CN212454342U - Jar fisher - Google Patents

Abstract

A jarring fisher is a steel wire operation tool in the production process of a natural gas well, solves the difficulty that a common fisher cannot generate jarring in the underground fishing process, and comprises an outer sleeve, a fishing claw, a spring, a core rod, a cylindrical pin, a positioning sleeve, a disconnecting body, a jarring barrel and a jarring rod, wherein a female buckle at the upper end of the outer sleeve is connected with a male buckle at the lower end of the positioning sleeve; the fishing claw and the spring are sequentially sleeved on the core rod, an inner shoulder at the upper part of the fishing claw is in contact positioning with an outer shoulder at the lower part of the core rod and is arranged in the outer sleeve, and the lower end of the fishing claw is in contact positioning with the inner shoulder at the lower part of the outer sleeve; the male buckle at the upper end of the core rod is connected with the female buckle at the lower part of the disconnecting body; the positioning sleeve is sleeved on the disconnecting body and is fixed by a cylindrical pin; the shock cylinder is sleeved on the shock rod, and the female buckle at the lower part of the shock cylinder is connected with the male buckle at the middle part of the disconnecting body; the shock rod is arranged in the shock cylinder, the lower part of the shock rod is inserted into the upper spring claw of the disconnecting body, and the lower shoulder of the shock rod is in contact positioning with the inner shoulder of the upper spring claw of the disconnecting body.

Description

Jar fisher

Technical Field

The utility model relates to a steel wire operation instrument, especially a jarring fisher in natural gas well production process.

Background

At present, the underground throttling technology is a key technology commonly adopted in the production process of natural gas wells, and the technology can effectively reduce the running pressure of a ground pipe network and reduce the natural gas exploitation cost. In practical application, various structures of underground throttles exist, and some underground throttles have the problem of difficulty in fishing. The conventional fisher of the underground throttleer does not have a jarring function, and a special jar, such as a common chain jar, a common barrel jar and the like, needs to be connected, and generally needs a longer acceleration distance due to the jar principle, so that tools are longer, the connected underground tool string is too long, a longer blowout prevention pipe needs to be matched, and thus, a plurality of troubles are brought to the whole operation, and the production cost is greatly increased.

Disclosure of Invention

The utility model aims at providing a jarring fisher with a jarring function, which solves the difficulty that the common fisher cannot generate jarring in the underground salvage process, and the utility model aims to realize the jar fisher which comprises an outer sleeve, a salvaging claw, a spring, a core bar, a cylindrical pin, a positioning sleeve, a disconnecting body, a jarring cylinder and a jar rod, wherein a female buckle at the upper end of the outer sleeve is connected with a male buckle at the lower end of the positioning sleeve; the fishing claw and the spring are sequentially sleeved on the core rod, an inner shoulder at the upper part of the fishing claw is in contact positioning with an outer shoulder at the lower part of the core rod and is arranged in the outer sleeve, and the lower end of the fishing claw is in contact positioning with the inner shoulder at the lower part of the outer sleeve; the male buckle at the upper end of the core rod is connected with the female buckle at the lower part of the disconnecting body; the positioning sleeve is sleeved on the disconnecting body and is fixed by a cylindrical pin; the shock cylinder is sleeved on the shock rod, and the female buckle at the lower part of the shock cylinder is connected with the male buckle at the middle part of the disconnecting body; the shock rod is arranged in the shock cylinder, the lower part of the shock rod is inserted into the upper spring claw of the disconnecting body, and the lower shoulder of the shock rod is in contact positioning with the inner shoulder of the upper spring claw of the disconnecting body.

The upper part of the fishing claw is provided with an inner shoulder, the lower part of the core rod is provided with an outer shoulder, and the outer shoulder of the core rod is matched with the inner shoulder of the fishing claw in size; the upper end of the core rod is provided with a male buckle, the lower part of the disconnecting body is provided with a female buckle, and the female buckle of the disconnecting body 7 is matched with the male buckle of the core rod; a male buckle is arranged in the middle of the disconnecting body, a female buckle is arranged at the lower part of the jarring barrel, and the female buckle of the jarring barrel is matched with the male buckle of the disconnecting body; the upper part of the disconnecting and connecting body is provided with a spring claw, a shoulder is arranged in the spring claw, the lower part of the shock rod is provided with a shoulder, and the shoulder of the disconnecting and connecting body is matched with the shoulder of the shock rod.

The utility model discloses a positioning sleeve, including overcoat, overcoat upper end, position sleeve, male pin thread and position sleeve male pin thread, the overcoat upper end is provided with the box, the position sleeve lower extreme is provided with the male pin thread to the position sleeve male pin thread suits with the box size of overcoat upper end.

The utility model discloses a use method: connecting a shockable fisher with a downhole tool string, using an instrument vehicle to put the fishing tool string, quickly lowering the tool string when the fishing tool string is close to a fished choke, automatically fishing a fishing head of the choke by a fishing claw of the fisher by means of inertia of the fishing tool string, lifting a logging steel wire, enabling a shock rod to be separated from a spring claw at the upper part of a disconnecting body when the lifting logging steel wire reaches a certain tensile force, enabling the shock rod to be impacted with a shock cylinder by means of inertia, then lowering the fishing tool string, enabling the lower part of the shock rod to be inserted into the spring claw at the upper part of the disconnecting body, lifting the logging steel wire until the shock is generated, repeating the operation in such a way, enabling a choke slip to be loosened and recovered, enabling a sealing part to be recovered to a natural shrinkage state, and continuously lifting the logging steel wire to be taken out; when the throttler cannot be fished out, the logging steel wire is continuously lifted until the cylindrical pin is cut off, the positioning sleeve and the outer sleeve descend, so that the fishing claw loses support and is separated from the fishing head of the throttler, and the hand of the fishing tool string is removed.

