CN210564459U - Drillable and recyclable suspension packer - Google Patents

Abstract

The utility model discloses a but drill recovery type hangs packer, including center tube, packing element, slips mechanism, equal suit of packing element and slips mechanism is at the center tube outer wall, and the packing element is withstood to slips mechanism upper end, the top connection of center tube upper end screw thread formula, the bottom connection is connected to center tube lower extreme screw thread formula, still includes urceolus, soluble locking piece, the same cover of urceolus is outside at the center tube, and constitutes the annular space between the center tube, the slips mechanism is withstood to the urceolus upper end, and the urceolus lower extreme passes through shear pin and lower clutch connection is fixed, the slips that soluble locking piece will slips mechanism holds in the palm and the center tube locking is fixed. The design structure of the soluble locking block is used for putting in a common fishing tool and pulling out the pipe column at one time. The drilling and milling can be carried out, and the drilling and removing rate is high.

Description

Drillable and recyclable suspension packer

Technical Field

The utility model belongs to the technical field of be used for vertical well or horizontal well to hang completion technology and specifically relates to a drillable and recyclable hangs packer.

Background

The packer is an important downhole tool for realizing oil and gas field exploitation, can provide an effective mechanical means for normal production and various downhole operations of an oil and gas well, and is widely applied to layered water injection, layered transformation and layered oil extraction of an oil field. The suspension packer is one of packers, has the functions of suspension and sealing, and is mainly used in suspension well completion processes of vertical wells and horizontal wells. In the sand control type suspended well completion process, a sand control screen is generally connected below a suspended packer. Under normal production condition, hang the packer and can persist in the well forever, when needs carry out secondary operation to the intraductal, the deblocking of unfreezing of packer is the more complicated problem of a technology, and it is mainly to have the back-off deblocking and lift the tubular column unfreezing two kinds of modes of unfreezing, and the back-off deblocking is because the tubular column detains the type under the stress state, and the moment of torsion is difficult to transmit, causes the difficulty of unfreezing. When the pipe column is lifted upwards for deblocking, a special throwing and fishing tool is needed, and the throwing and fishing tool is complex. The more serious condition is that the packer cannot be unlocked at all due to the long well-leaving time, scaling, sand burying and the like of the packer, at the moment, an operation team is often required to perform salvage or major repair and the like, the operation time is long, and the cost is high.

Application No.: 201510355424.4 provides a packer, which relates to the field of downhole layered oil production tools and achieves the purpose that one-time well entering can complete multiple setting. The main technical scheme adopted is as follows: the packer comprises a mandrel, a rubber barrel assembly, a cone, a slip assembly, a lock pin assembly and an unloader, wherein the upper end and the lower end of the mandrel are respectively provided with an upper joint and a lower joint. The mandrel is used for being sleeved outside the central tube. The rubber cylinder component is connected with the lower part of the mandrel through a lower joint. The cone, the slip assembly and the lock pin assembly are sequentially far away from the rubber cylinder assembly and are arranged on the lower portion of the mandrel in a sliding mode. And a bent sliding track for guiding the sliding direction of the lock pin assembly is arranged at the position of the lower part of the mandrel, which corresponds to the lock pin assembly. The lower part of the mandrel and the cone are both provided with pressure transmission holes. The unloader comprises a first sub unloader and a second sub unloader detachably connected with the first sub unloader; the first sub-unloader is connected with the upper part of the mandrel through an upper joint; and a second sub-unloader adjacent to the rubber cylinder assembly is slidably mounted on the upper part of the mandrel.

Application No.: 201611214776.9 provides a chemical unset compression type slip fracture packer. This chemistry deblocking compression slips fracturing packer includes: the device comprises an upper joint, a central pipe, an intermediate joint, a slip assembly, a rubber cylinder assembly, an unsealing joint, a piston assembly and a lower joint; the upper joint, the central pipe, the middle joint and the lower joint are fixedly connected in sequence; the slip assembly, the rubber cylinder assembly, the deblocking joint and the piston assembly are sequentially abutted, and the slip assembly is abutted with the upper joint; the piston assembly is sleeved on the outer sides of the central pipe, the middle joint and the lower joint, the upper end of the piston assembly is hermetically connected with the central pipe, and the lower end of the piston assembly is hermetically connected with the lower joint. The invention also provides a method for packing and unpacking by using the chemical unpacking compression type slip fracturing packer. The chemical deblocking compression type slip fracturing packer is simple in structure, convenient to install and construct and operate and capable of achieving automatic deblocking.

