Device for hydraulic rupture of beds

FIELD: mining.

SUBSTANCE: device comprises geophysical cable, facility of transportation, connected to hydraulic rupture facility. According to invention, transportation facility is arranged in the form of hydraulic propeller connected by common shaft to drive and high-voltage generator, installed inside closed sealed vessel. This vessel is in its turn installed inside jacket with formation of circular gap. At the same time high-voltage generator is arranged with piezoelectric plates.

EFFECT: improved efficiency of hydraulic rupture by increasing efficiency of perforation facility delivery, intended for hydraulic rupture of beds into horizontal or inclined well.

13 dwg

 

The invention relates to the mining industry, namely to the oil and gas industry.

A device for the delivery of logging tools into the well on a Russian patent for invention №2054539 containing wireline and means of delivery in the form of additional goods, made with the possibility of stringing on the logging cable. At the ends of the sections and clamps are made with locking elements.

The disadvantage is that the total length of all sections of additional cargo must be greater than the horizontal length of the well. For wells having horizontal section of the great length of this device is not applicable due to the large complexity of manual work, great weight and the possibility of breakage of the geophysical cable.

A device for the delivery of logging tools in horizontal wells by RF patent for the invention №2138613, which contains the logging cable and a delivery vehicle in the form of a segment of cable with enhanced stiffness and increased in diameter, installed between the logging cable and a geophysical instrument. This segment of the cable simultaneously performs the role of goods and means of delivery due to the large diameter and high rigidity. In addition, we recommend that you create in mouth high blood pressure 6...7 MPa.

A device for hydrometry is and layers by RF patent No. 2260115, containing sectional pyrotherapy, electronic power supply and a composite rod. This provides a reduction in accident rates, reducing the impact of temperatures on the logging cable, providing output well in normal mode after processing by preventing clogging of the pump mechanical impurities, asphaltenes at the start of the production enhancement reservoir. The inventive method includes deep perforations on all intervals of the processed layer, Assembly, sectional charge with a Central channel through which pass the details of the snap. Down the charge in the hole and burn it section, made of compounds, which provides burning in water, water-oil and acid environment with formation of combustion products. Increase the pressure and temperature in the well. Control of combustion sections of charge in real time with fast combustion processes. Register specifications operation mode of the charge. The nature of changes in these characteristics are judged on the nature of the stimulation and the reaction of the bottom hole zone of influence. For Assembly of the battery using the composite rod made of material so as to maintain integrity when exposed to mechanical and thermal loads during descent-the rise of the charge and its combustion. Composite rod with a hollow channel, passing inside the rod along its Central axis for the passage of wires power supply node ignition and wires with heat-resistant insulation, connecting the wireline to the electronic control unit and reception characteristics of the mode of charge. This unit is attached to the lower part of the lower rod and come from sections of the charge at this distance, so that hot products of combustion of the charge had no direct impact on it. In addition, to reduce the load on the rod and provide maximum directional effect on the treated layer between the lower section of the charge and the electronic unit has a diffuser of a gas stream. The inner cavity of charge to the entire height of the construction fill of the surface-active substance to provide additional depression on the formation and removal of mechanical impurities in the foaming surface-active substances during combustion of the charge. Perforations on all intervals of the processed layer is carried out by the perforator with the phasing 30-45° with the formation of the post-combustion of the charge vertically-inclined spiral fractures around the borehole in the critical zone, which is not closed during subsequent fracturing and provide the hydrodynamic coupling of the well layer. When assembling the charge to save the whole the particular design and reduce the impact of temperatures on the logging cable at the combustion charge use extended up to 2.0-2.5 m in the upper and elongated to 1.0-1.5 m lower rod, attached to both ends of the bearing portion of the rod.

The disadvantage of this device is that the descent of the means of perforations in a horizontal well or a well with a slope of 5...7 deg. very difficult, in addition, close.

