A device for processing formations in wells method implosion

 

The invention relates to the field of production of liquid fluids in wells and, in particular, is designed to handle depleted productive layers at low flow rates or small static level of the liquid column in the well, for example, to stimulate oil production and for cleaning pipes from layers in the wells. The device is made with the possibility of hanging to the rope or rod to descend into the well. The device includes a piston-cylinder, valve, forming a closed cavity having side Windows. A closed hollow cylinder closed at its bottom by a piston. The top of the cylinder is closed by a cover. To the piston of the suspended load. Cylinder hanging from a rope or rod. The closed cavity of the cylinder is communicated through the side window with the cavity well. The valve is located inside the cover and is arranged to close when moving the cylinder up. As cargo to the piston is suspended from the shell and/or islamological. Simplified operations and reduced their cost. 1 C.p. f-crystals, 2 Il.

The invention relates to the field of production of liquid fluids in wells and, in particular, is designed to handle depleted productive layers at low flow rates or small static is used to clean pipes from strata in wells or other purposes.

Known devices [1-5], where the implosion method is implemented by means of a rupture of the diaphragm separating the tightly enclosed chamber from the well. Ways rupture diaphragms may be different, but everywhere is in the process of creating severe depression for cleaning the bottom-hole zone and stimulation fluids.

These devices are direct analogues in relation to the offer.

To the common drawbacks include the following:

1. the device can perform a single action or has a limited number of apertures, which is in most cases insufficient for satisfactory cleaning of the reservoir;

2. the need to run a string of tubing (tubing) and its Petrovci in the borehole;

3. lack of effectiveness on the end result and the high cost of execution of works on processing of the layer.

A device [6], where the implosion method is implemented repeatedly to create a depression on the layer. The device is lowered into the well on tubing tubing and is positioned so that the open of depression of the camera was opposite the interval of the processed layer. Then the well pokeroot. Next Annie saddle. Then the plunger was raised to the level above the Windows of the camera. When lifting the plunger valve is closed and the chamber creates a vacuum. After reaching the lower end of the plunger upper part of the chamber (the area above the Windows) downhole fluid from podvecerni zone flows into the lower part of the chamber, creating a bottom-hole zone instant depression. The pressure in the wellbore area is reduced to atmospheric, because the liquid column in the annular space in the casing is separated by a packer, and fluid in the tubing is blocked by the plunger. Under the action of the depression of the liquid from the reservoir enters podarennuyu zone wells and depression in the camera. The cycle is then repeated, and the process of cleaning the bottom zone of the products sedimentation continues until you obtain the desired results.

This unit is in overall detail and principle of operation is the closest to the claimed and therefore accepted by us for the prototype.

The main disadvantage of the prototype include the following:

1. complex design of downhole equipment: the need to run a string of tubing (tubing), installation of the packer;

2. the inevitability of the installation hole of the machine for lowering and lifting the tubing;

3. to create discharging the Arians with severe consequences and are not used for the benefit of the forces of inertia;

4. the relatively high cost of manufacture of works on processing of the layer.

The proposed device for processing formations in wells method implosion made with the possibility of hanging to the rope or rod to descend into the well and includes a piston - cylinder, valve, forming a closed cavity having side Windows, telling the cylinder chamber with the cavity well. The device has a lid closing the top of the cylinder, and cargo, while the closed cavity of the cylinder is closed at its bottom by a piston, the valve is located inside the cover, the load is suspended from the piston, cylinder hanging from a rope or a rod, the valve configured to close when moving the cylinder up. As cargo to the piston is suspended from the shell and/or islamological.

The device shown in Fig.1, 2. In Fig.1 shows a variant of the device is suspended from the piston by samolotem as cargo; Fig.2 is suspended from the piston shell.

The device consists of a cylinder 2, which has the side window 4 for inlet of fluid from the bore in the cylinder 2, a piston 3, which is suspended from the load 5, the top of the cylinder 2 is closed by a cover 6, within which is located the valve 7. The cylinder 2 and the cover 6 are rigidly connected with each other and form a closed vesenny on a cable or rod 8 in the well, cased and cemented the production column tube 1, which has a perforation hole for communicating the wells reservoir (wavy arrows indicate the direction of flow of fluids from the formation into the well through the perforations in the casing).