Application No.: 201410415171.0 discloses anchor packer capable of taking and drilling, including top connection, interior center tube, outer center tube, lower clutch, release mechanism is including the release shear pin seat, the shear pin seat is connected with the last slip seat of slips mechanism through the release shear pin, sets gradually slips mechanism, packing element seal assembly, setting mechanism outside the outer center tube to the top down, upward release separates the card mechanism and includes setting up at the outer flange of center tube lower extreme, first deblocking pin including, the outer flange passes through sealing washer and the sealed configuration of outer center tube inner wall, the external diameter of outer flange is greater than release shear pin seat internal diameter, the last slip seat of slips mechanism is fixed to be set up on the top connection through first deblocking pin. The invention has simple operation and reasonable structure, integrates anchoring and sealing, reduces sealing elements in the pipe column and leakage possibility compared with the conventional pipe column tool, has the functions of lifting, releasing and releasing the stuck pipe, releasing the stuck pipe and drilling and milling, reduces stuck pipe releasing difficulty and saves construction time and cost.

Application No.: 201420474951.8 discloses a can get and bore one-way slips and support formula packer, its characterized in that it includes top connection, last center tube, lower clutch, packing element, go up overcoat, centrum, slips, slip seat, overcoat, locking mechanism, the shear pin seat that connects gradually from top to bottom, the shear pin seat is fixed on the lower clutch through sitting to seal the start pin, is equipped with first pressure transmission hole at the lower extreme of last center tube, and this first pressure transmission hole is linked together with the inner wall of last overcoat, is provided with the piston at the lower extreme of slip seat, and this piston setting is in the annular space between the outer wall of center tube and the overcoat down under and, and the lower extreme of center tube is provided with the second and passes pressure transmission hole and is linked together with the piston under, the slips be one-way decurrent slips. The utility model discloses can normally work under high temperature high pressure condition, can be through the mode deblocking that lifts, can adopt milling tool to clear away it after the tubular column meets the card again. The method has the characteristics of simple operation, strong universality, high reliability and the like.

Application No.: 200520117813.5A dual-center-pipe drillable packer comprises a center pipe, an upper pressing sleeve, an upper slip, an upper cone, a male expansion ring, a female expansion ring, a rubber cylinder seat, a rubber cylinder, a lower cone, a lower slip and a lower joint, wherein the middle part of the center pipe is sleeved with the rubber cylinder; the central tube at the bottom end of the rubber cylinder is sleeved with a rubber cylinder seat, a female expansion ring, a male expansion ring, a lower cone, a lower slip and a lower joint from top to bottom. The utility model discloses rational in infrastructure and compact, convenient to use utilizes this two center tube drillable packer, makes the activity cycle short to reduce the running cost, improved the efficiency of construction, both can be applicable to the equal diameter sleeve pipe, also can be suitable for the combination diameter sleeve pipe.

Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, to the utility model discloses more technical characteristics and the technical problem and the beneficial effect that will solve all do not have the technological inspiration in the above technical document that discloses.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but brill recovery type hangs packer, reasonable in design is ingenious, and easy operation is reliable. The design structure of the soluble locking block is used for putting in a common fishing tool and pulling out the pipe column at one time. The drilling and milling can be carried out, and the drilling and removing rate is high.

In order to achieve the purpose, the utility model discloses a following technical scheme, a but drillable recovery type hangs packer, including center tube, packing element, slips mechanism, equal suit in center tube outer wall of packing element and slips mechanism withstands the packing element in the slips mechanism upper end, the top connection is connected to the screw thread formula in center tube upper end, and the bottom connection is connected to center tube lower extreme screw thread formula, still includes urceolus, soluble locking piece, the urceolus is the same cover outside the center tube, and constitutes annular space between the center tube, the slips mechanism is withstood to the urceolus upper end, and the urceolus lower extreme is connected fixedly through shear pin and bottom connection, the slips of slips mechanism is held in the palm and the center tube locking is fixed to soluble locking piece.

The slips mechanism comprises a cone, slips and a slip support, wherein the cone is fixedly connected with a central pipe through an upper shear pin, the slips is located below the cone, the slips and the cone are respectively provided with matched conical surfaces, the upper end of the slip support supports the lower end of the slips, the slip support is provided with a radially through locking block hole, the outer wall of the central pipe is provided with a locking block groove, a soluble locking block is installed in the locking block hole and the locking block groove, namely, the outer end of the soluble locking block extends into the locking block hole, and the inner end of the soluble locking block extends into the locking block groove and simultaneously holds the slips support and the center to be locked.

