Storage pit building method

FIELD: oil industry, particularly oil-field construction, namely to built storage pit adapted for oil-drilling waste storage.

SUBSTANCE: method involves digging out ground; erecting banking; forming waterproofing screen of film material with weld seams; connecting polymeric adhesive strips to back film side transversely to weld seams facing outwards so that space between strips is not more than 3 m and strip ends extend over outer screen surface, wherein the waterproofing screen has ample size; securing one end of waterproofing screen on pit edge by shackles and covering thereof with ground along the full pit edge; gradually laying unstrained waterproofing screen on pit bottom and side walls to reach opposite pit edge so that weld seams face outwards; loading screen edges across the full width and forming pleat at pit edge along the full perimeter thereof; securing the pleat with ground; fastening free edges of laid waterproofing screen along the full pit perimeter with shackles and covering thereof with ground; folding free screen edges in two in shackle installation areas and placing cantledge on pit bottom along the full perimeter thereof; placing textile protective screens over rocky ground zones. The waterproofing screen dimensions may be determined from given relation.

EFFECT: increased liquid product storage reliability.

2 dwg, 1 ex

 

The invention relates to the oil industry and can find application in the development of oil fields, in particular in the construction of cumulative barn destined for disposal of drilling wells.

There is a method of construction of the cumulative barns, including hydraulic soil, the construction of the bottom and walls, waterproofing permeable soils (Kolomeitsev V.T. "Construction of foundations for well drilling in Western Siberia. "Overview. Ser. "Oilfield construction), VNIIEM, 1981, p.18).

However, this technology of construction is characterized by the complexity of the process, as it includes a number of works, the following one by one: planning and preparation of the area under the Bush Foundation, the hydraulic or importation of soil, construction of cumulative barn, laying of waterproofing material. Each series of works depending on the terrain consists of smaller operations, the execution of which takes a certain time. As a result, the construction cycle cumulative barn stretched in time.

There is a method of construction of the cumulative barn, including planning, waterproofing permeable soils, which perform different compositions, coatings made from waterproof materials and other with what tavani, and the construction of dikes (see RD-3D-133-94 "regulations on the protection of the environment during the construction of wells for oil and gas on land), NPO Burovaya Tekhnika, 1994, p.40-41).

The main disadvantage of these technologies is the sharp increase in the cost of laying a reliable waterproofing of the bottom of cumulative barn constructed on permeable soil. In addition, the development cycle cumulative barn increases, which leads to higher cost of production.

There is a method of construction of the cumulative barn, consisting in the implementation of the planning, preparation and waterproofing of the bottom of cumulative barn, which takes place simultaneously by laying and compaction of sand-clay mixture with subsequent obalovanie (RF Patent No. 2144112, E 02 D 31/02, 09 At 1/00, publ. 2000.01.10).

The known method leads to a reduction in capital costs and construction time cumulative barn. However, the method does not create a barn with the qualitative protection of the soil against the penetration of stored liquids.

Closest to the proposed invention the technical essence is the method of construction of the cumulative barn, including excavation, construction of dikes and laying on the bottom and walls of the barn waterproofing screen of film material with swar is diversified seams EN 2058473 C1, E 21 B 21/06, 20.04.1996.

However, the method does not create a barn with the qualitative protection of the soil against the penetration of drilling wastes.

The objective of the invention is to improve the reliability of storage of liquids.