The objective of the invention is the provision of delivery means of perforations intended for hydraulic fracturing, horizontal or inclined well and improve the effectiveness of hydraulic fracturing.

The solution of the stated problem is achieved in the device for hydraulic fracturing, containing geophysical cable, means of transportation, coupled with by means of hydraulic fracturing, the fact that the means of transport made in the form of hydraulic thruster connected to a common shaft with a drive and a high voltage generator placed inside a closed sealed enclosure that is installed, in turn, inside the casing, with the formation of the annular gap, with the high-voltage generator is made with piezoelectric plates, and a common shaft has a disk with rollers, the latter of which are able to exert pressure on the piezoelectric plate when the rotation of the common shaft from the drive.

The invention is illustrated in figure 1...13 where:

figure 1 shows a diagram of the delivery means of hydraulic fracturing and high voltage generator in the hole,

the piano is D.2 provides a means of fracturing tool delivery, the first option

figure 3 shows a second variant of the device

figure 4 shows a third variant of the device

figure 5 shows a fourth variant of the device

figure 6 and 7 shows the first variant of the connection means of delivery and means of hydraulic fracturing,

on Fig and 9 show a second variant of the connection means of delivery and means of hydraulic fracturing,

figure 10 shows the design of the generator high-voltage

figure 11 shows a fragment means of hydraulic fracturing,

on Fig shows the design of the roller,

on Fig the design of the compensator pressure and thermal expansion.

The device (1...13) is designed to run in hole 1 means frac 2 and implementation of hydraulic fracturing for enhanced recovery of oil. The device (1) contains surface and downhole equipment. Ground equipment includes remote control 3, the computer 4 monitor 5 connected to the power source 6. With the control unit 3 connected to the logging cable 7 is wound on the spool 8. Logging cable 7 or the coil 8 is in contact roller 9 of the device for measuring the length of the cable 10.

Downhole apparatus includes a tool frac 2 and a delivery vehicle 11 that is installed in a closed sealed housing 12. The device has at one end a cable lug 3, connected to the logging cable 7. Between the pyrotechnic means 2 and the delivery vehicle 11 is made docking station 14 for tight mechanical and electrical connection means frac 2 with the delivery vehicle 11.

The delivery vehicle 11 includes drive 15 (mostly this can be an electric motor) and hydraulic mover 16 in the form of one or two screws 17 and 18. Scheme with two propellers 17 and 18 has the advantage compared with the scheme, with one propeller, as there is no reactive torque causing rotation of the delivery means 11 and to the twisting of the logging cable 7. The screws 17 and 18 can be set either in one plane or aligned.

Tight closed housing 12 is installed on the ribs 19 in the casing 20 with the formation of the annular gap. The casing 20 is made open at both ends and contains before propellers 17 and 18 of the conical inlet part 21 with holes "G". The input end of the tapered part 21 and holes "G" closed filters 22 to prevent contact with propellers 17 and 18 foreign particles of large size, which can lead to blockages. Between the propellers 17 and 18 and the actuator 15 is set conversion mechanism 23 for converting rotation of one drive shaft 15 during the rotation of the two shafts 24 and 25. Inside hermet knogo closed housing 12 is set to a high voltage generator 26.

The fracturing tool 2 (2 and 11) comprises a sealed cylindrical housing 27, in which radially mounted in the insulator electrodes 28 29 connected to the wire 30 from the docking station 14, which, in turn, connected to high voltage wires 31 from the high voltage generator 26 connected to the actuator 15.

Docking station 14 is located between the delivery vehicle 11 and the fracturing tool 2 (Fig 3 and 4). Docking station 14 may include two joined parts 32 and 33 and provides electricity transmission and rotate for 5...10 degrees for the passage section of the well with a radius curvature. The first abutting portion 32 attached to the end of the conical section 21, the second abutting portion 33 attached to the end of the airtight cylindrical body 27 tools frac 2 if the fracturing tool is in front of the delivery vehicle 11 (2, 4).