And a gap at least axially penetrating from the locking block groove to the upper port of the slip retainer is formed between the inner wall of the slip retainer and the outer wall of the central pipe.

The outer wall of the central tube is provided with an axial limiting outer clamping table, the inner wall of the cone is provided with a clamp deblocking axial stroke groove, and the axial limiting outer clamping table and the clamp deblocking axial stroke groove are axially limited mutually; the upper end surface of the lower connector axially limits the lower end surface of the slip support, and the axial distance from the upper end surface of the lower connector to the lower end surface of the slip support is consistent with the axial length of the axial stroke groove for deblocking.

The central tube is further sleeved with a push ring, a push cylinder and a locking ring, the lower end of the push cylinder abuts against the upper end of the rubber tube, the upper end of the push cylinder abuts against the lower end of the push ring, the upper end of the push ring abuts against the lower end face of the upper connector, the locking ring is installed inside the push ring, an inner horse-tooth buckle is arranged on the inner wall of the locking ring, an outer horse-tooth buckle is arranged on the outer wall of the central tube, and the inner horse-tooth buckle of the locking ring is connected to the outer horse-.

The quantity of packing element sets up 2 at least, and the packing element is two-tenth between the installation spacer ring.

The upper end of the slip support is provided with an outer convex edge, the outer barrel sleeves the lower half section of the slip support, the upper end face of the outer barrel abuts against the lower end face of the outer convex edge, the locking block hole is formed in the lower half section of the slip support, and the inner wall of the outer barrel is used for radially limiting the soluble locking block.

Compared with the prior art, the utility model following beneficial effect has:

(1) the drillable and recyclable hanging packer has reasonable and ingenious structural design and simple and reliable operation. (2) The design structure of the drillable and recyclable soluble locking block of the suspension packer is used for putting a common fishing tool into the packer and can be used for taking out a pipe column at one time. (3) The drillable and recyclable suspended packer can be used for drilling and milling, and the drilling and removing rate is high.

The tool mainly comprises a composite material part and a metal material part. The locking block is made of soluble materials, and the quick releasing and deblocking of the packer can be realized by applying the mechanism. When the suspended packer slips cannot be unlocked due to reasons such as sand burying and the like, the casing milling is carried out on the tubular column, and quick unlocking and unlocking of the packer can be realized.

Drawings

Fig. 1 is the utility model discloses a structure schematic diagram of a drillable and recyclable hanging packer.

In the figure: 1-upper joint, 2-central tube, 3-push ring, 4-locking ring, 5-push cylinder, 6-upper rubber cylinder, 7-spacer ring, 8-lower rubber cylinder, 9-cone, 10-shear pin, 11-slip, 12-slip holder, 13-soluble locking block, 14-outer cylinder, 15-shear pin and 16-lower joint.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

the utility model provides a but bores recovery type and hang packer, includes center tube 2, packing element, slips mechanism, packing element and the equal suit of slips mechanism are at 2 outer walls of center tube, and the packing element is withstood to slips mechanism upper end screw thread formula, and top connection 1 is connected to center tube upper end screw thread formula, and bottom connection 16 is connected to center tube lower extreme screw thread formula, still includes urceolus 14, soluble locking piece 13, the urceolus is the same cover outside the center tube, and constitutes the annular space between the center tube, the slips mechanism is withstood to 14 upper ends of urceolus, and the urceolus lower extreme is connected fixedly with the bottom connection through shear pin 15, soluble locking piece holds in the palm and the center tube locking of slips mechanism is.

The slips mechanism includes cone 9, slips 11, slips support 12, the cone passes through shear pin 10 and is connected fixedly with the center tube, the slips is located the cone below, the slips sets up the matched with conical surface separately with the cone, the slips holds in the palm the upper end bearing and holds in the palm the slips lower extreme, the slips holds in the palm sets up radial lock piece hole that link up, and the lock piece groove is seted up to the center tube outer wall, soluble lock piece 13 is installed in lock piece hole and lock piece inslot, promptly in the lock piece hole is stretched into to soluble lock piece outer end, inner stretches into the lock piece inslot, holds in the palm the slips with central quick locking simultaneously.

