Device for complex treatment of face-adjacent well zone

FIELD: oil industry.

SUBSTANCE: device for complex treatment of face-adjacent well zone has thermal gas-generator charged with fuel with electric igniter and pipe-shaped container with acid solution, made with perforation apertures, both mounted on rope-cable. Acid solution is positioned in thermal-melting hermetic tank inside the container. Device is additionally provided with depression chamber and impact-wave effect chamber, containing remotely controlled fast-action locks, with two packers, mounted at ends of pipe-shaped container. Packers are opened under pressure from gases from gas generator. After operation of gas generator is finished, packers release pipe-shaped container. Depression chamber, impact-wave effect chamber and gas generator are jointly connected.

EFFECT: higher efficiency.

2 cl, 1 dwg

 

The invention relates to the oil industry and can be used for complex processing and treatment of bottom-hole zone of the well.

A device for the acid treatment of bottom-hole zone of the well, including valves for wellhead, pumping unit for pumping acid into the well, the tank truck for transportation of acids, manifold for connection with a tanker reception pump and wellhead equipment /Molchanov, GV and other Machines and equipment for oil and gas. - M.: Nedra, 1984. - s-422/.

The disadvantages of the system are the complexity of the equipment needed for cleaning the well bottom-hole zone, and low processing efficiency (45-55%).

It is also known a device for the integrated treatment of bottom-hole zone of the well, including installed on the cable-the cable is equipped with fuel thermogenerator with electric igniter and a tubular container with the acid solution, and the tubular container is made with perforations, and the acid solution is placed in a sealed container inside a container. /Pavlenko GA and other Intensification of flows of oil and gas using thermodynamic methods of influence on the PPP. Petroleum engineering. No. 6, 1999. - p.29-35/.

The disadvantage of this device is that it does not provide timely cleanup item is Sabinas zone of the reservoir (PPP) from the reaction products of the acid with rock and asphalt, resin and paraffin deposits (ARPD), resulting in the cooling of the reaction products and the transition to the solid phase of high molecular weight hydrocarbons, which significantly reduces the processing efficiency of bottom-hole zone of the well. This device is accepted by us for the prototype.

The objective of the invention is to improve the efficiency of processing bottom-hole zone of the well.

The technical result is achieved in that the device complex treatment of bottom-hole zone of the well, including installed on the cable-the cable is equipped with fuel thermogenerator with electric igniter and a tubular container with the acid solution made with perforations. The acid solution is placed in a hot-melt sealed containers. The device is further provided with a depression Luggage and Luggage shock wave impact. Both contain a remotely operated quick-acting closures. The tubular container is provided with two packers are installed on the ends and pop-under pressure gases from thermogenerator.

Depression Luggage, Luggage shock wave exposure and thermogenerator are connected pivotally. Depression Luggage made of drilling high-pressure hoses.

The invention consists in that the supply device additionally depression camera, camera beats the RNO-wave effects and the two packers, limiting the treatment area, there is the possibility of thermochemical processing, extracts after exposure to and removal of the reaction products in strictly measured time interval and at a given plot of the PPP, which significantly improves the processing efficiency of bottom-hole zone of the well.

The drawing shows the proposed device complex treatment of bottom-hole zone of the well.

The device has installed on the cable-the cable 1 connected to each other through hinges 2 and 3 depression chamber 4, the shock wave chamber 5 and thermogenerator 6, under which is mounted a tubular container 7 is sealed with hot-melt capacity of 8 for acid solution.

Depression chamber 4 made of drilling high-pressure hose and is equipped with a remotely controlled via cable 9 fast shutter 10. Shock wave chamber 5 is made of tubing and is also provided with a fast shutter 11 is controlled by a cable 9. Fast-acting valves 10 and 11 have the same structure and contain the differential piston, the cylinder, the actuator and the position lock (not shown).

The housing 12 thermogenerator 6 made of steel pipes with internal ceramic lining 13. Thermogenerator 6 fitted with a sealed cable head 14, the firmness of the smoke fuel in the form of checkers 15 with an axial hole 16, the electric igniter 17 mounted on the lower pieces and connected by wires 18 with the cable head 14 and the cable 9. At the bottom of the body cavity 12 thermogenerator 6 posted by the cooling chamber 19, the inner surface of which is lined cooler gases 20. Pieces 15 are held at a given level by means of a lattice 21.

