CN219795202U - Combined fishing spear - Google Patents

Abstract

The utility model provides a combined fishing spear, and relates to the technical field of oilfield workover tools. Comprising the following steps: the inner wall of the barrel is provided with internal threads, the joint and the overshot guide shoe are connected with the barrel through threads, and the overshot guide shoe is provided with a control ring; the inner part of the barrel body is provided with a mandrel and a fishing spear guide cone which are connected with each other, the mandrel is connected with the joint, the side wall of the fishing spear guide cone is provided with a fishing spear slip, the mandrel is provided with a fishing barrel slip which is clamped with the control ring, the fishing barrel slip is provided with external threads, and the fishing barrel slip, the control ring and the fishing barrel guide shoe are hollow structures and are communicated with each other; the problem of corrosion oil pipe extremely easily rises and split and lead to salvage failure is solved, tubular column salvage success rate has been improved.

Description

Combined fishing spear

Technical Field

The utility model relates to the technical field of oilfield workover tools, in particular to a combined fishing spear.

Background

In the well repair construction process, aiming at the underground corrosion oil pipe salvaging operation, in the prior art, a single salvaging barrel or a salvaging spear is usually used, when the salvaging operation is pressurized, the salvaging operation is performed under the action of gravity, the oil pipe is extremely easy to expand and split, and the salvaging failure probability is high.

Disclosure of Invention

Aiming at the defects in the background technology, the utility model provides a combined fishing spear, which solves the problem that the fishing failure is caused by the extremely easy expansion and splitting of a corroded oil pipe and improves the fishing success rate of a pipe column.

The utility model is realized in the following way:

the utility model provides a combined fishing spear, which comprises a joint, a barrel and a fishing barrel guide shoe, wherein the inner wall of the barrel is provided with internal threads, the joint and the fishing barrel guide shoe are connected with the barrel through threads, and the fishing barrel guide shoe is provided with a control ring;

the inner side of the barrel body is provided with a mandrel and a fishing spear guide cone which are connected with each other, the mandrel is connected with the joint, the side wall of the fishing spear guide cone is provided with a fishing barrel slip which is clamped with the control ring, the fishing barrel slip is provided with external threads, and the fishing barrel slip, the control ring and the fishing barrel guide shoe are of hollow structures and are communicated with each other.

In the utility model, the external thread of the bailing slip and the internal thread of the barrel are left-handed threads, the nominal diameter of the external thread of the bailing slip is smaller than the nominal diameter of the internal thread of the barrel, and the bailing slip comprises a blue slip and a spiral slip.

In the utility model, a first packing is arranged on the inner side of the control ring.

In the utility model, a second packing is arranged at one end of the cylinder body, which is close to the joint.

Compared with the prior art, the utility model has at least the following advantages or beneficial effects:

the combined fishing spear solves the problem that the fishing failure is caused by extremely easy expansion and splitting of the corroded oil pipe: when the oil pipe joint hoop is corroded, a fishing spear is adopted to guide a cone to drag the inside of the pipe column, and the barrel body plays a key role in protecting the oil pipe joint hoop from cracking; when the oil pipe joint hoop is intact, the fishing barrel slips or the fishing spear guiding cone in the barrel are adopted for fishing, and the fishing spear guiding cone part can guide the introduced fish and centralize the pipe column, so that the pipe column fishing success rate can be greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a combined spear according to an embodiment of the present utility model.

Icon: 1-barrel, 2-joint, 3-mandrel, 310-bailing slips, 4-bailing spear guiding cone, 410-bailing spear slips, 5-bailing shoe and 6-control ring.

Detailed Description

Examples

Referring to fig. 1, an embodiment of the present utility model is shown.

The embodiment provides a combined fishing spear, which comprises a joint 2, a barrel 1 and a fishing barrel guide shoe 5, wherein the inner wall of the barrel 1 is provided with internal threads, the joint 2 and the fishing barrel guide shoe 5 are in threaded connection with the barrel 1, and the fishing barrel guide shoe 5 is provided with a control ring 6;

the barrel 1 is internally provided with a mandrel 3 and a fishing spear guide cone 4 which are connected with each other, the mandrel 3 is connected with the joint 2, the side wall of the fishing spear guide cone 4 is provided with a fishing spear slip 410, the mandrel 3 is provided with a fishing barrel slip 310 which is clamped with the control ring 6, the fishing barrel slip 310 is provided with external threads, and the fishing barrel slip 310, the control ring 6 and the fishing barrel guide shoe 5 are of hollow structures and are communicated with each other.

In this embodiment:

the bailing slips 310 include a blue slip and a helical slip, which are selected according to the fishing conditions in the field. The external thread of the bailing slip 310 and the internal thread of the barrel 1 are left-handed threads, and the nominal diameter of the external thread of the bailing slip 310 is smaller than the nominal diameter of the internal thread of the barrel 1, thereby creating conditions for the up-and-down movement (grabbing teeth) and expansion and contraction of the bailing slip 310 in the barrel 1.

