Device for secondary opening and create a depression on the formation

 

The invention relates to the oil industry and can be used as equipment for secondary opening of productive formations in oil and gas wells for treatment of bottom-hole formation zone and for wells from mud, sand, wax, tar and other hard-to-wash deposits, and also to overlap the hole. The device includes a housing, depression and sloprano camera with a check valve, sealing and cutting elements, means for lowering and lifting and perforated shank. The case is made with a ledge at the top and two rows of radial channels, which in the initial position overlapped with the upper spring sleeve, and provided with a nipple. The radial channels are separated by a hollow transverse partition. The nipple is made with upper and lower annular lugs, between which the through holes with installed ball-retainers. The nipple is connected with a perforated shank and telescopically with the case. In the initial position of the ball-clamps interact externally with the lower sleeve. The lower sleeve is connected to the nipple shear element and spherical sampling performed on the outer surface is determined with the possibility of longitudinal movement. The lower annular stop nipple provided with sealing elements, and its outer diameter is selected under the internal diameter of the sleeve. Perforated shank provided with a hollow stop with bench and locking ring on the outer surface. The landing sleeve connected shear element with the body reference node that is installed as part of the casing. The outer diameters of emphasis selected under the internal diameter of whipped funnel. As depression and sloprano cameras used tool for lowering and lifting device. Whipped funnel mounted in the cylindrical bore of the landing sleeve between the reference node and connected to the cutting element to interact with blind plugs installed in the casing opposite the producing formation. The use of the invention allows to extend the functionality of the device. 1 Il.

The invention relates to the oil industry and can be used as equipment for secondary opening of productive formations in oil and gas wells for treatment of bottom-hole formation zone and for wells from mud, sand, wax, tar and other trudnoci is in the method of implosion, consisting of implosion chamber, through which the electronic unit and geophysical headgear is attached to the logging cable. In the upper part of implosion camera hanging groupstage, and at the bottom is a stepped rod connected with the centering sleeve with overlapping Cams in the transport position and interaction with grisostomo to release the glass from engagement with the sub [1].

The drawbacks are:

- low efficiency of the device, due to the fact that when you open implosion and the camera will be populated mostly by the downhole fluid, and not cuttings and formation fluids;

- high cost of the device, owing to the use of electronic equipment and wireline;

- limited functionality.

The closest in technical essence to the present invention is the device of depression cleaning wells, comprising a housing, depression and sloprano camera with a check valve, perforated liner, sealing and cutting elements, means for lowering and lifting [2].

Significant disadvantages of the device are:

- limited amount of glamorie the possibilities;

the device allows to achieve a temporary effect, because after his ascent, the impurities contained in the wellbore, will again enter into the pores and channels of the productive formation and reduce its permeability;

significant material costs.

The objective of the invention is to provide a device with almost unlimited sloprano camera, with greater functionality, allowing you to save large financial resources.

This problem is solved by the proposed device, comprising a casing, depression and sloprano camera with a check valve, perforated liner, sealing and cutting elements, means for lowering and lifting.

What's new is that the body is made with a ledge at the top and two rows of radial channels, separated by a hollow transverse partition, which in the initial position overlapped with the upper spring sleeve, and provided with a nipple that is connected with a perforated shank and telescopically with the body; the nipple is made with upper and lower annular lugs, between which the through holes with installed ball-retainers, in the initial position interacting with the Ute with a spherical samples on the outer surface of the housing; the upper and lower sleeves are made with a cylindrical sample on the inner surface and installed with the possibility of longitudinal movement; the lower annular emphasis supplied with sealing elements, and its outer diameter is selected under the internal diameter of the sleeve being coupled shear element with the body reference node that is installed as part of the casing; perforated shank provided with a hollow stop with bench and locking ring on the outer surface, and the outer diameters of emphasis selected under the internal diameter of whipped funnel mounted in the cylindrical bore of the landing sleeve between the reference node and connected with her shear element to interact with blind plugs, mounted in the casing opposite the productive formation; as depression and sloprano cameras used tool for lowering and lifting device.

The drawing shows the proposed device in longitudinal section.

It consists of a body 1 with emphasis 2 on top, two rows of radial channels 3, separated by a hollow transverse partition 4. Telescopically to the housing 1 has a nipple 5, provided with a top 6 and bottom 7 ledges, the initial position of interacting with the lower movable sleeve 10, which is connected with the nipple shear elements 11. Balls-clips on the inner side interact with a spherical samples 12 of the housing 1. Inside the nipple 5 in the area of the bottom of the ledge 7 is installed ball 13-return valve with mesh 14. The nipple is connected with a perforated shank 15, and the latter in turn with a blind stop 16 with the ledge 17 and the locking ring 18. The lower ledge 7 of the nipple provided with sealing elements 19.

