CN210509097U

CN210509097U - Split type inner hook tooth overshot

Info

Publication number: CN210509097U
Application number: CN201921445857.9U
Authority: CN
Inventors: 谭宗华; 吕正华; 张文哲; 王云山; 李献宾
Original assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-05-12
Anticipated expiration: 2029-09-02

Abstract

The utility model relates to a salvage a technical field, a section of thick bamboo is salvaged to hook tooth in lamella formula, including salvaging barrel and the top connection that can be connected with the weight rod, the top connection bottom is fixed with salvage the barrel top, salvages barrel lateral wall and is provided with a plurality of flutings along the circumference interval, every grooved bottom all extends to salvages the barrel terminal surface down, salvages and is equipped with the interior hook tooth of pliability on the inner wall of barrel lower part, the interior hook tooth bottom of pliability and salvages barrel inner wall fixed connection, the interior hook tooth of pliability is by supreme down to salvaging barrel inboard slope. The utility model has the advantages of reasonable and compact structure, convenient to use, it can realize salvaging the junk in some anomalous unconventional wells through the setting of fluting and pliability internal hook tooth.

Description

Split type inner hook tooth overshot

Technical Field

The utility model relates to a salvage section of thick bamboo technical field is a section of thick bamboo is salvaged to hook tooth in lamella formula.

Background

At present, in the conventional steel wire well testing operation of an oil field, in order to measure formation pressure recovery data after well shut-in, a hanger is firstly connected with a storage type electronic manometer and a counterweight rod, and then the hanger is put in at a fixed point by an electronic trip-card instrument. And after the specified test time is finished, fishing out the pressure gauge by using the steel wire belt fishing instrument for data playback. However, the well entering instrument is eroded by the fluid in the well for a long time or the accident that parts are scattered in the well due to the material of the well entering instrument often happens. The conventional steel wire fishing tool is generally used in a matched manner, for example, the conventional steel wire fishing tool is specially used for fishing an inner hook and an outer hook of a steel wire falling into a well, and is specially used for a hinge fishing barrel of a pressure gauge falling into the well. However, the irregular falling objects in the well can be solved only by making a special fishing tool according to the actual situation in the field and referring to the lead mill printing result. If the condition that the jack catch in the hanger drops on the pressure gauge in the well occurs in the fishing operation of the test well steel wire, the jack catch must be fished out firstly before the fishing cylinder operation of the conventional pressure gauge is used, however, the material of the falling jack catch is stainless steel, the weight is light, the shape is V-shaped, the conventional fishing tool cannot take out the falling jack catch, and therefore the fishing cylinder capable of fishing irregular non-conventional falling objects in the well is urgently needed.

Disclosure of Invention

The utility model provides a section of thick bamboo is salvaged to hook tooth in split type has overcome above-mentioned prior art not enough, and it can effectively solve the problem that the irregular unconventional well junk can't be salvaged to current salvage a existence.

The technical scheme of the utility model is realized through following measure: the utility model provides a section of thick bamboo is salvaged to split type internal hook tooth, includes salvage barrel and the top connection that can be connected with the weight rod, top connection bottom is fixed with salvage barrel top, salvages barrel lateral wall and is provided with a plurality of flutings along the circumference interval, every grooved bottom all extends to and salvages terminal surface under the barrel, salvages and is equipped with the internal hook tooth of pliability on the inner wall of barrel lower part, the internal hook tooth bottom of pliability and salvages barrel inner wall fixed connection, the internal hook tooth of pliability is by supreme inside slope of salvaging the barrel down.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the side wall of the fishing barrel body can be provided with four slots at intervals along the circumferential direction, the sum of the arc lengths of the openings of the outer circumference of the fishing barrel body is one half to two thirds of the circumference of the outer circumference of the fishing barrel body, the four slots divide the side wall of the lower part of the fishing barrel body into four-petal fishing claws, and the bottom ends of the four-petal fishing claws are all arranged at the top ends.

The bottom heights of the four-petal fishing claws can be different.

The top of the upper joint can be provided with a threaded hole which can be in threaded connection with the weighting rod.

The axial direction of the inner wall of the lower part of the salvaging cylinder body can be provided with a plurality of rows of flexible inner hook teeth, and each row of flexible inner hook teeth comprises steel wire inner hook teeth and nickel-copper welding wire inner hook teeth which are alternately distributed along the circumferential direction of the inner wall of the lower part of the salvaging cylinder body.

