The device to turn off layers from each other in the well (options)

 

The invention relates to the oil and gas industry and can be used when disabling the leaking sections of the casing from the reservoir when disabling and re-enabling the upper and intermediate flooded deposits. The technical result is to simplify the mounting and Dismounting equipment, providing high reliability division versatility. The device consists of two pakiruumi elements similar in design. Each of them includes a housing, an elastic cuff that extends the cone and the base pipe. Pokerwise elements are interconnected by an intermediate pipe or pipes. In pass-through channel of the lower pokerwise element check valve. According to the second variant of the device is provided with a sub connected to the support pipe top pokerwise element, which is “whipped” valve. According to a third variant of the device is equipped with a spring-loaded valve installed in the supporting tube of the upper pokerwise element. 3 C. p. F.-ly, 4 Il.

The invention relates to the oil and gas industry, namely to remedy casing from vozdeistviyami and re-enabling the upper and intermediate flooded deposits.

A device for repair of the casing, including the drive, expansion cone and the expandable pipe. The device is equipped with additional widening cone placed inside the pipe, made with thicker at the inside ends, and associated with the main [1].

The disadvantage of this device is the necessity of using large working force when pulling the expansion cone through the thickened ends and, in this regard, the possibility of an emergency. In addition, when removing from a well extending cones extensible ends of the several depart from the casing, which leads to leakage of the repair.

The closest in technical essence to the present invention is a device comprising upper and lower pokerwise elements, each of which includes an elastic cuff and extending cone, interconnected intermediate pipe (pipes), supporting the nozzles, o-rings and shear elements [2].

The drawbacks are:

- the complexity of the installation, dismantling and removal of the device from wells involves the use of a pump unit);

- lack of reliability of the isolation annulus, who caused the situation.

The objective of the invention is to provide a device simple in terms of installation and dismantling, with high reliability isolation and enable its use in a wide range of technological operations.

This problem is solved by the proposed device comprising upper and lower pokerwise elements, each of which includes an elastic cuff and extending cone, interconnected intermediate pipe (pipes), supporting the nozzles, o-rings and shear elements.

New (according to first embodiment) is that pokerwise elements have hulls in the form of pipes with couplings that have elastic cuffs and expanding cones, and the inner surface of the coupling is cylindrical and smooth and has an internal diameter below the outer diameter of coupling the lower end of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, telescopically mounted in cylindrical samples of the reference nozzle and connected with the last cut elements element, in pass-through channel which has a check valve; the lower parts of the elastic cuffs enclosed in metal housings with longitudinal slits and curved inward ends fixed to the upper part of the support pipes.

According to the second variant it is new that pokerwise elements have hulls in the form of pipes with couplings that have elastic cuffs and expanding cones, and the inner surface of the coupling is cylindrical and has a smooth inner diameter under the outer diameter of coupling the lower end of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, telescopically mounted in cylindrical samples of the reference nozzle and connected with the last cutting elements; the device has a supporting tube, connected through the filter and the support pipe housing bottom pokerwise element in the flow channel which has a check valve; the lower parts of the elastic cuffs enclosed in metal housings with longitudinal slits is output from the reference nozzle upper pokerwise element sub, where is “whipped valve” reporting in the working position vnutrikabinnoe space with the inner space of the device.

According to the third new option is that pokerwise elements have hulls in the form of pipes with couplings that have elastic cuffs and expanding cones, and the inner surface of the coupling is cylindrical and smooth and has an internal diameter below the outer diameter of coupling the lower end of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, telescopically mounted in cylindrical samples of the reference nozzle and connected with the last cutting elements; the device has a supporting tube, connected through the filter and the support pipe housing bottom pokerwise element in the flow channel which has a check valve; the lower parts of the elastic cuffs enclosed in metal housings with longitudinal slits and curved inward ends fixed to the upper part of the support pipe; device is ereryvody radial channels, reporting in the working position vnutrikabinnoe space with the inner space of the device.

In Fig.1 shows the proposed device in longitudinal section lowered into the well (the 1st option).

In Fig.2 - same (2nd option).

In Fig.3 - same thing (the 3rd option).

In Fig.4 - metal casing.

Option 1

The device consists of two pakiruumi elements (Fig.1): lower and upper, the design of which is exactly the same.

