RU2374424C1 - Method and arrangement of insulation for borehole trouble zone using profiled shutter with cylindrical areas - Google Patents

Method and arrangement of insulation for borehole trouble zone using profiled shutter with cylindrical areas Download PDF

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Publication number
RU2374424C1
RU2374424C1 RU2008117950/03A RU2008117950A RU2374424C1 RU 2374424 C1 RU2374424 C1 RU 2374424C1 RU 2008117950/03 A RU2008117950/03 A RU 2008117950/03A RU 2008117950 A RU2008117950 A RU 2008117950A RU 2374424 C1 RU2374424 C1 RU 2374424C1
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Russia
Prior art keywords
overlap
see
sections
profile
hydraulic
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RU2008117950/03A
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Russian (ru)
Inventor
Шафагат Фахразович Тахаутдинов (RU)
Шафагат Фахразович Тахаутдинов
Наиль Габдулбариевич Ибрагимов (RU)
Наиль Габдулбариевич Ибрагимов
Равиль Рустамович Ибатуллин (RU)
Равиль Рустамович Ибатуллин
Габдрашит Султанович Абдрахманов (RU)
Габдрашит Султанович Абдрахманов
Нигаматьян Хамитович Хамитьянов (RU)
Нигаматьян Хамитович Хамитьянов
Анатолий Вениаминович Киршин (RU)
Анатолий Вениаминович Киршин
Руслан Габдрашитович Абдрахманов (RU)
Руслан Габдрашитович Абдрахманов
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Открытое акционерное общество "Татнефть" им. В.Д. Шашина
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Priority to RU2008117950/03A priority Critical patent/RU2374424C1/en
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Abstract

FIELD: oil-and-gas production.
SUBSTANCE: group of inventions related to oil and gas wells drilling and maintenance, particularly to insulation borehole trouble zones. Method includes descending shutter with a shoe into borehole trouble zone on a pipe string, equipped with latch mechanism, widen heading in shape of force plug, installed one on top of another with reduce of diametre in direction of working surface shutter, widening of profiles by creating of hydraulic pressure, drift of cylindrical and calibration of profile areas. Using widen heading during drift and calibration initiate longitudinal displacement from top to the bottom with pushing through shutter applying string and hydraulic jet weight. During anchor unit lifting, hydraulic jet with centraliser relative to widen heading ring blow off inside the pipe sting water using bypass valve. The last after the stutter force plug has a ability to increase its diametre up to working one using hydraulic pressure.
EFFECT: isolation quality increase, accident avoidance.
2 cl, 6 dwg

Description

The invention relates to the drilling and repair of oil and gas wells, in particular, to isolate areas of complication of well drilling.

The well-known "Method of repair of casing strings in wells" (patent RU No.2010945, IPC ЕВВ 29/00, publ. Bull. No. 7 of 04/15/94) by installing metal patches expandable by the mandrel in areas of leakage. a movable hydraulic jack containing hollow hydraulic cylinders and a hollow rod co-axially movable relative to them with annular pistons, rigidly connected with the upper end to the anchor assembly, and the lower end with the loring head. In this case, the patch is fixed between the lower end of the cylinder body and the lorning head.

The disadvantage of this method and device for its implementation is the following:

- with the length of the patch 20 (Fig. 1) equal to several hundred meters, its assembly and descent into the well together with the rod 17 are practically impossible due to the complexity of connecting the corrugated pipes to each other by welding with the simultaneous assembly of the rod 17;

- unreliable fastening of the lower end of the patch, since the corrugated pipe in this place cannot be pressed against the casing, and even more so against the walls of the well, with sufficient interference due to residual elastic deformation, as at the first step of the turning, the patch is pressed only at a length equal to the stroke of the pistons of the hydraulic jack.

Also known are “Method and device for repairing casing strings in a well” (AS No. 976020, IPC Е21В 29/10, publ. Bull. No. 43 of 11/23/82), which can equally be used for isolating complication zones drilling wells with profile shutoffs.

The known method includes lowering the overlap into the zone of leakage of the column (or the zone of complication of drilling) using the installation head, expanding the profile sections of the overlap by creating hydraulic pressure in it, distributing the cylindrical sections using the mandrel.