There are several variants means of delivery 11.

Figure 2 and 4 show the option to install a delivery means 11 after 2 frac 2 (in the direction of movement in the borehole), i.e. a delivery vehicle 11 is made with a pusher propeller screws 17 and 18. Two of the propeller 17 and 18 mounted in the casing 20 and have the possibility of rotation in opposite directions by applying a transformation mechanism 23. As a mechanism for change is adowanie 23 you can use a reducer or multiplier.

The fracturing tool 2 (3-5 and 11) can be installed after delivery means 11 (in the direction of movement to slaughter). In this case, the cable tip 13 is made on the end of cylindrical body 27 tools fracturing 2. The fracturing tool 2 has a cylindrical housing 27, in which the insulators 28 are mounted the electrodes 29 and 30, which are connected to high voltage wires 31 (11). Docking is connecting parts 32 and 33.

The conversion mechanism 23 (Fig.6-7) contains mounted on the control shaft 34 and pinion gear 35. In mesh with the pinion 35 is the first intermediate gear 36, mounted on the first driven shaft 24. The second intermediate gear 37 mounted on the same shaft and is engaged with the driven gear 38 mounted on the shaft 25. This provides the opposite rotation of the propellers 17 and 18 and prevent rotation of the casing 21 and tightening the logging cable 7.

The second variant of the conversion mechanism and hydraulic thruster is shown in Fig and 9. Propellers 17 and 18 mounted coaxially on the driven shafts 24 and 25, are made concentric, while the driven shaft 24 passes inside the driven shaft 25. The most preferred execution of the transfer mechanism is the use of a reducer or multiplier in the form of the epicycle gear IU is anima, for example, the differential planetary gear unit. In this embodiment, the conversion mechanism 23 includes (Fig) mounted on the control shaft 34 of the Central wheel 39, the sun wheel 40 and satellites 41, mounted on the drive rod 42.

The high-voltage generator 26 (figure 10) installed in a common housing and includes a protective housing 43, the rotor 44. Protective housing 43 has a rear (lower) part of the electrical connector 45 is connected to the inner wire 46 from a device to convert mechanical energy into electrical energy 47. Device for converting mechanical energy into electrical energy 8 includes a piezoelectric plate 48 and at least one deformation mechanism 49, the number of which corresponds to the number of the piezoelectric plates 48 connected through a common shaft 50 by the actuator 15.

Each deformation mechanism 49 is made in the form of a disk 51 mounted on a common shaft 50 and having both sides mounted on the axis (axes) 52 rollers 53. The rollers 53 mounted on the axis 52 with a radial clearance δ (Fig) and moved within this gap under the action of atropine forces R. Between the rollers 53 and piezoelectric plates 48 are installed flexible insulating strip 54 (figure 10). The common shaft 50 mounted in bearings 55 and 56. The bearings 55 and 56 are sealed by seals 57 and 58 closed or completed. All detail the high-voltage generator 26 is installed in the cavity 59, which is airtight and filled with inert gas. The actuator 15, the high-voltage generator 26 and the conversion mechanism 23 can be equipped with a common unit of pressure compensation and temperature expansion 60 (Fig)t or each his own. Housing 1 has holes 61 for the high-voltage wires 46. The design of the compensator pressure and thermal expansion 60 shown in Fig, it contains the piston 62, the cavity 63 under the piston 62 hole 64 is connected to the cavity 63 and the cavity 65 above the piston 62 is connected by the bore 66 with the environment. The piston 62 is biased by spring 67.

The operation of the device (1...13).