Pokerwise element comprises a housing 1, made in the form of a pipe having in the upper part of the clutch 2, the internal surface of which is cylindrical and smooth. In the case worn elastic cuff with 3 tapered bore 4 on the inner and annular zones 5 - on the outer surfaces and extending cone 6 with annular ribs on the outer surface. The sleeve 3 from the bottom rests on the supporting tube 7 with the inner cylindrical sample 8, in which is telescopically mounted the lower end of the housing 1 with an outer annular ledge 9. The lower portion of the cuff 3 is placed in a metal casing 10 (Fig.4) with longitudinal slits in the top and curved inward ends fixed to the support pipe 7 of the fastening elements 11. Reference panty interconnected intermediate pipe (pipes) 14 with the coupling 15 on the lower end, which is part of the clutch 2 and connected to the cutting elements 16. The upper end of the pipe (pipe) 14 connected to the support pipe 17 top pokerwise element.

The coupling 18 of the housing upper pokerwise element shear elements 19 are connected with the coupling 20 of the lower end of the riser pipe 21.

In the flow channel of the housing 1 top pokerwise element check valve 22. The supporting pipe 7 is connected with the housing 1 shear elements 23.

The mating surfaces of the components of the unit are equipped with sealing rings 24.

Option 2 (Fig.2)

This option differs from this in that it contains sub 25 located below the supporting pipe 17 top pokerwise element. The sub is equipped with a “whipped” by valve 26 reporting in the working position vnutrikabinnoe space well with the internal space of the device.

Option 3 (Fig.3)

This option differs from the first because it contains a spring-loaded valve 27 mounted in the support pipe 17 top pokerwise element and overlying the radial channels 28 reporting in the working position vnutrikabinnoe space well with the internal space of the device.

The device operates as follows.

Option 1 (Fig.1 is I) or disable the leaking section of the casing string.

In this case, the inside of the casing for lifting the pipe 21 despise the proposed device so that the lower pokerwise element is positioned above the reservoir and the top of obwodnica layer or leaks in the casing located between petrowski elements. The tool is put on the bottom of a well, give partial unloading, under the influence of something cutting elements 23 are destroyed, the body 1 with the expansion cones 6 down, elastic cuffs 3 under the influence of the cones open, tightly adhering to the walls of the column 30. Then create the additional tool unloading, under the action of which destroyed shear elements 19, the lifting pipe 21 is lifted and through them inside the column 30 create an increased pressure and determine the degree of sealing pakiruumi elements. Then lifting pipe lift on the surface, the well is deep down the pump and lead to further exploitation of the productive formation.

If necessary, the device is removed from the well through the inner or outer trobolowsky first upper pokerwise element with intermediate pipes, this breaks down the cutting elements 16 and the secondary descent Troyes after a certain time of operation of the lower productive formation there is a need to connect to the simultaneous operation of the upper and previously obwodnica the reservoir (by this time to this area may come pillars oil). In this case, the well down the proposed device with sub 25 with “whipped” by valve 26, so that “whipped” valve is facing the top of Obvodnogo productive formation.

The process of spacerace carried out in the same way as it was done in version 1.

Then exploit the lower reservoir, for example, with the subsequent descent into the borehole of the downhole pump. In order to put into operation the upper flooding of the reservoir, lift pump, the lower column tubing (tubing) with a plunger (not shown) and destroy “whipped” valve 26 and raise the drill pipe. After that, deep down the pump and continue to operate the upper and lower reservoirs simultaneously.

Option 3 (Fig.3) as option 2, is used when after a certain time of operation of the lower productive formation there is a need to connect to the simultaneous operation and the upper reservoir, but with the possibility of subsequent shutdown when reaching unprofitable limit watering products. In this case, the well down the proposed device equipped with modplugin. the process of spacerace is carried out similarly as it is done in option 1.

Then exploit the lower reservoir, for example, with the subsequent descent into the well on tubing downhole pump with a plunger (not shown). When necessary (for commissioning the top of the reservoir water flooding) submersible pump to allow device. The plunger, acting on a spring-loaded valve 27 opens radial channels 28 and thereby informs vnutrikabinnoe space well with the internal space of the device. Include the pump and lead to the simultaneous operation of the upper and lower producing formations. If the water content of the upper productive formation has increased dramatically, and its operation became unprofitable, the pump plunger is lifted, the valve 28 is returned to its original position, and continue to exploit the lower reservoir.

The healing process of the device from the well under options 2 and 3 is carried out similarly as it is done in option 1.