A device for implementing this method comprises a profile overlap with cylindrical ends, at the ends of which are installed upper and lower anchor assemblies in the form of cones with seals and fixing dies forming a hydraulic chamber with a shutter, as well as gripping and gripping elements, one of which is connected to the cone of the upper anchor node, and the other with the cone of the lower anchor node. In this case, the gripping and gripping elements have protrusions for interacting with the profile part of the overlap. The lower end of the cone of the lower anchor assembly is equipped with a mandrel, and the upper end of the cone of the upper anchor assembly is equipped with a check valve.

The main disadvantages of this method and device for its implementation are the low quality and reliability of overlapping zones of casing leakage or complications of well drilling, especially when the overlap interval reaches several hundred meters. This is a consequence of the fact that when the profile pipes are expanded by hydraulic pressure, the overlap anchors in the casing string or in the wellbore above and below the disturbance or complication interval, and when profile and cylindrical sections are distributed, first from top to bottom, and then from bottom to top, there is an “influx »Metal on threaded connections, respectively, from above and below on threaded connections, which can lead to their depressurization due to the displacement of the sections connected by a thread. Emergencies are also possible in cases of jamming of cones during flaring of a profile overlap. At the same time, when removing the landing tool after installing the shutoff, it is possible to spill liquid on the surface, which worsens the working conditions of workers.

The closest in technical essence and the achieved result to the proposed ones are “Method and device for isolating zones of complications of well drilling” (AS No. 1712581, IPC Е21В 29/10, 33/13, publ. Bull. No. 6 from 02.15.92 g.).

The method carried out using this device includes lowering the overlap, having cylindrical sections and threaded connections, into the zone of drilling complication with the help of installation equipment, expanding the profile sections of the overlap by creating hydraulic pressure in it until their walls are pressed against the walls of the well, distributing cylindrical sections with threaded connections and calibration of profile sections by rolling (see the description of the invention to AS No. 1712581).

The device for isolating the zones of complications of drilling wells (according to the indicated AS) includes a profile shutter with cylindrical sections and threaded connections, a head-turning head consisting of several sections installed stepwise with rolling elements decreasing in diameter towards the side of distribution, mounted at the lower end of the shutter a shoe with a check valve and an element that is captured when it is disconnected from the overlap, and are rigidly interconnected: a gripping element, a locking mechanism and a connection unit with drill pipes.

The main disadvantages of this method and device for its implementation are the low reliability of isolation of the zones of complication of well drilling, due to poor calibration of the swollen profile part of the overlap and low-quality pressing of the cylindrical part of the overlap by flaring, as a result of which the profile parts and cylindrical parts of the overlap are pressed in a spiral, which can lead to jamming bit when lowering it after installing the profile overlap to continue drilling, to the tightness of the thread ovyh Perekryvatel compounds, and sometimes to their degradation due to alternating load reusable. Also, at shallow intervals of drilling disturbances, the weight of the pipes may not be enough to pass the cylindrical parts, which will lead to jamming of the tool and, as a result, to an emergency.

The technical task of the invention is to improve the quality of insulation due to the expansion and calibration of the profile overlap by turning, as well as the elimination of emergency situations due to jamming of the expanding head in the overlap due to the use of a hydraulic jack to increase axial force during the passage of complex sections and the anchor assembly for fixing the tool relative to the walls wells and profile overlap below the already expanded threaded connections.

The technical problem is solved by the method of isolating the zones of complication of drilling a well with a profile overlap with cylindrical sections, including the descent of the overlap with a shoe into the zone of complication on a pipe string equipped with a locking mechanism, an expanding head consisting of several sections mounted on top of each other with decreasing diameter working surfaces in the side of the overlap, the expansion of the profile sections of the overlap by creating hydraulic pressure in it, the distribution of cylindrical and calibration profiles s areas with the help of a spreading head.

New is that the sections of the expanding head, made in the form of punches, which are made with the ability to reduce their diameter when removed from the ceiling, and the last from the ceiling, the punch is also to increase its diameter to working using hydraulic pressure, during distribution and calibration give longitudinal moving from top to bottom with pushing through the shutter with the weight of the pipe string, and in areas requiring additional effort, for example, when distributing and calibrating cylindrical sections, with a hydraulic jack, otorrhea connected on top with the anchor node, configured to interact with the walls of the well and Perekryvatel, and bottom - with a hydraulic centering, and when lifting the anchor assembly, hydraulic jack with hydraulic centering the head relative dorniruyuschey vented fluid within the pipe string by means of the overflow valve.