The task is solved in that in the method of construction of the cumulative barn, including excavation, construction of dikes and laying on the bottom and walls of the barn waterproofing screen of film material with welded seams, according to the invention the screen do with the stock size and glue strips of polymeric adhesive tape on the other side perpendicularly located outside welds with the distance between the strips not more than 3 m and the output of the strips on the outside of the waterproofing of the screen, with one edge of the waterproofing of the screen is fixed on the edge of the barn mounting brackets and sprinkled throughout the length of the soil, produce gradual laying screen welds out without tension on the bottom and walls of the barn to the opposite edge, prigruzhajut edge of the screen width to form corrugation on the edge of the barn, around the perimeter, fixed corrugation soil, fix the free edge of the waterproof screen around the perimeter of the barn mounting brackets and sprinkled ground, the free edge of the screen in the place of installation of the mounting brackets tuck in two SL is I, and on the bottom of the barn along the perimeter of the stack weights, dimensions waterproofing screen calculated by the formula

A = a + 2,2s + K

In = in + 2,2s + K

where: A is the length of the screen, m;

In - the width of the screen, m;

the length of the barn, m;

with the depth of the barn, m;

in - the width of the barn, m;

K - coefficient taking into account the tolerance on the attachment screen and the formation of corrugations, K = 2 - 2,5

in addition, on the bottom and walls of the barn in some places there are rocky soil have protective screens of woven material.

For clay, loam, debenath and sandy soil To take is equal to - 2, to rock fractured and bulk of 2.5.

If necessary waterproofing screen cumulative barn comply with dimensions, allowing it to overlap the middle of the distance to neighbouring barn.

Features of the invention are:

1) excavation;

2) construction of dikes;

3) insulation;

4) when the excavation formation of the walls of the barn with a slope sufficient to keep the ground from caving;

5) in the joints of the wall with the bottom and sides with the edge on the ground surface forming a smooth transition;

6) remove from the surface of the barn objects that can cause damage to insulation during installation and operation;

7) the supply of barn protective screens in places where the damage is of insulation;

8) use for insulation waterproofing screen of film material;

9) execution of waterproofing screen welds out;

10) the same, with the stock sizes for the formation of bumps on the edge of a cumulative barn;

11) the sizing on the other hand waterproofing screen strips of polymeric masking tape perpendicular to the welded joints with the distance between the strips not more than 3 m and the output of the strips on the outside of the waterproofing of the screen.

12) when installing waterproofing screen fixing side of the screen on the edge of the barn mounting brackets and the powder along the entire length of the ground;

13) gradual stacking of the screen without tension welds out on the bottom and walls of the barn to the opposite edge;

14) the same, while the weights of the edges of the screen width;

15) the same, with the formation of the corrugations of the screen material on the edge of the barn around the perimeter;

16) fixing corrugated ground;

17) securing the free edges of the waterproof screen around the perimeter of the barn mounting brackets;

18) powder ground with simultaneous povorachivanie free edge of the screen in the place of installation of the mounting bracket in two layers;

19) inserting the weights on the bottom of the barn on the perimeter;

20) the calculation of waterproofing screen formula with rounding calculation of the length of the s in a big way to value multiple of five and width multiple of three.

Signs 1-3 are similar to the prototype, signs 4-20 are the salient features of the invention.

The invention

Cumulative barn designed for the collection and storage of the products formed during the drilling and repair of wells, must ensure the environmental safety of natural ecosystems and the population, in particular, to provide a reliable protection against contamination of soil, surface and groundwater by drilling mud filtrate and process fluids for the entire period of construction and repair of wells. Existing design and construction technologies cumulative barn not always provide reliable storage of liquids. The objective of the invention is to improve the reliability of storage of liquids. The problem is solved as follows.

During construction cumulative barn are excavation, construction of dikes and isolation.

The invention is illustrated by drawings, where figure 1 shows the barn, in Fig. 2 - bonding film material polymer strips of masking tape.

