CN212130468U - Support anchor recovery unit - Google Patents

Abstract

The utility model discloses a supporting anchor recovery device, which is used for recovering an anchoring suspension device, wherein the anchoring suspension device is provided with a catching groove, and the catching groove is provided with a connecting point, a lifting inflection point and a releasing inflection point; it is characterized by comprising: a fishing key (8); the catching key (8) is used for abutting against the connecting point, moving from the connecting point to the upward-lifting inflection point under the driving of upward lifting force and moving from the upward-lifting inflection point to the hands-off inflection point under the driving of downward releasing force; the catching key (8) is connected with the upward inflection point and used for lifting and recovering the anchoring suspension device; the catching key (8) is positioned at the releasing inflection point and used for enabling the catching key (8) to leave the catching groove; the problem of original recovery unit and current anchoring linkage structure mismatch, lead to effectively retrieving it is solved.

Description

Support anchor recovery unit

Technical Field

The utility model relates to an oil, gas well put in formula high energy gas fracturing technical field.

Background

The tool string structure of the throwing type high-energy gas fracturing process sequentially comprises a cable, a quick connector, a support anchor feeding device, an anchor suspension device, a long-delay detonator and a fracturing explosive column from top to bottom. The specific process flow is as follows: firstly, conveying a construction tool string to a target layer in a cable conveying mode; then, anchoring the anchoring suspension device on the wall of the casing by adopting a lifting and lowering mode; then, the upper ends of the supporting anchor delivery device and the anchoring suspension device are separated from each other under the control of a ground instrument of the supporting anchor delivery device, and the cable and the supporting anchor delivery device are pulled out; simultaneously opening a liquid inlet hole at the upper part of the anchoring suspension device, enabling liquid in the sleeve to flow to the upper end face of a piston of the long-delay detonator through an internal channel of the anchoring suspension device, pushing the piston to move downwards by hydrostatic column pressure in the well to shear a shearing pin, triggering a delay cable, triggering the detonator to ignite after delaying for 25 minutes, igniting a fracturing explosive column, and fracturing and unblocking a target layer by high pressure generated by combustion of gunpowder; after construction, the supporting anchor recovery device is put in through the cable, and the tools in the well are recovered. The process can achieve the purpose that no cable is arranged in the well when the fracturing explosive column is ignited, and can prevent the cable from being ablated by high temperature generated by the combustion of gunpowder and the cable from being broken and knotted by the generated high pressure.

Because the anchoring suspension device in the process adopts a novel structure, the original supporting anchor recovery device is not matched with the novel anchoring suspension device structure, and the original supporting anchor recovery device can not effectively recover the anchoring suspension device.

Disclosure of Invention

In view of this, the utility model provides a support anchor recovery unit solves original recovery unit and current anchor linkage structure and does not match, leads to the problem that can't effectively retrieve to it.

In order to achieve the aim, the supporting anchor recovery device is used for recovering an anchoring suspension device, wherein the anchoring suspension device is provided with a catching groove, and the catching groove is provided with a connecting point, a lifting inflection point and a releasing inflection point; it is characterized by comprising:

a fishing key;

the catching key is used for butting the connecting point, moving from the connecting point to the lifting inflection point under the driving of a lifting force and moving from the lifting inflection point to the releasing inflection point under the driving of a lowering force;

the catching key is connected with the lifting inflection point and used for lifting and recovering the anchoring suspension device;

the catching key is positioned at the inflection point of the releasing hand and used for enabling the catching key to leave the catching groove.

Preferably, the catching key is fixed on the lower cylinder.

Preferably, the lower cylinder is provided with an upper joint;

and the upper joint is used for being connected with a depth positioning instrument.

Preferably, a plate spring is connected to the outside of the lower cylinder;

and the plate spring is used for keeping an interference state with the sleeve wall and righting the lower barrel.

Preferably, the lower cylinder body is externally provided with a plate spring groove;

the plate spring is fixed in the plate spring groove.

Preferably, the lower part of the lower cylinder body is provided with a limiting groove;

the limiting groove is communicated with the plate spring groove;

and the limiting groove is used for limiting the lower part of the plate spring.

Preferably, a limit ring is arranged in the limit groove;

the limiting ring is used for limiting the plate spring in the plate spring groove.

Preferably, the upper end of the plate spring is fixed on the upper joint through a screw and a plate spring split ring.

