Sharifov's packer system (versions)

FIELD: oil and gas production.

SUBSTANCE: group of inventions is related to oil and gas production industry, in particular, to packer systems used to separate annular and tubular spaces of well. Packer system comprising hydraulic packer and anchor, for well with conventional external diametre of shaft of 140-146 mm. Packer comprises shaft, adjusting nut, sealing ferrules, which are installed either on nozzle or shaft, shear screws, hydraulic cylinder-piston, anchoring device of hydraulic action. The latter comprises cone with plates and plate holder, is arranged with the possibility of rest against shaft collar, and is connected to shaft by shear screws. Packer shaft is connected to anchor by upper tube thread. In order to provide for throughput diametre of small packer system within the limits from 55 to 62 mm, provided that dangerous section along shaft body is maintained as at least 7 cm, packer shaft is made, depending on its selected throughput diametre, either with upper and lower combined tubular threads - drilling with end H 60 extended outside and tubing stings 73, smooth or extended, or with upper and lower identical tubular threads - drilling with end H 60 extended outside, or with upper and lower identical tubular threads - tubing strings 73, smooth or extended.

EFFECT: provides for relative high throughput diametre of packer for well with shaft diametre of 140-146 mm, and also improved reliability and efficiency of simultaneous-split operation for producing injection and piezometric wells.

2 cl, 3 ex, 9 dwg

 

The invention relates to the oil and gas industry and can be applied to odnopikselnoj and downhole multi-pack composition, including for dual use (DCP), namely mining (OSA), discharge (ARD) or piezometric (PPR) wells, with the purpose of uncoupling between the annulus and in-line spaces and/or the perforation intervals of layers of one well and control the parameters of the different layers.

Known as an analogue for option 1 packer separating unit for operation of the reservoir wells (Patent RU 2305170 C2, publ. 20.10.2005, only 43 S., paragraph 8 PHI, 1, 6, 8, 10, 11, 12), comprising placed in the wellbore on a string of pipe having an open or plugged lower end, one or more downhole cameras with removable valves for flow of produced or injected environment nipple for removable valve and several packers placed above and between the layers, and at least one of the packers made hydraulically operated and is connected to one or more of the elements: anchor fired from pipe and/or annular - pedacinho excess pressure; telescopic connection; a disconnect switch; a shank; a pump. Packer hydraulic action consists of one or not is how many parts of the barrel with internal bores, the outer grooves and the radial holes of the cylinder, forming a barrel with a hydraulic chamber connected with the cavity of the barrel through the radial holes, anchor nuts, cuffs, rings, cones dice and plashkoderzhatelya associated with the barrel of shear screws, and the packer or made with the possibility of temporary failure from a given internal pressure, or can be released as a mechanical impact due to cutting shear screws and hydraulic impact to reduce the load on the column pipe.

Introduction packer separating installation - non-unified multi-pack assemblies SH-2G/1M-73/60-122-350-25 for wells with a nominal outside diameter of the barrel 140 and 146 mm at the fields Yuganskneftegaz and Purneftegaz showed that with the use of such packers-pass (50 mm) malarkodi downhole camera KT-60 (passage 48 mm)deployed on relatively nizkoplotnykh the fiberglass pipe-60G, reduced reliability of landing packers and increases the degree of accidents during landing and extracted from the wells, and complicated cable operations during the descent of underlying instruments and tools because of the small bore diameter as packers and pipe tubing-60 G

Known as a prototype for option 1 compact hydraulic packers to anchor the m type PD-YAGAMI and PD-YAGAMI (Yevseyev and other Reference manual for gas-lift method of operation of the wells. - M.: Nedra, 1984. - 360 C., 40, 41, tab; Urabulabula and other Drilling equipment: Reference: 2 so Vol.2. Drilling tools. - M.: JSC "Publishing house "Nedra", 2003, str, 11, 24). These compact hydraulic packers PD-YAGAMI and PD-YAGAMI with outer diameters 118 and 122 mm bore with an outer diameter of the barrel 140 and 146 mm include the barrel made from steel billets, and his carving is made from top and bottom of the smooth thread tubing tubing 60 according to GOST 633-80, adjusting nut, sealing lip with an outer diameter less than the overall diameter of the packer installed directly on the trunk or on the socket associated with the hollow body of the anchor, shear screws, hydraulic cylinder-piston forming with the barrel ring cavity associated with the cavity of the barrel through the radial hydraulic channels, zakalivayuschie device hydraulic action, consisting of a cone with dice and plashkoderzhatelya with the screw holes made with emphasis on the shoulder of the barrel and connected with the shaft shear screws installed in the threaded holes plashkoderzhatelya, the barrel bottom is connected with a Shoe equipped with a shear valve, and the top anchor, which is triggered either from the pipe (PD-YAGAMI), or from the annular - podacima what about the (PD-YAGAMI) excess pressure and is at least one hollow body, equipped with a nut, straps and spring-loaded dice placed in its radial holes straps.

One of the drawbacks of prototypes packers PD-YAGAMI and PD-YAGAMI is that they do not require the use of anchors that are fired from the tube, and annular - pedacinho excess pressure, which reduces their reliability in the process of planting and work.

The main disadvantage of packers PD-YAGAMI with overall diameters 118 and 122 mm, limiting their sizes up to 50 mm while maintaining the critical section not less than 7 cm2on their thread, is that their trunks are made from billet upper and lower pipe threads as thread tubing tubing 60 according to GOST 633-80. The lower thread tubing 60 (GOST 633-80) stem connected with the top of the Shoe shear valve made without the lower thread, and the upper pipe thread tubing 60 is connected with the internal thread of the coupling or sub anchors. For these packers only clutch or subs anchors made with the top pipe thread tubing tubing 73 according to GOST 633-80. Therefore, the trunks with the threads of the tubing 60 is not allowed to pass through the packers cable and geophysical instruments or appliances with diameter exceeding 50 mm, for This reason, in turn, does not allow layouts ARD and Ordpt known small-sized hydraulic packers (diameter 118, 122 mm) to apply downhole camera with reduced diameter 59 mm (for example, KT-73 and KVM - 73), lowered into the well on a string of pipe tubing 73, as for landing and retrieving removable valves (regulators, instruments, gauges) of the hollow side pockets downhole cameras CT-73 or KVM - 73 used cable tool "console diverter ACS-73" outer diameter 54 - 56 mm

Known as analogue option 2 hydromechanical or mechanical packer (Yevseyev and other reference manual gas-lift method of operation of the wells. - M.: Nedra, 1984. - 360 C., 38, 39), consisting of a barrel, is made with upper and lower pipe threads, sealing sleeves, and under them saarialho device, respectively, hydraulic or mechanical type, consisting of a cone with dice and plashkoderzhatelya. These packers hydromechanical or mechanical, but does not support actions, as they consist of one solid trunk, from which they cannot be used as a packer focusing its trunk in the bottom of a well or below the set packer (for example, in the well with a multi-pack arrangement ARD or ORD). That is, when creating an axial load from the weight of the column of pipes) on these packers their trunk to move down will not be as they are through the shank (tubing) tightly abuts the shaft SC is ageny or planted on the lower packer. For actuation of such packers need to have their trunks were free, that is, the bottom should not have any stops.

