CN209780836U - Packer capable of preventing upward channeling and being deblocked in advance - Google Patents

Abstract

This paper discloses a prevent scurrying packer of deblocking in advance, include the body that is run through by oil pipe, be provided with the anchor assembly who is used for the setting on the body, including preventing the deblocking mechanism, prevent that the deblocking mechanism fixes on the body, prevent that the one end of deblocking mechanism presss from both sides between anchor assembly and the oil pipe for lock anchor assembly before oil pipe lifts to predetermineeing the height, prevent the deblocking mechanism with anchor assembly lock for lock anchor assembly keeps the packer setting. This paper relates to the oil development field, provides a packer of scurring in advance deblocking on preventing, overcomes the problem that downhole pressure leads to the deblocking in advance, adopts to prevent that deblocking mechanism from lifting to predetermineeing highly preceding locking anchor subassembly on oil pipe to the packer of having avoided the too big cause of downhole pressure deblocking in advance.

Description

Packer capable of preventing upward channeling and being deblocked in advance

Technical Field

the utility model relates to an oil development field especially relates to a prevent scurrying packer of deblocking in advance.

Background

The packer is a safety control tool for oil and gas well production, and the unsealing structure is single, and the unsealing can be realized by using a pin or a shearing ring, namely cutting off the pin. And when the pressure in the well is too high,

can lead to packer to scurry on, lift oil pipe, cut off the pin, directly cause the action of deblocking structure to lead to the fact the deblocking, harm production safety.

At present, the packer applied to the sea often meets the failure condition, and the unsealing structure is started by mistake, so that the well control safety is in a problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prevent scurrying packer of deblocking in advance overcomes the problem that downhole pressure leads to the deblocking in advance, adopts and prevents that deblocking mechanism from lifting to predetermineeing before high locking anchoring assembly on oil pipe to the packer of having avoided the too big cause of downhole pressure deblocking in advance.

In order to solve the technical problem, the utility model adopts the following technical scheme:

The utility model provides a prevent scurrying packer of deblocking in advance, includes the body that is run through by oil pipe, be provided with the anchor assembly who is used for the setting on the body, including preventing deblocking mechanism, prevent that deblocking mechanism fixes on the body, prevent that deblocking mechanism's one end presss from both sides between anchor assembly and the oil pipe for lock anchor assembly before oil pipe lifts to predetermineeing the height, prevent deblocking mechanism with anchor assembly lock for lock anchor assembly keeps the packer to set.

One possible design is that the anti-unsealing mechanism comprises a fixed end and a limiting end which are connected, a first plane is arranged on the outer surface of the oil pipe, the fixed end is arranged on the body, the limiting end extends downwards and is clamped between the anchoring component and the first plane, and a limiting groove is arranged on the anchoring component and used for buckling the limiting end to lock the anchoring component; the outer surface of the oil pipe is provided with a release groove, and when the oil pipe is lifted to a preset height, the release groove corresponds to the limiting groove so that the limiting end is separated from the limiting groove to realize deblocking.

In one possible design, the limiting groove is provided with a first inclined surface on the groove wall close to one side of the fixed end, and the limiting end is opposite to the first inclined surface and is provided with a second inclined surface.

a possible design, the surface of body is provided with the mounting groove, the stiff end sets up in the mounting groove.

The utility model provides a possible design, prevent the elastic claw that deblocking mechanism was made for the spring steel, elastic claw length direction both ends constitute respectively stiff end and spacing end.

In one possible design, the outer contour of the limiting end on the side opposite to the anchoring component is matched with the inner surface of the limiting groove.

In one possible embodiment, the release groove is provided with a third inclined surface on a groove wall on a side close to the fixed end.

The oil pipe comprises a plurality of oil pipe short sections and a connector for connecting the adjacent oil pipe short sections, the two ends of the connector are respectively sleeved on the two adjacent oil pipe short sections, and the release groove is formed in the outer surface of the connector.

In one possible design, the circumference of the oil pipe is provided with a plurality of anti-unsealing mechanisms.

in one possible design, the release groove is located at the lower side of the limit groove before the oil pipe is lifted to a preset height.

The utility model has the advantages that:

The utility model discloses a prevent deblocking mechanism and lift to predetermine before high locking anchoring assembly at oil pipe to the packer of having avoided too big leading to the fact of downhole pressure deblocking in advance.

The utility model discloses a prevent deblocking mechanism includes the elastic claw that the spring steel made to and corresponding spacing groove and relief groove, simple structure, simple to operate also does benefit to production.