Spiral slips: the spiral slips are like springs, the outside is provided with wide-sawtooth left-handed threads, the pitch is the same as that of the internal threads of the cylinder body 1, and the spiral slips are matched with the internal threads of the cylinder body 1, but the thread surfaces are narrower; the interior is a grabbing tooth which is a multi-head left-handed zigzag screw tooth, and the screw tooth is sharp and hard; the engagement of the screw slips with the control ring 6 restricts the rotation of the screw slips within the bowl 1.

Basket-shaped slips: the basket-shaped slips are cylindrical and are similar to flower baskets; the outside is the same as the spiral slip, but is complete wide sawtooth left-handed screw, and the inside grabs and drags the tooth and is the same as bull left-handed zigzag screw, and the lower extreme has the keyway, and it has the equal expansion groove to open vertically, like the spring chuck very much. The engagement of the basket slips with the control ring 6 limits the rotation of the basket slips within the bowl 1.

It should be noted that, the spiral slips and the basket slips are mature products in the market, no matter the spiral slips or the basket slips are assembled in the barrel 1, the operations of fishing the fish and releasing the fish to exit the barrel 1 in the fishing process are the same.

The inner side of the control ring 6 is provided with a first packing which is matched with the basket-shaped slips for use, so that the tightness between the fish and the device is improved. The second packing is arranged at one end, close to the joint 2, in the barrel body 1, and after falling into the barrel body 1, the tightness between the outer wall of the fish and the inner wall of the barrel body 1 is improved.

Working principle:

the fishing component of the fishing spear guide cone 4 is a fishing spear slip 410; the fishing component of the barrel 1 is a fishing barrel slip 310 (a spiral slip and a basket slip), the outside wide sawtooth thread and the inside fishing tooth of the two fishing barrel slips 310 are left-handed threads, and the clearance matched with the inner wall of the barrel 1 is large, so that the fishing barrel slip 310 can expand and contract with a certain stroke in the barrel 1.

Axial pressure is applied to introduce the fish into the socket slip 310 in the barrel 1, at the moment, the socket slip 310 ascends and swells, and the fish is snapped and clamped by the action of elastic force on the hard sharp clamping teeth. When the integral device is lifted up, the slips relatively move downwards in the barrel 1 under the action of the gravity of the fish; because the longitudinal section of the wide sawtooth thread is a conical inclined plane, the bailing slips 310 inevitably carry heavy fish to move towards the small cone end of the cone, and the larger the weight of the fish is, the tighter the weight of the fish is, and the whole weight of the fish is transmitted to the barrel body 1 by the bailing slips 310.

According to the foregoing, the wide sawtooth thread of the barrel 1 and the internal and external threads of the bailing slips 310 are left-handed threads, and the rotational movement thereof is restrained by the control ring 6, so that when releasing the fish, the mandrel 3 is rotated clockwise by applying a certain pressure, and the fish can be withdrawn from the barrel 1.

In summary, the embodiments of the present utility model have at least the following beneficial effects:

the utility model combines the conventional fishing spear with the fishing barrel, the whole device is applicable to two types of fishing barrel slips 310 on the market, and the combined fishing spear solves the problem that the fishing failure is caused by the extremely easy expansion and splitting of the corroded oil pipe: when the oil pipe joint hoop is corroded, the fishing spear guide cone 4 is adopted for fishing in the pipe column, and the barrel 1 plays a key role in protecting the oil pipe joint hoop from cracking; when the oil pipe joint hoop is intact, the fishing barrel slips 310 or the fishing spear guide cone 4 in the barrel body 1 are adopted for fishing, and the fishing spear guide cone 4 can be used for guiding and guiding fish and righting a pipe column, so that the pipe column fishing success rate can be greatly improved.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (4)

1. The combined fishing spear is characterized by comprising a connector, a barrel and a fishing barrel guide shoe, wherein the inner wall of the barrel is provided with internal threads, the connector and the fishing barrel guide shoe are connected with the barrel through threads, and the fishing barrel guide shoe is provided with a control ring;

the automatic fishing device is characterized in that a mandrel and a fishing spear guide cone which are connected with each other are arranged in the barrel, the mandrel is connected with the connector, a fishing spear slip is arranged on the side wall of the fishing spear guide cone, the mandrel is provided with a fishing barrel slip clamped with the control ring, the fishing barrel slip is provided with external threads, and the fishing barrel slip, the control ring and the fishing barrel guide shoe are of hollow structures and are communicated with each other.

2. The combination fishing spear of claim 1, wherein the external threads of the overshot slips and the internal threads of the barrel are left-hand threads, the nominal diameter of the external threads of the overshot slips is smaller than the nominal diameter of the internal threads of the barrel, and the overshot slips comprise blue slips and helical slips.

3. The combination fishing spear of claim 2 wherein the control ring is provided internally with a first packing.

4. The combination fishing spear of claim 1 wherein a second packing is provided in the barrel at an end adjacent the joint.