Known as a prototype for option 2, packer separating unit for operation of the reservoir wells (Patent RU 2305170, publ. 20.10.2005, only 43 S., paragraph 32 PHI, 1, 16), comprising placed in the wellbore on a string of pipe having an open or plugged lower end, one or more downhole cameras with removable valves for flow of produced or injected environment nipple for removable valve and a few mechanical packers placed above and between the layers, and at least one of the mentioned mechanical packers connected to one or more of the elements: anchor fired from pipe pressure, a telescopic connection, disconnector; shank and pump. Mechanical anchor maker consists of a telescopic tube, consisting of two interconnected parts, with an outer collar or emphasis, adapter, o-rings and seals, casing with threaded radial holes for shear screws and tip, while the outside of the adapter installed in the adjusting nut with the possibility of changing the free motion of the sealing sleeves and exceptions escaping the top of them during its deformation and cover the top polupotemochnymi cuffs made with the possibility of exceptions escaping the bottom of them, moreover, the outer diameter of the adjusting nut not less than the outer diameter of the casing, and the latter, in turn, greater than the diameter of sealing collars, in addition, the barrel and the casing is made can be locked relative to each other, while in the well every mechanical packer is set free or focusing underneath the shank on the bottom freely mounted mechanical packer, or on the bottom, or at anchor, or the collar of the borehole. Despite the fact that in this setting, the mechanical anchor packer is made with a telescopic tube, consisting of two interconnected parts, but he does not have the seal of mechanical or hydraulic saarialho device for alignment of the packer, and to transmit a certain axial force at landing packer is not on the shank of the tubing so as to avoid its deformation), namely in the trunk (production casing) well, this is not the packer provides for the use of anchors, also triggered from the annular - pedacinho excess pressure, which decreases the reliability and integrity in the process.

The aim of the invention is the provision of a relatively larger bore diameter of the small-packer system (e.g., diameter 118, 122 mm, etc.) for wells with a nominal outer diameter of STV is 140 or 146 mm, in addition, improving the reliability and efficiency as hydraulic packers and mechanical support of the packers, as well as multi-pack configurations DC in wells without limitation of the diameter of the trunk (production casing), namely in the extractive (OSA), discharge (ARD) and piezometric (PPR) wells.

Technical and positive effect from the use of a packer system is:

in achieving the bore diameter from 55 to 62 mm compact hydraulic packers (for example, with a diameter of 118, 122 mm etc), without compromising their reliability and, accordingly, packer layouts for wells with a nominal outer diameter of 140 or 146 mm;

- to improve the reliability and efficiency of the mechanical anchor packer by equipping its mechanical or hydraulic zakrivaem device, and an anchor fired from pipe and/or annular - pedacinho excess pressure;

in the reduction of complications, the number of accidents during landing and retrieving packers, in-depth research and the cable operations and, accordingly, to reduce their capital repair for emergency response;

- increased service life as packers and configurations of the wholesale electricity market and, accordingly, increase time between wells and the extraction fluid.

Option 1. Packer system consists of hydrauli the definition of packer and anchor for wells with a nominal outside diameter of the barrel 140-146 mm, the first of which includes the barrel in one piece or of several rigidly connected parts, is made with upper and lower pipe threads, adjusting nut, sealing lip with an outer diameter less than the overall diameter of the packer installed either on the pipe tightly associated with the hollow body of the hydraulic anchor or directly on the barrel, shear screws, hydraulic cylinder-piston forming with the barrel ring cavity associated with the cavity of the barrel through the radial hydraulic channels, zakalivayuschie device hydraulic action, consisting of a cone with dice and plashkoderzhatelya with the screw holes made with emphasis on the shoulder of the barrel and associated with the barrel of shear screws installed in the threaded holes plashkoderzhatelya, the packer upper pipe thread connected to the anchor fired from pipe and/or annular - pedacinho excess pressure, comprising, at Merey, from one of the hollow casing, equipped with a nut, pipe or without straps and spring-loaded dice placed in its radial holes straps.

The purpose of the invention by variant 1 is achieved by the fact that in order to ensure the passing of the small diameter packer system (e.g., diameter 118, 122 mm, etc.) in PR the cases from 55 to 62 mm, while maintaining the dangerous section of the body (namely, the threaded) barrel not less than 7 cm2the packer is made depending on its flow diameter, or with the upper and lower combined pipe threads - drill planted out by the late H 60 according to GOST standard 631-75 (where the average diameter of the thread in the main plane of the d*cf=65,576 mm) and tubing smooth (where d*cf=71,089 mm) or planted (where d*cf=76,848 mm) tubing 73 according to GOST 633-80, or with the top and bottom of the same pipe threads - drill planted out by the end of n, or with the top and bottom of the same pipe threads - tubing smooth or planted tubing 73.

Option 2. Packer system consists of a mechanical anchor packer, including a trunk of two tightly and telescopically interconnected upper and lower parts made with top and bottom pipe threads, sealing lip with an outer diameter less than the overall diameter of the packer, shear screws, and the upper packer pipe thread connected with hydraulic anchor comprising, at Merey, from one of the hollow casing, equipped with a nut, straps and spring-loaded dice placed in its radial holes straps.

