SU1532688A1 - Slide-valve gate for circulation apparatus - Google Patents

Abstract

The invention relates to the mining industry. The goal is to provide a uniform axial bore in the housing after the device triggers. The device includes a housing 1 (K1) with an axial bore 2. Concentric K1 is equipped with a casing 3 with the formation of an annular chamber 6 between them. In the casing 3 and K1 there are radial holes 4 and 5 respectively. In the annular chamber 6 there is a spool bushing (B) 7. Hollow plugs 8 are installed in K1 against the lower end of B7. The upper end of B7 is made with an external groove 12, in which spring-loaded split rings (PRK) 10 are installed. The casing 3 against B7 is made with an internal groove 13, a thrust collar 14 and a radial channel 15 in the upper parts of internal flow ki Inside the internal groove is installed puller 11, made in the form of a flat spring. The grooves 16 are made on the outer surface of the RPC 10. To bring the device into the working position, a control plug is used, destroying the hollow plugs. The device is used in couplings, etc. and installed together with them in the wells. The control plug moving along the string of pipes destroys the plugs 8, as a result of which the B7 moves upwards as far as the PRK 10 stops into the collar 14. In order to move B 7 further to the height of one PPK 10, it is necessary to create a positive pressure difference between the annular and intracavity spaces. Each cycle of decreasing and increasing pressure allows B 7 to be moved upward to ensure hydraulic communication of the radial holes 4 and 5. This device allows to significantly reduce the cost of manufacturing downhole devices, to ensure their more reliable operation and to eliminate the need to drill out the control parts after the device has triggered. 4 il.

Description

3153

 sleeve (B) 7. In K1, against the lower tefra B7, hollow plugs 8 are installed; the blunt end B7 is made with an external groove 12, in which spring-mounted split rings (PRK) 10 are installed. 3 against B7 are made with an internal groove 13, a persistent collar And and a radial channel 15 in the upper part of the inner groove. Inside the internal groove is installed puller 11, made in the form of a flat spring. Notch the outer surface of the RPC 10 is grooves 16, To apply the device to the working position, a weir stopper is used, destroying the hollow zaglock. The device is used in couplings, etc., and is installed in conjunction with them in wells. Management

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The congestion tube moving along the pipe string destroys the plugs 8, as a result of which 87 moves up to the stop of the PRK 10 into the collar 1. To further move the B7 to the height of one PRK 10, it is necessary to create a positive pressure difference between the annular and intracavity spaces. Each cycle of decreasing and increasing pressure allows B 7 to move upward to ensure hydraulic communication of the radial holes k and 5. This device allows to significantly reduce the cost of manufacturing downhole devices, to ensure their more reliable operation and to eliminate the need to drill control parts after operation of the device. . 1 il.

The invention relates to mountainous | Industry, and more specifically to oil and gas, and can be used for the construction of a well in devices цем | LA cementing for the suspension of casing strings, packer devices, etc.

The purpose of the invention is to provide a launcher axial bore of the housing after the device has triggered., I FIG. 1 shows the proposed device, a black-nick section; on 3 oig. 2 - control obk; on OIG.Z - the initial position of the details of the slide valve of the circulation holes of the downhole devices when using the last one in the 4-stage cementing coupling; in fig. - the same, after the end of the step cementing.

The device includes a housing 1 with an axial bore 2 and a casing 3 with radial bores 4, 4 and k, 5, respectively, which are mounted concentrically relative to each other to form an annular chamber 6 between them, a spool bushing 7 spaced in an annular chamber 6, hollow plugs 8 installed in the housing 1 under the spool sleeve 7, the control plug 9, a set of split spring rings 10 and a puller 11 of split spring rings 10. The spool sleeve 7 in the upper part is made with an external groove 12, and the case 3 against gold The noose sleeve 7 is made with an internal groove 13, a thrust collar 1 and a radial channel 15 in the upper part of the internal groove 13. Split spring rings 10 are installed in the external groove 12 of the spool sleeve 7 and are made with grooves 16 on the outer surface. The puller 11 of split spring rings 10 is installed in the inner groove 13 of the casing 3 with the ability to interact with the grooves of 16 split spring rings 10 and is made in the form of flat springs, their lower ends rigidly connected to the casing 3. When using the proposed slide valve of the circulation holes of the downhole devices The step cemented clutch kit includes adapters 17 and 18 for connecting the casing 3 to the top and bottom of the casing, respectively. The housing 1 is fixed with respect to the casing 3 by a shear element 19, a landing sleeve 21 and a sealing assembly of the landing sleeve 21 are installed on the spring-loaded cracks x 20 in the axial hole 2 of the housing 1. It consists of an elastic cuff 22, a washer 23 and a damper 2k. In this case, the control plug can be a drop container consisting of a housing 25 with an end face 26 and a radial 27 channels and a sealing element 28.

The proposed slide valve of the circulation holes of the downhole devices works as follows.

In the position shown in FIG. 1, the slide valve of the circulation openings of the borehole devices is established depending on the purpose of the downhole device at a predetermined

goes out of engagement with the thrust collar 14.