The barn includes wall 1 with angle αenough to keep the soil from 2 collapse, the bottom 3, the edge 4 on the ground surface with smooth transitions 5 from wall 1 to the bottom 3 and the top 4. Inside the barn, place protective screens 6 woven materials such as IU the shells are made of polypropylene and similar materials and waterproofing screen 7 of the film material. Protective screens 6 and waterproofing screen 7 is fixed on the edge 4 of the barn mounting brackets 8 and covered the entire length of the edge 4 ground 9. Waterproofing screen 7 has a corrugation 10 around the perimeter and the counterweight ground corrugations 9 10 with an interval of 2.5-3 metres from a Free edge of the waterproofing of the screen 7 in the place of installation of the mounting bracket 8 is subjected to not less than two layers. On day 3 of the barn on the perimeter with an interval of 3-4 m posted the weights of polyethylene bags 11 is filled with a granular material with a density of more than 1 t/m3. Waterproofing screen 7 is made of welded seams 12 out with the stock sizes for the formation of the bumps 10 on the edge 4 cumulative barn. On the other hand waterproofing screen 7 glued strips 13 polymer masking tape perpendicular to the weld seams 12 with the distance between the strips 13 is not more than 3 m and the output of the strips 13 on the outer side waterproofing screen 7.

The construction of the cumulative barn is produced as follows. During construction cumulative barn are excavation, construction of dikes and isolation. When the excavation wall 1 barn shape with angle αenough to keep the soil 2 from collapse. For each type of soil this value is individual and may depend on humidity, temperature, etc. In the joints of the wall 1 with a bottom 3 and with Enki 1 edge 4 on the surface of the soil to form smooth transitions 5. Removed from the surface of barn objects that can cause damage to insulation during installation and operation. Such objects are often the stones with sharp edges, including protruding from the ground. Supply the barn protective screen 6 in the places of possible damage to the insulation. As such protective shields 6 use woven materials like burlap from polypropylene and similar materials. Places of possible damage to the insulation is determined by the composition of the soil. Such places include rocky soils or soils with stony inclusions. For isolation use waterproofing screen 7 of the film material, usually polyethylene film. Use the film thickness of 0.25 mm or more. Film weld heat method for the cutting of the barn. Waterproofing screen 7 perform welds 12 out with the stock sizes for the formation of the bumps 10 on the edge 4 cumulative barn. On the other hand waterproofing screen 7 glue strips 13 polymer masking tape perpendicular to the weld seams 12 with the distance between the strips 13 is not more than 3 m and the output of the strips 13 on the outer side waterproofing screen 7.

Dimensions waterproofing screen 7 are calculated according to formulas with rounding length calculation in a big way to the value of five times and the width is three times:

A=a+2,2s+K

In=in+2,2s+K

where: A is the length of the screen, m;

In - the width of the screen, m;

the length of the barn, m;

with the depth of the barn, m;

in - the width of the barn, m;

K - coefficient taking into account the tolerance on the attachment screen and the formation of corrugations.

For clay, loam, debenath and sandy soil To take is equal to - 2, to rock fractured and bulk of 2.5.

During installation of waterproofing screen 7 fix one edge of the screen on the edge 4 of the barn mounting brackets 8 and sprinkled throughout the length of the ground 9. Produce a gradual laying of waterproofing screen 7 without tension welds 12 out on the bottom 3 and the wall 1 of the barn to the opposite edge 4, while prigruzhajut edge waterproofing screen 7 in width and form a corrugation 10 of material waterproofing screen 7 on the edge 4 of the barn around the perimeter. Fix corrugation 10 ground 9 with an interval of 2.5-3 m the Presence of the corrugations 10 allows waterproofing screen 7 to compensate for the temperature and mechanical deformation at the time of installation and during operation. Fix the free edge of the waterproof screen 7 around the perimeter of the barn mounting brackets 8 and sprinkled ground 9. At the same time the free edge of the waterproofing of the screen 7 in the installation location mounting bracket 8 tuck in at least two layers of 70-100 mm On the bottom 3 of the barn on perime the Roux with an interval of 3-4 m stack the weights of polyethylene bags 11, filled with granular material such as sand, soil with a density of more than 1 t/m3. This is necessary to eliminate the effect of upwelling and sail waterproofing screen 7 in the operation.

A specific example of the method.

