Method of tightness testing for underground reservoir arranged in soluble rocks through drill well

FIELD: mining.

SUBSTANCE: underground reservoir filled with a brine is equipped with a casing pipe and a hanger pipe, test intervals are identified, interval injection of a test fluid is carried out into a tube space of casing and hanger pipes until the test fluid-brine interface reaches the lower elevation of the test interval with simultaneous displacement of brine to day surface. Application of test pressure is carried out with a time delay for each identified test interval and detection of pressure drop rate. Then the test pressure is repeatedly applied with additional pumping of the test fluid, afterwards value is determined, as well as leakage intensity by pressure drop rate and volume of added test fluid. At the same time, according to the invention, prior to application of test pressure, a hanger pipe block is installed under the casing pipe block, the lower elevation of the investigated interval is identified by volume of brine displaced from the underground reservoir and by values of test fluid and brine pressures measured at the wellhead in the period of underground reservoir pressurising. At the same time application of test pressure is carried out in stages by means of increasing it in the following sequence: 0.5 Ptest, 0.75 Ptest, Ptest, where Ptest - test pressure, with staged soaking of the underground reservoir in time under the specified pressures until the temperature background is balanced for the injected test fluid, brine and rock that holds the underground reservoir. Pressure drop rate is identified at each stage of the underground reservoir soaking in time under applied pressure, and value and intensity of leakage within the range of the identified test interval are set by averaged value of added test fluid volume during the period of staged application of pressure to the value of the test one.

EFFECT: increased reliability of testing for tightness of underground reservoirs.

1 dwg

 

The proposed method applies to mining, and in particular to methods of determining the tightness of underground storage tanks, created in deposits of rock salt through drilling wells for the storage of liquid and gaseous hydrocarbons.

The known method of test wells and production-capacity underground reservoir, comprising the injection of the test fluid in the annular space between the casing and the outer outboard columns of tube wells in a volume exceeding the volume of this space, bringing the level of the test fluid to the level of the roof capacity with simultaneous displacement of brine on the Central pillar, the increase of pressure at the wellhead to the value of the test pressure by pumping brine into the Central column and the extract wells and production-capacitance under test pressure for a specified period of time. The tightness of the system is determined by comparison of pumped and selected quantity of test fluid is adjusted for temperature [1].

The disadvantage of this method is the inability to determine the location and amount of leakage, as well as a low degree of precision.

There is a method of leak testing technology wells and underground storage tanks, including the injection of the test fluid in the borehole while simultaneously vitezne the AI brine or water from the underground storage tank, the pressure increase up to the value test and endurance wells and production-capacitance under test pressure. While producing interval injection of the test fluid at the same time in the tube space of the casing and the outer suspended columns, pipes and tube space of the Central outboard casing, control the pressure differential between the pipe spaces during aging wells and production-capacitance under test pressure, then measure the amount released from the well test fluid, corresponding to the change in differential pressure, and determining the magnitude of the leakage volume released test fluid and duration of exposure [2].

The disadvantage of this method is the necessity of using two outboard columns of the pipes and fill the test fluid annulus of the casing and the outer suspended columns of tubes and tube space of the Central outboard columns, and a rather complicated layout tying the mouth of the well with a large number of gates.

Closest to the proposed technical solution is a method of testing an underground tank leak involving the installation of an underground tank, filled with brine, casing and hanging columns of tubes, the separation is of the intervals tested, interval injection of the test fluid in the annulus of the casing and hanging columns of pipes before reaching the boundary of the section "testing the fluid - brine" bottom mark interval tests with simultaneous displacement of brine on the surface, the imposition of the test pressure and the exposure time of each frame of the test under the test pressure with the determination of the rate of its fall, repeated application of the test pressure with download resume function test fluid, determining the size and intensity of the leak volume datacaching fluid [3].