The purpose of the invention in a variant of the 2 is achieved by what mechanical anchor packer below the sealing sleeves to be installed either on the pipe tightly associated with the hollow body of the hydraulic anchor, or directly on the trunk, additionally equipped zakrivaem device, consisting of a cone with dice and plashkoderzhatelya associated with the barrel of shear screws installed in the threaded holes plashkoderzhatelya and cone, with hydraulic anchor is made with a pipe or without it, with the possibility of triggering from pipe and/or annular - pedacinho excess pressure.

Packer system in a number of variants is given in figures 1-9, in particular: figure 1 shows a General view of the small-sized hydraulic packer anchor; figure 2 and 3 shows a General view of the mechanical anchor packer, respectively, with hydraulic and mechanical zakrivaem device; figure 4 - basic dimensions of the prototype - standard hydraulic packer PD-YAGAMI-122 (or 118) with reduced diameter of 50 mm; figure 5, 6 and 7 dimensions main units developed packers or mechanical support actions; Fig and 9 - downhole Assembly DC for two or more the layers.

Packer system (Fig.1-7) consists of a hydraulic packer (for example, see figure 1) or mechanical support (e.g., see figure 2, 3) actions and hydraulic who Cora.

The packer includes: barrel, made either from solid billet 1 (1, 5, 6, 7), any of several 1 and 2 rigidly connected parts (figure 4), either of two tightly and telescopically interconnected 1 and 2 parts (2, 3), with a trunk 1 (or 1, 2) in General made with the top 3 and bottom 4 pipe threads; the adjusting nut 5; sealing lip 6 (two or more); shear screws 7 (Fig 1) or 7 and 8 (figure 2, 3).

Standard compact hydraulic packers PD-YAGAMI-118 or 122 mm anchor 10 is made with the top 3 and bottom 4 threads of the barrel (from rigidly connected parts 1, 2) thread the tubing 60 (see figure 4), which limits their entrance channel up to a diameter of 50 mm while maintaining the critical section in his body (i.e. threads) in the order of 7 cm2for reliability, the landing and the collapse of the packer.

It should be noted that for small packer PD-YAGAMI-118 (or 122 mm) threaded NCT if you increase diameter even up to 55 mm, the reliability will decrease and will be much lower than the reliability of the tubing 60 mm, and this practice is unacceptable, because the work of this packer is designed for high pressure 35-50 MPa, and its breakdown at high load is not less than 10-12 tons.

Therefore, the barrel 1 of the proposed small-sized hydraulic packer (for example, with a diameter of 118 or 122 mm) anchor 9 and/or 10 (1) made of TRU is Noah workpiece (for example, with a nominal outer diameter of 67.5 to 76 mm) or with the upper 3 and lower 4 combined pipe threads - drill planted out by the end of N. 60 and tubing (smooth or planted) tubing 73 (see figure 5), or with the top 3 and bottom 4 of the same pipe threads - drill planted out by the late H 60 (figure missing), or with the top 3 and bottom 4 of the same pipe threads - tubing (smooth or planted) tubing 73 (see figure 5), which provides, depending on the selected thread of the barrel, a relatively larger bore diameter of the packer from 55 to 62 mm, without compromising the reliability of the packer on a dangerous section of his body not less than 7 cm2. This section is always considered, namely by threads 3, 4 of the barrel 1 (or 1, 2), so as to establish a hydraulic cylinder-piston and sealing collars on the barrel he always performed with a large outer diameter than the threads 3 and 4.

The barrel 1 of the upper packer pipe thread 3 is connected with a hydraulic anchor 9 and/or 10, triggered either from the pipe and annulus - pedacinho overpressure (for example, see figure 1), or only from the pipe (for example, 2, 3, 7), or only from the annular - pedacinho overpressure (for example, 4, 5, 6).

Hydraulic anchor consisting of two 9 and 10 (figure 1) or one 9 (figure 2, 3, 7) provocatus, equipped with a nut 11, a nozzle 12 (Fig 1, 4, 5, 6) or without (figure 2, 3, 7), slats 13 and the spring-loaded dice 14 housed in its radial holes 15 under the slats 13. When the pipe 12 may be connected to the housing 10 anchors rigidly through the thread (for example, see figure 1)and can be freely and sealed (with sealing element is a ring) is connected with the housing 10 and have free rotation and limited movement relative to the housing 10 (e.g., see figure 4)to reduce the likelihood of damage to the sealing cuff at planting and the disruption of the packer.

Hydraulic (1) the packer is a hydraulic cylinder-piston, respectively, 16 and 17, forming a barrel with 1 ring cavity associated with the cavity of the barrel 1 through the radial hydraulic channels 18, and, accordingly, include zakrivaem device hydraulic action, consisting of a cone 19 with the dies 20 and plashkoderzhatelya 21 with the screw holes 22 and a stop on the shoulder of the barrel 1, and connected with the barrel 1 shear screws 7 installed in the threaded holes 22 plashkoderzhatelya 21.

It should be noted that the stem 1 compact hydraulic packer (for example, with a diameter of 118 or 122 mm) shall not apply to the drill pipe or compressor, and it is used billet (for example, with conditional the outer diameter of 67.5 76 mm) from the top 3 and bottom 4 ends (see 5), respectively, threaded n (see GOST standard 631-75, cert, 2 and 8, where the outer diameter of the landing is 67, 46 mm) and/or threaded tubing 73 (see GOST 633-80).

Dangerous sections of the barrel 1 of the packers (for example, see figure 1-7) there are always at their thread.

Example 1 the prototype. At a nominal internal diameter of the barrel 50,3 mm section (Sn) on the threaded tubing 60 GOST 633-80 (where d*cf=58,989 mm for smooth tubes; d*cf=61,148 mm for planted pipes; see table 10) will be smooth pipes (see figure 4)

Sn=π/4×(d*cf2-d*NR2)=0,785×(5,89892-5,032)=7,45 cm2.

When the maximum internal diameter of the barrel 52,35 mm section (Sm) on the threaded tubing 60 will be

Sm=π/4×(d*cf2-d*NR2)=0,785×(5,89892-5,2352)=5.8 cm2.

Conclusion 1. Thus, for reliability packers with overall diameters 118 and 122 mm dangerous section on their trunks, namely the thread, you can take not less than 7 cm2.

Example 2 on a new packer. Consider, for packers with an overall diameter 118 and 122 mm (for example, see figure 5) calculation of the proposed shaft 1 with an inner diameter (for example, 57 mm) and thread 3, for example, from n according to GOST standard 631-75.

