Method for isolation of reservoir water inflow in well with buckled flow string under conditions of abnormally low reservoir pressures

FIELD: oil and gas production.

SUBSTANCE: sand plug is washed down to lower perforation holes of existing interval of perforation, and buckling of flow string is eliminated. Then tail of smaller diametre pipes is lowered in inner cavity of flow string to head of washed sand plug, with arrangement of tail head by 20 m higher than reservoir roof, which is cemented by mortar, leaving cement sleeve in inner cavity of tail down to depth of upper holes of existing perforation interval. After cement hardening, tail and flow string are perforated in interval of above dehydrated part of reservoir to its roof. Lifting string is lowered into well, gas inflow is caused from reservoir, and well is flared, gas dynamics research is carried out, and well is put in operation. At the same time cement mortar consists of portland cement, superplasticiser C-3, polyvinyl alcohol and polypropylene fibre.

EFFECT: liquidation of reservoir water inflow and elimination of flow string buckling conditions, provision of water-free operation of wells.

3 dwg

 

The invention relates to the oil and gas industry, namely to isolate the flow of formation waters in the gas and gas condensate wells with rumpled column operating under conditions of abnormally low formation pressure.

At fields in Western Siberia there are a large number of oil and gas deposits with complex built by the collectors, which are interleaved between the layers of different permeability. Thus the thickness of these deposits are often small, which forces to carry out their secondary opening in the high-permeability gas-saturated part of the reservoir, leaving less permeable part is not opened, the perforated production casing had to be a continuous interval and double density.

At the final stage of development of such deposits a large number of wells out of operation due to lower reservoir pressure, flooding and collapse of the lower part of the casing in the perforation interval. This is due to the emergence of a large difference between mountain and bottomhole pressures as extraction of hydrocarbon deposits, i.e. pressure rocks and the pressure in the well and the reservoir.

In these conditions, traditional methods to eliminate the flow of formation waters, restore productivity and output hole of estaste difficult. To eliminate the inflow of formation water without eliminating crumples the production string is not possible, and to eliminate its crushing installing insulation packers or longitudinally corrugated patches because of the continuous perforating the production casing and lowered for this reason her strength to carry out technically impossible.

There is a method of isolating the flow of formation waters, including pumping in vodoprivredu part of the layer of cement slurry under pressure and keeping well in the setting time of cement slurry [Reference book on current and capital repair of wells /Ademero and others - M.: Nedra, 1979. - S-241].

The disadvantage of this method under conditions of abnormally low formation pressure, in the presence of the rumpled surface casing is the lack of reliability isolate the flow of formation waters, resulting after perforation in newbudnudes productive part of the reservoir formation water again begins to flow into the well, Obvodny new perforation interval.

There is a method of isolating the flow of formation waters, including pumping in vodoprivredu part of the layer of cement slurry under pressure and keeping well in the setting time of cement slurry [RF Patent №2127807, EV 43/32].

The disadvantage of this method under conditions of abnormally low formation Yes the lines when there rumpled production casing is the lack of reliability isolate the flow of formation waters, after a perforation in newbudnudes productive part of the reservoir formation water again begins to flow into the well, Obvodny new perforation interval.

The challenge when creating the invention is to improve the reliability of the isolation of the inflow of formation water and increase water-free period of operation of the well when the integrity of the production string.

Achievable technical result, which is obtained by the invention, is to eliminate the flow of formation waters and elimination of conditions of the collapse of the production string, in providing waterless operation of wells and the receipt of scheduled quantities of gas production.

The task and the technical result is achieved by the fact that while isolating the flow of formation waters in the well with the rumpled column operating under conditions of abnormally low formation pressure, washed sand tube to the bottom of the existing holes of the perforated interval, eliminate wrinkling of the production casing, the inner cavity of the casing head to the washed sand tube down the shank of the pipe of smaller diameter with the head of the shank 20 m above the roof of the reservoir, cement shank cement mortar, leaving cement and glass in the interior on the spine of a shaft to the depth of the top of the existing holes of the perforation interval, after a waiting period of solidification of the cement are perforated under the operation of two columns, shank and production casing in the interval above obwodnica part of the productive formation to its roof, well down Elevator column, perform the call flow of gas from the reservoir and the working out well at the torch, hold the gas-dynamic researches and enter the well in operation, the cement mortar is used, the composition containing Portland cement, superplasticizer C-3, polyvinyl alcohol and polypropylene fiber.

