part of which is designed to supply steam to the zone of intake of drill cuttings, and the second is connected to a water tank.