The disadvantage of this method is the complexity of the operations associated with multiple descent of the working of the suspended pipe string into the borehole, and a sufficiently high accuracy of measuring the amount of leakage.

Our problem is to increase the reliability testing of underground storage tank leak by increasing the accuracy of determining the leakage of the test fluid.

This increases the reliability of determining the location and amount of leakage, reduced complexity and time spent on testing.

The method of leak testing an underground reservoir, created in soluble rocks through the borehole, is the installation of an underground re is ervoir, filled with brine, casing and hanging columns of tubes, the allocation interval test interval injection of the test fluid in the annulus of the casing and hanging columns of pipes before reaching the boundary of the section "testing the fluid - brine" bottom mark interval tests with simultaneous displacement of brine on the surface, the imposition of the test pressure and the exposure time of each frame of the test under the test pressure with the determination of the rate of pressure drop, repeated application of the test pressure with download resume function test fluid, determining the size and intensity of the leak rate pressure drop and volume datacaching test fluid. According to the proposed technical solution before applying the test pressure Shoe hanging the tubing placed under the Shoe of the casing, the lower the mark of the studied interval is determined by the volume displaced from an underground reservoir brine and the pressure values of the test fluid and brine, measured at the wellhead during aging underground reservoir under pressure, the imposition of the test pressure carried out in stages by increasing it in the following sequence: 0,5 PCOI, 0.75, and RCOI, RCOIwhere RCOI - test pressure, with a gradual shutter speed underground reservoir in time under specified pressures to equalize the temperature of the background of the injected test fluid, brine and containing underground reservoir rocks, determination of the rate of pressure drop is produced at every stage of the aging underground reservoir in time under imposed pressure, and the magnitude and intensity of leakage within the allocated interval test set average value volume datacaching test fluid during the period of phased applying pressure to the value of the test.

In the present drawing shows a diagram of leak testing an underground reservoir, created in soluble rocks through the borehole.

The diagram shows the underground tank, consisting of production-capacity 1, created in soluble rocks through the borehole 2, equipped with a casing 3 and a suspension of 4 columns of tubes. Production capacity 1 is filled with brine.

For carrying out the envisaged determining the tightness of underground storage tank selected test intervals I, II, III, IV. The first interval test I is from the wellhead 2 to its lower level, under the ground level. The second interval test II is from the wellhead 2 to sulfur the ins length of the casing pipe 3. The third interval test III is from the wellhead 2 to its lower level, located above the Shoe of the casing pipe 3. The study of intervals I-III set the degree of tightness of the casing pipe 3 technological hole 2. The length of the fourth interval test IV is located from the mouth of the technological hole 2 to its lower level, under the Shoe of the casing pipe 3. The study interval IV establish the degree of tightness of production-capacity 1 underground reservoir.

Hanging column pipe 4 technological hole 2 tied with pump 5 cementing unit 6 and the measuring tank 7.

Back to the wellhead 2 summed line pipe 8 for supplying brine with the attached pressure gauge 9, thermometer 10 and the valves 11, 12.

Line pipe 13 serves to supply the test fluid, it tied with the annular space outboard 4 and casing 3 columns of tubes. On line 13 set 14 gauge, thermometer 15, the flow meter 16 and valves 17, 18.

Measuring tank 7 of the pipe is connected to the tubing line 8 and rasolofosaon 19, provided with a valve 20.

The method is as follows.

Before testing the tightness of underground storage tank filled with brine in with vagina 2, equipped with casing pipe 3, the lower outboard 4 column pipes. Shoe this column is placed under the Shoe of the casing pipe 3 and produce test intervals I, II, III, IV leak located within the wellhead 2 to roof framing-the tank 1. According to the results of serial studies on the tightness of the selected test intervals I, II, III, IV assess the technical condition of the underground tank.

Before testing the first interval I suspended a string of pipe 4 technological hole 2 tied with pump 5 cementing unit 6 and the measuring tank 7. On line 8, provided with valves 11 and 12, install the pressure gauge 9 and thermometer 10.