And a gap at least axially penetrating from the locking block groove to the upper port of the slip retainer is formed between the inner wall of the slip retainer and the outer wall of the central pipe. The liquid in the sleeve enters the slip holder to melt the soluble locking block.

The outer wall of the central tube 2 is provided with an axial limiting outer clamping table, the inner wall of the cone 9 is provided with a card deblocking axial stroke groove, and the axial limiting outer clamping table and the card deblocking axial stroke groove are axially limited with each other; the upper end surface of the lower connector axially limits the lower end surface of the slip support, and the axial distance from the upper end surface of the lower connector to the lower end surface of the slip support is consistent with the axial length of the axial stroke groove for deblocking. The cone, the slip support and the like are prevented from being taken off from the central tube, and the axial stroke is certain, so that the clamping and the unsealing are convenient.

The central tube is further sleeved with a push ring 3, a push cylinder 5 and a locking ring 4, the lower end of the push cylinder props against the upper end of the rubber tube, the upper end of the push cylinder props against the lower end of the push ring, the upper end of the push ring props against the lower end face of the upper connector, the locking ring is installed inside the push ring, an inner jaw buckle is arranged on the inner wall of the locking ring, an outer jaw buckle is arranged on the outer wall of the central tube, and the inner jaw buckle of the locking ring is connected to the outer jaw buckle of the central. The teething of the locking ring is well known in the art.

The quantity of packing element sets up 2 at least, and the packing element is two-tenth between the installation spacer ring.

The upper end of the slip support 12 is provided with an outer convex edge, the outer cylinder 14 sleeves the lower half section of the slip support, the upper end surface of the outer cylinder props against the lower end surface of the outer convex edge, the locking block hole is formed in the lower half section of the slip support, and the inner wall of the outer cylinder radially limits the soluble locking block. Before the shear pin 15 is sheared, the outer cylinder can firmly drag the slip holder and prevent the soluble locking block from falling off.

The upper joint and the lower joint are connected with a central pipe through thread buckles, the upper portion of the central pipe is provided with tooth-shaped teeth, a locking ring can move downwards on the tooth-shaped teeth, the locking ring is sleeved in an upper blocking ring, the upper blocking ring, a pushing cylinder and a rubber cylinder are sleeved on the central pipe, an upper cone is connected with the central pipe through a shear pin, a slip is fixed on a slip support and sleeved on the central pipe, the slip support is connected with the central pipe through a locking block, and an outer cylinder is connected with the lower joint through the shear pin.

The upper part of the central tube can be connected with a releasing tool. The releasing tool can be designed into a trapezoidal buckle, a groove and the like.

The length of the tooth-shaped teeth on the outer side of the upper part of the central tube is larger than the sum of the setting distance and the hanging distance. The tooth-shaped teeth face to the direction of the rubber tube.

The middle part of the cone is provided with a groove, and the length of the groove is larger than the moving distance of the cone when the cone is completely wedged into the slip.

The locking block is made of soluble materials, the soluble materials are made of alloy materials such as magnesium, aluminum, nickel and the like, the locking block can keep high strength within 20 hours in oil-water mixed liquid and can be completely dissolved within 48-240 hours, and the locking block can be cylindrical or blocky and is used for connecting the central pipe and the slip holder. The designed slope angle of the cone part is consistent with the angle of the inner side of the upper part of the slip.

The central tube is fixedly connected with the upper setting releasing tool, the upper retaining ring, the push ring and the locking ring are sequentially connected with the central tube through threads, the double rubber sleeves are sleeved on the central tube, and the lower push sleeve is fixedly connected with the upper cone. The slips are sleeved between the upper cone and the lower cone. The lower cone is fixedly connected with the lower joint through the shear pins. The lower joint is fixedly connected to the lower sand control tool.

The slips are firmly clamped between the upper cone and the slip support, so that the slips can be prevented from being jammed midway in the process of running.

The baffle ring is connected to the central pipe through a thread buckle, the lower end of the baffle ring is provided with a certain chamfer, and the angle of the chamfer is consistent with that of the chamfer close to the lower joint.

The pieces 3,5,7,9,16 are machined from a drillable composite material made from a fiber/epoxy material. The member 14 is machined from an alloy material containing magnesium, aluminum, and nickel.