The proposed device does not require for its installation, use of the pump. Exclude the possibility of bias pakiruumi elements, because their triggering occurs when the emphasis is on passing the channel prevents the ingress of wellbore fluid into the reservoir during operation, killing and repair of wells. Opposite the productive formation forms a water seal from the oil and prevents contact of the extracted oil from produced water accumulated at the well bottom, which ensures the preservation of reservoir properties of the formation.

The proposed device can be successfully applied for re-entry of the reservoir water flooding into operation together with the exploited strata for the extraction of pillars oil generated during cyclic waterflooding, the change of filtration flows, as well as in the result of the gravitational redistribution of residual oil and water in the bottom hole zone of the reservoir water flooding, thereby increasing the oil recovery factor.

Sources of information

1. Similar: A. S. No. 1086118, IPC E 21 In 29/00, 1984.

2. Prototype: RF patent №2161238, IPC E 21 In 29/00, 2000.

Claims

1. The device to turn off layers from each other in the well, spuskaemogo lifting pipes, comprising upper and lower pokerwise elements, each of which includes an elastic cuff and extending cone, interconnected by an intermediate tube or pipe, support pipe, o-ring and shear elements, wherein p and expanding cones, moreover, the inner surface of the coupling is cylindrical and smooth and has an internal diameter below the outer diameter of the couplings: the bottom of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, telescopically mounted in cylindrical samples of the reference nozzle and connected with the last cutting elements; includes supporting tube, which is connected via a filter and the reference nozzle housing bottom pokerwise element in the flow channel which has a check valve; the lower portions elastic cuffs enclosed in metal housings with longitudinal slits and curved inward ends fixed to the upper part of the support pipes.

2. The device to turn off layers from each other in the well, spuskaemogo lifting pipes, comprising upper and lower pokerwise elements, each of which includes an elastic cuff and extending cone, interconnected by an intermediate tube or pipe, support pipe, o-ring and shear elements, featuring the ranks of the cuff and extends cones, moreover, the inner surface of the coupling is cylindrical and smooth and has an internal diameter below the outer diameter of the couplings: the bottom of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, telescopically mounted in cylindrical samples of the reference nozzle and connected with the last cutting elements; includes supporting tube, which is connected via a filter and the reference nozzle housing bottom pokerwise element in the flow channel which has a check valve; the lower portions elastic cuffs enclosed in metal housings with longitudinal slits and curved inward ends fixed to the upper part of the support pipe; provided United with the supporting pipe top pokerwise element sub, which is “whipped” valve, reporting in the working position vnutrikabinnoe space with the inner space of the device.

3. The device to turn off layers from each other in the well, spuskaemogo lifting tubes containing Verhnie between the intermediate pipe or pipes, the reference nozzles, o-rings and shear elements, characterized in that pokerwise elements have hulls in the form of pipes with couplings that have elastic cuffs and expanding cones, and the inner surface of the coupling is cylindrical and smooth and has an internal diameter below the outer diameter of the couplings: the bottom of the riser pipe connected to the upper patrolsim element, and the lower intermediate pipe connected to the bottom patrolsim element, the said coupling is connected to the coupling housings shear elements; the lower ends of the housings provided with outer annular projections, mounted telescopically in cylindrical samples of the reference nozzle and connected with the last cutting elements; includes supporting tube, which is connected via a filter and the reference nozzle housing bottom pokerwise element in the flow channel which has a check valve; the lower parts of the elastic cuffs enclosed in metal housings with longitudinal slits and curved inward ends fixed to the upper part of the support sleeves; fitted with a spring-loaded valve installed in the supporting tube of the upper pokerwise element and overlying the radial is

 

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FIELD: construction of gas-oil pipe-lines, applicable in other branches of industry.

SUBSTANCE: the simplicity of realization of the method is attained by the fact that a cord shaped charge is put on the structure in such a way that it would be pressed to its surface by a force, and the ends would join without any clearance, then the longer section of the cord shaped charge is cut off, the sticked facing sheet is removed from it and tightly put with the inner side on the cord shaped charge installed beforehand, the projecting ends are located in alignment with respect to each other, fixed, the detonator is connected, and the explosive device is blown up. At cutting of the pipe-line the cord shaped charge tightly envelops it around the edges, and the charge ends join each other without any clearance. Depending on the conditions of burst the electric detonator is connected either perpendicularly to the side surface of the cord shaped charge, or in parallel with its axis, or the projecting ends of the longer section of the cord shaped charge are symmetrically folded with respect to each other, fixed, and electric detonators are connected to each end.

EFFECT: reduced labor content, enhanced efficiency and safety engineering.

5 cl, 1 ex

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