Annulus suspended 4 and casing 3 columns tubes tied with a pipe 13 for supplying the test fluid. On line 13, provided with valves 17 and 18, set 14 gauge, thermometer 15 and the flow meter 16.

With open valves 17 and 18 through the pipe 13 into the tube space of the casing 3 and outboard 4 columns of tubes pumped the test fluid before reaching the boundary of the section "testing the fluid - brine" bottom mark interval tests I and measure the volume of the injected test fluid flow meter 16. Concurrently, the suspension string of pipe 4 to the pipe 8 at the open gate valves 11 and 12 of underground production-capacity 1 displace on the surface of the brine, measuring its volume in a measuring tank 7 and transferring at an open gate valve 20 in rasoolabad 19.

The lower interval marker tests I underground reservoir initially determined by the volume of brine displaced in the measuring tanks 7, hoping her by the formula (1)

where N is the lower interval marker test I, m;

Vð- the volume of the displaced brine, m;

R is the internal radius of the casing pipe, m;

r is the external radius of the suspended pipe string, m;

After that, when closed valves 11 and 12 on the pipe 8 start gradual increase in pressure in the annular space outboard 4 and casing 3 columns of tubes. The imposition of pressure within the interval tests I carried out in stages, by increasing the pressure in the following sequence: 0,5 PCOI, 0.75, and RCOI, RCOIwhere RCOI- test pressure.

At the first stage of testing the tightness of the interval I of an underground reservoir pressure in the annular space outboard 4 and casing 3 columns of tubes to raise the level of 0.5 RCOI, can withstand the borehole 2 in time to equalize the temperature of the background of the test fluid, brine and containing underground reservoir rocks, with leave of the test system at the time of exposure to pressure with closed valves on l is at 8, 13 and 19 with periodic measurements of the pressure gauge 9 and the measured temperature of thermometer 10 to the wellhead 2.

The established position of the boundary line "test fluid is brine" on the lower elevation interval tests I also controlled by the pressure values of the test fluid and brine, measured at the wellhead 2 in the cooling-off period imposed under pressure, based on the expression (2):

where ĐÈÔthe pressure of the test fluid at the wellhead, PA;

Ðð- the brine pressure at the wellhead, PA;

ρðthe density of the brine, kg/m3;

ρÈÔthe density of the test fluid, kg/m3;

g - free fall acceleration, m/s2.

The amount of leakage in the studied interval set by the rate of pressure drop in the annular space of the borehole 2 at the time of the underground reservoir under the intermediate pressure of 0.5 RCOI. Thus leakage of the test fluid during the exposure interval testing I determined by measuring the volume datacaching annulus of the test fluid through the flow meter 16 with the imposition of intermediate pressure.

After exposure of the underground reservoir under the intermediate test pressure equal to 0.5 PCOIduring not less than the 1 hour open valve 17, 18 on lines 13 and proceed to the download resume function test fluid in the annulus of the casing 3 and outboard 4 columns of tubes with bringing pressure at the wellhead 2 sequentially until a residual pressure is 0.75 PCOIand then RCOIsequence of operations similar to that described for the first stage of the test interval I. after exposure time on the last (third) stage of the test interval, I pressure, double-raise to the level of the test, and the well 2 again stand under test pressure.

The time interval of the test I underground reservoir under an intermediate pressure of 0.5 RCOIand 0.75 PCOImust be at least 1 hour for each of these pressures. After applying the test pressure (PCOIin the interval tests I extract this pressure is not less than 24 hours.

The leakage rate interval testing I determined by the average value of the volumes datacaching fluid at each of these stages overlap pressure.

If a leak is detected in the interval test I it is divided into 2 equal potential. To do this, after the exposure time of the system under test pressure opening valves 11 and 12 and produces the injection of the brine in the suspension string of pipe 4 leading to the border once the ate testing fluid brine" from the bottom up to the middle mark interval test I. this excessive number of test fluid from the annulus release opening valves 17 and 18. Testing for leaks in these putinterval carried out as described above.