According to the specific implementation mode, the pipe column is connected well according to the structure and the design of the pipe column, the pipe column is put into a well, pressurization is carried out, the setting releasing tool pushes the push ring, the push ring pushes the push cylinder and the lock ring, the push cylinder compresses the rubber cylinder, the rubber cylinder pushes the cone, the shear pin 10 is broken under pressure, the cone pushes the slip, the slip is clamped on the inner wall of the sleeve, the setting hanging is carried out, the sealing hanging work is finished, and normal production is carried out. When the later-stage operation is needed, the locking block is completely dissolved at the moment, the central pipe and the slip support lose the locking relation, the common fishing spear is downwards put in to fish the upper joint, the shear pin 15 is cut off, and the outer barrel is released. The central tube is lifted upwards relative to the slips and the slip support, the slips are unlocked, the rubber sleeve is unlocked, the tubular column is lifted up at one time, and the whole tubular column can be fished out. When the suspended packer is not completely deblocked and deblocked due to sand blocking and the like, the suspended packer is milled in a sleeving manner, and the suspended packer is completely an easily drilled composite material part and a rubber sleeve except the slip in the outer side of the suspended packer, so that the milling in the sleeving manner is easy, the suspended packer can be completely deblocked and deblocked, and finally the tubular column can be taken out at one time by lifting the tubular column.

In the description of the present invention, it should be understood that the orientation indication or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a but bores recovery type and hang packer, includes center tube, packing element, slips mechanism, equal suit of packing element and slips mechanism is at the center tube outer wall, and the packing element is withstood to slips mechanism upper end, the top connection of center tube upper end screw thread formula, the bottom connection is connected to center tube lower extreme screw thread formula, and its characterized in that still includes urceolus, soluble locking piece, the same cover of urceolus is outside at the center tube, and constitutes the annular space between the center tube, the slips mechanism is withstood to the urceolus upper end, and the urceolus lower extreme is connected fixedly through shear pin and bottom connection, the slips of slips mechanism is held in the palm and the center tube locking is fixed to soluble locking piece.

2. The drillable and recyclable suspension packer as claimed in claim 1, wherein the slip mechanism comprises a cone, slips and a slip holder, the cone is fixedly connected with the central pipe through an upper shear pin, the slips are located below the cone, the slips and the cone are respectively provided with a matched conical surface, the upper end of the slip holder supports the lower end of the slips, the slip holder is provided with a radially through locking block hole, the outer wall of the central pipe is provided with a locking block groove, the soluble locking block is installed in the locking block hole and the locking block groove, namely, the outer end of the soluble locking block extends into the locking block hole, and the inner end of the soluble locking block extends into the locking block groove and simultaneously locks the slip holder and the center.

3. A drillable and retrievable suspension packer as claimed in claim 2, wherein the slip bowl inner wall and the centre tube outer wall have at least a gap extending axially therethrough from the lock block groove to the slip bowl upper port.

4. The drillable and recyclable suspension packer as claimed in claim 2 or 3, wherein the outer wall of the central tube is provided with an axial limiting outer clamping table, the inner wall of the cone is provided with a clamping and unsetting axial stroke groove, and the axial limiting outer clamping table and the clamping and unsetting axial stroke groove are mutually axially limited; the upper end surface of the lower connector axially limits the lower end surface of the slip support, and the axial distance from the upper end surface of the lower connector to the lower end surface of the slip support is consistent with the axial length of the axial stroke groove for deblocking.

5. The drillable and recyclable hanging packer as claimed in claim 1, 2 or 3, wherein the central tube is further sleeved with a push ring, a push cylinder and a lock ring, the lower end of the push cylinder is against the upper end of the rubber cylinder, the upper end of the push cylinder is against the lower end of the push ring, the upper end of the push ring is against the lower end surface of the upper joint, the lock ring is installed inside the push ring, an inner dog buckle is arranged on the inner wall of the lock ring, an outer dog buckle is arranged on the outer wall of the central tube, and the inner dog buckle of the lock ring is connected to the outer dog buckle of the central tube.

6. A drillable and retrievable suspension packer as claimed in claim 1, 2 or 3, wherein the number of the packing elements is at least 2, and spacer rings are installed between every two packing elements.

7. The drillable and recyclable hanging packer as claimed in claim 2 or 3, wherein the upper end of the slip holder is provided with an outer convex edge, the outer cylinder is sleeved on the lower half section of the slip holder, the upper end surface of the outer cylinder is supported against the lower end surface of the outer convex edge, the lock block hole is formed in the lower half section of the slip holder, and the inner wall of the outer cylinder radially limits the soluble lock block.

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