CN212479147U

CN212479147U - High-strength lifting and releasing type reversing fishing spear

Info

Publication number: CN212479147U
Application number: CN202021100177.6U
Authority: CN
Inventors: 夏文成
Original assignee: Tonghua Petroleum Tools Co Ltd
Current assignee: Tonghua Petroleum Tools Co Ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-02-05
Anticipated expiration: 2030-06-15

Abstract

The utility model relates to an oil field workover tool field, high strength is carried and is put formula back-off and drag for lance promptly. The upper connector and the lance are integrated into a whole, the upper part is the upper connector, and the lower part is the lance. The part of the spear is sleeved with a sliding sleeve, the sliding sleeve is provided with a reversing pin which is inserted in the radial direction, the surface of the spear above the sliding sleeve is provided with a curved reversing groove for the reversing pin to be introduced, the lower end of the sliding sleeve is hooked with a ring-shaped slip, an inner hole at the lower part of the ring-shaped slip is provided with an inner conical surface, the outer surface of the lower part of the ring-shaped slip is provided with a thread, the lower end of the lower part of the ring-shaped slip is provided with four grooves along the axial direction to form the slip, and the surface of the spear. The upper joint and the lance are directly processed into a whole without threaded connection. The lifting load and the rotating torque are greatly improved, and the use is safe and reliable. The sliding sleeve and the slips are cut into two halves from the middle by linear cutting, so that the installation is convenient and the connection is reliable.

Description

High-strength lifting and releasing type reversing fishing spear

Technical Field

The utility model relates to an oil field workover tool field, high strength is carried and is put formula back-off and drag for lance promptly.

Background

In the prior art, a lifting and releasing type reversing fishing spear is a tool for fishing from an inner hole of a fallen fish. When the fish is stuck and can not be fished out, the fishing spear can withdraw from the fish cavity and is pulled out of the fishing pipe column. The lifting and releasing type reversing fishing spear has the structure as shown in figure 1: the novel sliding sleeve comprises an upper connector 1 and a lance 2 which are connected through threads, a sliding sleeve 3 is sleeved on the lance 2, a reversing pin 4 which is inserted in the radial direction is arranged on the sliding sleeve 3, a curved reversing groove 5 for leading the reversing pin 4 is formed in the surface of the lance above the corresponding sliding sleeve 3, an inner hole at the lower end of the sliding sleeve 3 is provided with an inner conical surface 6, a thread tooth 7 is arranged on the outer surface of the lower end of the sliding sleeve 3, a plurality of grooves 8 are formed in the lower end of the sliding sleeve 3 along the axial direction to form a slip 9, and an outer conical surface 10 which acts on the inner conical surface 6 of. A drill pipe is connected above the upper joint 1, and slips 9 are introduced into the falling object. The drill string is lifted up and the external tapered surface 10 of the lance is locked with the internal tapered surface 6 of the slip so that the sharp thread teeth 7 of the slip 9 tightly engage the falling object. The drill string continues to be lifted or rotated to effect fishing or back-off. The disadvantages are that: because the lifting type reversing fishing spear is special in shape, namely, the two ends are thick, and the middle is thin. The slips 9 must be in the middle, resulting in the weakest part of the product at the threaded connection of the top sub 1 and the lance 2 and being easily damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough and provide the connection reliably, but high strength of safe in utilization is carried and is put formula back-off and drag for the lance.

The technical solution of the utility model is that: the high-strength lifting and releasing type back-off fishing spear comprises an upper connector and a spear, wherein a sliding sleeve is sleeved at the spear, a reversing pin which is inserted in the radial direction is arranged on the sliding sleeve, a curved reversing groove for leading the reversing pin into is formed in the surface of the spear above the sliding sleeve, a ring sleeve-shaped slip is hooked at the lower end of the sliding sleeve, an inner hole at the lower part of the ring sleeve-shaped slip is provided with an inner conical surface, the outer surface at the lower part of the ring sleeve-shaped slip is provided with screw threads, four grooves are formed at the lower end of the lower part of the ring sleeve-shaped slip in the axial direction to form a slip, and an outer conical surface which acts on the inner conical surface of the sliding sleeve slip is arranged on the surface of the spear; cutting the sliding sleeve into two half structures convenient to mount from the middle by adopting linear cutting; and after drilling and tapping are carried out on the upper part of the slip, the slip is sliced into two half structures with dovetail grooves in a butt joint mode from the middle by utilizing linear cutting.

