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Packing device of additional casing column. RU patent 2254441.

IPC classes for russian patent Packing device of additional casing column. RU patent 2254441. (RU 2254441):

E21B33/12 - Packers; Plugs (used for cementing E21B0033134000, E21B0033160000)

Another patents in same IPC classes:

Packer / 2251614
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.

Self-detaching bidirectional action packer with electromechanical drive / 2250351
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.

Two-packer device / 2249669
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.

Device for isolation operations in wells / 2249094
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.

Device for isolating inter-tubular space in the well / 2247223
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.

Packer testing stand / 2247222
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.

Mechanical packer system / 2246604
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.

Packer / 2245986
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.

Packing device of additional casing column / 2254441
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.

Packing device of additional casing column / 2254442
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.

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

The invention relates to the oil and gas industry, namely to remedy casing from exposure to high pressure, and can be used when descending additional casing strings in the well, the casing of which have become unfit for use.

Famous ″Packer (RF patent No. 2215864, IPC 7 E 21 33/12, publ. BI No. 31 dated 10.11.2003), including lowered on the column tubing (tubing) hollow upper and lower housings attached to the lower end of the housing extensible nozzle with a sealing element placed on its surface, in the form of an elastic membrane, a mandrel mounted in the housing, and a hydraulic chamber, with its expandable pipe is made with an outer annular ledge, above which is located the anchor section with teeth, notches, and below the sealing element, the upper part of which is in contact with the conical surface of the annular protrusion, and the lower end is made in the form of a dovetail and in a compressed state is placed in a glass-centralizer attached to the lower end of the housing, the mandrel is provided with a detachable valve is made hollow and the two-stage and placed in the upper body, with the possibility of jamming the second stage in the area of the annular protrusion extensible pipe when it is installed, and the hydraulic chamber of the OBR is avana housing, the cavities of the mandrel with the valve and tubing.

The disadvantages of this device are:

first, to set the packer requires a high pressure planting (for steel expandable socket 40 MPa for aluminum - 25 MPa), during which the column tubing (tubing), which descends packer, lengthened;

secondly, when removing the pressure planting column tubing is compressed with great force (depending on the pressure applied from 15 to 35 tons)that can lead to failure of the packer.

Known ″Pokerwise device (St. a useful model of the Russian Federation No. 26075, IPC 7 E 21 33/12, 2002), containing the main packer, including a body placed on the outer surface of the elastic sleeve, a movable wedge cylinder associated with the actuator, the cutting and sealing elements and stops, the device is equipped with an additional packer, consisting of a body, connected through the sub with the main body of the packer, with put on him, elastic cuff, a movable wedge cylinder forming with the body and a ledge on the outer surface of gidrotamir connected through radial channels in the case of in-line space.

The drawbacks are a large number of complex parts, which are available in additional casing remains in each well is e, that increases the cost of construction and the need to manufacture a large number of technologically complex parts, which leads to higher use.

The closest in technical essence and the achieved result to the present invention is ″Pokerwise additional unit casing (for a utility model Patent of the Russian Federation No. 32182, IPC 7 E 21 33/12, publ. Bull. No. 25 dated 10.09.2003,), comprising a housing made in the form of pipe installed on it with an elastic cuff that extends the node, including cone and shear element, the housing is deformable element and is supplied with the lower end of the concave section extending Assembly is mounted inside the housing, and the taper outer surface tightly against vagotomy section and provided with a bottom on the inner side of the cylindrical sample, which is rigidly mounted intermediate sleeve, the said Assembly is provided with a funnel with a conical and cylindrical sections on the inner surface, abutting against the end face of the cone and having two cylindrical sample, the upper contact with the upper area of the inner surface of the cone, and the bottom rigidly connected with locking sleeve from the inner annular protrusion, and the shear element is installed between the ends of the above-mentioned sleeves and ledges cylindrical sampling cone and funnel, NR the internal diameters of the cylindrical section of the funnel and the annular protrusion of the locking sleeve is selected under the diameter locking mechanism mounted on the lower end dipped in the additional casing tubing (tubing) and is supplied from the lower end of the annular bore, in which is rigidly mounted a sleeve with a tapered outer cut in the upper part, and in the area of the tapered cut is tapered split ring, interacting in working position with the annular protrusion of the locking sleeve, additional casing at the wellhead is rigidly connected to the wellhead.

The drawbacks:

first, the design complexity, due to the presence of a large number of components and parts;

secondly, mechanical Petrovka leads to greater efforts planting (for aluminum pipe - 15-17 tons, steel - 35-40 tons), which compresses the additional casing, which descends pokerwise device;

thirdly, the ability to use the device is limited to the technical characteristics of the lifting towers;

fourthly, when the force is removed landing when removing the additional pressure column is returned in original condition with great effort (depending on efforts from 15 to 40 tons), which may lead to disruption from the landing corps after installation.

An object of the invention is a device, about the fact and reliable in use, structurally, cheap, by reducing the number of technically complex parts and removing the load from the additional casing string during landing pokerwise device.

The technical problem is solved by the proposed patrolsim device additional casing string, comprising a housing made in the form of pipe installed on it with an elastic cuff that expands the node with the cone, shear element, the mechanism, the descent on the string of pipe in the additional casing and acting from above on expanding the node.