Figure 1 shows the structure of a well-to repair, figure 2 - the scheme of realization of the proposed method when washing the sand tube and the descent of the shank, figure 3 is the same in the process of perforation under operation and bringing the well into operation.

The method is implemented in the watered well in conditions of abnormally low formation pressure (figure 1), in which the perforations opened the bottom, the most permeable, gas-saturated thickness of the productive stratum 1, in which the existing perforation interval 2 completely blocked by sand tube 3 and the gas-contact 4 has risen above the top of the existing holes of the perforated interval 2. Operating column 5 perforated uniformly continuous interval and double what letestu, its lower part was prokontrolirovali and possible leaks or damp due to the large difference of the mountain and downhole pressures, i.e. the pressure of the rocks and the pressure in the well and the reservoir.

Initially in the well (figure 2) washed sand tube 3 to the lower holes of the existing perforation interval 2.

Then in the internal cavity of the casing 5 to the head 6 washed sand tube 3 down the shank 7 of the pipes of smaller diameter with the head 8 of the shank 7 to 20 m above the roof 9 of the productive layer 1. The shank 7 is lowered into the inner cavity of the casing 5 to prevent further collapse of the production casing 5 due to the large difference of the mountain and downhole pressure conditions of abnormally low formation pressure.

The shank 7 cement mortar of 10, leaving cement and glass 11 in the inner cavity of the shank 7 to the depth of the top of the existing holes of the perforated interval 2. Moreover, to prevent absorption of cement 10 under conditions of abnormally low formation pressure and get solid cement applied composition containing Portland cement, superplasticizer C-3, polyvinyl alcohol and polypropylene fiber. As a Portland cement can be used Portland cement PTC 1-50 and the and PTC 1-100, as the polyvinyl alcohol - polyvinyl alcohol PVA 18/11 or PVS VN, and as polypropylene fibers can be used polypropylene fiber called "fiber" or inert fibrous filler.

After a waiting period of hardening cement (figure 3) carry out the perforation under the operation of two columns, the shank 7 and the casing 5, in the interval above obwodnica productive part of the reservoir 1 to the roof 9 of the productive layer 1. The newly formed perforation interval under operation 12 reveals the top, less permeable, gas-saturated thickness of the productive layer 1, not involved in the previous process cycle of the well. The perforation can be cumulative punches high power, for example PJ 2906 "omega" or SPKT 73-SE, the PCB 80, the GOK 42S.

After that, well down Elevator column 13 with the placement of the Shoe on the tubing string 13 2-5 m above the head 8 of the shank 7 and carry out work on call flow of gas out of the formation and development of wells on the torch. After working well and holding gas-dynamic researches of wells put into operation.

An example implementation of the method in well No. 340 vyngapurovskogo field.

Initially in the well using coiled tubing installation washed sand tube to either them hole existing perforation interval.

Then in the internal cavity of the casing with a diameter of 168 mm head to the washed sand tube pulled the shank of the pipe with a diameter of 114 mm In this case the head of the shank is placed at 20 m above the roof of the productive formation to prevent the collapse of the production string in the productive interval of the formation with a further reduction of reservoir pressure and increase the pressure drop rocks and deposits.

The liner was cemented with cement mortar containing Portland cement PTC 1-50, superplasticizer C-3, polyvinyl alcohol varieties 18/11 and polypropylene fiber "fiber", in volume 35 m3. Moreover, the cement behind the shank, between him and the production column, raised to the head of the shank and the inside of the shank has left cement glass to the depth of the top of the existing holes of the perforated interval. Thus the cement bridge, reinforced shank, blocked all obwodnica part of the productive formation. The reliability of the isolation of the produced water is provided by the composition of the cement, the large height of the cement bridge and its reinforcement shank.

After a waiting period of hardening of cement made the perforation under the operation of two columns, shank and production casing in the interval above obwodnica parts products is second reservoir up to the roof of the reservoir. The newly formed perforation interval under operation revealed the top, less permeable, gas-saturated thickness of the reservoir, not involved in the previous process cycle of the well. Perforation spent a cumulative perforator increased power PJ 2906 "omega".

Then in the well was lowered Elevator column to a depth of 2 m above the head of the shank to ensure the ability to conduct repairs coiled tubing installation. Held the call flow of gas from the reservoir through a coiled tubing unit and has worked well on the torch to its exit on the technological regime. After working well and holding the gas-dynamic researches the well was put into operation.