If a leak is detected in pointervalue test his share to the other 2 are equal in magnitude of potential to locate the actual location of the leak.

After testing interval I begin similar research testing intervals II, III and IV as shown in the diagram.

The time interval IV under the intermediate test pressure of 0.5 RCOIand 0.75 PCOIis not less than 12 hours, and after twice raising the pressure in the test interval IV to a value of PCOIshutter speed is not less than 72 hours.

The tightness of underground tank judged by the rate of pressure drop in accordance with the normative documents [4, 5], which allows to establish that the underground tank may be declared tight when the hourly rate of pressure drop over the last 12 hours of endurance underground reservoir under pressure does not exceed 0.05% of the value of the test pressure and the permissible leakage is not more than 20 l/day for the Jew who CSOs test fluid and 50 kg/day for gas.

Example 1

Testing for tightness of the underground reservoir No.1 to the formulation of a capacity of 1, created in soluble rocks through the borehole 2, schematically represented in the drawing. The Shoe of the casing pipe 3 set at a depth of 1000 m Diameter casing pipe 3 is 299 mm Diameter of the suspended pipe string 4 is equal to 219 mm Shoe this column pipes are installed under the Shoe of the casing 3 at the level of 1003 m Hanging a string of pipe 4 technological hole 2 tied with pump 5 cementing unit 6 and the measuring tank 7. On line 8, provided with valves 11 and 12, install the pressure gauge 9 and thermometer 10. Annulus suspended 4 and casing 3 columns tubes tied with a pipe 13 for supplying the test fluid. On line 13, provided with valves 17 and 18, set 14 gauge, thermometer 15 and the flow meter 16.

As a test fluid using natural gas. Allocate intervals trials I, II, III, IV leak underground reservoir No. 1.

Test borehole 2 and underground excavations-capacity 1 underground reservoir No. 1 produced by the injection interval of the test fluid with a phased sequential overlay test pressure in the selected interval is x test I, II, III, IV.

Research first interval tests I leak located from the mouth of the borehole 2 to its lower level, carried out by injection of natural gas through pipeline 13 at open gate valves 17, 18 in the annulus of the casing 3 and outboard 4 columns of pipes before reaching the boundary of the section "gas - brine" bottom mark interval test I with simultaneous displacement of brine from underground excavations-the tank 1 by hanging the string of pipe 4 at open gate valves 11 and 12 in pipeline 8 by measuring in a measuring tank 7 number of displaced brine, amounting to 1 m3, and the subsequent pumping of displaced brine at an open gate valve 20 in rasoolabad 19.

After that, the valves 11, 12 on lines 8 and valves 17, 18 on the line of the pipe 13 is closed, and the gas pressure at the wellhead 2 gradually raise: first, to 0.5 PCOIequal to 6.3 MPa, then to 0.75 PCOIequal to 9.4 MPa, and then up to RCOIamounting to 12.5 MPa.

At each stage of testing underground tank leak position of the boundary between the gas - brine" is determined by the volume of displaced brine by the formula (1)and formula (2) considering the magnitude of the pressure of the test fluid and brine, measured at the wellhead 2 during the exposure of the underground reservoir No. 1 is od pressure.

Excerpt wells 2 to stabilize the heat transfer test fluid with brine and rock mass containing underground reservoir No. 1, each phase of the study interval tests I conduct after closing all valves in pipe lines 8, 13, 19. Then leave the system at the time of exposure to pressure with periodic measurements of pressure and temperature at the wellhead 2. Make download resume function of fluid to establish the value of the test pressure. And the leakage rate of the studied interval I is determined by the average value of the volumes datacaching fluid at each of these stages overlap pressure.

