RU2707606C1 - Method of construction of accumulation sump - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, namely, to method of accumulation sump construction. Method of construction of accumulation sump includes excavation of soil, construction of dicing and laying on the bottom and walls of ditch waterproofing screen. Meshes from the smaller to the coarse with sagging are placed in series so that a gap is formed between the meshes. Number of meshes and size of cells is selected empirically from possibility of passage of liquid and oil to bottom of granary with successive separation of fineness of size of mechanical impurities. At the edges of the mesh they are fixed and isolated from above with a waterproofing material; at that, in one place a channel is left covered with waterproofing material for input under the mesh to the bottom of the pipe for suction of liquid and oil from the barn.

EFFECT: technical result consists in sequential separation of mechanical impurities from liquid wastes and / or oil, excluding the possibility of interaction of these impurities with a waterproofing screen.

1 cl, 1 dwg

Description

The invention relates to the oil industry and may find application in the construction of an oil field, in particular in the construction of a storage barn designed to accommodate drilling waste and / or unauthorized oil spills.

A known method of burial of drilling waste, including the selection of the geometric dimensions of the earthen barn (patent RU No. 2201949, IPC C09K 7/00, B09B 3/00, E02D 31/00, published on April 10, 2003 in Bull. No. 10), removing the fertile soil layer and its storage in temporary dumps for the period of construction of the well, excavation of the excavation pit, erection along its perimeter of the ditching, waterproofing of the bottom and walls of the pit, storage of drilling waste in the formed barn, stratification of drilling waste in the barn into thickened and clarified phases, removal of clarified liquid from the barn phase, introducing into the thickened phase of drilling waste consolidating material and mixing them, neutralizing the thickened phase of waste by curing, backfilling with mineral soil, returning from temporary dumps and evenly distributing the fertile soil layer to mineral soil, characterized in that at the pre-design stage of well construction, according to engineering and geological surveys, the lithological section of the drilling site, at the stage of designing the construction of the well, analytical Even the volume of the earthen barn, providing for an increase in the volume of the barn with respect to the planned volume of waste stored in it by 15-20% for production drilling waste and 25-35% for exploratory drilling waste, and when choosing geometric dimensions, the minimum allowable distance between with the bottom of the barn and the highest level of groundwater, as well as the minimum permissible depth of the upper layer of solidified waste planned for burial, consolidate the selection in laboratory conditions before neutralizing its material and the selection of its ratio with the mass of cured waste, providing mechanical strength of the cured mixture for compression up to 0.2 MPa 28 days after the introduction of the consolidating material, and filling the cured waste with mineral soil is carried out at a depth of their upper layer exceeding the thickness of the fertile soil layer in the area of well construction not less than 1.0 m.

The disadvantages of this method are the difficulty of implementation due to the large number of complex operations, the lack of waste disposal, which requires a large amount of excavation pit, and if the integrity of the waterproofing is violated, it can lead to soil pollution over time.

The closest is the method of construction of a storage barn (patent RU No. 2272869, IPC E02D 31/00, E02D 31/02, E02D 31/04, published March 27, 2006 in Bull. No. 9), including excavation, construction of debris and laying on the bottom and walls of the barn of the waterproofing screen are made of film material with welds, the screen being made with a margin of size and glued with strips of polymer adhesive tape on the other side of the welds perpendicular to the outside with a distance between the strips of not more than 3 m and the strips leading to the outside of the waterproofing e a wound, while one edge of the waterproofing screen is fixed on the barn edge with mounting brackets and sprinkled with soil along the entire length, the screen is gradually welded outward without tension on the bottom and walls of the barn to the opposite edge, the screen edges are loaded in width and form a corrugation on the barn edge around the entire perimeter, fix the corrugation with soil, fix the free edges of the laid waterproofing screen around the entire perimeter of the barn with mounting brackets and sprinkle with soil, and the free edges of the screen in places anovki mounting brackets tuck in two layers, and the bottom perimeter of the barn prigruzami stacked, wherein the dimensions of a waterproofing screen is calculated according to the formulas

A = a + 2.2c + K;

B = b + 2.2s + K,

where A is the length of the screen;

B - screen width;

a is the length of the barn;

c is the depth of the barn;

in - the width of the barn;

K - coefficient taking into account the tolerance for mounting the screen and the formation of the corrugation, K = 2 - 2.5

in addition, on the bottom and walls of the barn in places where rocky soil is present, protective screens made of woven material are located.

The disadvantage of this method is the lack of preliminary sequential separation of coarse rock, sludge and sand in the barn itself, which often leads to breakage of pumping pipes and pumping equipment during periodic breakdown of liquid drilling waste and oil products, and with frequent interaction with the waterproofing screen, it violates its integrity and, as a result, soil contamination.

The technical task of the proposed invention is the creation of a method of construction of a storage barn, which allows to sequentially separate mechanical impurities from liquid waste and / or oil, eliminating the possibility of interaction of these impurities with a waterproofing screen.