The technical problem for the implementation of the method is also solved by a device comprising a profile overlap with cylindrical sections and threaded connections, mounted on the lower end of the overlap shoe with a check valve and a fishing head at the top, an expanding head, consisting of several sections mounted on top of each other with decreasing diameter workers surfaces to the side of the overlap, and containing on top the connection node with the pipe string, and below the locking mechanism, hermetically connected to the upper Tzom Perekryvatel, catcher beneath fishing head shoe.

New is that it additionally contains an anchor assembly, consisting of upper and lower sections and made with the possibility of interaction with the walls of the well or profile overlap with increasing internal pressure, and a hydraulic jack installed sequentially below lower, consisting of coaxially connected hollow pistons and cylinders, a hydraulic centralizer and a bypass valve located above the expansion head, the sections of which are made in the form of punches with decreasing from section to section towards the overlap maximum working diameters, each punch made of a casing with a central channel and rails expanding from the overlap, on which, with limited displacement, dorning inserts are installed, supported by a pusher from the bottom of the overlap, and a cylinder connected to the central channel of the casing is located on the latter’s body from the punch overlap with an annular piston interacting from above with a pusher and made with the possibility of limited axial movement when calibrated the load due to the clamp, and on the body of the other mandrels there are compression springs, each resting on its bottom from the stop, and on top - on the pushers, while the bypass valve is made in the form of a hollow body sleeve with cylindrical constriction and a hollow rod inserted telescopically with limited movement in case sleeve and equipped with a bottom nipple hermetically interacting with the cylindrical narrowing of the case sleeve, and the nipple is equipped with a check valve that blocks its passage channel, higher back of the nipple valve, radial holes are made that can be tightly sealed by an annular restriction while moving the rod downward relative to the body sleeve, the annular narrowing of which is equipped with channels communicating the internal cavity of the body sleeve above the annular narrowing with the internal cavity under the annular narrowing, while the body sleeve and the stem are connected respectively, with the housing of the upper section of the mandrel head and a hydraulic centralizer.

Figure 1 shows the upper part of the device.

Figure 2 shows the middle part of the device.

Figure 3 shows the lower part of the device with partial longitudinal and transverse sections.

Figure 4 shows the last punch from the overlapper with a partial longitudinal section.

Figure 5 shows a bypass valve with a partial longitudinal section.

Figure 6 shows the locking mechanism (enlarged).

A device for isolating drilling complication zones (not shown) of a well (not shown) with a profile block 1 (see Fig. 3) with cylindrical sections 2 includes a profile block 1 with cylindrical sections 2 and threaded connections 3 in these sections for a tight connection to each other, installed on the lower end of the overlap 1 shoe 4 with a check valve 5 and a fishing head 6 at the top, expanding head 7 (see figure 2), consisting of several sections 7 ', 7' 'and 7' '', mounted one above the other with decreasing diameter working 8 and the surfaces of the side profile liner 1 (see FIG. 3), and comprising a top connection node 9 (see FIG. 1) from the pipe string and below locking mechanism 10 (see FIG. 3 and 6). hermetically connected to the upper end of the overlap 1 (see figure 3), with the catcher 11 below for the fishing head 6 of the shoe 4. The device further comprises an anchor assembly 12 (see figure 1), consisting of the upper 13 and lower 14 sections connected a pipe string 15 (consisting, for example, of heavy drill pipe (UBT)), and configured to interact with the walls of the well (not shown) or a profile breaker 1 (see FIG. 3) with increasing internal pressure, and a hydraulic jack installed sequentially below 16 (see figure 2), consisting of a compound coaxially hollow pistons and cylinders (not shown in FIG. 2), a hydraulic centralizer 17 and an overflow valve 18 located above the upper section 7 ″ of the expansion head 7. Moreover, sections 7 ′, 7 ″ and 7 ″ of the expansion head 7 are made in the form of punches with decreasing from section 7 ″ ″ sequentially to section 7 ’in the direction of the overlap with corresponding working maximum diameters: d3> d2> d1.

Each punch 7 ', 7' 'and 7' '' is made of a housing 19 (see Fig. 4) with a central channel 20 and guides 21 expanding from the overlap, on which the cutting inserts 22 are mounted with limited movement, supported from below by the pusher 23 On the body 19 of the last from the overlap 1 (see FIG. 3) of the 7 ″ ”punch (see FIG. 2), a cylinder 24 (see FIG. 4) is placed, connected with the central channel 20 of the housing 19 by a channel 25, with an annular a piston 26, interacting from above with a pusher 23 and made with the possibility of limited axial movement with tar Rowan load due to detent 27, or configured of a ring of dense material 27 (e.g., made of rubber or polyurethane), or spring-loaded balls from the housing or any known construction (not shown in Figure 4). On the housing 19 of the remaining mandrels 7 '' (see Fig. 2) and 7 ', compression springs (not shown in Fig. 2) are placed, each resting on its bottom on an abutment (not shown in Fig. 2), and on top - on pushers 23.