At the time the wellhead 2 for 1 hour under pressure: beginning at 0.5 PCOI=6.3 MPa; 0,75 PCOI=9,4 MPa, then for 24 hours at PCOI=12,5 MPa pressure drop in the system was not observed, therefore, leakage of the test fluid absent, which allows to make a conclusion about the full integrity of the interval test I.

Research on the tightness of the second interval test II, located from the mouth of the well 2 to the middle of the length of the casing pipe 3, is carried out by injection of natural gas in the annulus of the casing 3 and outboard 4 columns of tubes to the bottom mark interval II with simultaneous displacement of brine by podvin the th column of pipes 4 with open valves 11, 12 on the line of the pipeline 8. In the result, the volume of displaced brine was 16 m3. Then the valve 11, 12 is closed, and the gas pressure at the wellhead 2 gradually raise: 0.5 PCOI=6.3 MPa; 0,75 PCOI=9,4 MPa; PCOI=12,5 MPa in sequential extracts of the system under a phased pressures to equalize the temperature of the background.

At the time the wells for 1 hour under a gradual pressure: 0,5 PCOI=6.3 MPa; 0,75 PCOI=to 9.4 MPa and within 24 hours at PCOI=12,5 MPa pressure drop was observed. The study interval test II is recognized as sealed.

The study of the third interval test III produced by injection of natural gas through pipeline 13 at open gate valves 17, 18 in the annulus of the casing 3 and outboard 4 columns of tube wells 2 before reaching the boundary of the section "gas - brine" bottom mark interval test III, located above the Shoe of the casing pipe 3. During the gas injection simultaneously displace brine from underground excavations-the tank 1 by hanging the string of pipe 4 in-line pipe 8 with open valves 11 and 12 by measuring in a measuring tank 7 volume displaced brine, which amounted to 32.7 m3. After that, the valves 11, 12 on lines 8 and valves 17, 18 on the line of the pipe 13 is closed, and the pressure g is for wellhead 2 gradually raise: first, until a residual pressure of 0.5 R COIequal to 6.3 MPa, then to 0.75 PCOIequal to 9.4 MPa, and RCOIamounting to 12.5 MPa.

During sequential exposure of wells 2 for 1 hour under a pressure of 6.3 MPa and 9.4 MPa, and within 24 hours under a pressure of 12.5 MPa pressure drop in the system was not observed. Interval III tests of underground tank sealed recognized.

The study of the fourth interval test IV, covering the upper part of the output, capacity 1 and PrivatMoney zone of the casing pipe 3, produced by injection of natural gas in the tube space of the columns of tubes 3 and 4 before reaching the boundary of the section "gas - brine" bottom mark interval test IV, below the Shoe of the casing pipe 3. The same output capacity 1 displace the brine by hanging the string of pipe 4 in-line pipe 8 with open valves 11, 12 with the measurement of its volume measuring tanks 7. During the injection of natural gas displaced 60 m3the brine. After the injection of natural gas close valves 11, 12 on lines 8 and 17, 18, lines 13. After that, the gas pressure at the wellhead gradually raise: first, until a residual pressure of 0.5 RCOI=6.3 MPa, then to 0.75 PCOI=to 9.4 MPa and PCOI=12,5 MPa at the relevant extracts of the system under specified pressure is about leveling the temperature of the background.

While the shutter output capacitance 1 for 12 hours under a pressure of 6.3 MPa, then to 9.4 MPa and within 72 hours after twice raising the pressure in the range of test IV to 12.5 MPa was observed pressure drop. The magnitude of the rate of pressure drop, measured at the wellhead 2, in the study of interval IV trials are presented in table 1.

Table 1
Changing the pressure of natural gas at the wellhead 2 in the study on the tightness of the underground reservoir No. 1.
Pressure, MPaThe rate of pressure drop, MPa/h
12 hours endurance
6,30,002
9,40,003
72 hours exposure
12,50,003

The tightness of underground production-capacity 1 estimate on the rate of pressure drop in accordance with the applicable normative documents [5, 6], according to which the underground reservoir No. 1 became sealed, as the hourly rate of pressure drop over the last 12 hours vyd is Riki underground reservoir No. 1 under pressure did not exceed 0.05% of the test pressure (0,006 MPa).