The utility model has the advantages that: 1. the upper joint and the spear are directly processed into a whole without threaded connection, the strength is high, the lifting load and the rotating torque are greatly improved, and the use is safe and reliable. 2. The sliding sleeve is cut in half from the middle by using wire cutting, so that the installation is convenient. 3. The two halves with the dovetail are planed and cut from the middle by utilizing linear cutting after drilling and tapping at the tail part of the slip, so that the slip is convenient to install, reliable in connection and integrated.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of a retractable reversing fishing spear in the prior art.

Fig. 2 is a schematic view of the structure of the present invention.

Fig. 3 is a schematic view of a modified sliding sleeve structure.

Fig. 4 is a schematic left view of fig. 3.

FIG. 5 is a schematic view of an improved slip configuration.

Fig. 6 is a schematic view of the structure of fig. 1 taken along the line a-a.

Detailed Description

Referring to fig. 1-6, the part names are as follows: the device comprises an upper connector 1, a lance 2, a sliding sleeve 3, a reversing pin 4, a reversing groove 5, an inner conical surface 6, a thread tooth 7, an opening groove 8, a slip 9, an outer conical surface 10, a dovetail groove 11, a connecting thread 12, a guide pin 13 and a positioning sleeve 14.

Referring to fig. 2-6, the high-strength lifting and releasing type reversing spear comprises an upper connector 1 and a spear 2, a sliding sleeve 3 is sleeved on the spear 2, a reversing pin 4 which is inserted in the radial direction is arranged on the sliding sleeve 3, a curved reversing groove 5 for leading the reversing pin 4 in is arranged on the spear surface above the corresponding sliding sleeve 3, a sleeve-shaped slip 9 is hooked at the lower end of the sliding sleeve 3, an inner conical surface 6 is arranged in an inner hole at the lower part of the sleeve-shaped slip 9, a thread tooth 7 is arranged on the outer surface at the lower part of the sleeve-shaped slip 9, four grooves 8 are axially arranged at the lower end of the lower part of the sleeve-shaped slip 9 to form a slip 9, and an outer conical surface 10 which acts on the inner conical. The upper connector 1 and the lance 2 are integrated, the upper part is the upper connector, and the lower part is the lance 2; cutting the sliding sleeve 3 into two half structures which are convenient to install from the middle by adopting linear cutting (see figure 4); the upper part of the slip 9 is drilled and tapped, and then is sliced into two butted structures with dovetail grooves 11 from the middle by using wire cutting (see figure 6). After the improvement, the upper joint 1 and the lance 2 are thick at both ends, and the sliding sleeve 3 and the slips 9 need to be installed in two halves. The molybdenum wire cut by the wire is very thin, and the slicing thickness can be ignored. If the outer diameter of the slip 9 is damaged after being cut by the milling machine, it is irreparable if it is otherwise machined. The hardness of the thread teeth 7 of the slip is high and reaches 58-62 HRC. In order to ensure the hardness of the thread teeth 7 of the slip, the hardness of other parts of the slip 9 is high, so that the conventional machining method for dividing the slip 9 into two parts is difficult, and the wire cutting is an ideal choice.

The above description is only exemplary of the present invention, and the various illustrations do not limit the essence of the present invention.

Claims

1. The high-strength lifting and releasing type reversing fishing spear comprises an upper connector (1) and a spear (2), a sliding sleeve (3) is sleeved at the spear (2), a reversing pin (4) which is inserted in the radial direction is arranged on the sliding sleeve (3), a curved reversing groove (5) for leading a reversing pin (4) in is arranged on the surface of a lance above the corresponding sliding sleeve (3), the lower end of the sliding sleeve (3) is hooked with a ring-shaped slip (9), an inner hole at the lower part of the ring-shaped slip (9) is provided with an inner conical surface (6), the outer surface of the lower part of the ring-shaped slip (9) is provided with a thread (7), the lower end of the lower part of the ring-shaped slip (9) is provided with four grooves (8) along the axial direction to form the slip (9), an outer tapered surface (10) which acts on the inner tapered surface (6) corresponding to the surface of the lance, the connector is characterized in that the upper connector (1) and the lance (2) are integrated, the upper part is the upper connector, and the lower part is the lance (2); the sliding sleeve (3) is cut into two half structures convenient to install from the middle by adopting linear cutting; after drilling and tapping are carried out on the upper part of the slip (9), the slip is planed and cut into two half structures with dovetail grooves (11) in the middle in a butt joint mode by utilizing wire cutting.