In the well 1 drop on the logging cable 7 pyrotechnic device 2 and the delivery device 11, United docking station 14. Vertical part of the well 1, the device is held under the action of gravity, while logging cable 7 is unwound from the reel 8 and the sensor cable length 10 determines the depth to which lowered the device, and passes this information to the computer 4. In the horizontal section of the well or on land having a slope less than 5...7 degrees, move the device without extraneous forces is impossible. So from the control panel 3 includes a power supply through logging cable 7 to the actuator 15, which spins the propellers 17 and 18 Hydra is symbolic of the propulsion unit 16. Propellers 17 and 18 rotate in opposite directions by applying a transformation mechanism 23. Due to counter-rotating propellers 17 and 18, the casing 20 is not operating torque, and it is not rotating, and the logging cable 7 is not twisted.

The flush fluid propellers 17 and 18 is discarded through the annular clearance In the direction opposite to the slaughter. This creates a reactive force that moves the delivery vehicle 11 forward, it, in turn, moves the pyrotechnic means 2. Information about the location of the device in the borehole is determined by the device for measuring the length of the cable 10 and is passed through logging cable 7 to the computer 4 and the monitor 5. When the desired depth is the signal transmitted from the remote control 3 through logging cable 7 further through the cable lug 13 on the high voltage wires 31 to the electrodes 29 and 30, between which passes the spark.

Power high voltage electrode 29 is provided a high voltage generator 26. The high-voltage generator 26 is driven in rotation by the actuator 15 through the common shaft 50 which rotates with the rotor 44. During the rotation of the common shaft 50 causes the rotation of the disk 51 with the axes 52 and rollers 53. The rollers 53 are putting pressure on the piezoelectric plate 48 (Fig) due to centrifugal forces R, in which there is a high voltage, which the inner wire 46 is transmitted to the electrical connector 45 and then to the high-voltage wires 30 and 31 to the electrodes 29, between which there is a discharge that causes water hammer in the borehole 1 and hydraulic fracturing.

The compensator pressure and thermal expansion of 60 (figure 10 and 13) compensates for the change in the flow rate of lubricant in the cavity 59 for any reason: leakage, changes in pressure or temperature.

Management of all processes performed by the computer 4.

Application of the proposed technical solutions allowed:

1. to ensure the delivery means of perforated seams in horizontal section of the well to a certain depth and high voltage electrical discharges;

2. to ensure the safety of personnel through the application of the high voltage source at a considerable depth in the pit and control them using a computer having a small voltage on ports;

3. to prevent twisting of the geophysical cable and rotation of the pyrotechnic device through the use of two propellers rotating in the opposite direction.

Device for hydraulic fracturing, containing geophysical cable, means of transportation, coupled with by means of hydraulic fracturing, characterized in that the means of transport made in the ideal hydraulic thruster, connected to a common shaft with a drive and a high voltage generator placed inside a closed sealed enclosure that is installed, in turn, inside the casing with the formation of the annular gap, with the high-voltage generator is made with piezoelectric plates, and a common shaft has a disk with rollers, the latter of which are able to exert pressure on the piezoelectric plate when the rotation of the common shaft of the actuator.



 

Same patents:

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FIELD: mining.

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67 cl, 4 dwg

FIELD: oil and gas industry.

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4 cl, 7 dwg

FIELD: oil and gas industry.

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31 cl, 8 dwg

FIELD: mining.

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34 cl, 1 ex, 1 tbl

FIELD: mining.

SUBSTANCE: method includes pumping of hydraulic rupture liquid, containing proppant particles, through well into crack developed in underground bed. According to invention, in process of pumping turbulent mode of fluid flowing is provided in crack by means of hydraulic rupture pumping with viscosity of less than 0.01 Pa·s with pumping speed of at least 8 m3/min. At the same time hydraulic rupture fluid contains particles of proppant, radius of which is determined by analytical expression in case when proppant particles are heavier than fluid, or by other analytical expression in case if proppant particles are lighter than fluid.

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3 cl

FIELD: oil and gas production.

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3 cl, 3 dwg

FIELD: ceramics.

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EFFECT: enabled manufacture of granules having low loose density and high strength allowing their use at depths up to 14000 feet (4200 m).

3 cl, 1 dwg, 1 tbl, 3 ex

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