During the performed tests, the average intensity of the leakage of natural gas, is taken as the test fluid was 40 kg/day, less than the allowable amount of leakage of gaseous fluid, equal to 50 kg/day. On the basis of data obtained underground reservoir No. 1 became tight.

Example 2

Testing for leaks underground reservoir No. 2, created in rock salt through the borehole 2 with the formation of production-the tank 1 is also shown in the drawing. Set for his research on the tightness of the equipment and the sequence of operations similar to that described in example 1. The test results are output, the container 1 under the intermediate pressure of 6.3 and 9.4 MPa for 12 hours and under a test pressure of 12.5 MPa for 72 hours are presented in table 2.

Table 2
The change in pressure of the test fluid at the wellhead 2 in the study on the tightness of the underground reservoir No. 2.
Pressure, MPaThe rate of pressure drop, MPa/h
12 hours endurance
6,3 0,002
9,40,006
72 hours exposure
12,50,008

The tightness of underground storage tank judged by the rate of pressure drop. In accordance with the normative documents [4, 5], if the hourly rate of pressure drop within the last 12 hours of exposure under test pressure exceeds the permissible value of the pressure drop (0,0063 MPa), the underground tank is leaking. The average leakage rate of the test fluid during the tests was 80 kg/day, which is higher than the permissible limits. Based on the data, the underground reservoir No. 2 acknowledged leaking.

Sources of information

1. Interim guidance on the design and construction of underground repositories in deposits of rock salt SN-320-65. M., 1965, p.31.

2. USSR author's certificate No. 969892, IPC EV 43/28,1981.

3. USSR author's certificate No. 1440821, IPC 65G 5/00, EV 47/10, 1988.

4. JV 34-106-98. Underground storage of gas, oil and products of their processing. The official publication. OAO "Gazprom". M.: 1998

5. STO Gazprom EP 1.9-095-2004. Instructions for testing the tightness of underground storage tanks in rock salt. The official publication. OAO "Gazprom". M.: 2004

The method of testing g is reticent underground reservoir, created in soluble rocks through the borehole, providing for the installation of an underground tank, filled with brine, casing and hanging columns of tubes, the allocation interval test interval the injection of the test fluid in the annulus of the casing and hanging columns of pipes before reaching the boundary of the section "testing the fluid - brine" bottom mark interval tests with simultaneous displacement of brine on the surface, the imposition of the test pressure and the exposure time of each frame of the test under the test pressure with the determination of the rate of pressure drop, repeated application of the test pressure with download resume function test fluid, determining the size and intensity of the leak rate pressure drop and volume datacaching test fluid, characterized in that before applying the test pressure Shoe hanging the tubing placed under the Shoe of the casing, the lower the mark of the studied interval is determined by the volume displaced from an underground reservoir brine and the pressure values of the test fluid and brine, measured at the wellhead during aging underground reservoir under pressure, the imposition of the test pressure carried out in stages by increasing e is on in the following sequence: 0,5 P COI, 0.75, and RCOI, RCOIwhere RCOI- test pressure with a gradual shutter speed underground reservoir in time under specified pressures to equalize the temperature of the background of the injected test fluid, brine and containing underground reservoir rocks, determination of the rate of pressure drop is produced at every stage of the aging underground reservoir in time under imposed pressure, and leakage rate within the allocated interval test set average value volume datacaching test fluid during the period of phased applying pressure to the value of the test.



 

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3 cl, 6 dwg, 1 tbl

FIELD: construction.