Radial channels 3 in the initial position overlapped with the upper movable sleeve 20, between which and the focus 2 has a spring 21.

Sleeve 10 and 20 is made with a cylindrical sample 22 on the inner surface. The mating surfaces of the parts provided with sealing elements 23. The length of the nipple 5 is taken from the conditions for perforated shank 15, which is connected with him, when installing the device in the well was below the perforations of the productive formation.

Depression Luggage are tubing 34. Sloprano the camera form the tubing 34, block 1, the nipple 5, the perforated shank 15 and the deaf focus 16. Means for lowering and lifting device are tubing 34.

Works ostropahnushchimi 25, filled with bitumen, and above their reference node, consisting of a body 26, a landing sleeve 27 and whipped funnel 28 which are interconnected shear elements 29 and 30. The landing sleeve 27 has a tapered surface, and whipped funnel 28 is an annular recess 32 under the retainer ring 18. Casing 24 is set so that the housing stub 25 was opposite the productive formation 33. Then the well cement in a known manner and after RFQ (waiting for the solidification of the cement inside the casing tubing (tubing) 34 despise the proposed device. When it moves down a blind stop 16 is in whipped funnel 28, with the retainer ring 18 is in the recess 32, under the action of shear load elements 30 are destroyed, tubing and whipped funnel continues to move down and destroy deaf stub 25. Upon further downward movement of the lower sleeve 10 abuts the landing sleeve 27 and the reference node, and the lower ledge of the 7 seals will go in it and isolates the bottom-hole zone from the wellbore. Shear elements 11 are destroyed, the nipple 5 and the sleeve 10 are displaced relative to each other, balls, retainers 9 are in the sample sleeve 22 is set opposite the sample 22 of the sleeve 20, then there is a message well bottom-hole zone from the inner space of the tubing under atmospheric pressure. Creates a deep depression in the reservoir, resulting in open channels in the hollow stub 25, opened the reservoir and cleaned from dirt, sludge and liquid trapped in the reservoir during the initial opening of the reservoir through the holes in the shank 15, the check valve 13, the Central channel of the housing, the radial channels 3 and sample 22 of the sleeve 20 fall into the tubing. After the implosion processing tubing lift, and with them the body 1, the sleeve 20 and the spring 21, while under the influence of the latter sleeve 20 overlaps the radial channels 3. All other components remain in the well.

The depression on the layer can be adjusted by pouring a definite volume of liquid in the tubing.

Then in the hole down the pump and produce development and operation in the usual manner.

The landing sleeve 27 and whipped funnel 28 is made of drillable material, such as cast iron.

If necessary, the work below the productive formation (deepening of the borehole, sidetrack, and so on) using internal trobolowsky raise from the well left there to yameru casing.

The proposed device allows to carry out a complex of works after drilling one descent-ascent tubing using a single device, namely, the secondary opening of the reservoir, clean the reservoir and the bottom of the sludge and dirt and overlapping wellbore. This saved considerable material resources. Reach an unlimited amount sloprano camera. After lifting the tubing reservoir is isolated from the wellbore nipple with check valve, and therefore there is no negative impact on reservoir water, well killing fluids and impurities present in the wellbore. In addition, the presence of a shaft mounted below the perforations, helps to create the water seal from oil opposite the productive formation during operation and thereby dramatically reduces the rate of water extraction from a bottom part of the productive formation.

Used information

1. RF patent №2086753, MKI 6 E 21 In 37/00, 1997 (analog).

2. RF patent №2099506, MKI 6 E 21 In 37/00, 1997 (prototype).

Claims

Device for secondary opening and create a depression on a layer that includes a housing, depression and slo for lowering and lifting, characterized in that the casing is made with a ledge at the top and two rows of radial channels, separated by a hollow transverse partition, which in the initial position overlapped with the upper spring sleeve, and provided with a nipple that is connected with a perforated shank and telescopically with the body, the nipple is made with upper and lower annular lugs, between which the through holes with installed ball-retainers, in the initial position of the interacting outside with the lower sleeve connected to the nipple shear element, and from the inside with a spherical samples, performed on the outer surface of the shell, the upper and lower sleeves are made with a cylindrical sample on the inner surface and installed with the possibility of longitudinal movement, the lower annular emphasis supplied with sealing elements, and its outer diameter is selected under the internal diameter of the sleeve being coupled shear element with the body reference node that is installed as part of the casing, a perforated shank provided with a hollow stop with bench and locking ring on the outer surface, and the outer diameters of emphasis selected under internal d is Oh with her shear element, to interact with blind plugs installed in the casing opposite the productive formation, as depression and sloprano cameras used tool for lowering and lifting device.

 

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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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