At a nominal internal diameter of the barrel 65,576 mm section (Sn) on the threads of n (state standard 631-75) will be:

Sn=π/4×(d*cf2-d*NR2)=0,785×(6,55762-5,72)=8,25 cm2.

When the maximum internal diameter of 57.5 mm section (Sm) thread N 60 will be:

Sm=π/4×(d*cf2-d*NR2)=0,785×(6,55762-5,752)=7,8 cm2.

Conclusion 2. Example 1 and 2 shows that the packers with an inner diameter of 57 mm and a thread n (figure 5) exceed the dangerous section 7 cm2and more reliable than the packers with the barrel, made of tubular workpieces with inner diameter of 50 mm and a thread NCT (figure 4).

Example 3. Taking dangerous section is equal to 7 cm2based on the maximum internal diameter of the packer with thread N 60:

Conclusion 3. For reliability packers with overall diameters 118-122 mm range changes in the internal diameter of the trunk with the upper and lower threads n or with one end threaded in, and at the other end of the threaded NCT can be from 55 to 58.3 mm But to the trunk with the upper and lower ends of tubing 73 is made dangerous section is not equal, and it is more than 7 cm2and for the reliability of small packers internal diameter of the barrel conditionally accepted from 55 to 62 mm

Hydraulic packer (for example, see figure 1) works as follows.

Create what is excess pressure inside the barrel 1, which acts on the hydraulic cylinder-piston 16 through radial hydraulic channels 18, and the hydraulic actuation of the packer after the shear screws in the cylinder, for example, at a pressure of 10 MPa. In the process of landing this packer with increasing pressure up to 23 MPa hydraulic cylinder-piston 16, on the one hand, provides for movement of the cone 19 and down, respectively, the introduction of dies 20 in the wellbore, and on the other hand, provides compression sealing collars 6 and hermetic separation between the two cavities (e.g., bottom-hole formation zone and other wells. If hydraulic hydraulic anchor packer is equipped with a housing 9 with the dies 14, the plate 14 of the housing 9 is moved radially from the pipe overpressure and run into the wellbore, which eliminates the ability to move the packer when it is fit and well operation. Also, if the hydraulic anchor is equipped with a pipe 12 and the casing 10 with the dies 14, during operation of the wells of the plate 14 of the chassis 10 is moved and run into the wellbore from excessive annular-pedacinho pressure, which also increases the reliability of the hydraulic packer and eliminates spontaneous his raspaculo at high pressure drops.

Mechanical anchor packer with hydraulic zakrivaem device (for example, see Phi is .2) works as follows.

Down in the hole mechanical anchor packer with the shank and provide a hard stop its lower part 2 of the barrel through the shank to the bottom or lower planted another packer. Then, it creates a positive pressure inside the barrel 1 of the packer, which acts on the hydraulic cylinder-piston 17 through the radial hydraulic channels 18, and is triggered only hydraulic saarialho device after slice shear screws 7 (for example, at a pressure of 8 MPa), i.e. moving plashkoderzhatelya 21 upward relative to the stem 1, 2 and, respectively, of the dies 20 relative to the cone 19, or Vice versa, which provides the implementation of the dies 20 in the wellbore. Then, it creates an axial load (for example, from 6 to 10 tons, depending on the depth of the packer, wellbore inclination and the hardness of the sealing collars) on the packer and ensures the movement of the upper portion 1 of the barrel relative to the real bottom 2, with cut off shear screws 8 cone 19 and is compressed sealing collars 6 and hermetic separation between the two cavities (e.g., bottom-hole formation zone and other wells. If the hydraulic anchor packer is equipped with a housing 9 with the dies 14, the plate 14 of the housing 9 is moved radially from the pipe overpressure and run into the wellbore during landing and operation of wells is. If the packer to anchor on the figure 2 is equipped with a pipe 12 and the casing 10 with the dice 14 on the analogy of the packer on the figure 1, 4, 5 and 6, the die 14 of the housing 10 is moved and run into the wellbore from excessive annular - pedacinho pressure, thereby increasing the reliability and integrity of the packer.

Mechanical anchor packer (for example, see figure 3) is also equipped zakrivaem device, but not hydraulic, namely mechanical action (without cylinder-piston 17 and the radial hydraulic channel 18)located below the sealing collars 6 and consisting of a cone 19 with the dies 20 and plashkoderzhatelya 21 associated with the barrel 1 shear screws 7 and 8, mounted in threaded holes plashkoderzhatelya 21 and the cone 19.

Mechanical support with a mechanical packer zakrivaem device (for example, see figure 3) works as follows.

Down in the hole mechanical anchor packer with the shank and provide a hard stop its lower part 2 of the barrel through the shank to the bottom or lower planted another packer. Then, it creates an axial load (for example, from 6 to 10 tons) on the packer and ensures the movement of the upper portion 1 of the barrel relative to the real bottom 2, while ensuring the mechanical actuation saarialho device by slice shear screws 7 plus is the holder 21, there is provided a moving cone 10 down relative to plashkoderzhatelya 21 with the dies 20 and, accordingly, the introduction of dies 20 in the wellbore. Next cut off shear screws 8 cone 19 and is provided with a compression sealing collars 6 and hermetic separation between the two cavities (e.g., bottom-hole formation zone and other wells. If the hydraulic anchor is equipped with a housing 9 with the dies 14, when the landing of the packer plate 14 of the housing 9 is moved radially from the pipe overpressure and run into the wellbore. Also, if the mechanical anchor the packer in figure 3 is equipped with a housing 10 with the dice 14 on the analogy of the packer on the figure 1, 4, 5 and 6, when the operation of the packer plate 14 of the chassis 10 is moved and run into the wellbore from excessive annular-pedacinho pressure, thereby increasing the reliability and integrity of the mechanical support of the packer.

It should also be noted that after actuation saarialho device mechanical packer and stop his dice 14 on the cone 10 in the trunk (production casing) well, the axial load from the weight of the pipe string (for compression sealing collars 6) is transmitted not to the shank (NWC) of the packer through the lower part 2 of the barrel, so as to avoid deformation of the shank below the packer), and it is transmitted in the production casing, squag the us.