The inventive method provides reliable insulation vodoprivreda part of the reservoir, eliminates the inflow into the well formation water, prevents further collapse of the production casing, extends anhydrous well operation, contributes to obtaining project gas production volumes.

The way to isolate the flow of formation waters in the well with the rumpled column operating under conditions of abnormally low formation pressure at which washed sand tube to the bottom of the existing holes of the perforated interval, eliminate wrinkling of the production casing, the inner Polo is th casing head to the washed sand tube down the shank of the pipe of smaller diameter with the head of the shank 20 m above the roof of the reservoir, cement shank cement mortar, leaving cement and glass in the inner cavity of the shank to the depth of the top of the existing holes of the perforation interval, after a waiting period of solidification of the cement are perforated under the operation of two columns, shank and production casing in the interval above obwodnica part of the productive formation to its roof, well down Elevator column, perform the call flow of gas from the reservoir and the working out well at the torch, hold the gas-dynamic researches and enter the well in operation, the cement mortar is used, the composition containing Portland cement, superplasticizer C-3, polyvinyl alcohol and polypropylene fiber.



 

Same patents:

FIELD: oil and gas production.

SUBSTANCE: sand plug is washed down to lower perforation holes of existing interval of perforation, and buckling of flow string is eliminated. Then water-insulation composition is injected into existing interval of perforation, is pushed into reservoir, creating a water-insulation screen, and displacing reservoir water in depth of reservoir by displacement fluid. Then tail of smaller diametre pipes is lowered in inner cavity of flow string to head of washed sand plug, with arrangement of tail head by 20 m higher than reservoir roof, which is cemented by mortar, leaving cement sleeve in inner cavity of tail down to depth of 1-2 m higher than current gas-water contact and higher than upper holes of existing perforation interval. As cement hardening waiting time elapses, two strings, tail and operating strings are perforated for operation, in interval above the cement sleeve to roof of reservoir. Then lifting string is lowered in well by 1-2 m higher than the tail head. Gas flow is caused from reservoir, and well is flared. Gas dynamics research is carried out, and the well is commissioned. At the same time water-insulation composition is represented by liquid glass, displacement fluid - by methanol, cement mortar is a composition that consists of portland cement, superplasticiser C-3, polyvinyl alcohol and polypropylene fibre.

EFFECT: liquidation of reservoir water inflow and elimination of flow string buckling conditions, provision of water-free operation of wells and getting planned volumes of gas production.

1 ex, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: in well operation method involving pumping of composite material to the formation to the interval below oil-water contact, process exposure and operation of the well, there preliminarily performed is forcing of water from inter-tube space with oil to the interval below oil-water contact; in order to prepare composite material the thickener is filled to inter-tube space of the well on the basis of 1-5 kg per 1 m3 of oil located in inter-tube space, and mixing of thickener with oil in inter-tube space by oil circulation with thickener via tubing string and inter-tube space, and pumping of solution of oil and thickener from inter-tube space to the interval below oil-water contact is performed in pulse mode under pressure exceeding hydrostatic one by not more than 10%; at that after process exposure the well operation is performed during the first 5-15 days in moderate mode with flow rate of not more than 50% of the operating one.

EFFECT: reducing associated water production.

1 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves use of the well and flow column lowered to it, pumping to productive formation of liquid or liquid-gas mixture prepared by using the mixing device the discharge of which is interconnected with flow column, and low and high pressure chambers - with gas and/or liquid sources. According to invention, the pumping of liquid or liquid-gas mixture is performed periodically to the watered-out interval of productive formation. On bottom hole of the well, in annular space between flow column and casing string in the interval above and within the limits of the watered-out part of productive formation there installed are not less than two packers. Annular space in the packer installation interval is filled with non-newtonian fluid. Two circulation valves are installed in flow column. One is installed in watered-out interval of the formation, and the other one - above the upper packer.

EFFECT: increasing operating efficiency of wells at hydrocarbon deposits, the operation of which is complicated with water penetration into deposits.

5 cl, 1 dwg

FIELD: oil-and-gas production.

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EFFECT: reliability growth of operating characteristics of screen, reduction of foam former consumption and gas amount, used for foaming and consumptions for wells drilling.

3 cl, 3 tbl, 1 ex, 3 dwg

FIELD: oil-and-gas industry.