The device operates as follows. It descends into the well to the level of the liquid column. When entering the load 5 in the liquid piston 3 is moved to its extreme upper position. After immersion of the entire shell in liquid machinist winch (or machine) dramatically slows the descent and does the reverse on the rise. At this time, the piston 3 the trestle 5 of inertia goes down, and the cylinder 2 is upward, the valve 7 is closed, and in the cavity of the cylinder (implosion chamber creates a vacuum. At the time when the piston 3 downward opens the window 4, the fluid from the well will flow into the chamber of the cylinder, creating a bottom-hole zone instant depression.

Then the cycle repeats, and thus is a multiple of an implosion effect to the layer.

In cases where the daily flow of oil in the well is low, this suggests that in the bottomhole formation zone (PPP) has increased the flow rates, as a rule the water. For decolletee PPP is necessary to carry out the extraction process of mudding from the reservoir into the well. Implosion is one of the most effective and proven methods of cleaning the PPP.

In our case, the well is involved, for example, hoist, which instead of cable is wound onto the winch cable. At the end of the rope is attached to the device shown in Fig.1, 2, and descends into the well. Then in the perforated interval of the production string is reversing device movement (up-down), and thus is a multiple of an implosion processing layer. Use as cargo hanging from a piston, islamologists or jelonki more appropriate, because it is necessary simultaneously with cleaning of the PPP and the removal of the clogging material in the hole to make loosening sludge and removing it from the well. In the absence of a well circulating agent, this problem is solved by the use in the composition of the claimed device of samoborsko that allow after treatment of the formation to raise the mudding from the well to the surface.

The main advantages of the proposed device in comparison with analogues:

1. it uses the unlimited power capabilities ine the inu installation for lowering and lifting pipes and other auxiliary or special equipment;

3. does not require Petrovci well and generate excessive pressures;

4. when working in the borehole excluded emergency and hazardous situations associated with hydroshock phenomena;

5. implemented simultaneously decollimate floridapayday channels and their wave pumped for the development and dissemination of new micro - and microtrain in the vicinity of the borehole;

6. works well has a lower cost.

Sources of information

1. A. C. the USSR №156127, E 21 IN 43/18, BI No. 15, 1963, the Vessel for processing the well bottom zone of the implosion method.

2. A. C. the USSR №281327, E 21 IN 43/00, BI No. 29, 1970 Device for cleaning wellbore zones method implosion.

3. A. C. the USSR №599041, E 21 IN 21/00, BI No. 11, 1978, a device for cleaning the bottom-hole zone of the well.

4. A. C. the USSR №947397, E 21 IN 43/00, BI No. 28, 1982, the Device for creating a depression on the layer.

5. A. C. the USSR №968349, E 21 IN 43/00, BI No. 39, 1982, the Device for creating an instant depression on a layer.

6. Popov A. A. implosion in the processes of production. M.: Nedra, 1996, S. 115-116.

Claims

1. A device for processing formations in wells method implosion made with the possibility of suspension to the cable or rod to descend in the UK is non-closed hollow cylinder with a hollow bore, characterized in that it has a lid closing the top of the cylinder, and cargo, while the closed cavity of the cylinder is closed at its bottom by a piston, the valve is located inside the cover, the load is suspended from the piston, cylinder hanging from a rope or a rod, the valve configured to close when moving the cylinder up.

2. The device under item 1, characterized in that as a load to the piston is suspended from the shell and/or islamological.

 

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FIELD: oil extractive industry.

SUBSTANCE: device has pit-face cutting valve and mounting tool. Cutting valve has body, packer with check valve and perforated tail. Mounting tool has hollow rod, connected by shear elements to expanding cone of packer, lower and upper bodies. Lower body is provided with self-compacting collar, and upper - through tubing string of limited volume and sleeve is connected to drop valve cylinder. Valve rod is connected to rope, on which device is lowered into well. Hollow rod and tubing string form depression chamber being at constant atmospheric pressure. Rod has upper and lower shelves. On shelf of upper body expander of self-compacting collar having longitudinal grooves is mounted. After raising of mounting tool from well packer, body with tail and check valve remain in it. Then a pump is lowered into well.

EFFECT: lower costs.

3 dwg

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