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Packing device of additional casing column

IPC classes for russian patent Packing device of additional casing column (RU 2254442):

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

Another patents in same IPC classes:

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.

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 / 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: 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

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.

Known pokerwise device consisting of a deformable body with elastic cuff and extends node located inside the housing, and the locking mechanism (utility model. RF patent №32182, MKI 7 E 21 33/12, 2003).

The drawbacks:

- inability to create a significant load on the sealing element, which is limited by the capacity of the tower and opportunities hoist;

- for deep wells while tightening tool may work "the effect of the spring, which will lead to an emergency situation.

The closest in technical essence to the present invention is pokerwise additional unit casing containing a deformable body with elastic cuff and extender, boarding tool, including gidrotamir formed by a rod with a piston and cylinder with lid, anchor node, comprising a housing defined therein dies (utility model. RF patent №35124, MKI 7 E 21 33/12, 2003).

The drawbacks:

- the complexity of the design due to cash what chii large number of components and parts;

- if additional casing was leaking, it will be impossible to raise the pressure in the hydraulic cylinder to the required size, which will lead to emergency situations;

- in case of insufficient axial force up shear ring 17 can not be destroyed, which will lead to emergency situations;

- if during the installation of the device, the lower part will be tilted, broken alignment between the axis of the funnel 9 and the axis of the additional casing that will prevent actuation of the device.

Object of the invention is a device having a simplified construction and having improved reliability and performance.

This problem is solved proposed patrolsim device additional casing containing a deformable body with elastic cuff and extender, boarding tool, including gidrotamir formed by a rod with a piston and cylinder with lid, anchor node, comprising a housing defined therein dies.

What's new is that the extender is located in the upper part of the deformable body, and the anchor node above hydrochory, the cylinder cover is mounted for movement relative to the rod and has at the lower part of the cap with the annular stop interacting with what assyrianism; the body of the anchor node with the outer side is provided with radial cylindrical sockets that have sprung die, communicating through channels with the internal space of the device.

The drawing shows the proposed device in longitudinal section lowered into the well.

The device consists of a housing 1 made in the form of a pipe from an easily deformable material, elastic cuffs 2, phumiwasana to the outer surface of the shell and expander 3.

The device includes a planting tool including a rod 4 with the piston 5, the cylinder 6 with the cover 7, forming gidrotamir 8. In the upper part of the cylinder there are channels 9, and its lower portion provided with a hollow plug 10 with the annular stop 11.

The stem 4 of the upper part connected to the housing 12 of the anchor node. The body is made of radial cylindrical socket 13 into which is inserted the spring plates 14. Channels 15 nests are communicated with the internal space of the device.

The mating surfaces of the parts provided with sealing rings 16. The housing 1 of the device and additional casing column 17 are interconnected by a coupling 18.

The device operates as follows.

After exploring the old casing 19 inside it for extra casing 17 (colon collar without coupling to maximize the use of the Finance section of the old columns) down pokerwise node device so as in order elastic cuff 2 was below the violations in column 19, and hermetically fixed to the flange 20 on the flange 21 of the column 19. Then in column 17 on the tubing (tubing) 22 lower landing tool with the anchor node up until the focus ring 11 is seated on the upper end of the expander 3. The weight indicator at the wellhead will be recorded by reducing the load on the tubing. Then unload tubing. Under load the expander 3 is moved down to a certain length, extends the housing 1 and presses the cuff 2 to the walls of the casing 19. As well as the load of the weight of the tubing for a complete spacerace, as a rule, is not enough, create an additional burden. For this tubing to increase the pressure, under the influence of which the die 14 is moved in the slots 13 and embedded in the wall of the casing 19 and thereby anchors the tubing.

Excessive pressure at the same time applies to gidrotamir 8, under the influence of which on its cylinder 6 and, accordingly, the expander 3, an additional load (which can vary widely), there is a further movement of the expander 3 down and pressed against the housing 1 and the cuff 2 to the walls of the casing 19. After that, the pressure drop, under the influence of the springs 23 of the die 14 is returned to its original position. Boarding tool, and Yak the RNA site raise to the surface.

If the stroke of the cylinder 6 is not enough for a full Petrovci, at the bottom position of the cylinder 6, the pressure drop, while the die 14 depart from the casing 19, then unload again the tubing, then again create excessive pressure, after which zakalivanie and final Petrovka.

The proposed device is substantially simpler in construction than known, and allows you to create a significant load Petrovka. All components and parts of the device are increased reliability and efficiency.

Pokerwise additional unit casing containing a deformable body with elastic cuff and extender, boarding tool, including gidrotamir formed by a rod with a piston and cylinder with lid, anchor node, comprising a housing defined therein dies, wherein the extender is located in the upper part of the deformable body, and the anchor node above hydrochory, the cylinder cover is mounted for movement relative to the rod and has at the lower part of the cap with the annular stop interacting with the extender; the body of the anchor node with the outer side is provided with radial cylindrical sockets that have sprung die, communicating through channels with the internal space is the your device.