The technical problem is solved by the method of construction of a storage barn, including excavation, construction of deboning and laying on the bottom and walls of the barn of the waterproofing screen

What is new is that nets are successively placed from smaller to large with sagging so that a gap is formed between the nets, and the number of nets and the mesh size are selected empirically from the possibility of liquid and oil passing to the bottom of the barn with sequential separation of the size of mechanical impurities, at the edges of the mesh, they are fixed and insulated on top with a waterproofing material, and in one place a channel is left that is blocked from above by a waterproofing material for entering under the mesh to the bottom of the pipe for suction of liquid ty and oil from the barn.

The drawing shows a diagram of a barn in a section.

A method of constructing a storage barn 1 includes excavation of soil 2, construction of a deboning (not shown) and laying on the bottom and walls of the barn 1 of a waterproofing screen 3 (the author does not pretend to look at the screen types and methods of laying them). Inside the barn 1, nets 4, 5 and 6 are sequentially placed from smaller 4 to large 6 with sagging so that a gap h1 and h2 is formed between the nets. The number of grids 4, 5 and 6 (usually two or three grids is sufficient for deposits in the Republic of Tatarstan) and the mesh size is chosen empirically from the possibility of the passage of liquid and oil 7 to the bottom of the barn 1 with sequential separation of the size of the mechanical impurities that remain in the respective grids. The edges of the mesh are fixed (the author does not pretend to be the methods of fixation) and insulated with waterproofing material 8. Top channel 9 is left, which is blocked by waterproofing material from the top - valve 10 for introducing pipe 11 under the mesh to the bottom of the barn 1 (shown conditionally) for suctioning liquid and oil from the barn 1.

Structural elements and technological connections that do not affect the performance of the barn are not indicated on the drawing or are indicated conditionally.

An example of a specific implementation.

They removed the soil 2 to obtain a barn 1 of the required volume and shape (according to the project documentation), made a deboning. Previously, the walls and the bottom were reinforced with a mesh with cells 4 × 4 made of fabric materials (burlap), a waterproofing screen 3 made of film material was laid on top and fixed on the edge. Inside, with sagging, mesh 4, 5 and 6 were successively installed from wire 1 mm thick made of stainless metal: the first 4 with 2 mm cells, the second 5 with 4 mm cells, the third 6 with 10 mm cells. Between grids 4 and 5, 5 and 6, the gap h1 = h2 = 50 ± 10 mm was maintained. The ends of the nets 4, 5 and 6 were fixed with brackets along the edge and laid on top along the edges with a waterproofing material 8 made of film material. In one place on the edge, channel 9 was made through waterproofing material 8 and nets 4, 5 and 6 with a diameter of 20 mm. The edges of channel 9 were filled with thermoplastic plastic for fixation during cooling from displacement. Channel 9 was blocked from above by valve 10. During operation, liquid and oil 7 flows into the barn 1 from above and passed sequentially through screens 6, 5 and 4, first clearing of large mechanical impurities, settling at the bottom of the barn 1. As they fill with liquid and oil, 7 of all the barn 1 was pumped out, for this we adjusted the container with pumping equipment (not shown), the pipes 11 from which through the channel 9 after opening the valve 10 were lowered to the bottom of the barn 1 and pumped out liquid and oil 7. After that the pipes 11 were removed and the valve 10 closed the channel 9. For a year of operation And the waterproofing screen 3 was never damaged, the pumping equipment did not fail, the grids 4, 5 and 6 did not require replacement due to the total large filtering area (throughput did not change).

To remove the nets 4, 5 and 6 from the barn, pipes 11 pumped liquid and oil 7, waited for the final drainage of liquid and oil into the barn 1 from the nets 4, 5 and 6. After that, the nets 4, 5 and 6 were disconnected from the edges of the barn from three sides 1 and pulled to the fixed edge. The nets 4, 5 and 6 were twisted together and, having previously been disconnected from the remaining edge of the barn 1, they were wrapped in a waterproofing material - a film (not shown). In this form, it was delivered to a processing workshop (not shown), where the nets 4, 5 and 6 were removed from the film, treated with steam and hydrocarbon solvents to clean liquid and oil 7, and each mesh 4, 5 or 6 was purged and washed, and it was cleaned of mechanical blockages isolated from impurities. Grids 4, 5 and 6 are ready for installation (similar to that described above) for further work.

The proposed method for the construction of a storage barn allows you to consistently separate mechanical impurities from liquid waste and / or oil, eliminating the possibility of interaction of these impurities with a waterproofing screen.

Claims (1)

A method of constructing a storage barn, including excavation, deboning, and laying a waterproofing screen on the bottom and walls of the barn, characterized in that nets are successively placed from smaller to large with a sag so that a gap is formed between the nets and the number of nets and the mesh size empirically chosen from the possibility of the passage of liquid and oil to the bottom of the barn with sequential separation of the size of mechanical impurities, fixed at the edges of the mesh and insulated with waterproofing material, and in one place they leave a channel blocked from above with waterproofing material to enter under the nets to the bottom of the pipe to aspirate liquid and oil from the barn.

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