The bypass valve 18 (see Fig. 2) is made in the form of a hollow body sleeve 28 (see Fig. 5) with a cylindrical constriction 29 and a hollow shaft 30 inserted telescopically with limited movement in the body sleeve 28 and equipped with a bottom nipple 31, hermetically interacting with the cylindrical narrowing 29 of the housing sleeve 28. The nipple 31 is equipped with a check valve 32 that overlaps the passage channel 33 of the nipple 31. Radial holes 34 are made above the valve 32 of the nipple 31, which can be sealed by an annular narrowing of 29 p and moving the rod 30 downward relative to the housing sleeve 28. The annular narrowing 29 is equipped with channels 35 communicating the internal cavity 36 of the housing sleeve 28 above the annular narrowing 29 with the internal cavity 37 under the annular narrowing 29. The housing bushing 28 and the stem 30 are connected by corresponding threads 38 and 39 sec hydraulic centralizer 17 (see figure 2) and the housing 19 (see figure 4) of the punch 7 '' '(see figure 2).

Seals 40, 41, 42 (see FIG. 4), 43, 44 and 45 (see FIG. 5) exclude unauthorized fluid flows in the device. In this case, the upper and lower sections of the profile overlap 1 (see Fig. 3) between the cylindrical sections 2 can be equipped with external sealing collars 46 and 47, respectively, to improve the isolation of the zones of complication of drilling the wells.

The method is implemented in the following sequence.

Profile overlap 1 (see Fig. 3) is assembled at the wellhead, fixing the shoe 4 below, cylindrical sections 2 screwed by threaded joints 3. Moreover, the fishing head can be made of any known design, for example: in the form of a hollow sleeve with external annular grooves (see Fig. 3) or internal annular grooves (not shown in Fig. 3). After that, the profile overlap 1 (see Fig. 3) is fixed at the wellhead and the locking mechanism 10 is inserted into it, made, for example, in the form of an external groove 48 (see Fig. 6) on the lower part of the hollow sleeve fixed in the inner protrusion 49 the upper end of the profile overlap 1 (see figure 3). In this case, the sealing of the locking mechanism is provided by a seal 50 (see FIG. 6), and the catcher 11 (see FIG. 3) interacts with the lower end with the upper narrowing of the profile overlap 1, excluding longitudinal backlashes. Moreover, the catcher 11 can be made of any known design, for example: in the form of a collet (not shown in Fig. 3) with external or internal protrusions under the corresponding grooves of the fishing head 6 or in the form of a spring ring located inside the catcher (see Fig. 3) or outside (not shown in FIG. 3), under the corresponding grooves of the fishing head 6. Above the locking mechanism 10, punches 7 ′ (see FIG. 2) and 7 ″ are installed with springs pressing down the insert inserts 22 relative to the housing through the pushers 23 19, ensuring their maximum the working diameter d1 and d2, and the punch 7 ″, the piston 26 (see FIG. 4) and the pusher 23 together with the turning inserts 22 of which are previously moved downward relative to its body 19 to reduce the outer diameter and to exclude the interaction of the turning inserts 22 this punch 7 '' '(see figure 2) with the walls of the well. Above the punch 7 ″, a bypass valve 18 is placed, which is connected with the corresponding threads 39 (see FIG. 5) and 38 to the corresponding body 19 (see FIG. 4) of the punch 7 ″ (see FIG. 2) and hydraulic centralizer 17. Then, from above, a hydraulic jack 16, lower 14 (see Fig. 1) and upper 13 sections of the anchor assembly 12, as well as the connection unit 9 (see Fig. 1) with the pipe string 51 (drill pipes) are sequentially connected to the hydraulic centralizer 17 (BT) and / or UBT, depending on the required weight of the pipe string 51).