The utility model discloses a be provided with first inclined plane on the cell wall of spacing groove, and the relative first inclined plane of spacing end is provided with the second inclined plane, and it is smooth-going to the relief groove to be convenient for its extrusion elastic claw buckle.

The utility model discloses a relief groove sets up at the surface of connector, convenient production, effective reduce cost.

The utility model discloses an oil pipe periphery is provided with a plurality of deblocking mechanisms of preventing, and a plurality of deblocking mechanism combined action of preventing guarantees that its effect is stable, can not become invalid because of pressure is too big.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of the packer in the set-in condition;

FIG. 2 is a schematic view of a setting state of a packer;

FIG. 3 is a schematic view of the unset state of the packer;

FIG. 4 is a schematic view of the resilient fingers;

FIG. 5 is a schematic view of a linker;

FIG. 6 is a schematic cross-sectional view of the lower cone;

Fig. 7 is a schematic main body view.

reference numerals: 100-oil pipe, 101-oil pipe short section, 102-connecting body, 103-releasing slot, 104-third inclined plane, 105-first plane, 200-main body, 201-center hole, 202-mounting slot, 203-screw hole, 300-anchoring component, 301-lower taper sleeve, 302-outer slip, 303-slip frame, 304-upper taper sleeve and 305-rubber sleeve mechanism, 306-a first inclined plane, 307-a second plane, 308-a fourth inclined plane, 309-a limiting groove, 400-an anti-unsealing mechanism, 401-an elastic claw, 402-a screw, 403-a fixed end, 404-a limiting end, 405-a fixed hole, 406-a connecting part, 407-a second inclined plane, 408-a third plane, 409-a fifth inclined plane and 500-an assembly gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description of the embodiments of the present invention is provided with reference to the accompanying drawings, and it should be noted that, in the case of conflict, the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other.

Aiming at the defects of related packers, the embodiment of the disclosure provides the packer capable of preventing upward channeling and being unset in advance, and the packer can lock an anchoring assembly before lifting to a preset height on an oil pipe, so that the condition that the packer is unset in advance due to overlarge downhole pressure is avoided.

The packer of the present disclosure is described below in conjunction with an embodiment.

Referring to fig. 1 to 7, the packer of the present embodiment, as shown in fig. 1 to 7, includes a body 200 penetrated by a tubing 100, and an anchor assembly 300 for setting is disposed on the body 200, and particularly, a release-preventing mechanism 400 is disposed between the anchor assembly 300 and the tubing 100, wherein the release-preventing mechanism 400 can lock the anchor assembly 300 to keep the packer in a set state before the tubing 100 is lifted to a predetermined height, so as to prevent the packer from being blown up by downhole pressure and being released in advance.

Specifically, as shown in fig. 7, the main body 200 is barrel-shaped and has a through center hole 201 for the oil pipe 100 to pass through, so that the main body can be sleeved on the oil pipe 100. As shown in fig. 1 to 3, the anchoring assembly 300 sleeved on the main body 200 includes a rubber cylinder mechanism 305, an upper taper sleeve 304, a slip frame 303, an outer slip 302 and a lower taper sleeve 301, which are arranged from top to bottom, wherein the rubber cylinder mechanism 305, the upper taper sleeve 304 and the lower taper sleeve 301 are sleeved on the main body 200 and can slide along the length direction of the main body 200; the outer slip 302 is arranged between the upper taper sleeve 304 and the lower taper sleeve 301, and the slip frame 303 is arranged outside the outer slip 302 to limit the outward stroke of the outer slip 302. In addition, the upper cone sleeve 304 and the lower cone sleeve 301 are fixed to the oil pipe 100 by shear pins, respectively. Therefore, the oil pipe 100 shown in fig. 1 is assembled with a packer and then is put in, when setting is needed, the oil pipe 100 is internally pressed to push the piston on the upper side of the rubber sleeve mechanism 305 to move downwards, and push and compress the rubber sleeve mechanism 305 downwards, and the upper side of the rubber sleeve mechanism 305 is also provided with an internal slip to limit the piston to return upwards; the rubber cylinder mechanism 305 transmits a downward force to the upper taper sleeve 304, so that the shearing pin of the upper taper sleeve 304 is cut off, and the upper taper sleeve 304 continues to move downwards; meanwhile, the shear pins on the lower taper sleeve 301 are fastened, so that the lower taper sleeve 301 props against the outer slip 302 to move downwards, and the outer slip 302 moves outwards to be clamped on the wall of the casing; in addition, the packing element mechanism 305 continues to expand to seal the upper and lower annular spaces of the packer, thereby completing setting.