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EFFECT: oil wells oil recovery rate increase due to reservoir physico-chemical treatment.

2 cl, 1 tbl, 24 ex

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to oil-and-gas industry and can be used for water inflow into well limitation methods. According to the method execute high viscosity oil and cement heated mixture pumping via thermal insulated pipes, driving with low viscous oil and process ageing. According to the invention kill the well with well killing fluid, execute works until well specific intake capacity value is equal 0.5-3.0 m3/(h·MPa), pump into the well not less then 8 m3, with density equal well killing fluid density. Execute pumping though thermal insulated pumps of the high viscosity oil and cement heated mixture with consumption rate 2-10 m3/hour.

EFFECT: production wells water inflow insulation efficiency increase.

1 ex

FIELD: oil-and-gas industry.

SUBSTANCE: method of efficiency recovery and stand by wells, with collector of complicated design in abnormally low formation pressure conditions and production string bottom part collapse includes execution of repair-isolation works and reservoir opening. Sweep up the string, repair its compressed bottom, wash in a sand plug till depth of the nearest to a gas-water contact - GWC clay sub layer, descend in to the string a tail from casing pipes of a smaller diametre up to the sand plug head, with the tail head dislocation 20 m above of the reservoir roof, cement the tail with a cement slurry, leaving a cement barrel 1-2 m higher the tails shoe. After cement fixing - CFT drill the cement barrel, wash the sand plug up to the current GWC, through perforation holes with perforation interval 15-20 m3 of the water sealing composition, press it through 3-5 m3 of the cement slurry in to the reservoir, creating water sealing screen and stop over the defined height cement barrels sand plug. After the CFT execute perforation - hydro-sand-jetted or with powerful cumulative perforator - of the production string and the tail in interval over cement barrel head up to the reservoir roof and gas flow activation. The cement slurry contains portlandcement, superplastisiser C-3, polyvinyl alcohol, and polypropylene fiber.

EFFECT: well efficiency recovery and stand by wells operation start up reliability increase.

1 ex, 4 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly to production efficiency increase. The method includes pumping into reservoir, through injection wells system, into zones around wells tall oil with filler - dispor in amount 5-10% of the tall oil and continue watering.

EFFECT: reservoir input profile aligning, oil withdrawal reservoir watering efficiency increase.

2 tbl

FIELD: oil and gas production.

SUBSTANCE: invention is related to gas production industry, in particular to methods for isolation of bottom water influx in gas wells. In method for isolation of bottom water influx in gas wells, including lowering of oil well tubing (OWT), pumping of blocking polymer compound with previously identified value of structural viscosity in annular space, cement isolating substance along OWT, their pushing through with process fluid, lowering of OWT is done down water entry bed, additionally prior to pumping of blocking polymer compound, a low-viscous gel-forming compound is supplied into annular space, which contains the following components, wt %: sodium silicate of "Sialit 30-50" grade 50, liquid waste from process of electrochemical metal coating 0.8, water - the rest, adding the latter to water entry bed, and blocking polymer compound is added to gas-bearing bed, then they are pushed through by pumping of process fluid along OWT with annular space closed, blocking polymer compound is used with a value of structural viscosity that exceeds at least thrice value of structural viscosity of low-viscous gel-forming compound, for headers with high permeability they use polymer compound as blocking polymer compound with organic filler, containing the following components, wt %: lignosulphonate 5, calcium chloride 15, gas condensate 20, peat-alkaline filler 7, technical water - the rest, and for headers with low permeability - polymer compound with condensed solid phase, which contains the following components, wt %: calcium chloride 9, twice-substituted ammonium phosphate 11, water-soluble polymer 2, surfactant 1, technical water - the rest, at the same time volume of blocking compound is defined according to given calculation formula, and pumping of cement isolation compound along OWT is done in volume that exceeds volume of operational pipe in interval of water entry bed by 20%, at the same time pushing of cement isolation compound is started to be done with annular space open, and after it reaches bottom of gas bearing bed, it is pushed with annular space closed with pressure that exceeds pressure of absorption.

EFFECT: development of efficient method for isolation of bottom water influx in gas wells.

2 ex, 2 tbl

FIELD: oil and gas production.