The hydraulic centralizer 17 (see figure 2) can be made of any design with rounded dice 52 on the surface, interacting with the walls of the well or with the inner surface of the overlap 1 (see figure 3) with sliding with increasing internal pressure. For example, the dies 52 (see FIG. 2) can be made in the form of radially spring-loaded pistons inserted into the centralizer 17. The hydraulic jack 16 can also be of any design, the pistons and cylinders (not shown in FIG. 2) which move apart with increasing the pressure inside the hydraulic jack 16. And the anchor assembly 12 (see figure 1) consists of sections 13 and 14 connected by a pipe string 15, and the sections can be of any design with dies 53, which are fixed with increasing internal pressure with the walls of the well or profile overlap one (see figure 3). The design of the hydraulic jack 17 (see figure 2) and sections 13 (see figure 1) and 14 of the anchor assembly 12 can be performed similarly to the hydraulic jack and its anchor assembly described in patent RU No. 2282708 (see Bull. No. 24 from 27.08. 2006). The implementation of the anchor node 12 (see figure 1) of sections 13 and 14 allows for guaranteed fixation of the anchor node 12 relative to the walls of the well, since when working in an open trunk it is possible to find a cavity (not shown in figure 1) opposite one of the sections 13 (see Fig. 1) or 14, then section 14 or 13 provides the fixation. The length of the pipe string 15 is chosen after examination by geophysical instruments so as to minimize the likelihood of the location of both sections 13 and 14 against cavities in the borehole walls simultaneously.

After the device is assembled, it is connected by the connection unit 9 (for example, a female thread coupling) to the pipe string 51 (drill pipes (BT) and / or UBT, depending on the required total weight of the device for turning and calibration of profile sections of the overlap 1 (see Fig. .3)), on which the profile overlap 1 is lowered into the installation interval. In this case, the liquid through the check valve 5 of the shoe 4, the profile shutoff 1, the locking mechanism 10, the central channels 20 (see FIG. 4) of the punches 7 (see FIG. 2), 7`` and 7 '' ', the internal cavity 37 (see Fig. 5) d annular narrowing 29 of the hollow body sleeve 28 of the bypass valve 18 (see figure 2), channels 35 (see figure 5) of the annular narrowing 29 and the check valve 32, the inner cavity 36 of the housing sleeve 28, the radial holes 34 and the passage channel 33 the nipple 31, the hydraulic centralizer 17 (see figure 2), the hydraulic jack 16 and the anchor assembly 12 (see figure 1) fills the pipe string 51. After reaching the interval of isolation of the zones of complications of drilling the well in the pipe string 51 create excess pressure, which through anchor assembly 12, hydraulic jack 16 (see figure 2), the centralizer 17, the bypass valve 18 (through its passage channel 33 (see figure 5) and the radial holes 34 and the nipple 31, as well as the channels 35 of the annular narrowing 29), the Central channels 20 (see figure 4 ) punches 7 '(see figure 2), 7' 'and 7' '' and the locking mechanism 10 (see figure 3) is fed into the profile overlap 1. As a result, the check valve 5 of the shoe 4 closes, the profile sections of the overlap 1 straighten before interaction and preliminary fixation with the walls of the well, and in the outermost from the profile overlap 1 (see figure 3) the punch 7 '' '(see figure 2) through the channel 25 (see Fig. 4) from the central channel 20 of the housing 19, excess pressure is transferred to the cylinder 24, moving the annular piston 26 with the pusher 23 upward, overcoming the resistance of the latch 27 and moving the cutting inserts 22 along the guides 21. As a result, the cutting pliers insert 22 7 '' '(see Fig. 2) become with a maximum working diameter d3. This also leads to the fact that the lower end of the catcher 11 (see figure 3) is freed from interaction with the upper narrowing of the profile overlap 1 and when unloading the device with a pipe string 51 (see figure 1) under their weight, the inner protrusion 49 (see Fig. 6) the upper end of the profile overlap 1 (see Fig. 3) expands and the device gradually moves inside the overlap 1. At the same time, in the bypass valve 18 (see Fig. 2), the hollow stem 30 (see Fig. 5) the nipple 31 moves downward relative to the housing sleeve 28, and its cylindrical narrowing 29 is hermetically closed there are radial holes 34 of the nipple 31. As a result, upon further descent, the filling of the pipe string 51 (see Fig. 1) is in the bypass valve (see Fig. 2) through its check valve 32 (see Fig. 5), which when increasing pressure in the pipe string 51 (see figure 1) overlaps the passage channel 33 (see figure 5) of the nipple 31, increasing the internal pressure in sections 13 (see figure 1) and 14 of the anchor assembly 12, the hydraulic jack 16 (see figure 2), a hydraulic centralizer 17.

