Logging FITS lower hanging and halter fishing cap releasable fisher

Abstract

The utility model discloses a well logging FITS lower hanging and halter fishing cap releasable fisher which comprises an upper connector, a fishing sleeve and a main body, the fishing sleeve is arranged at the bottom of the upper connector in a vertically movable mode, a bearing ring for supporting the fishing sleeve is arranged at the bottom of the upper connector, the main body is arranged on the upper connector in a vertically movable and sleeved mode, and the fishing sleeve is arranged at the bottom of the main body. The upper joint is provided with a limiting piece for limiting the separation of the main body and the upper joint, a shearing pin is arranged between the main body and the upper joint, the bottom of the fishing sleeve is provided with a plurality of fishing grabs, and the bottom of the main body is provided with an inner conical surface matched with the fishing grabs. The shear pin is arranged between the upper connector and the main body, the main body is limited to be separated from the upper connector through the limiting piece, the main body is prevented from falling into a well after being released, and difficulty is prevented from being increased for follow-up treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling tools, in particular to a well logging FITS lower hanging and a Malborough fishing cap releasable fishing device. Background Art

[0002] During the drilling, workover, and logging of oil and gas wells, logging instruments and other tubular objects often fall into the well due to various reasons. To ensure the completion of subsequent operations, it is necessary to lower appropriate salvage tools to salvage the objects out of the well. In addition, during the salvage process, if the salvage tool grabs the instrument, sometimes the instrument becomes stuck and the instrument cannot be pulled out even if the tool is pulled up with more than a certain force. In order to ensure the safety of the operation and prevent secondary accidents, it is usually necessary to stop the salvage, release the fish, remove the salvage string, and formulate a separate treatment method. Existing salvage tools mainly include retractable three-ball salvage devices and slip salvage devices. Both of them grasp the fish by biting into the fish body under the action of the conical surface with a toothed slip. This causes certain damage to the tool body, especially to precision instruments. In addition, they are salvage tools for single cylindrical objects and are not suitable for salvaging operations with a stepped shaft salvage head on the top of the logging instrument. Existing Maltello overshot tubes are non-releasable and require additional weak point fishing tools to be installed in the tubing string during use. This not only increases the complexity of the tubing string, but also requires the tool string below the weak point to be left in the well once it is released, increasing the difficulty of subsequent processing. Utility Model Content

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a well logging FITS lower hanging and Malborough fishing cap that can release the fishing device, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the well logging FITS lower hanging and Malborough salvage cap can release the salvage device, including an upper joint, a salvage sleeve and a main body, the salvage sleeve is movably arranged at the bottom of the upper joint, the bottom of the upper joint is provided with a supporting ring for supporting the salvage sleeve, the main body is movably sleeved on the upper joint, the upper joint is provided with a limiter for limiting the separation of the main body from the upper joint, a shear pin is provided between the main body and the upper joint, the bottom of the salvage sleeve is provided with a plurality of salvage grabs, and the bottom of the main body is provided with an inner conical surface to cooperate with the salvage grabs.

[0005] Furthermore, the supporting ring is screwed to the bottom of the upper joint, and the salvage sleeve is provided with a clamping edge with a diameter larger than the inner diameter of the supporting ring.

[0006] Furthermore, a first elastic member is provided on the upper side of the salvage sleeve in the upper joint.

[0007] Furthermore, a second elastic member is provided on the upper side of the main body of the upper joint.

[0008] Furthermore, the limiting member is a limiting external thread arranged at the bottom of the upper joint, and a limiting internal thread is arranged on the inner side of the upper part of the main body.

[0009] Furthermore, an outer tapered hole is provided at the bottom of the main body.

[0010] The above technical solution of the present invention has the following beneficial effects: the present invention sets a shear pin between the upper joint and the main body, and limits the separation of the main body from the upper joint through a limit piece, thereby preventing the main body from falling into the well after release, and avoiding adding difficulties to subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0012] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0013] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] like Figure 1As shown, the logging FITS lower hanging and Malborough salvage cap described in this embodiment can release the salvage device, including an upper joint 1, a salvage sleeve 2 and a main body 3. The salvage sleeve 2 is movably arranged at the bottom of the upper joint 1, and a supporting ring 4 for holding the salvage sleeve 2 is provided at the bottom of the upper joint 1. The main body 3 is movably sleeved on the upper joint 1, and a limiter is provided on the upper joint 1 to limit the separation of the main body 3 from the upper joint 1. A shear pin 5 is provided between the main body 3 and the upper joint 1. A plurality of salvage grips 6 are provided at the bottom of the salvage sleeve 2, and an inner conical surface 7 is provided at the bottom of the main body 3 to cooperate with the salvage grips 6; the upper end of the upper joint 1 is connected to the drill pipe on the upper side, and the salvage device is lowered and lifted by the drill pipe; preferably, the lower end of the salvage grip 6 can be provided with an outer conical surface to cooperate with the inner conical surface 7 at the bottom of the main body 3;