SUBSTANCE: method of recovery of yield and bringing to operation of temporarily shut-in wells with complicated structure of collectors under conditions of abnormally low bed pressure including repair, insulating, and exposure of producing bed consists in following: initially, sand plug is washed for depth 2-3 m below current gas-water contact (GWC); producing string is callipered, shank end out of casing tubes of smaller diametre is lowered into producing string up to head of washed sand plug; head of shank end is arranged 20 m above top of producing bed. The shank end is cemented with cement grout; upon waiting-on-cement completion (WCC) two columns, the producing column and the shank end are perforated in interval below the first over current GWC clay interlayer to depth 2-3 m below current GWC. Water insulating composition at volume 15-20 m3 is pumped through perforated openings made for water insulation; composition is forced through into depth of the producing bed creating a water insulating screen with cement grout of volume 3-5 m3; a cement sleeve 1-2 m above the first over the current GWC clay interlayer is left at the bottomhole. Upon WCC perforating is performed for operation of two columns, the producing column and the shank end in interval above the second over the current GWC clay interlayer up to the top of the producing bed; gas discharge is initiated. Composition containing Portland cement, super-plasticiser C-3, polyvinyl alcohol and polypropylene fibre is used as cement grout; while for perforation either a high-power cumulative perforator or hydraulic jet are used.

EFFECT: insulating fluid entry, ensuring pressure tightness of producing column and additional gas withdrawal from earlier shut-in wells.

1 ex, 4 dwg

FIELD: oil and gas production.

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EFFECT: simplified design, increased reliability, lower accident rate.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes housing with central channel and threads on ends. Main rollers are arranged on axes in cavities on outer surface of housing. Upper ends of axes are installed in housing in a detachable way with possibility of restricted outward movement - to working position, and lower ends - in hinged supports with the possibility of their being turned in cavity passing through longitudinal geometrical axes of housing and rollers. Hydraulic annular piston with sealing rings is arranged in central channel and has pusher which has the possibility of extending the rollers to working position. Upper cavities for additional rollers installed on upper axes are made above cavities of housing. Upper ends of axes interact with housing with possibility of restricted outward radial movement. Pusher is equipped with rotating upper and lower bushes which have the possibility of interacting from inside with additional and main rollers respectively. Recess is made in the housing from inside. Piston above sealing rings is equipped with outward spring-loaded fixture. Between piston and housing there tightly installed above fixture is hold-down bush with possibility of longitudinal downward movement and interaction with fixture to press it inward. Cavity between housing and piston above hold-down bush is interconnected to central housing channel.

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2 dwg

FIELD: gas-and-oil industry.

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EFFECT: raised efficiency, and expanded functionality.

2 dwg

Expander-calibrator // 2394149

FIELD: oil and gas production.

SUBSTANCE: facility consists of case with central channel, threads for connection with downhole equipment and recesses on external surface, wherein there are arranged rollers mounted on axles and made as cylinders with faces. Upper ends of axles perform restricted travel outside when interacting with conic surface of a circular piston, spring loaded upward, installed in the central channel of the case and designed to perform axial displacements. Lower ends of axles are inserted into bushings. The bushings are inserted into the case and perform restricted radial travels outside. The bushings and upper ends of the axles are spring loaded inside the case. The circular piston is equipped with a rod from below. A lower circular piston with upper conic surface interacting with the bushings is installed between the rod and the central channel below recesses. The circular piston is spring loaded from the lower circular piston. A flow section of the central channel of the case narrows from below.

EFFECT: upgraded quality of expanding, increased resource and reliability of facility, elimination of emergencies.

4 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to methods of insulation of troublesome zones at boring and repair of wells with shutters out of profile tubes. It involves preliminary extension of the profiled shutter setting interval with the help of an extension device in the lower part increasing its working diametre by way of pressure drop, connection of profiled pipe sections, the shutter release into the extended setting interval, preliminary rectification of the shutter with excess pressure, successive disconnection of the mandreling device in the upper part from the profiled shutter and its transition to the working position, its final tight pressing to the well walls by way of mandreling in the downward direction during pumping pressure through it till connection with fixation of the specific mandrel to the extension device. After completion of the profiled shutter pressing along the whole length fluid pumping is discontinued and the mandrel with the extension device is lifted to the surface.

EFFECT: process simplification, quality and reliability improvement, shutter setting time reduction, reduction of energy and financial expenditures.

6 dwg

Pipe flaring device // 2392415

FIELD: oil and gas industry.