Further, after entering the profile overlap 1 (see FIG. 1), punches 7 ′ (see FIG. 2), 7 ″ and 7 ″ ”are reduced in diameter by the working surfaces 8 towards the overlap 1 (see FIG. 1) and decreasing from the 7 ″ ’punch (see FIG. 2) sequentially to the punch 7’ toward the overlap with the corresponding working maximum diameters d3> d2> d1, they sequentially reverse and calibrate the profile part of the overlap 1 under the weight of all the equipment (see FIG. 3).

In sections of the profile overlap 1, requiring additional effort, for example, when distributing and calibrating cylindrical sections 2 or collapse (not shown in Fig. 3), the pipe string 51 is unloaded on them (see Fig. 1). As a result, the cylinders and pistons of the hydraulic jack 16 (see figure 2) are shifted, moving the hydraulic jack in the working position. Then, overpressure is created in the pipe string 51 (see FIG. 1), which first, due to the axial load from the drill collar, pushes the dies 53, fixing sections 13 and 14 relative to the walls of the well or profile overlap 1 (see FIG. 3), dies 52 (see figure 2), centering the punches 7 ', 7' 'and 7' '' relative to the walls of the well or profile overlap 1 (see figure 3) below its cylindrical sections 2, which are already retracted, and then extends the cylinders and pistons of the hydraulic jack 16 (see Fig. 2), turning and calibrating with punches 7 '(see Fig. 2), 7' 'and 7' '' of the expansion head 7 these sections profile liner 1 (see FIG. 3). This operation is repeated for turning and calibration of all such sections of the profile overlap 1.

In sections of the profile overlap 1, where additional effort is not required, the turning and calibration by punches 7 '(see Fig. 2), 7' 'and 7' '' is made by pushing them under the weight of the pipe string 51 (see Fig. 1) through profile overlap 1 (see figure 3).

When the locking mechanism 10 reaches the shoe 4, the catcher 11 seals the head 6 of the shoe 4 leakingly. Then, with the punches 7 ′ (see FIG. 2), 7 ″ and 7 ″, the lower part of the profile overlap 1 is turned and calibrated (see FIG. 3) pushing the weight of the pipe string 51 (see figure 1) or using a hydraulic jack 16 (see figure 2).

Then the shoe 4 (see figure 3), the locking mechanism 10, the expanding head 7 (see figure 2) with the bypass valve 18, the centralizer 17, the hydraulic jack 16 and the anchor unit 12 (see figure 1) on the pipe string 51 are removed from the well. In this case, the hollow stem 30 (see Fig. 5) of the bypass valve 18 (see Fig. 2) with the nipple 31 (see Fig. 5) will move upward relative to the housing sleeve 28. As a result, the radial holes 34 of the nipple 31 will open, freeing themselves from annular narrowing 29 of the housing sleeve, allowing you to drain (drain) the liquid from the pipe string 51 (see figure 1) and the device through the passage channel 31 (see figure 5) of the hollow rod 30, radial holes 34 of the nipple 31, the inner cavity 37 under annular narrowing 29 with channels 35 and the inner cavity 36 of the housing sleeve 28 above the annular narrowing 29 waist sleeve 28 of the bypass valve 18 (see FIG. 2).

In the interaction of the punches 7 '(see figure 2), 7' 'and 7' '' with the walls of the well (for example, when shedding rock), the turning inserts 22 (see figure 4) with the pushers 23, overcoming, respectively, the efforts of the springs and the annular piston 26, interacting with the latch 27, move along the guides 21 downward, reduce their maximum diameter, respectively, d1 (see figure 2), d2 and d3. Due to this, punches 7 ', 7' 'and 7' '' freely pass these sections when lifting without jamming the device and emergency situations. After passing through such sections at the farthest punch 7 ″ from the profile overlap 1 (see FIG. 3) and having the largest maximum working diameter d3 (see FIG. 2), the turning inserts 22 (see FIG. 4) remain in the lower position, reducing the maximum diameter of the entire device and facilitating its removal from the well, and for the remaining punches 7 '(see Fig. 2), 7' 'the turning inserts 22 are returned to the upper position under the action of the springs.

This invention improves the quality of isolation of the zones of complication of drilling a well with a profile cutter with cylindrical sections due to the expansion and calibration of the profile cutter by drilling, as well as by eliminating emergencies due to jamming of the expanding head in the cutter, due to the use of the anchor assembly for fixing the device relative to the well walls or a blocker and a hydraulic jack to increase the axial force during the passage of complex sections during expansion and calibration of philous Perekryvatel.