At the ends of the container 7 mounted packers 22 and 23 connected respectively through the bypass channels 24 and 25 with the inner cavity of the container 7. Between thermogenerators 6 and the upper packer 22 posted by hot melt membrane 26. Tubular container 7 is made with perforations 27 and is provided with an airtight container 8 to a solution of acid, such as hydrochloric. Capacity 8 made of a material raspravlyayuschegosya under the influence of high temperature, for example of polyethylene. The lower end of the packer 23 is provided with a lug 28, withstand high pressure and temperature of the hot gases. Connection thermogenerator 6 packer 22 is carried out by means of a coupling 29. As the wire rope cable 1 use multi-conductor logging cable, can withstand loads of up to 5 tons. The cable 9 is attached to the chambers 4 and 5 metal belts 30. Casing 31 provided with perforations 32, connecting the well with the bottom hole zone of the reservoir 33. Depression Kam is RA 4 is also equipped with a plug 34 and is made with the adoptive Windows 35. Shock wave chamber 5 is made with Windows 36. The annular space 37 is formed by the casing 31 and the container 7.

The device operates as follows. Before processing the well cleaned, washed and filled with water with a minimum content of mechanical impurities. After equipment thermogenerator 6 necessary elements: fuel 15, the electric igniter 17, cable head 14, and the container 7 is an acid solution into the well consistently lower container 7 with the packers 22 and 23, thermogenerator 6, the shock wave chamber 5 and the depression chamber 4. Simultaneously with the descent from the outside of the chambers 5 and 4 is attached to the cable 9. The container 7 with an acid solution and with the packers 22, 23 is placed in front of the perforations 32 of the casing 31. From a power source (not shown) on the cable 9, through the cable head 14 is pulse of current to the electric igniter 17, which triggers the beginning of the combustion process checkers 15 solid fuel. The membrane 26 is melted and hot gases under high pressure through the channels 24 and 25 reveal the packers 22 and 23 and push the acid solution from the hot melt tank 8 through the perforations 27 in the container 7 and 32 in the casing 31 in the bottom zone 33. Hot gases pass through the cooling chamber 19 with the cooler 20, which reduces the rate is the temperature and gas pressure to the desired value.

After completing thermogenerator 6 the pressure in the bottomhole zone 33 is reduced and the container 7 raspberrys.

After exposure, is required for the chemical effects of acid on the bottom zone of the well, the cable 9 is fed a current pulse on a fast shutter 11 of the shock wave chamber 5, which is fast (0.1...0.3 MS) opens the receiving window 36. As a result, in the annular space 37 is formed by a short pressure pulse with a significant pressure gradient, which initiates a shock wave process, contributing to the waste reaction and dirt from the bottom-hole zone of the well. Final cleaning of the PPP is the inclusion of the depression chamber 4 by filing a current pulse through the cable 9 on a fast shutter 10. Opening reception window 35, there is a pulse of vacuum (pressure inside the chamber to atmospheric), resulting in the removal of reaction products from the PPP.

After finishing the first interval of the PPP unit elements raise to the surface, cleaned, seasoned and again lowered into the well to the processing of the next interval.

Petrovka container 7 packers 22 and 23 limits the impact zone on the PPP, thus increasing the effectiveness of its treatment.

The hinged connection of the main elements of the device of depression of the camera, shock wave to the measures and thermogenerator - improves the reliability of fastening them to each other and reduces the risk of accident during the descent into the well in difficult operating conditions, especially at the greater curvature of the wellbore.

Execution of depression chamber 4 of the flexible drilling high-pressure hoses, having a minimum burst pressure of more than 30 MPa, also increases the reliability of the device operation in difficult conditions.

Thus, the supply device additionally depression Luggage and Luggage shock-wave effects and the two packers, limiting the treatment area PPP, improves performance and increases the production of the well.

1. The device complex treatment of bottom-hole zone of the well, including installed on the cable-the cable is equipped with fuel thermogenerator with electric igniter and a tubular container with the acid solution made with perforations, and the acid solution is placed in a hot-melt sealed containers inside the tubular container, characterized in that it further provided with a depression the camera and the camera is shock-wave effects, contains a remotely operated quick-acting closures, and two packers mounted on the ends of the tubular container, drop down under the pressure of the gases thermogenerator and raspotroshila tubular container is donkey shutdown thermogenerator.

2. The device according to claim 1, characterized in that the depression chamber, the shock wave exposure and thermogenerator are connected pivotally.



 

Same patents:

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SUBSTANCE: device has pipe-like body with detachable upper and lower sleeves. Concentrically to body, with possible rotation relatively to it, a cover is mounted with blades with scrapers placed spirally on its surface. To lower sleeve a reactive end piece is connected with slit apertures. End piece hollow is filled with granulated material engaging in exothermal reaction with acid. Lower portion of end piece is provided with check valve. Upper sleeve is provided with check valve having locking element in form of sphere with shelf and centering elements, to be dropped from well mouth. Base of saddle of check valve is made in form of disc having diameter equal to diameter of body. Pass aperture of saddle in lower portion is overlapped with easily destructible and easily removed element. Length of sphere shelf is greater than height of pass aperture of saddle of check valve of upper sleeve.

EFFECT: higher reliability, higher efficiency, broader functional capabilities of device.

3 cl, 4 dwg, 1 tbl

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