RU2245352C2 - Method for recultivation of earth warehouse - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: method includes draining liquid drilling wastes, filling warehouse with mineral soil, planning territory, before draining liquid drilling wastes from surface of earth warehouse oil is gathered by forming directed wave flows by air flow, forced by compressor, to place of oil collection in warehouse.

EFFECT: higher quality.

1 dwg

Description

The method relates to mining, in particular to the stage of completing the cycle of cluster construction of oil and gas wells.

There is a method of eliminating a settling-absorption pit, including filling the pit with spent drilling fluid, stratifying it into thickened and clarified phases, curing the moving part of the thickened sludge, applying an impenetrable screen and filling the pit with mineral soil (see Aut. St. USSR No. 1188185, cl. C 09 K 7/02, 1985).

However, the known method has significant disadvantages, which are as follows.

When drilling wells in the case of using oil or oil products in the flushing fluid, the latter, together with the used drilling fluid, enter the sludge pit and increase the hazard class of drilling waste, which is then neutralized by using an impenetrable screen or other method, which consumes significant material, monetary and other resources . With this method of reclamation, oil is lost irrevocably as a natural resource.

The closest analogue to the present invention is a method of reclamation of earthen barns, including waterproofing the walls and bottom, filling with spent drilling fluid, eliminating the fluidity of coagulation clots of the drilling mud with peat and filling with mineral soil (see patent RU No. 2109031, 6 C 09 K 7/02 Bull. 11, 1998).

However, this method has the disadvantage of the following.

In the event that oil or oil products, the density of which is less than the spent drilling fluid, enter the barn, the latter will float on the surface of the waste located in the earthen barn. When pumping out the liquid phase of the waste, their level in the barn decreases, and part of the oil that was on the surface, falling, is retained by the walls of the debris and is absorbed into the soil. In addition, oil also settles on coagulation clots of spent drilling fluid, which remains due to the impossibility of pumping it out of the barn. Thus, the remaining oil increases the hazard class of coagulation clots of spent drilling mud and soil on the walls of the barn. Subsequently, during the restoration of the barn, it is necessary to apply measures to neutralize and neutralize the generated toxic waste, which leads to a significant increase in the costs of the restoration of the barn as a whole.

The purpose of the invention is to reduce the amount of generation of toxic waste from cluster drilling of wells, improving the quality of reclamation of earthen barn.

This goal is achieved by the fact that before pumping liquid drilling waste from the surface of the earthen barn, oil is collected by creating directed wave flows using air pumped by the compressor to the place of oil collection.

The drawing shows a diagram of an earthen barn with waste from well construction, where oil is on the surface of the liquid phase.

The scheme includes the embankment 1 of an earthen barn 2, a compressor 3, which supplies air 4 over a water surface with floating oil 5, which is collected by oil-collecting equipment 6.

The invention is implemented as follows.

After completion of cluster drilling, wells begin reclamation of earthen barn 2 with accumulated drilling waste, on top of which oil 5 floats. Compressor 3 and oil collector 6 are adjusted and installed near the collapse of 1 barn 2 taking into account the wind rose. The air supply 4 should be carried out along the surface of the waste, over which oil 5 floats, behind the wind. Air 4 injected by compressor 3 through the generated wave currents drives oil 5 to the gathering place where the oil gathering equipment is located 6. Oil 5 collected from the surface of the barn 2 is fed to the oil collection and treatment system (not shown) together with the well products to give it a marketable appearance. Having collected floating oil 5, they begin to pump out the liquid phase of the spent drilling fluid. In this case, a strip of oil 5 may remain on the embankment 1 from the inside of the barn 2, which is knocked down by a jet of air 4 pumped by compressor 3 or a stream of the spent drilling fluid liquid phase. Downed from deboning 1 oil 5 with an air stream 4 is directed to the collection point by oil-collecting equipment 6. The collected oil 5 is fed to the oil collection and treatment system (not shown). Having pumped out the liquid phase of the spent drilling fluid, the barn 2 is being rehabilitated by the known technology.

The usefulness of the application of the invention is to prevent the formation of toxic waste to be disposed of, to reduce the cost of reclamation, to improve the quality of the barn reclamation technology.

Claims (1)

A method for reclamation of an earthen barn, including pumping out liquid drilling waste, eliminating coagulation clots of spent drilling fluid, filling the barn with mineral soil, planning an area, characterized in that oil is collected before pumping liquid drilling waste from the surface of the earthen barn by creating directed wave flows using an air stream pumped by the compressor to the oil collection point in the barn.