In addition, zakalivayuschie device mechanical packer (e.g., 118, 122 mm, etc. can be performed with flow limiting his dice 14 relative to cone 10 in order to increase the outer diameter of the packer on the dice 14, for example, to 125, 127 mm, only for the alignment of the packer in the well. When this die 14 will not Balk at the production casing of the well (for example, with a nominal external diameter 140, 146 mm, etc. and, accordingly, the axial load from the weight of the tubing to compress the sealing cuff 6 is transmitted entirely on the shank below the packer through the trunk 2.

The release of the packer hydraulic or mechanical support action is accomplished by tensioning the tubing and, accordingly, its trunk 1 up after ensuring the well balancing the pressure in the cavity of the barrel 1 or 1 and 2, and the space above and below the sealing sleeves 6. The barrel 1 of the packer anchor relative to its saarialho device moves up and releases the sealing lip 6, and then the shoulder of the barrel, resting on the cone 19, frees him from the dies 20, thus is the breakdown of the packer.

Packer system (Fig, 9) includes a descent into the well 23 Monotube layout of dual use for mining (flowing and gas lift), injection or pieza the electrical borehole (for example, with a trunk diameter of 140, 146, 168, 178 mm, etc.)consisting of:

one pipe string 24;

- installed simultaneously or separately above 30 and between 30, 31 and/or 31, 32 of the perforation intervals layers packers 25, 26 and/or 27 (may be less or more), in particular, with the switch-connector columns 28 and/or 29, on the effects of their work in any variation (for example, hydraulic, hydro-mechanical, mechanical or other action);

- well chambers 33, 34 and 35, 36 and/or 37, 38 disposed between the packers 25, 26 and/or 26, 27, and below them, and at least one of them 39 above the top packer 25, and includes a removable 40, 41, 42, 43 and/or 44, 45 blind tubes, regulators, or auxiliary devices for control and measurement of parameters of each layer.

Single tube arrangement has an additional packer 47 (hydraulic or mechanical or hydro-mechanical, or other action) with disconnector connector columns 46 or without it installed with the open hole below the perforated interval 32 of lower layer, and the additional packer 47 hermetically divides the circular space of the lower layer 32 of the bottom 48 of the bore 23 and hydraulically connects it to the cavity of the pipe string 24 to subsidence and collect it from mechanical impurities. In addition, the layout above the upper packer 25 and/or lower more the tion of the packer 47 feature pressing the nipple 49, 50 to install a removable check valve when pressure testing the tubing 24 and/or landing of the packer, for example, 47. As well as additional packer 47 (hydraulic action) below can be fitted Shoe shear valve 51 to its landing. Pressing the nipple 49 or Shoe shear valve 51 from the bottom or made in the form of the guide cone, or equipped with a funnel guide 52 for passage through the packer 47 cable and cable tools and devices. Above the top packer 25 may also be mounted disconnector-connector columns (like 28) to detach the tubing 24 from the upper packer 25 in the repair.

1. Packer system consisting of a hydraulic packer and anchor for wells with a nominal outside diameter of the barrel 140-146 mm, the first of which includes the barrel in one piece or of several rigidly connected parts, is made with upper and lower pipe threads, adjusting nut, sealing lip with an outer diameter less than the overall diameter of the packer installed either on the pipe tightly associated with the hollow body of the hydraulic anchor or directly on the barrel, shear screws, hydraulic cylinder-piston forming with the barrel ring cavity associated with the cavity of the barrel through the radial hydraulic channels, zakalivayuschie mouth is eusto hydraulic action, consisting of a cone with dice and plashkoderzhatelya with the screw holes, and is made with emphasis on the shoulder of the barrel and connected with the shaft shear screws installed in the threaded holes plashkoderzhatelya, the packer upper pipe thread connected to the anchor fired from pipe and/or annular-pedacinho excess pressure, comprising at least one hollow body, equipped with a nut, pipe or without straps and spring-loaded dice placed in its radial holes straps, characterized in that to ensure the bore diameter of the small-size packer system in the range from 55 to 62 mm, while maintaining the critical section through the body of the barrel not less than 7 cm2the packer is made, depending on its flow diameter, or with the upper and lower combined pipe threads - drill planted out by the end of N. 60 and tubing smooth or planted tubing 73, or the top and bottom of the same pipe threads - drill planted out by the late H 60 or the top and bottom of the same pipe threads - tubing smooth or planted tubing 73.

2. Packer system consisting of a mechanical anchor packer, including a trunk of two tightly and body is Kupechesky interconnected upper and lower parts, made with upper and lower pipe threads, sealing lip with an outer diameter less than the overall diameter of the packer, shear screws, and the upper packer pipe thread connected with hydraulic anchor comprising at least one hollow body, equipped with a nut, straps and spring-loaded dice placed in its radial holes straps, characterized in that the mechanical anchor packer below the sealing sleeves to be installed either on the pipe tightly associated with the hollow body of the hydraulic anchor, or directly on the trunk, additionally equipped zakrivaem device, consisting of a cone with dies and plashkoderzhatelya associated with the barrel of shear screws installed in the threaded holes plashkoderzhatelya and cone, with hydraulic anchor is made with a pipe or without it, with the possibility of triggering from pipe and/or annular-pedacinho excess pressure.



 

Same patents:

FIELD: oil and gas production.

SUBSTANCE: group of inventions is related to procedure of hydrocarbons production and maintenance of bed pressure. Support-mechanical packer comprises shaft with thrust external collars and grooves for shear screws, which consists of two telescopically mutually connected upper and lower parts with the possibility of their axial displacement relative to each other, and equipped with sealing rings and ferrules, adapter, adjusting nut and fixator. In order to increase serviceability of packer, it is additionally equipped with mechanical anchoring device, which is installed freely under or above sealing ferrules and comprising the following mutually joined components: cone, flat plates and plate holder. In order to increase serviceability and functionality of packer it may be arranged with cable input in the form of sealing longitudinal dead slot on its shaft inside sealing ferrules.

EFFECT: invention objective is to improve reliability and functionality of support-mechanical packer operation.