Then the pressure in the column is increased again, the spool bushing moves up again until the next split spring comes in contact with the stop collar 14 and the puller 11 enters the groove 16. With the next interval of casing, drilling jg decreasing and increasing the pressure in the column or tubing and the next split is lowered into the well. Let us consider the further work of the proposed gate on the example of its use in stepped well cementing couplings. 8 depending on the technological scheme of work, the destruction of the hollow plugs 8 can be carried out

The gum ring and spool bushing is moved up above the stop collet until the circulating holes 3 and C in the casing 1 and the casing 3 are fully connected and fluid is circulating through them.

In the process of washing the wellbore from excess cement slurry during the cementing of the first stage-20 of the first stage, the stub is dropped into the column, or by the control plug 9. In this, the control container that is under

or separation plugs, in other cases, it is possible to flush the wellbore before cementing the second stage. Example. In the process of cementing the first stage, when the control separator tube passes through the cementing sleeve, the hollow plugs 9 are destroyed (and then turned off) and access from the column to the lower end of the spool bushing 7 is opened. Under the action of the pressure drop from the column to the lower end of the last sleeve

the action of the intrinsic mass and energy of the flushing fluid moves down the casing string down to its seating on the bushing 21. In this case, the internal cross section of the coupling below the circulation holes 3 and 4 overlaps, and the flushing liquid is circulated through the channels 26 and

30.27 container, case and casing. After keeping the technologically necessary time interval, the cement mortar of the second stage is pumped. After pumping, until the top of the estimated volume of the cement ventniy of the split spring 10-ring is in contact, the upper thrust is thrown into the column by the upper clamp 14 on the casing 3. With the perpetual plug (Sne is shown). In the moment

In this case, the loose end of the flat spring of termination of the cement mortar 7 is first pressed, and then, at the second stage, the upper cement returns to its original position, the 4Q plug sits on the controller already in the groove 16 of the split spring ring 10.

the container, when this happens, the cuffs unclench the cork sealing container assembly and the pressure inside the column begins to increase. The pressure after receiving the Stop signal at the end of the operation to suppress the tampon solution is reduced to atmospheric pressure in the column. In this case, a pressure drop arises from the side of the annular space, due to the column of cement slurry, raised in the first stage of the cement slurry, raised in the first stage above the cementing

50, ke 18. In this case, the flap 24 abuts against the sub 18 and is displaced upward relative to the washer 23, and the tapered portion of the slider 24 pushes the split part of the washer 23 and the sealing element in

couplings. Under the action of this pressure differential, the spool clutch is displaced. the cavity between the housing 1 and is blocked down, and the upper spring ring, code 24. held by the puller L, remains in place and after the spool bushing leaves it, it is elastically compressed and the radial openings 4 of the housing 1 are displaced below the radial openings in the casing 3, and rusk 20 fall out

the action of the intrinsic mass and energy of the flushing fluid moves down the casing string before it lands on the landing sleeve 21. At the same time, the internal cross section of the coupling below the circulation holes 3 and 4 overlaps, and the flushing liquid is circulated through the channels 26 and

27 container case and casing. After keeping the technologically necessary time interval, the cement mortar of the second stage is pumped. After pumping, the vial plug sits on the control

the container, when this happens, the cuffs unclench the cork sealing container assembly and the pressure inside the column begins to increase. The pressure of pro45 should be increased, and the cork enters the container. Upon reaching a given value of the pressure, the elements 19 are cut and the body 1 is shifted down to the stop into the translation

50, ke 18. In this case, the flap 24 abuts against the sub 18 and is displaced upward relative to the washer 23, and the conical part of the flap 24 pushes the split part of the washer 23 and the sealing element in

. the cavity between the housing 1 and the barrier - code 24.

the cavity between the housing 1 and the barrier - code 24.

The radial holes 4 of the housing 1 are displaced below the radial holes in the casing 3, and the crackers 20 fall out during

The internal cavity of the sub 18. The collar 21, together with the control container and the upper squeeze plug that has entered it, freely fall to the bottom of the well.

The use of the proposed device of a slide valve of circulating holes in step sleeves for cementing, suspensions, packages, etc. allows to significantly reduce the cost of their production by simplifying the design, ensures their more reliable operation and eliminates the need to drill the control details of the gate after it has been triggered. This reduces the initial costs of using these devices, the cost of repair and restoration works in case of failure.

for their work, as well as for drilling solid jumpers in the column

Claims (1)

Invention Formula  The slide valve of the circulation holes of the downhole devices included a body with an axial hole and radial V five 0 five holes, and mounted concentrically relative to each other with the formation of an annular chamber between them, a spool bushing housed in the annular chamber, hollow plugs installed in the housing under the spool bushing, a control plug, a set of split spring rings and a spring ring remover, characterized in that, in order to ensure a uniform axial bore of the housing after the device has tripped, the spool bushing in the upper part is made with an external bore and the casing against the spool bushing is made with morning groove, thrust collar and radial channel in the upper part of the inner groove, with split spring rings installed in the outer groove of the spool bushing and made with grooves on the outer surface, and the puller of the split spring rings installed.in the inner groove of the casing with the possibility of interaction with the grooves of the split spring rings and is made in the form of flat springs, the lower ends rigidly connected to the casing. .