CN216043614U - Limit slide block fishing spear - Google Patents

Abstract

The utility model relates to a limiting slider fishing spear which comprises an upper joint, a fishing spear rod and a limiting ring, wherein the upper joint is in threaded connection with the fishing spear rod, the fishing spear rod is provided with the limiting ring, a dovetail guide rail is arranged on the fishing spear rod, the lower part of the dovetail guide rail is outwards inclined, fishing spears are arranged in the dovetail guide rail and are in sliding fit with a dovetail slide rail, and the limiting ring is positioned at the upper part of the fishing spear teeth. The utility model can better solve the problem of salvaging the central pipe of the packer, and can ensure that the salvaging spear tooth can just catch the upper or lower central pipe of the packer when in use, thereby realizing sectional back-off salvaging; reliable use, high efficiency and low cost.

Description

Limit slide block fishing spear

Technical Field

The utility model relates to a fishing device for overhauling an oil well, in particular to a limiting slide block fishing spear.

Background

At present need salvage the packer often in the conventional overhaul of oil-water well, ordinary slider fishing spear is not spacing, meets the card seriously when the junk, and when fishing spear tooth got into the lower part center tube, it was big to salvage the back-off moment of torsion, and the instrument is fragile, leads to salvaging the failure.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a limiting slider fishing spear which can effectively salvage and back-off an upper central tube and a lower central tube of a packer in a segmented manner when a fish is the packer, so that the fishing of the packer is completed.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a spacing slider drags for lance, includes the top connection, drags for spear and spacing ring, the top connection with drag for spear pole threaded connection, it is equipped with the spacing ring on the spear to drag for, it has the forked tail guide rail to drag for to open on the spear, forked tail guide rail lower part leans out, is equipped with in the forked tail guide rail and drags for the spear tooth, drag for spear tooth and forked tail slide rail sliding fit, the spacing ring is located drags for spear tooth upper portion.

In the above scheme, the end part of the dovetail guide rail is provided with a transverse key groove, and a locking block is arranged in the transverse key groove.

In the above scheme, the locking block is mounted in the transverse key slot through a screw.

In the scheme, the limiting ring is welded on the fishing spear.

In the scheme, the upper joint and the fishing spear rod are made of 35CrMo alloy steel.

In the scheme, the limiting ring, the fishing spear and the locking block are made of 20CrMo alloy steel.

The limiting slide block fishing spear has the following beneficial effects:

1. when the limiting slide block fishing spear is used for fishing construction, a reverse buckling drill rod is generally used, the fishing spear teeth slide downwards by means of dead weight along with the lowering of a pipe column after the spear and the fishing spear teeth enter a fish cavity, the fishing spear teeth and the inclined surface generate relative displacement, the distance between the tooth surfaces of the fishing spear and the central line of the spear is increased, and the fishing size is gradually increased until the tooth surfaces of the fishing spear and the inner wall of the fish cavity are contacted. When the lance is lifted up, the radial component force generated by the upward movement of the inclined surface forces the fishing spear teeth to bite into the inner wall of the falling object to catch the falling object.

2. The fishing reversing device can better solve the problem that the fishing spear rod is damaged and fails due to large torque in the fishing reversing process.

3. The problem that fishing spear teeth enter a fish cavity too deeply to unseal a packer when the Y341 packer is fished can be solved well by the limiting ring.

4. The utility model can better solve the problem of salvaging the Y341 packer central pipe, and can ensure that the salvaging spear tooth can just catch the upper or lower central pipe of the Y341 packer when in use, thereby realizing sectional back-off salvaging; reliable use, high efficiency and low cost.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a limit slider fishing spear of the present invention;

in the figure, 1-joint, 2-spear, 3-limit ring, 4-dovetail guide rail, 5-spear fishing tooth and 6-locking block.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in figure 1, the limiting slide block fishing spear comprises an upper joint 1, a fishing spear rod 2, a limiting ring 3, a dovetail guide rail 4, a fishing spear tooth 5 and a locking block 6.

The internal thread of top connection 1 with drag for 2 threaded connection of lance pole, drag for and be equipped with stop collar 3 on the lance pole 2, drag for and open on lance pole 2 and have forked tail guide rail 4, 4 lower parts of forked tail guide rail lean out, are equipped with in the forked tail guide rail 4 and drag for lance tooth 5, drag for lance tooth 5 and 4 sliding fit of forked tail slide rail. The limiting ring 3 is positioned at the upper part of the spear fishing teeth 5, and the limiting ring 3 can limit the spear fishing teeth 5 and fix the spear fishing teeth 5 at a certain position in the axial direction. The end part of the dovetail guide rail 4 is provided with a transverse key groove, a locking block 6 is arranged in the transverse key groove, and the locking block 6 is used for preventing the fishing spear 5 from freely sliding out.

When salvaging on the spot, can be according to the upper and lower center tube position of packer in the well, weld spacing ring 3 on salvaging the spear, make and drag for spear tooth 5 and just in time block in the center tube part on the packer, can also repeatedly salvage down the center tube after fishing out the center tube to realize packer segmentation deblocking, segmentation purpose of salvaging. The limiting slide block fishing spear is convenient to operate, and the manufacturing and fishing cost is reduced.

Preferably, the locking block 6 is mounted in the transverse keyway by means of a screw.

Preferably, the stop collar 3 is welded to the fishing lance 2.

Preferably, the upper joint 1 and the fishing spear rod 2 are made of 35CrMo alloy steel.

Preferably, the stop collar 3, the spear 5 and the lock block 6 are made of 20CrMo alloy steel.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (5)

1. The limiting sliding block fishing spear is characterized by comprising an upper joint (1), a fishing spear rod (2) and a limiting ring (3), wherein the upper joint (1) is in threaded connection with the fishing spear rod (2), the fishing spear rod (2) is provided with the limiting ring (3), the fishing spear rod (2) is provided with a dovetail guide rail (4), the lower part of the dovetail guide rail (4) inclines outwards, a fishing spear tooth (5) is arranged in the dovetail guide rail (4), the fishing spear tooth (5) is in sliding fit with the dovetail guide rail (4), and the limiting ring (3) is positioned at the upper part of the fishing spear tooth (5); the end part of the dovetail guide rail (4) is provided with a transverse key groove, and a locking block (6) is arranged in the transverse key groove.

2. A limit slider fishing spear according to claim 1, characterized in that the locking piece (6) is mounted in a transverse keyway by means of screws.

3. A stop block spear as claimed in claim 1 wherein the stop collar (3) is welded to the spear (2).

4. The limit slider spear of claim 1 wherein the top sub (1) and spear (2) are made of 35CrMo alloy steel.

5. A stop block spear as claimed in claim 1 wherein the stop collar (3), spear (5) and lock (6) are made of 20CrMo alloy steel.

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