As shown in fig. 1 to fig. 3, the oil pipe 100 further includes a plurality of oil pipe nipples 101 connected end to end, and a connecting body 102 for connecting adjacent oil pipe nipples 101, wherein two ends of the barrel-shaped connecting body 102 are respectively sleeved on two adjacent oil pipe nipples 101, and the connecting body 102 is disposed at the lower end of the main body 200.

As for the anti-unsealing mechanism 400, as shown in fig. 1 to 3, two anti-unsealing mechanisms 400 are disposed on the outer periphery of the oil pipe 100 and are separated by the oil pipe 100, and a plurality of anti-unsealing mechanisms 400 can work together to ensure stable action and will not fail due to excessive pressure. As shown in fig. 4 to 6, the anti-unsealing mechanism 400 includes an elastic claw 401 made of spring steel Inconel X-750, a limiting groove 309 and a releasing groove 103, where the elastic claw 401 is long, and includes a fixed end 403, a connecting portion 406 and a limiting end 404, which are sequentially arranged, and the connecting portion 406 connects the fixed end 403 and the limiting end 404. Specifically, the fixing end 403 is provided with a fixing hole 405 for fixing with the main body 200, and correspondingly, as shown in fig. 7, one end of the main body 200 is provided with a mounting groove 202 for mounting the fixing end 403, and the bottom of the mounting groove 202 is provided with a screw hole 203 corresponding to the fixing hole 405; the thickness of the connecting part 406 is smaller than that of the fixed end 403 and the limiting end 404, so that the elasticity of the elastic claw 401 is improved, and the elastic claw 401 is conveniently stressed to bend; as shown in fig. 4 and 6, a second inclined plane 407, a third plane 408 and a fifth inclined plane 409 are connected to one side of the limiting end 404 facing the lower taper sleeve 301, and correspondingly, the inner side of the lower taper sleeve 301 is provided with the limiting groove 309, and the groove is sequentially provided with the first inclined plane 306, the second plane 307 and the fourth inclined plane 308, so that the end surface of the limiting end 404 facing one side of the lower taper sleeve 301 is matched with the limiting groove 309, that is, when the limiting end 404 is located in the limiting groove 309, the end surface is attached to the limiting groove 309. In addition, the release groove 103 is formed on the outer surface of the connection body 102, wherein the release groove 103 is provided with a third inclined surface 104 on one groove wall, and the connection body 102 is provided with a first plane 105 connected to the third inclined surface 104.

Thus, as shown in fig. 1, after the packer is assembled, the fixed end 403 of the elastic claw 401 is clamped between the body 200 and the lower cone sleeve 301, the limiting end 404 of the elastic claw 401 extends downwards to a position between the connecting body 102 and the lower cone sleeve 301, one side of the limiting end 404 is arranged in the limiting groove 309, and the other side of the limiting end protrudes out of the limiting groove 309 and is attached to the first plane 105, so that the lower cone sleeve 301 can be limited in the vertical direction. In addition, an assembly gap 500 is provided between the body 200 and the connecting body 102, so as to provide a space for lifting the oil pipe 100. As shown in fig. 2, when the packer is set, the limit end 404 is still disposed in the limit groove 309, the limit groove 309 is fastened, the position of the lower taper sleeve 301 is locked, and setting is ensured, and meanwhile, the downhole pressure may cause the oil pipe 100 to cut off the pin and leap upward, but the pressure is not enough to leap upward to a preset height, that is, not enough to cause the third inclined surface 104 of the release groove 103 to move upward to the limit end 404, so as to ensure setting, and prevent the downhole pressure from causing ahead deblocking. When the unsealing is needed, as shown in fig. 3, the oil pipe 100 needs to be lifted to a preset height, the body 200 is abutted against the connecting body 103, and in the process, the release groove 103 moves upwards, so that the limiting end 404 is positioned at the notch of the release groove 103, and as the lower taper sleeve 301 is subjected to a downward force, the first inclined surface 306 of the lower taper sleeve 301 extrudes the second inclined surface 407 of the limiting end 404, so that the elastic claw 401 bends, the limiting end 404 extends into the release groove 103, and is separated from the limiting groove 309, and the lower taper sleeve 301 is not limited, so that the lower taper sleeve 301 moves downwards, the outer slip 302 is driven to contract inwards, the rubber cylinder mechanism 305 expands and moves downwards, and the unsealing is completed. In addition, the third inclined surface 104 can also facilitate the recovery and the re-installation of the equipment.

in an embodiment, the fixing end 403 can be inserted into the body 200 and fixed by screws, so as to facilitate assembly.