Preferably, the lower cylinder is provided with a circulating hole;

and the circulating hole is used for reducing the downward-placing resistance of the lower barrel.

The utility model discloses following beneficial effect has:

the utility model discloses recovery unit is provided with catches the key, catches the groove cooperation with anchoring linkage through this catches the key, adopts to lift the effective recovery that transfers the mode to realize anchoring linkage to at the recovery in-process, can effectively solve when meeting the card and in time take off the hand with anchoring linkage.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of a support anchor recovery device according to an embodiment of the present invention;

fig. 2 is an expanded schematic view of the structure of the catching groove of the anchoring suspension device of the embodiment of the invention.

In the figure: 1 top connection, 2 leaf spring split rings, 3 leaf spring grooves, 4 lower part barrels, 5 leaf springs, 6 spacing rings, 7 spacing grooves, 8 catching keys, 9 circulation holes and 10 key grooves.

Detailed Description

The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. However, for parts not described in detail, those skilled in the art can fully understand the present invention.

Furthermore, those skilled in the art will appreciate that the drawings are provided for purposes of illustrating the objects, features, and advantages of the invention and are not necessarily drawn to scale.

Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".

Fig. 1 is a schematic structural view of a support anchor recovery device according to an embodiment of the present invention; fig. 2 is an expanded schematic view of the structure of the catching groove of the anchoring suspension device of the embodiment of the invention. As shown in fig. 1 in conjunction with fig. 2: a supporting anchor recovery device is used for recovering an anchoring suspension device, wherein the anchoring suspension device is provided with a catching groove, and the catching groove is provided with a connecting point (namely, a point A in figure 2), a lifting inflection point (namely, a point B in figure 2) and a releasing inflection point (namely, a point C in figure 2); the fishing device specifically comprises a fishing key 8, wherein the fishing key 8 is in butt joint with a connecting point (point A), then the fishing key is driven by an upward force to move from the connecting point (point A) to an upward inflection point (point B), and driven by a downward force to move from the upward inflection point (point B) to a hands-off inflection point (point C); when the fishing key 8 is positioned at the upward lifting inflection point (point B), the fishing key 8 is clamped at the upward lifting inflection point (point B), the upward lifting force acts on the fishing key 8, and the fishing key 8 transmits the upward lifting force to the anchoring suspension device, so that the aim of recovering the anchoring suspension device is fulfilled; when the downward force drives the catching key 8 to be positioned at the inflection point of the release, if the catching key 8 is continuously lifted, the catching key 8 is moved out of the catching groove, and the purpose of releasing the supporting anchor recovery device from the anchoring suspension device is achieved.

In fig. 1, the catching key 8 is fixed on the lower cylinder 4, specifically, a key groove 10 is provided at the lower part of the lower cylinder 4, and the catching key 8 is welded in the key groove 10.

In fig. 1, the lower cylinder 4 has an upper joint 1 thereon; the upper connector 1 and the lower cylinder 4 can be integrally formed or can be assembled and connected into a whole, and are connected with the depth positioning instrument through the upper connector 1.

In fig. 1, a plate spring 5 is connected to the outside of the lower cylinder 4, and the plate spring 5 mainly keeps the interference state of the lower cylinder 4 with the casing wall during the lowering process, so as to achieve the purpose of righting the lower cylinder 4.

In fig. 1, the lower cylinder 4 has a plate spring groove 3 and a stopper groove 7 on the outside, the stopper groove 7 is connected to the plate spring groove 3, and the plate spring 5 is fixed in the plate spring groove 3. The specific fixing mode is that the upper end of the plate spring 5 is fixed on the upper joint 1 through a screw and a plate spring split ring 2, and the lower end of the plate spring 5 is positioned in a limiting groove 7.

In fig. 1, a limiting ring 6 is arranged in a limiting groove 7, the limiting ring 6 is welded on the lower cylinder 4, and the limiting ring 6 is used for positioning the lower end of the plate spring 5 in the limiting groove 7.

In fig. 1, the lower cylinder 4 is provided with a circulation hole 9, and during the lowering of the lower cylinder 4, downhole fluid flows through the circulation hole 9, thereby reducing the lowering resistance of the lower cylinder 4.

Specifically, the working process of the support anchor recovery device of the present invention is briefly described with reference to fig. 1-2:

the device is applied to throwing type high-energy gas fracturing construction. After the gunpowder is ignited, the tools in the well are an anchoring suspension device, a long-delay detonator and a fracturing explosive column core tube.