[0015] When the tool is in use, the tool is lowered, the tool head enters the lower end of the main body 3, and the tool head is pushed up by the claw 6 to move the claw sleeve 2 upward and open the claw 6, so that the tool head enters the claw 6, and then the tool is lifted up, the claw 6 is driven by the tool head to move downward, so that the lower end of the claw 6 is engaged with the conical surface 7 in the main body 3, driving the claw 6 to contract and grab the tool head, and continue to lift, so that the tool can be released.

[0016] Preferably, the support ring 4 is screwed to the bottom of the upper joint 1, and the fishing sleeve 2 is provided with a clamping edge 8 with a diameter larger than the inner diameter of the support ring 4; when the fishing sleeve 2 moves downward with the downhole logging instrument, it can be supported by the clamping edge 8 to ensure that the lower end of the fishing catch 6 is separated from the inner conical surface 7 of the main body 3 by a certain distance;

[0017] Preferably, a first elastic member 9 is provided on the upper side of the salvage sleeve 2 in the upper joint 1. The first elastic member 9 is a spring. When the salvage device is lifted, the first elastic member 9 drives the salvage sleeve 2 to move downward relative to the upper joint 1, so that the salvage grip 6 approaches the inner conical surface 7 of the main body 3.

[0018] Preferably, a second elastic member 10 is provided on the upper side of the main body 3 on the upper joint 1. The second elastic member 10 is a spring. The second elastic member 10 is sleeved on the upper joint 1. After the shear pin 5 is disconnected, the main body 3 is subjected to gravity and the elastic force of the second elastic member 10, so that the main body 3 moves downward relative to the upper joint 1, so that the lower end of the catch 6 is disengaged from the inner conical surface 7 of the main body 3 by a certain distance. The claw sleeve is always in an openable state, and the well instrument can be released;

[0019] Preferably, the limiting member is a limiting external thread 11 provided at the bottom of the upper joint 1, and a limiting internal thread 12 is provided on the inner side of the upper portion of the main body 3; the main body 3 is first screwed into the upper joint 1, and then continued to be screwed to disengage the limiting internal thread 12 from the limiting external thread 11, and then the main body 3 is continued to be moved upward, and then the shear pin 5 is installed;

[0020] Preferably, an outer tapered hole 13 is provided at the bottom of the main body 3 to facilitate the upper end of the downhole logging instrument to enter the main body.

[0021] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. The logging FITS is suspended and the Malborough fishing cap can release the fishing device, which is characterized by: The utility model comprises an upper joint, a salvage sleeve and a main body. The salvage sleeve is movably arranged at the bottom of the upper joint. A supporting ring for holding the salvage sleeve is provided at the bottom of the upper joint. The main body is movably sleeved on the upper joint. A limiter for limiting the separation of the main body from the upper joint is provided on the upper joint. A shear pin is provided between the main body and the upper joint. A plurality of salvage claws are provided at the bottom of the salvage sleeve. The bottom of the main body is provided with an inner conical surface to cooperate with the salvage claws.

2. The well logging FITS lower hanging and Malborough fishing cap releasable fishing device according to claim 1 is characterized by: The supporting ring is screwed to the bottom of the upper joint, and the salvage sleeve is provided with a clamping edge with a diameter larger than the inner diameter of the supporting ring.

3. The well logging FITS lower hanging and Malborough fishing cap releasable fishing device according to claim 1 is characterized by: A first elastic member is provided on the upper side of the salvage sleeve in the upper joint.

4. The well logging FITS lower hanging and Malborough fishing cap releasable fishing device according to claim 1 is characterized by: A second elastic member is provided on the upper side of the main body of the upper joint.

5. The well logging FITS lower hanging and Malborough fishing cap releasable fishing device according to claim 1 is characterized by: The limiting member is a limiting external thread arranged at the bottom of the upper joint, and a limiting internal thread is arranged on the inner side of the upper part of the main body.

6. The well logging FITS lower hanging and Malborough fishing cap releasable fishing device according to claim 1 is characterized by: The bottom of the main body is provided with an outer tapered hole.

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