4 cl, 10 dwg

Packer // 2363833

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas producing industry, particularly to well installations for repeated, including selective, flow tests of flow string in well. The packer consists of a mandrel with a shaped slot on external surface, where axial short and long sections alternate. Self-packing collar, downstream proof, is assembled on the top of the mandrel; a support is located under the collar. A pressure sealing element in form of an additional self-sealing collar, downstream proof, and a cone rigidly fixed relative to the mandrel are successively arranged under the support on the mandrel. A holder with a guiding pin is arranged on the mandrel below the cone. Along circumference the holder is furnished with spring centralisers and oval sockets which are spring loaded inwards in radial direction by means of springs and are designed to interact with the cone in a working position from inside. A rigid centraliser is assembled on the upper end of the mandrel. A rod cupped from top and furnished with radial holes is screwed into the upper end of the mandrel. A load with a chamber at the bottom is arranged outside the rod. The rod is equipped with fingers assembled above radial holes; while the load is equipped with lengthwise through grooves for the fingers of the rod. The lower part of the load chamber, covering radial holes of the rod leak proof by means of sealing elements, is designed to open radial holes of the rod when the load goes up. Correspondingly, process upper radial channels are made in the load above the lengthwise through grooves and the mandrel below the shaped slot; these channels continuously communicate internal space of the load chamber with external space; also there are made lower process channels below which the mandrel is shut off with an additional load. Axial short and long sections of the shaped slot are interconnected with a closed shaped section.

EFFECT: facilitating flow testing of pipes of smaller diametre, also avoiding packer wedging in flow string during round-trips.

2 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to construction and operation of oil and gas wells, particularly to sealing of annular space of casing liner in well. The facility consists of a transporting column, of a packer unit in form of a mandrel, of a sealing element installed therein, of cone for the sealing element connected to the mandrel and of a puller interacting with the sealing element. The puller is arranged outside the mandrel and connected to it with at least one shear element; also the puller is connected to the transporting column with a detachable unit. Notably, the facility is equipped with an anchor in its lower part; the anchor serves for engagement with internal relief surface of the liner in its upper part.

EFFECT: facilitates simplification of design of facility, increased reliability of its operation and expanded functionality.

5 cl, 2 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas industry, notably, to inflated packers. It contains a packer mandrel, a packing element and a swelling material. The packing element is assembled over the packer mandrel; there is a circular gap between the packing element and the mandrel. The material is placed in the circular gap and is designed to capture at least part of medium supplied into the circular gap between the swelling material and the packing element.

EFFECT: facilitates maintaining tightness after expanding regardless of damage or change of conditions in well.

20 cl, 6 dwg

FIELD: oils and gas production.

SUBSTANCE: group of inventions refers to methods and facilities for conservation, completion and repair of wells. The inventions facilitate control over the well during the said operations by means of assembling system of two partitions in well. Each of the partitions is located below the lower end of a flow string for well completion, when this string is installed into the well. As none of these partitions is installed higher in the borehole of the well, so both partitions rest in place during operations of conservation, completion and repair, which eliminates necessity to use a block of blowout preventers to facilitate reliable control over the well.

EFFECT: reduced cost of well construction due to reduced time required for operation of drilling rig.

44 cl, 23 dwg

Test plug // 2361061

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and is designed for testing boreholes for pressure. Facility for a crushed plug consists of a pipe, in the section of which, in a designed for the plug chamber, there is assembled the plug. The plug contains several round glass disk elements of specified thickness arranged in layers one above the other. The plug in combination with sealing elements tightly closes the passage through the pipe, when a lower side of the plug is installed in the seat of the chamber. Film or sheet of any other, than glass, material is laid between various layers of the plug. The invention facilitates increasing test pressure and withstanding rapid fluctuations of temperature and load.

EFFECT: increasing test pressure and withstanding rapid fluctuations of temperature and load.

20 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: facility refers to oil and gas industry. It is designed for disconnection of producing horizons and for sealing of circular space in interval of upper pipes of liner. The facility consists of a shaft with radial channels made in its walls. A piston designed to perform axial displacements is fixed on the shaft by means of a shear screw. Under the piston there is arranged an expanding cone and a seal containing collars resting on a lower sub, the upper end if which is made in form of a circular projection forming a shell, while on external side surface of the sub there are made lugs, which form centralisers. The invention facilitates preventing break of seal collars, and also preventing possibility of warp of axis of the facility relative to axis of the well due to improved design of the lower sub.

EFFECT: preventing break of seal collars, and also preventing possibility of warp of axis of facility relative to axis of well due to improved design of lower sub.

3 dwg

Packer // 2358089

FIELD: mining.

SUBSTANCE: packer consists of trunk with shaped slot, of centraliser, of self-sealing collar, of sealing element and of cone. A fixture with a guiding pin is assembled on the trunk below the cone; the fixture is intended to axial displacement. The fixture is equipped with oval sockets around circumference; the sockets are spring loaded internally in radial direction by means of springs and they interact with the cone during operation. A rod, capped from the top and connected below with the trunk, is screwed into the upper end of the trunk. At the top the rod is connected with a load equipped with a chamber in the lower part. The rod has radial openings and fingers located above the openings, while the load has lengthwise pass-through grooves for fingers of the rod. The lower part of the chamber is designed to shut off pressure tight radial openings of the rod, when the load goes down. Two axial short sections of the shaped slot are closed between them so, that the pin is situated within boundaries of the short axial sections - transport position - at axial reciprocal movement of the fixture relative to the trunk at length equal or exceeding length L of the short axial sections. When the fixture goes down relative to the trunk at a distance less, than length L of the short sections of axial parts and at following travel of fixture up, the pin goes to a longer axial section of the shaped slot, directed upward and set off along perimetre relative to the short axial sections - working position. Also the pin travels from working into transport position, when the fixture goes down relative to the trunk at a distance exceeding or equal to length - B of the shaped slot.

EFFECT: increased efficiency at multiple pressurising of production string due to possibility to shut off radial openings of rod pressure tight from outside.

2 dwg

FIELD: mining.