In another embodiment, the relief groove 103 may be disposed on the outer surface of the tubing sub 101 instead of on the connection body, but it is necessary that the tubing sub 101 is provided with a protrusion protruding from the outer surface thereof, and the protrusion can cooperate with the lower taper sleeve 301 to clamp the limit end 404 of the elastic claw 401.

Combine above-mentioned embodiment, the utility model discloses a prevent deblocking mechanism lifts to predetermineeing before the height locking anchoring assembly at oil pipe to the packer that the too big cause of pressure in the pit has been avoided and the deblocking in advance. The utility model discloses a prevent deblocking mechanism includes the elastic claw that the spring steel made to and corresponding spacing groove and relief groove, simple structure, simple to operate also does benefit to production. The utility model discloses a be provided with first inclined plane on the cell wall of spacing groove, and the relative first inclined plane of spacing end is provided with the second inclined plane, and it is smooth-going to the relief groove to be convenient for its extrusion elastic claw buckle. The utility model discloses a relief groove sets up at the surface of connector, convenient production, effective reduce cost. The utility model discloses a be provided with a plurality of deblocking mechanisms of preventing between body and the oil pipe, a plurality of deblocking mechanism combined action of preventing guarantees that its effect is stable, can not become invalid because of pressure is too big.

in the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It should be understood by those skilled in the art that, although the embodiments of the present invention have been described above, the embodiments are only used for understanding the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. It will be apparent to persons skilled in the relevant art that various changes in form and details can be made therein without departing from the spirit and scope of the embodiments of the invention as disclosed in the appended claims.

Claims (10)

1. The utility model provides a prevent scurrying packer of deblocking in advance, includes the body that is run through by oil pipe, be provided with the anchor assembly that is used for the setting on the body, its characterized in that, including preventing the deblocking mechanism, prevent that the deblocking mechanism is fixed on the body, prevent that the one end of deblocking mechanism presss from both sides between anchor assembly and the oil pipe for lock anchor assembly before oil pipe lifts to predetermineeing the height, prevent the deblocking mechanism with anchor assembly lock for lock anchor assembly keeps the packer setting.

2. The anti-channeling advance unset packer of claim 1, wherein the anti-unset mechanism comprises a fixed end and a limiting end connected, the outer surface of the tubing having a first plane, the fixed end being disposed on the body, the limiting end extending downward and being sandwiched between the anchor assembly and the first plane, the anchor assembly having a limiting groove for engaging the limiting end to lock the anchor assembly; the outer surface of the oil pipe is provided with a release groove, and when the oil pipe is lifted to a preset height, the release groove corresponds to the limiting groove so that the limiting end is separated from the limiting groove to realize deblocking.

3. The packer of claim 2, wherein the retainer groove has a first inclined surface on a wall of the groove on a side adjacent to the fixed end, and the retainer end has a second inclined surface opposite to the first inclined surface.

4. The packer of claim 2, wherein the outer surface of the body is provided with a mounting groove, and the fixed end is disposed in the mounting groove.

5. the packer capable of preventing upward movement and achieving early unsetting as claimed in claim 2, wherein the unsetting-prevention mechanism is an elastic claw made of spring steel, and the two ends in the length direction of the elastic claw respectively form the fixed end and the limiting end.

6. The anti-uphole advance unset packer of claim 3, wherein an outer profile of said set end on a side opposite said anchor assembly matches an inner surface of said set groove.

7. The anti-tampering advance release packer of claim 2, wherein the relief groove is provided with a third chamfer on a wall of the groove on a side adjacent the fixed end.

8. the packer of any one of claims 2-7, wherein the tubing comprises a plurality of tubing subs and a connector connecting adjacent tubing subs, two ends of the connector are respectively sleeved on two adjacent tubing subs, and the release groove is arranged on the outer surface of the connector.

9. The anti-run-up advance unset packer of any of claims 1-7, wherein a plurality of the anti-run-out mechanisms are disposed circumferentially of the tubing.

10. The anti-tampering advance release packer of claim 2, wherein the relief groove is located on the underside of the retention groove before the tubing is lifted to a predetermined height.