Claims (2)

1. The method of isolating the zones of complication of drilling a well with a profile overlap with cylindrical sections, including the descent of the overlap with a shoe into the complication zone on a pipe string equipped with a locking mechanism, an expanding head consisting of several sections mounted one above the other with decreasing diameter work surfaces to the side the overlap, the expansion of the profile sections of the overlap by creating hydraulic pressure in it, the distribution of the cylindrical and calibration of the profile sections using the expansion the head, characterized in that the sections of the expanding head, made in the form of punches, which are installed with the ability to reduce their diameter when removed from the shutter, and the last from the shutter, the punch is also to increase its diameter to working using hydraulic pressure, when distributing and calibrating they give longitudinal movement from top to bottom by pushing through the cutter with the weight of the pipe string, and in areas requiring additional effort, when distributing and calibrating cylindrical sections, a hydraulic house an atom that is connected at the top with an anchor assembly configured to interact with the walls of the well and a profile shutter, and at the bottom with a hydraulic centralizer, and when lifting the anchor assembly, a hydraulic jack with a hydraulic centralizer relative to the expanding head, bleed fluid inside the pipe string using a bypass valve .
2. A device for isolating zones of complication of drilling a well with a profile overlap with cylindrical sections, including a profile overlap with cylindrical sections and threaded connections, mounted on the lower end of the overlap shoe with a check valve and a fishing head at the top, an expanding head consisting of several sections mounted on top of each other with decreasing diameters of the working surfaces in the direction of the overlap, and containing on top the connection node with the pipe string, and below - the locking bellows ISM, tightly connected to the upper end of the overlap, with a catch below the catch head of the shoe, characterized in that it further comprises an anchor assembly consisting of upper and lower sections and configured to interact with the walls of the well or profile overlap with increasing internal pressure, and sequentially installed below the hydraulic jack, consisting of coaxially connected hollow pistons and cylinders, a hydraulic centralizer and a bypass valve located above the expansion head, sections of which are made in the form of punches with working maximal diameters decreasing from section to section towards the overlapper, each punch made of a housing with a central channel and guides expanding from the overlap, on which, with limited movement, dormer inserts are mounted, supported from below by means of a pusher, moreover, a cylinder with an annular piston communicating with the central channel of the housing is located on the housing of the latter from the punch blocker, interacting at the top with a pusher and made with the possibility of limited axial movement with a calibrated load due to the clamp, and on the bodies of the remaining punches there are compression springs, each resting on its bottom from the bottom, and on the pushers from above, while the bypass valve is made in the form of a hollow body sleeve with a cylindrical constriction and a hollow rod inserted telescopically with the possibility of limited movement into the housing sleeve and equipped with a bottom nipple hermetically interacting with a cylindrical narrowing to of the sleeve, the nipple being equipped with a non-return valve blocking the passage channel, above the non-return valve, radial holes are made in the nipple that can be sealed by annular narrowing when the rod moves downward relative to the housing sleeve, the annular narrowing of which is equipped with channels communicating the internal cavity of the housing sleeve above the annular narrowing with the internal cavity under the annular narrowing, while the body sleeve and the rod are connected respectively to the housing of the upper section of the expansion cleaning head and hydraulic centralizer.
RU2008117950/03A 2008-05-04 2008-05-04 Method and arrangement of insulation for borehole trouble zone using profiled shutter with cylindrical areas RU2374424C1 (en)

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Cited By (19)