The depth locator is connected with an upper connector 1 of the support anchor recovery device through threads and is sealed through a sealing ring; then the cable is put into a depth positioning instrument and a support anchor recovery device. After the cable, the depth positioning instrument and the support anchor recovery device reach the upper end of the anchoring suspension device, under the action of the gravity of the tool and the righting effect of the plate spring 5, the fishing key 8 at the lower end of the support anchor recovery device enters the fishing groove of the anchoring suspension device. When the cable is no longer moving downwards, the fishing key 8 is shown reaching the point a of the fishing groove at the upper end of the anchoring suspension device (see fig. 2). And slowly lifting the cable until the cable is stressed to be straight, and at the moment, reaching a point B (shown in figure 2) of a catching groove at the upper end of the anchoring suspension device by the supporting anchor recovery device, wherein the supporting anchor recovery device captures the anchoring suspension device. And continuously lifting the cable, and recovering the related tools in the well.

If the anchoring suspension device is caught in the process of lifting the cable, the cable can be firstly put down, and at the moment, the fishing key 8 of the supporting anchor recovery device is moved downwards from the point B of the fishing groove at the upper end of the anchoring suspension device to the point C (see figure 2). And continuously lifting the cable, and enabling the fishing key 8 of the support anchor recovery device to leave the fishing groove at the upper end of the anchoring suspension device, so that the function of releasing the support anchor recovery device from the anchoring suspension device is completed. And continuously lifting the cable, and taking out the cable, the depth positioning instrument and the support anchor recovery device from the well. Then, other kinds of special fishing tools can be put into the anchoring suspension device through the oil pipe, and subsequent fishing operation is continuously carried out on the anchoring suspension device meeting the clamp.

The above-mentioned embodiments are merely embodiments for expressing the invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, substitutions, modifications, etc. can be made without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A supporting anchor recovery device is used for recovering an anchoring suspension device, wherein a catching groove is formed in the anchoring suspension device, and the catching groove is provided with a connecting point, a lifting inflection point and a releasing inflection point; it is characterized by comprising:

a fishing key (8);

the catching key (8) is used for abutting against the connecting point, moving from the connecting point to the upward-lifting inflection point under the driving of upward lifting force and moving from the upward-lifting inflection point to the hands-off inflection point under the driving of downward releasing force;

the catching key (8) is connected with the upward inflection point and used for lifting and recovering the anchoring suspension device;

the catching key (8) is located at the releasing inflection point and used for enabling the catching key (8) to leave the catching groove.

2. The support anchor retrieval device of claim 1, wherein:

the catching key (8) is fixed on the lower cylinder (4).

3. The support anchor retrieval device of claim 2, wherein:

the lower cylinder (4) is provided with an upper joint (1);

the upper connector (1) is used for being connected with a depth positioning instrument.

4. The support anchor retrieval device of claim 3, wherein:

the outer part of the lower cylinder (4) is connected with a plate spring (5);

and the plate spring (5) is used for keeping an interference state with the sleeve wall and righting the lower cylinder (4).

5. The support anchor retrieval device of claim 4, wherein:

the outer part of the lower cylinder (4) is provided with a plate spring groove (3);

the plate spring (5) is fixed in the plate spring groove (3).

6. The support anchor retrieval device of claim 5, wherein:

the lower part of the lower cylinder (4) is provided with a limiting groove (7);

the limiting groove (7) is communicated with the plate spring groove (3);

and the limiting groove (7) is used for limiting the lower part of the plate spring (5).

7. The support anchor retrieval device of claim 6, wherein:

a limiting ring (6) is arranged in the limiting groove (7);

the limiting ring (6) is used for limiting the plate spring (5) in the plate spring groove (3).

8. A support anchor retrieval apparatus according to any one of claims 4 to 7 wherein:

the upper end of the plate spring (5) is fixed on the upper joint (1) through a screw and a plate spring split ring (2).

9. The support anchor retrieval device of any one of claims 2-7, wherein:

the lower cylinder (4) is provided with a circulating hole (9);

and the circulating hole (9) is used for reducing the downward falling resistance of the lower barrel (4).

10. The support anchor retrieval device of claim 8, wherein:

the lower cylinder (4) is provided with a circulating hole (9);

and the circulating hole (9) is used for reducing the downward falling resistance of the lower barrel (4).

Images