SUBSTANCE: released bidirectional packer on cable includes setting tool on cable, stationary bushing with main seat and movable central rod, which is equipped with main stay nut and valve interacting with main seat, movable bushing, two opposing cones, screw-threaded dies connected between them in axial direction and designed to interact with corresponding cones, packer collar and boss made to interact with extraction unit. The stationary bushing is equipped in its middle part with a lengthwise groove, while its ends are equipped with main and additional seats and with upper and lower stops with bypass channels. Also the packer collar is made in form of an upper self-packing collar, is able to travel bottom-up and is located between the upper cone and the upper stop. A lower self-packing collar is situated between the lower cone and lower stop; this collar is able to travel downright; the movable bushing is set on the stationary bushing, it is equipped with a pin inserted into the lengthwise groove of the stationary bushing. Further screw-threaded dies are arranged on the movable bushing, are pressed inwards with spring rings and each of them is equipped with centralisers pressed outward. The central rod is equipped with upper and lower circular grove with the additional stay nut and the valve. The main and additional valves are assembled in corresponding upper and lower grooves and are able to limited displacement between the corresponding stops and interior edges of the corresponding circular grooves; also the valves are pressed from the stops to corresponding main and additional seats. The main and additional stay nuts are arranged at a uniform distance from the pin of the movable bushing and are able to interact with the pin; the boss is rigidly connected to the top of the central rod and is made in form of a cone tapered at the top, on the interior surface of which there is made a closed shaped slot with a groove connecting it with the upper edge of the boss. The setting tool is made in form of a branch with a pin inserted into the shaped slot, which is made so, that at reciprocal movement of the setting tool relative to the boss for the length exceeding the height of the shaped slot, the pin will be located within the limits of the shaped slot; if the length is less, then the pin will go into the groove of the shaped slot at travel upward.

EFFECT: simplification of packer design eliminating implementation of electric engine with cable and facilitating setting and disruption of packer in specified interval of well without special devices.

2 dwg

FIELD: mining.

SUBSTANCE: released bidirectional packer on cable includes setting tool on cable, stationary bushing with main seat and movable central rod equipped with main stay nut and valve interacting with main seat, movable bushing, two opposing cones, screw-threaded dies connected to each other axially and designed to interact with corresponding cones, packer collar, and boss made to interact with extracting unit. The stationary bushing is equipped in its middle part with a lengthwise groove, while at the ends it is equipped with the main and additional seats and with upper and lower stops with bypass channels. Also the packer collar is made in form of an upper self-packing collar allowing bottom-up travel and located between the upper cone and upper stop. A lower self-packing collar is situated between the lower cone and lower stop; this lower self-packing collar travels downright; the movable bushing is located on the stationary bushing and is equipped with a pin inserted into the lengthwise groove of the stationary bushing. The screw-threaded dies are assembled on the movable bushing and are pressed inside with spring rings; the dies are equipped with centralisers, spring loaded outwards. Further the central rod is equipped with upper and lower circular grooves, with additional stay nut and valve; the main and additional valves are placed in corresponding upper and lower grooves and are able to pressure tight limited travel between the corresponding stops and internal edges of corresponding circular grooves; they are pressed from the stops to corresponding main and additional seats. The main and additional stay nuts are arranged at uniform distance from the pin of the movable bushing and interact with the pin. Also the lower stop is equipped with outward spring loaded plates assembled uniformly outside along the perimeter of the lower stop and designed to limited radial movement; the boss is rigidly connected with the top of the central rod. The boss is made in form of the tapered at the top cylinder, on the exterior surface of which there is made a shaped closed slot with a groove connecting the slot with the upper edge of the boss. The setting tool is made in form of a branch with a pin inserted into the shaped slot, which is made so, that at reciprocal movement of the setting tool relative to the boss at the length exceeding the height of the shaped slot the pin will be located within the limits of the shaped slot; if the length is less, then the pin will go into the groove of the shaped slot at travel upward.

EFFECT: simplification of packer design eliminating implementation of electric engine with cable and facilitating setting and disruption of packer in specified interval of well without special devices.

2 dwg

Packer // 2245986

FIELD: oil and gas extractive industry.

SUBSTANCE: packer has body in form of pipe, whereon collar compactors are placed with limiting washers, saddles for locking tool dropped from surface, cover, upper and lower fixing elements, made in form of anchoring assemblies, upper conical bushing, rigidly connected to pressing bushing and movably to the body, lower conic bushing, made rigidly together with body, guide of this conic bushing made in form of plate spring, placed by one end moveably in guiding groove in lower portion of lower die with teeth, and by other end fixed rigidly on greater diameter of this conic bushing, auxiliary pipe, placed inside the body. Packer in lower portion is provided with check valve, placed inside recess of body, concurrently being also the body of valve. Oppositely to valve saddle on same axis stepped locking bushing is placed with possible sliding inside body recess with limited drive and possible overlapping of radial grooves made in body, which, in its turn, is rigidly connected to auxiliary pipe via shear pin. Between stepped locking bushing and saddle compression spring is placed. Fixing elements of collar compactors are made in form of comb with inner teeth and outer conic generators in nose portion. On the side of collar compactors these are enveloped by inner conic portion of compression bushing, in its turn rigidly connected to upper conic bushing, and on the other side combs with inner teeth are placed sliding-moveably in radial grooves of guiding bushing placed between ends of upper conic bushing and inner conic portion of compression bushing with possible engagement by inner teeth of comb to slanting walls of body groove and interaction to all elements of this assembly.

EFFECT: higher reliability.

5 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: system has upper and lower packers, each of which has body, shaft, anchor, compactors, and pipes, placed between packers. In shaft of upper packer a copier is made with fixing device of transporting and working position of anchor and a sub. The latter is mounted with possible axial displacement and rotation around the copier. Sub is placed on pipes between packers, mated to lower packer and has no capability for axial rotation and displacement relatively to their axis in operating position of lower packer. On lower packer shaft a copier is made with possible axial displacement with it for interaction with anchor and its displacement from transporting position to operation position.

EFFECT: simplified construction, broader functional capabilities.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: stand has imitators of casing and lifting columns with packer between them, means for heating casing column imitator, main hydraulic cylinder for axial loading and unloading of packer, pumps to create pressure. Stand is provided with additional hydraulic cylinder with hollow rod and cylinder, connected to rod of min hydraulic cylinder. Additional hydraulic cylinder is encased in the body, rigidly connected to main hydraulic cylinder and imitator of casing column. In additional hydraulic cylinder a ring-shaped piston is placed with conical skirt, interacting with keys with possible periodical supporting against the body through windows in said cylinder and below keys spring-loaded ring-shaped pusher is moveably mounted. In hollow of imitator of lifting column a floating piston is positioned, this hollow and hollow of the hollow rod are interconnected and also connected to hollow above ring-shaped piston.

EFFECT: broader functional capabilities, higher efficiency.