The utility model has the following significance: the device has the function of shocking, has short shocking stroke and simple structure, and effectively reduces the comprehensive operation cost.

Drawings

Fig. 1 is a schematic structural diagram of a jarring fisher, which comprises an outer sleeve 1, an outer sleeve 2, a fishing claw 3, a spring 4, a core rod 5, a cylindrical pin 6, a positioning sleeve 7, a disconnecting body 8, a jarring barrel 9 and a jarring rod.

Fig. 2 is a cross-sectional view of a jar overshot at position a-a, fig. 7, a release body 8, a jar 9, and a jar rod.

Detailed Description

Embodiment 1, the utility model discloses an overcoat 1, drag for claw 2, spring 3, core bar 4, cylindric lock 5, position sleeve 6, disjunctor 7, jar 8, jar 9, the box of overcoat 1 upper end is connected with the lower extreme pin thread of position sleeve 6; the fishing claw 2 and the spring 3 are sequentially sleeved on the core rod 4, the inner shoulder at the upper part of the fishing claw 2 is in contact positioning with the outer shoulder at the lower part of the core rod 4 and is arranged in the outer sleeve 1, and the lower end of the fishing claw 2 is in contact positioning with the inner shoulder at the lower part of the outer sleeve 1; the male buckle at the upper end of the core rod 4 is connected with the female buckle at the lower part of the disconnecting body 7; the positioning sleeve 6 is sleeved on the disconnecting body 7 and is fixed by the cylindrical pin 5; the jar 8 is sleeved on the jar rod 9, and the female buckle at the lower part of the jar 8 is connected with the male buckle at the middle part of the disconnecting body 7; the shock rod 9 is arranged in the shock cylinder 8, the lower part of the shock rod is inserted into the upper spring claw of the disconnecting body 7, and the lower shoulder of the shock rod 9 is in contact positioning with the inner shoulder of the upper spring claw of the disconnecting body 7.

In the embodiment 2, the upper part of the fishing claw 2 is provided with an inner shoulder, the lower part of the core rod 4 is provided with an outer shoulder, and the outer shoulder of the core rod 4 is matched with the inner shoulder of the fishing claw 2 in size; a male buckle is arranged at the upper end of the core rod 4, a female buckle is arranged at the lower part of the disconnecting body 7, and the female buckle of the disconnecting body 7 is matched with the male buckle of the core rod 4; a male buckle is arranged in the middle of the disconnecting body 7, a female buckle is arranged at the lower part of the jarring barrel 8, and the female buckle of the jarring barrel 8 is matched with the male buckle of the disconnecting body 7; the upper part of the disconnecting body 7 is provided with a spring claw, a shoulder is arranged in the spring claw, the lower part of the shock rod 9 is provided with a shoulder, and the shoulder of the disconnecting body 7 is matched with the shoulder of the shock rod 9.

Embodiment 3, the upper end of overcoat 1 is provided with the box, 6 lower extremes of position sleeve are provided with the pin thread to 6 pin threads of position sleeve suit with the box size of overcoat 1 upper end.

Claims (3)

1. The utility model provides a jarring fisher, it includes overcoat (1), drags for claw (2), spring (3), core bar (4), cylindric lock (5), position sleeve (6), takes off and connects body (7), jar (8), jar shock rod (9), characterized by: the female buckle at the upper end of the outer sleeve (1) is connected with the male buckle at the lower end of the positioning sleeve (6); the fishing claw (2) and the spring (3) are sequentially sleeved on the core rod (4), the inner shoulder at the upper part of the fishing claw (2) is in contact positioning with the outer shoulder at the lower part of the core rod (4) and is arranged in the outer sleeve (1), and the lower end of the fishing claw (2) is in contact positioning with the inner shoulder at the lower part of the outer sleeve (1); the male buckle at the upper end of the core rod (4) is connected with the female buckle at the lower part of the disconnecting body (7); the positioning sleeve (6) is sleeved on the disconnecting body (7) and is fixed by the cylindrical pin (5); the shock cylinder (8) is sleeved on the shock rod (9), and a female buckle at the lower part of the shock cylinder (8) is connected with a male buckle at the middle part of the disconnecting body (7); the shock rod (9) is arranged in the shock cylinder (8), the lower part of the shock rod is inserted into the upper spring claw of the disconnecting body (7), and the lower shoulder of the shock rod (9) is in contact positioning with the inner shoulder of the upper spring claw of the disconnecting body (7).

2. A jarring overshot as claimed in claim 1 and further comprising: the upper part of the fishing claw (2) is provided with an inner shoulder, the lower part of the core rod (4) is provided with an outer shoulder, and the outer shoulder of the core rod (4) is matched with the inner shoulder of the fishing claw (2) in size; a male buckle is arranged at the upper end of the core rod (4), a female buckle is arranged at the lower part of the disconnecting body (7), and the female buckle of the disconnecting body (7) is matched with the male buckle of the core rod (4); a male buckle is arranged in the middle of the disconnecting body (7), a female buckle is arranged at the lower part of the shock cylinder (8), and the female buckle of the shock cylinder (8) is matched with the male buckle of the disconnecting body (7); the upper part of the disconnecting body (7) is provided with a spring claw, a shoulder is arranged in the spring claw, the lower part of the shock rod (9) is provided with a shoulder, and the shoulder of the disconnecting body (7) is matched with the shoulder of the shock rod (9).

3. A jarring overshot as claimed in claim 1 and further comprising: the utility model discloses a positioning sleeve, including overcoat (1), locating sleeve (6) upper end is provided with the box, locating sleeve (6) lower extreme is provided with the pin thread to the box size of locating sleeve (6) pin thread and overcoat (1) upper end suits.

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