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RU2459927C1 (en) * 2011-03-18 2012-08-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for supporting incompetent rocks at extended areas of well bores
RU2465435C1 (en) * 2011-06-09 2012-10-27 Общество с ограниченной ответственностью "Пакер" Device for sealing casing string
RU2483190C1 (en) * 2011-12-12 2013-05-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for isolation of troublesome zones when drilling wells with shaped shutter with cylindrical sections
RU2487231C1 (en) * 2012-07-27 2013-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for open hole division into separate sections
RU2495220C2 (en) * 2012-02-27 2013-10-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Hydraulic jack anchor for installation of profiled shutter in well
RU2521241C1 (en) * 2013-03-29 2014-06-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Hydraulic jack for installation of shutter in well
RU2522360C1 (en) * 2013-03-29 2014-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for installation of profile packer in well
RU2522326C1 (en) * 2013-03-26 2014-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device to isolate problematic zones by profile packer with cylindrical sections at well drilling
RU2531076C1 (en) * 2013-06-24 2014-10-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for isolation of troublesome zones when drilling wells and detecting faults in casing strings with shaped shutter with cylindrical sections
RU2531961C1 (en) * 2013-07-18 2014-10-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for isolation of well drilling problems zones by shutter with cylindrical sections
RU2560035C1 (en) * 2014-07-03 2015-08-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Bypass valve
RU2564321C1 (en) * 2014-09-22 2015-09-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Separation method of horizontal well into individual sections
RU2584484C1 (en) * 2015-04-21 2016-05-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for lowering and installation of profile shutter in well
RU170082U1 (en) * 2016-07-14 2017-04-13 Общество с ограниченной ответственностью "Пласт Инжиниринг" Threaded connection of plasters of the system of elimination of losses of casing
RU2618546C1 (en) * 2016-03-03 2017-05-04 Публичное акционерное общество "Татнефть" им. В.Д. Шашина Device for isolating problematic zones by profile shutter with cylindrical sections at well drilling
RU2639006C1 (en) * 2017-03-28 2017-12-19 Общество с ограниченной ответственностью "Пласт Инжиниринг" Device for restoration of defective sections of production strings of oil and gas wells with controlled cone-transformer
RU2644959C1 (en) * 2017-01-25 2018-02-15 Общество с ограниченной ответственностью "Научно-производственное предприятие "РостТех"" Device for restoration of defects of operating columns of oil and gas wells
RU177288U1 (en) * 2017-07-21 2018-02-15 Публичное акционерное общество "Татнефть" имени В.Д. Шашина bypass valve
RU2648383C1 (en) * 2017-05-26 2018-03-26 Акционерное общество "Татарский научно-исследовательский и проектно-конструкторский институт нефтяного машиностроения" (АО "ТатНИИнефтемаш") Relief valve

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459927C1 (en) * 2011-03-18 2012-08-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for supporting incompetent rocks at extended areas of well bores
RU2465435C1 (en) * 2011-06-09 2012-10-27 Общество с ограниченной ответственностью "Пакер" Device for sealing casing string
RU2483190C1 (en) * 2011-12-12 2013-05-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for isolation of troublesome zones when drilling wells with shaped shutter with cylindrical sections
RU2495220C2 (en) * 2012-02-27 2013-10-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Hydraulic jack anchor for installation of profiled shutter in well
RU2487231C1 (en) * 2012-07-27 2013-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for open hole division into separate sections
RU2522326C1 (en) * 2013-03-26 2014-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device to isolate problematic zones by profile packer with cylindrical sections at well drilling
RU2521241C1 (en) * 2013-03-29 2014-06-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Hydraulic jack for installation of shutter in well
RU2522360C1 (en) * 2013-03-29 2014-07-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for installation of profile packer in well
RU2531076C1 (en) * 2013-06-24 2014-10-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Method and device for isolation of troublesome zones when drilling wells and detecting faults in casing strings with shaped shutter with cylindrical sections
RU2531961C1 (en) * 2013-07-18 2014-10-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for isolation of well drilling problems zones by shutter with cylindrical sections
RU2560035C1 (en) * 2014-07-03 2015-08-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Bypass valve
RU2564321C1 (en) * 2014-09-22 2015-09-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Separation method of horizontal well into individual sections
RU2584484C1 (en) * 2015-04-21 2016-05-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for lowering and installation of profile shutter in well
RU2618546C1 (en) * 2016-03-03 2017-05-04 Публичное акционерное общество "Татнефть" им. В.Д. Шашина Device for isolating problematic zones by profile shutter with cylindrical sections at well drilling
RU170082U1 (en) * 2016-07-14 2017-04-13 Общество с ограниченной ответственностью "Пласт Инжиниринг" Threaded connection of plasters of the system of elimination of losses of casing
RU2644959C1 (en) * 2017-01-25 2018-02-15 Общество с ограниченной ответственностью "Научно-производственное предприятие "РостТех"" Device for restoration of defects of operating columns of oil and gas wells
RU2639006C1 (en) * 2017-03-28 2017-12-19 Общество с ограниченной ответственностью "Пласт Инжиниринг" Device for restoration of defective sections of production strings of oil and gas wells with controlled cone-transformer
RU2648383C1 (en) * 2017-05-26 2018-03-26 Акционерное общество "Татарский научно-исследовательский и проектно-конструкторский институт нефтяного машиностроения" (АО "ТатНИИнефтемаш") Relief valve
RU177288U1 (en) * 2017-07-21 2018-02-15 Публичное акционерное общество "Татнефть" имени В.Д. Шашина bypass valve

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