SUBSTANCE: storage is arranged below earth level (1), is enclosed along the perimetre from the soil massif with a concrete wall of "wall in soil" type (2) and comprises a reinforced concrete reservoir (5) arranged on the base from compacted soil (3) and a heat insulation layer (4), and this reservoir at its external side surface is surrounded with a pliable layer (6) and is coated from inside with layers of heat insulation (7) and hydraulic insulation (8). The storage is equipped with a process well that exits the reinforced concrete reservoir to earth surface. On the concrete wall of the "wall in soil" type there is a support reinforced concrete ring (14), where guy ropes (15) coated with anticorrosion material are attached to support the roof of the reinforced concrete reservoir. At the external side of the concrete wall of "wall in soil" type from the level of the reinforced concrete reservoir roof to earth surface there is a conical or stepped mine filled with a layer of light heat insulation material (13) together with the roof of the reinforced concrete reservoir, guy ropes, support reinforced concrete ring.

EFFECT: possibility of increased capacity storages construction.

3 cl, 2 dwg

FIELD: construction.

SUBSTANCE: storage is arranged below earth level (1) at the elevation that prevents freezing of the earth surface during the longest possible storage of gas. The storage is enclosed along the perimetre from the soil massif with a concrete wall of "wall in soil" type (2) and comprises a reinforced concrete reservoir (5) arranged on the base from compacted soil (3) and a heat insulation layer (4), and this reservoir at its external side surface is surrounded with a pliable layer (6) and is coated from inside with layers of heat insulation (7) and hydraulic insulation (8). The storage is equipped with a process well that exits the reinforced concrete reservoir to earth surface. On the concrete wall of the "wall in soil" type above the roof of the reinforced concrete reservoir below earth surface there is a support reinforced concrete ring (14), where guy ropes (15) coated with anticorrosion material are attached to support the roof of the reinforced concrete reservoir. The upper of the reinforced concrete reservoir roof, guy ropes and the support reinforced concrete ring to soil surface are filled with a layer of light heat insulation material.

EFFECT: possibility of increased capacity storages construction.

1 dwg

FIELD: transport.

SUBSTANCE: transporter comprises pipeline provided with at least inlets with front and rear shutters to stop openings in initial positions. Front rotary shutter is provided with spring-loaded lever with weight to displace relative to said lever and be locked thereon in definite position. Weight is arranged to adjust moment of forces acting at shutter by weight spring and adjusting screw designed to vary weight position and spring tension.

EFFECT: air speed increase at pipeline bottom, lower costs, better operation.

2 dwg

FIELD: transport.

SUBSTANCE: transporter comprises pipeline provided with at least inlets with front and rear shutters to stop openings in initial positions. Front rotary shutter is provided with spring-loaded lever with weight to displace relative to said lever and be locked thereon in definite position. Weight is arranged to adjust moment of forces acting at shutter by weight spring and adjusting screw designed to vary weight position and spring tension.

EFFECT: air speed increase at pipeline bottom, lower costs, better operation.

2 dwg

FIELD: mining.

SUBSTANCE: method involves drilling of wells to the depth of 3-5 km; some of them shall be inclined and shall converge at the depth of 3-5 km approximately to one point and shall be used as inlet ones. At that, inclination angle of those wells is chosen so that possibility of spontaneous explosion can be eliminated. Casing of sections of shafts of those wells is performed with casing pipes; squibs and main charges are supplied to them. At that, round charges from explosive in covers are used as squibs and main charges and alternate with explosion initiators, as well as radio electronic devices for receiving destroy signal. Liquid explosives are supplied to wells simultaneously with charges. Destroy signal is supplied by means of radio electronic device. Boundaries of the formed underground cavity is determined after explosion by means of seismic pickups and two inclined diverging wells are drilled approximately from one point towards its edges for its further purposeful use.

EFFECT: lower labour intensity of cavity formation.

1 dwg

FIELD: transport, package.