7 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device includes hollow body with a row of vertical apertures, a collar, pusher bushing, placed on body with possible interaction with collar, cone, mounted on the body, cylinder, connected to cone, screw-thread dies with die holder, mounted on the body with possible extension of dies in radial direction during interaction with cone, saddle and shear screws. According to invention in die holder additional through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Inner hollow of die holder is connected to inner hollow of body by a row of radial apertures. In pusher bushing through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Pusher bushing is rigidly fixed to the body, and its inner hollow is connected to inter-tubular space below the collar.

EFFECT: higher reliability, durability and lower cost.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has body with radial apertures, two compacting assemblies thereon and valve assembly between them. Each compacting assembly comprises a collar, stopping branch pipe, cylinder, forming a ring-shaped hollow with the body, wherein a bushing is placed. In upper compacting assembly ring-shaped hollow is covered by plug from lower side, which is fixed in cylinder and interacts with collar, cylinder is connected to body by cams, placed in radial apertures of plug and in ring groove of body, bushing is made stepped, long step of which interacts with cams and is fixed by shear screws from displacement in ring plane, which is connected to well. In lower compacting assembly bushing is provided with holder, on the body a cone is mounted, interacting with sockets, placed in grooves of stopping branch pipe, which is fixed on the body by shear screws.

EFFECT: higher reliability.

2 cl, 4 dwg

Two-packer device // 2249669

FIELD: oil and gas industry.

SUBSTANCE: device has shaft with radial channels and return valve, upper and lower compacting elements. Inside the shaft a hollow spring-loaded moving rod is placed. It has radial apertures and recesses. Between apertures a throttle is rigidly placed. On upper portion of rod a piston is placed. Working hollow, formed between rod with piston and barrel, fixed on inner portion of shaft, is connected to above-packer space of well by radial aperture, made in barrel wall. Working hollows of upper and lower compacting elements are connected by axial channel, made in shaft and ring channel, formed between inner and outer pipes, connecting lower compacting element to the shaft. On upper portion of pipe through radial apertures are made and cylindrical recess, matching rod diameter, in which rod a plug is place. Outer diameter of upper end portion of rod equals outer diameter of lower rod portion.

EFFECT: higher reliability.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: packer has body, in which electric engine, reducer with output shaft, connected to screw couple, which is connected to traction, having holding rods on lower portion with spring for transfer of axial force to central rod, having a shelf in upper portion as well as recess and cuts, and in inner portion - compacting rings and stopping nut, are positioned. Packer has shell, having conical surface on inner portion, special part with shelves, shear ring placed in grooves of said special part and holding segments, immobile bushing connected fixedly to special part. Packer has packer rubber, saddle, rigidly connected to special part, moveable flange and two cones, placed oppositely to each other, dies, moveably placed on cones, traction, jointly connected to dies, branch pipe, fixedly placed on body, moveable bushing, balls, pressed by spring and screw for connection of special part to shell, cable of rope, being a carrying cable and feeding electric engine via filament, shear washer, pressed by nut. When packer is removed, engaging assembly is utilized, which includes pusher, screwed on lower portion of screw couple screw, cut holder and cover. Through apertures are made on special part and moveable flange for connection of above-packer and below-packer well hollows.

EFFECT: lower costs and simplified maintenance.

6 dwg

Packer // 2251614

FIELD: oil production industry, particularly means for dividing an annular space and a tube space in flowing, gaslift, and beam wells.

SUBSTANCE: packer includes shaft with outer bored surface and bead and sealing members supported by the bead. Packer also has air cylinder forming annular cavity together with packer shaft. Cavity is connected with shaft interior through radial channels. Packer includes anchoring means. Lower anchoring means includes cone with slips and slip holder having bored inner orifice and threaded orifices. Lower anchoring means rests upon the bead and is connected to the shaft by shear screws installed in threaded orifices of slip holder. Shaft defines inner bored diameter and includes sliding bush located inside shaft. Shaft is provided with lower and upper grooves for sealing rings receiving and with outer grooves for cams and additional shear screws installation. Outer grooves are located between lower and upper ones. Slots are formed below bead on outer shaft surface for installing cams with limited radial travel. Threaded orifices are formed on outer shaft surface above inner groove thereof. Arranged into groove are additional shear screws to secure sliding bush in its initial position. The slip holder is freely installed on shaft or is spring-loaded. Support-moving bush is installed in inner bored orifice of slip holder between shear screws and cams. Support-moving bush is provided with facet formed from cam side and contacts with cams along mating facets upon shearing of shear screws. Free travel between cams and end of support-moving bush exceeds shear screw diameters to provide shearing thereof. When sliding bush is installed in fixed position cams extend above an outer shaft surface generator to provide displacement of support-moving bush and cut of shear screws. When sliding bush is located in operating position cams are located below outer shaft surface generator and move in radial direction into outer groove of sliding bush to provide free cam movement under support-moving bush and shear screws.

EFFECT: reduced number of lowering and lifting operations and breakdowns in the case or packer separation or during packer pulling out of well.

18 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body, made in form of branch pipe with elastic collar mounted on it, expanding assembly with cone, shear element, gear, lowered on pipes column into additional casing column and interacting with expanding assembly from above. Expanding element is positioned in upper portion of branch pipe and locked with its cone directed downwards, gear is made in form of pusher in lower portion and anchor assembly in upper portion. Pusher is made in form of hydraulic cylinder, made with possible pressure from above on expanding assembly and provided with piston and hollow rod, which is connected to piston rigidly, and to pipes column - hermetically with possible upward axial displacement. Anchor assembly is made in form of dies, mounted on hollow rod with possible radial movement outwards during movement of hollow rod upwards relatively to pipes column. Shear element holds hollow rod relatively to pipes column during lowering into well.

EFFECT: simplified construction, lower costs.

1 dwg

FIELD: mining industry.

SUBSTANCE: device has packer, mounting tool and anchor assembly. Packer expander is mounted in upper portion of body, and anchor assembly - above hydraulic chamber of mounting tool. Hydraulic chamber cylinder is mounted with possible displacement relatively to rod and hydraulically connected to inner space of device. Body of anchor assembly is provided with sockets, in which spring-loaded dies are mounted, which are activated by hydraulic effect formed in tubing pipes column, on which device is lowered into well.

EFFECT: simplified construction, higher reliability, higher efficiency.

1 dwg

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