What's new is that expanding the site is located in the pipe at the top and fixed cone down, while the mechanism is in the form of a plunger at the bottom and the anchor node at the top, and the pusher are made in the form of a cylinder, made with the possibility of pressure from above with the expansion node and is equipped with a piston and a hollow piston rod, which is connected with a piston rigidly, but with the column pipe is sealed with the possibility of axial movement upwards, while the anchor node is made in the form of dies mounted on the hollow shaft with the possibility of radial movement outward when moving the hollow stem to the top of the tubing, the cutting element fixes the hollow stem relative to the tubing while running in the hole.

The drawing shows the proposed device in predolin the m section.

Pokerwise additional unit casing 1 includes a housing 2 made in the form of a pipe 3 with a pre-installed elastic cuff 4, extends node 5 with cone 6, the cutting element 7, the mechanism 8, the descent on the string of pipe 9 in the additional casing 1 and communicating extends downward from the node 5. Expanding the node 5 is located at the top and fixed cone 6 down in the pipe 3. Mechanism 8 is made in the form of a plunger 10 at the bottom and the anchor node 11 at the top. The plunger 10 is made in the form of a hydraulic cylinder 12 made with the possibility of down pressure on expanding the node 5 with the piston 13 and the hollow shaft 14, which is connected to the piston 13 rigidly, but with the column pipe 9 is sealed with the possibility of axial movement upwards. The anchor node 11 is made in the form of plates 15 mounted on the hollow shaft 14 with the possibility of radial movement outward when moving the hollow shaft 14 to the top of the tubing 9. This can be accomplished, for example, by using the stop 16 of the column pipe 9 and a collar of the pusher 17 of the hollow shaft 14, which die 15 interact using the T-shaped connection and/or connection ″dovetail in any combination, for example with wedge pusher 17 - using ″dovetail″and focusing the 16 - using a T-shaped connection. Shear element 7 detects hollow W is OK 14 relative to the pipe string 9 during the descent into the well 18. Unauthorized overflows of liquid in the device is prevented by the sealing rings 19 and 20.

The device operates as follows.

After researching the production casing 18 inside her additional casing 1 down pokerwise device so that case 2 was below the violations (not shown) in the production string of a well 18. Additional casing 1 is sealed and rigidly fixed to the mouth 21 of the bore 18. Then in the additional casing 1 lower column pipe 9 with the mechanism 8 on the lower end until the plunger 10 by a hydraulic cylinder 12 will not rely on expanding cone 4 (determined by reducing the weight of the column of pipes 9). To achieve settlement efforts destroyed shear element 7, causing the anchor node 11 in action. As a result, the stop 16 of the column pipe 9 is moved down relative to the expanding node 5 and the hollow shaft 14 with the wedge pusher 17 - up relative to the tubing 9, pushing the die 15 to compress their gear part to the additional casing 1. This hollow rod 14 is fixed relative to the additional casing 1. Then in the column pipe 9 create excessive pressure through the hollow shaft 14 is transmitted under the piston 13 in the cylinder 12, which is due to the fixation of the hollow ø the eye 14 is moved down, putting pressure on expanding the node 5. This extends the node 5 cone 6 extends the pipe 3 to the pressing elastic cuffs 4 additional casing 1, the insulating annulus 22 from line 23, the insulating violations of the production casing 18. After passing through the pipe 3 extends node 5, it falls to the bottom hole (not shown) in the well 18. As a result, the pressure inside the tubing 9 first drops sharply as a support for the hydraulic cylinder 12, and then increases sharply after the hydraulic cylinder 12 will rest against the piston 13. The installation process pokerwise device additional pipe string 1 is completed. Pressure is discharged into the string of pipe 9, which rises in the hollow rod 14 is moved down relative to the tubing 9, the V plunger 17 and the stop 16 are moved apart, the die 15 disengage from the additional casing 1. Then the string of pipe 9 with the mechanism 8 is pulled out of the bore 18. Since the force created by the hydraulic cylinder 12 during expansion of the pipe 3, is balanced by the anchor node 11, the additional casing is not extended. As a result, after passing through the pipe 3 extends node 5 on the housing 2 pokerwise device after installation do not apply great efforts that can break, that is, to break the air-tightness is ü connection with the casing of the well.

Offer pokerwise additional unit casing is simple and cheap in manufacture and use with a small number of parts, most of which can be used several times, thus reliably due to the lack of stress that violate the integrity once it is installed.

Pokerwise additional unit casing, comprising a housing made in the form of pipe installed on it with an elastic cuff that expands the node with the cone, shear element, the mechanism, the descent on the string of pipe in the additional casing and cooperating on top of the extender node, wherein expanding the site is located in the pipe at the top and fixed cone down, while the mechanism is in the form of a plunger at the bottom and the anchor node at the top, and the pusher are made in the form of a cylinder, made with the possibility of down pressure on expanding the site and include a piston and a hollow piston rod, which is connected with a piston rigidly and with the column pipe is hermetically sealed with the possibility of axial movement upwards, while the anchor node is made in the form of dies mounted on the hollow shaft with the possibility of radial movement outward when moving the hollow stem to the top of the tubing, the cutting element fixes the hollow shaft relative to the Onna pipes during the descent into the well.