SUBSTANCE: invention relates to waste burial and may be used for extraction of industrial wastes from underground mine working. For this, water feed pipe is perforated over its entire length for elastic closed envelopment to be secured thereon. Water- and brine-feed pipes are fitted into hole. Brine-feed pipe bottom face is arranged at chamber bottom. Brine or other fluid is forced in clearance between said two pipes to displace wastes in brine-lift pipe in volume sufficient to displace wastes from underground chamber and said clearance. Volume of elastic closed envelopment is taken to exceed designed volume of chamber.

EFFECT: expanded applications, higher safety and efficiency.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to an underground gas storage and is designed to determine impact of various natural-anthropogenic geodynamic processes at safety of an underground gas storage (UGS). The method includes development of a geodynamic polygon and execution of a comprehensive geodynamic monitoring (CGDM) on it, building a map following the CGDM results and forecasting emergency geodynamic events. The comprehensive geodynamic monitoring is executed both at regional and local stages in monitoring units - aerospace, deformation, geophysical, hydrogeological and fluid-dynamic ones, with application of various space and time detail of measurements. At the regional stage, site research is carried out within the geodynamic polygon in monitoring units - aerospace, deformation, geophysical ones. At the local stage of CGDM, well studies are carried out in monitoring units - hydrogeological, fluid-dynamic and geophysical ones. A refined geodynamic model is created. Classification of criterial indices is developed for each monitoring unit to assess a geodynamic risk, to assign a five-point grading at the regional stage, a three-point grading at the local stage, according to the level of the geodynamic danger. Indices calculated for each monitoring unit are compared with criterial indices, intensity of hazardous geodynamic and anthropogenic-induced processes expression is assessed in all monitoring units, then a single total coefficient of UGS geodynamic condition is calculated using the formula. It is compared with a previously calculated criterial coefficient for each level of geodynamic hazard, a level of geodynamic hazard of UGS is defined, and a final map of area ranging according to extent of geodynamic risk is built.

EFFECT: improved reliability and safety of UGS operation.

3 dwg, 4 tbl

FIELD: transport.

SUBSTANCE: tabular element (2) is fed using transport device (3) to the section of thrusting rib (7) and moved towards pallet. The front rib (6) of pallet (6) at certain moment begins to move against direction of tabular element transportation. Simultaneously, the holding rib (8) prevents the tabular element to follow this movement. The rear rib (5) of the pallet moves in direction opposite to direction of the first rib movement. Holding facility (8) moves vertically down. The tabular element passes through the pallet when it is released under gravity force action and falls into receiving position. The moving rib and the holding rib have comb-type elements engaging with each other. The device has central lubrication device adjustable on the basis of data processing. For each control process permitted time deviation is specified. Keeping to this deviation is controlled, and when permitted limits are exceeded alarm signal is generated.

EFFECT: quick, reliable and not requiring additional storage areas plate stacking is provided.

3 cl, 9 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes performing a test pumping of liquid waste into absorbing well before operational pumping, while changing flow step-by-step. From equation of absorption base hydrodynamic parameters are determined for calculation of predicted coefficients of operation characteristics of absorbing well and reserve well. During operational pumping of liquid waste together with thermometry along absorbing well shaft, registration of actual pressures and flow on pump devices, actual pressures on mouth in tubing pipes of absorbing well, actual pressures on face are additionally registered in absorbing well as well as pressures on mouth in behind-pipe space, actual loss at mouth in behind-pipe space, actual loss of waste on mouth, actual positions of face well, upper and lower limits of absorption range from well mouth. In reserve well actual pressures on face are registered, as well as actual positions of liquid level from reserve well mouth, upper and lower limits of absorption range. Prediction coefficients are compared for operation characteristics of absorbing well and reserve well to actual coefficients. 9 conditions of hydrodynamic bed conditions at reserve well and absorbing well are considered during pumping of waste. Specific actions of operator on each condition are described.

EFFECT: higher reliability and trustworthiness.

1 ex

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