Build cumulative barn in accordance with the drawing. When the excavation wall 1 barn shape with angle α=45°that is sufficient to hold from caving ground 2, representing seventy the ground. In the joints of the wall 1 with a bottom 3 and the wall 1 with the edge 4 on the surface of the earth form smooth transitions 5 with a radius in the range from 200 to 300 mm are Removed from the surface of the barn stones with sharp edges, including protruding from the ground. Supply the barn protective screen 6 on the bottom 3 and the wall 1 depth up to 2 m in some places there are stony soil. As a protective screen 6 use the sacking of polypropylene. For isolation use hydroisolation screen 7 of a polyethylene film with a thickness of 0.3 mm. Film weld heat method for the cutting of the barn.

Dimensions waterproofing screen 7 are calculated according to formulas with rounding length calculation in a big way to the value of five times and the width is three times:

A=a+2,2s+K=15+2,2*3+2=23,6 (round up to 25 m)

In=in+2,2s+K=8+2,2*3+2=16,6 (round up to 18 m)

where a is the length of the screen equal to 25 m;

In - width e is wound, equal to 18 m;

the length of the barn, equal to 15 m;

with the depth of the barn, equal to 3 m;

in - the width of the barn, equal to 8 m;

K - coefficient taking into account the tolerance on the attachment screen and the formation of the corrugations, is equal to 2.

During installation of waterproofing screen 7 fix one edge of the screen on the edge 4 of the barn mounting brackets 8 and sprinkled throughout the length of the ground 9. Produce a gradual laying of waterproofing screen 7 without tension welds out on the bottom 3 and the wall 1 of the barn to the opposite edge 4, while prigruzhajut edge waterproofing screen 7 in width and form a corrugation 10 of material waterproofing screen 7 on the edge 4 of the barn around the perimeter. Corrugation 10 is formed by the folding blade width 0.5 m Fixed corrugation 10 ground 9 with an interval of 2.5-3 m the Presence of the corrugations 10 allows waterproofing screen 7 to compensate for the temperature and mechanical deformation at the time of installation and during operation. Fix the free edge of the waterproof screen 7 around the perimeter of the barn mounting brackets 8 and sprinkled ground 9. At the same time the free edge of the waterproofing of the screen 7 in the installation location mounting bracket 8 tuck in at least two layers of 70-100 mm On the bottom 3 of the barn on the perimeter with an interval of 3-4 m stack the weights of polyethylene bags 11, which is filled with sand.

As pok is convened by the practice of the barn, made by this method works reliably and provides isolation of soil from process fluids throughout the required period. Under the waterproofing screen is not observed swellings, sail. Gusts and other violations of integrity issues waterproofing screen is not observed. Leakage of process fluids are completely absent.

The application of the proposed method will improve the reliability of storage of liquids in the barn.

The method of construction of the cumulative barn, including excavation, construction of dikes and laying on the bottom and walls of the barn waterproofing screen of film material with welded seams, characterized in that the screen do with the stock size and glue strips of polymeric adhesive tape on the other side perpendicularly located outside welds with the distance between the strips not more than 3 m and the output of the strips on the outside of the waterproofing of the screen, with one edge of the waterproofing of the screen is fixed on the edge of the barn mounting brackets and sprinkled throughout the length of the soil, produce gradual laying screen welds out without tension on the bottom and walls of the barn to the opposite edge, prigruzhajut edge of the screen width to form corrugation on the edge of the barn, around the perimeter, fixed corrugation ground, closed Plaut free edge waterproof screen around the perimeter of the barn mounting brackets and sprinkled ground, and the free edge of the screen in the place of installation of the mounting brackets tuck in two layers, and on the bottom of the barn along the perimeter of the stack weights, dimensions waterproofing screen calculated by the formula

A = a + 2,2s + K;

In = in + 2,2s + K,

where a is the length of the screen.

In - the width of the screen.

the length of the barn;

with the depth of the barn;

in - the width of the barn;

K - coefficient taking into account the tolerance on the attachment screen and the formation of corrugations, K = 2 - 2,5

in addition, on the bottom and walls of the barn in some places there are rocky soil have protective screens of woven material.



 

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