SUBSTANCE: invention relates to drilling wells and in particular is intended for flaring profiled pipes and their installation inside wells. The device contains a housing with a central channel, threads for connection to well equipment and indentations on the outer surface wherein rollers are arranged mounted on axles whose lower ends are mounted onto supports arranged in the housing on pivots so that to enable their turning within the plane passing through the longitudinal geometric axes of the housing and the rollers with the upper ends fixed in radial grooves of the housing so that to enable their limited relocations forward. In the housing central channel a hydraulic ring piston is arranged, spring-loaded in the axial direction and having a pusher whose outer surface is conic shaped. The rollers on the outer surface have recesses. The pusher is positioned at the piston bottom so that to enable rotation and interaction inside with the rollers outer surface with its conic surface that has projections to match the rollers recesses.

EFFECT: improved flaring quality, extended useful life of the rollers.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to gas-and-oil producing industry, particularly to methods and devices for hermetic sealing of a casing pipe in a well. The device comprises upper and lower seats with a number of moulding sectors in-between to perform constrained radial movement, a diaphragm made of an elastic material provided in the moulding sectors and having a cavity filled with an incompressible flexible medium. The moulding sectors can perform constrained movement inside in the radial direction. The cavity of the diaphragm is connected with a self-contained elastic compensator enabling a permanent backup for the medium in the diaphragm directly or through a piston mounted over a diaphragm. The self-contained elastic compensator can be represented with a compressed gas tank connected with the cavity of the diaphragm. Said incompressible fluid medium in the diaphragm can be an elastic material, and the self-contained elastic compensator can be designed as said compressed gas tank connected with a piston supported by the elastic flexible material. According to the second version, the compensator is provided to maintain the permanent backup for the medium in the diaphragm.

EFFECT: simplified technology, extended application.

21 cl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: offer concerns gas-and-oil producing industry, particularly methods of troublesome zone isolation in well drilling with shutters of shaped tubes. The method involves connection of shaped pipe joints, lowering of the shutter in the troublesome zone, pressure straightening of the shutter and expansion to dense tight pressing to well walls, tight connection of the shaped pipe joints with their pin ends comprising an external surface narrowed to an end face and supplied with collars, and a coupling end comprising an internal surface extended to the end face and supplied with internal ring samples for pin collars. Besides the method implies machine fit and fixation with a ring enclosing the coupling end. The coupling end representing a taper socket with an internal seat is pressed out along the external surface of the pin end of the other shaped pipe joint in the form of the external taper surface by moving along the external surface to an end face of the ring with fixing the collars of the pin end in the samples of the coupling end of the matched shaped pipe joints.

EFFECT: reduced production costs, simplified design, and improved reliability of troublesome zone closing.

3 dwg

Pipe flaring device // 2387801

FIELD: oil and gas production.

SUBSTANCE: device includes a body with the centre passage, downhole equipment thread, and primary and upstanding additional recesses on an external surface wherein there are main and additional rollers respectively. The additional rollers are parallel or slightly deviated from the parallelism to the central axis of the device. The rollers rotate on the main and additional axes respectively. An upper end of the main axis is detachably connected at an angle to a lower end of the additional axis. The lower end of the main axis is arranged in a hinge and turns in a plane passing through the longitudinal geometrical axes of the body and the main and additional rollers. The upper end of the additional axis is detachably fixed in the body.

EFFECT: improved flaring efficiency and reliability, lower material inputs.

1 dwg

Pipe flaring device // 2387800

FIELD: oil and gas production.

SUBSTANCE: pipe flaring device comprising a hollow rod in the form of a cone narrowed downwards with union and pin threads, a windowed body rotatable and boundedly longitudinally movable in relation to the rod cone, the rollers mounted in the windows of the body and inclined to the axis of the rod, interacting with the rod and comprising cylinders equipped in its bottom part with radial facets. And from the top, the cone the hollow rod has a cylinder with a screw trapezoid flute with its inclined surface turned upwards, and from beneath is comprises a cylindrical sample; the body above the windows is equipped with a stopper load-assisted from inside and interacting with the screw flute and the cylindrical sample.

EFFECT: simplicity in manufacturing and assembly that ensures preventing the emergencies.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has serially connected assemblies, including bodies, central passing channels and dies. Rods are placed in central passing channels and interacts with dies by means of pushers. Dies are fixed in slanting grooves of body. Rods of upper assemblies are spring-loaded to hold dies in non-operating position, and of lower ones - to force dies to operating position.

EFFECT: higher reliability and efficiency.

2 cl, 5 dwg

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