The inner hook tooth of the steel wire is cylindrical and has a diameter ranging from 2.5mm to 3mm, and the inner hook tooth of the nickel-copper welding wire is cylindrical and has a diameter ranging from 2.4mm to 2.6 mm.

The utility model has the advantages of reasonable and compact structure, convenient to use, it can realize salvaging the junk in some anomalous unconventional wells through the setting of fluting and pliability internal hook tooth.

Drawings

Fig. 1 is a schematic structural view of the preferred embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structure at a to a in fig. 1.

The codes in the figures are respectively: 1 is a salvaging cylinder body, 2 is an upper joint, 3 is a slot, 4 is a salvaging claw, 5 is a steel wire inner hook tooth, and 6 is a nickel-copper welding wire inner hook tooth.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention will be further described with reference to the following examples and drawings:

as shown in attached figures 1 and 2, the split type inner hook tooth fishing barrel comprises a fishing barrel body 1 and an upper joint 2 which can be connected with a weighting rod, the bottom of the upper joint 2 is fixed with the top of the fishing barrel body 1, a plurality of grooves 3 are formed in the side wall of the fishing barrel body 1 along the circumferential interval, the bottom end of each groove 3 extends to the lower end face of the fishing barrel body 1, flexible inner hook teeth are arranged on the inner wall of the lower portion of the fishing barrel body 1, the bottom end of the flexible inner hook teeth is fixedly connected with the inner wall of the fishing barrel body 1, and the flexible inner hook teeth incline towards the inner side of the fishing barrel body 1 from. According to the requirement, the upper joint 2 and the salvaging cylinder body 1 can be arranged integrally, the upper joint 2 comprises a circular table part and a cylindrical part, the salvaging cylinder body 1 is cylindrical, the top end of the circular table part is connected with the cylindrical part, the bottom end of the circular table part is connected with the top end of the salvaging cylinder body 1, the top end of the cylindrical part is connected with a weighting rod, the inner diameter of the salvaging cylinder body 1 can be adjusted according to the size of the falling object, a plurality of flexible inner hook teeth are distributed on the inner wall of the lower part of the salvaging cylinder body 1, the flexible inner hook teeth can be welded on the inner wall of the lower part of the salvaging cylinder body 1 in a welding mode, the flexible inner hook teeth can be made of metal materials with certain flexibility, the flexible inner hook teeth can generate certain bending deformation when being stressed, the flexible inner hook teeth can return to the original shape after the external force disappears, still do benefit to and introduce the jack catch that drops to in salvaging barrel 1, the jack catch that will drop will be followed to salvaging barrel 1 directly to take out through fluting 3 in addition, the taking out of the jack catch that is convenient for drop, when the anomalous unconventional well junk that will salvage the similar hanger jack catch of shape is in, earlier be connected with the top connection 2 and the weight bar, then put into the well with weight bar and steel wire connection again, carry the wire rope from top to bottom, thereby it can take place to warp when receiving the extrusion of junk because the flexible inner hook tooth has certain pliability, and the junk can be introduced in salvaging barrel 1 and can not take place to drop under the extrusion of pliability inner hook tooth, thereby just can salvage the junk outside the well, whole salvaging process is simple, convenient.

The split type inner hook tooth overshot can be further optimized or/and improved according to actual requirements:

as shown in attached figures 1 and 2, four slots 3 are circumferentially arranged on the side wall of the salvaging cylinder body 1 at intervals, the sum of the arc length of the outer circumference opening of the salvaging cylinder body 1 is one half to two thirds of the circumference of the outer circumference of the salvaging cylinder body 1, the four slots 3 divide the side wall of the lower part of the salvaging cylinder body 1 into four-petal salvaging claws 4, and the bottom ends of the four-petal salvaging claws 4 are all arranged at pointed ends. The four pieces of the fishing claws 4 are arranged to be favorable for grasping fallen objects firmly, the opening area of the slot 3 is large, the fallen objects can be conveniently introduced and taken out, the flexible inner hook teeth can be conveniently installed, and the pointed ends of the bottom ends of the fishing claws 4 are arranged to be further convenient for introducing the fallen objects.

As shown in attached figures 1 and 2, the heights of the bottom ends of the four-piece fishing claws 4 are different. Thereby facilitating further introduction of the drop.

As shown in fig. 1 and 2, a threaded hole capable of being in threaded connection with a weighting rod is formed in the top of the upper joint 2. Since the connection of the upper joint 2 and the weighted rod is facilitated.

As shown in the attached drawings 1 and 2, a plurality of rows of flexible inner hook teeth are axially arranged on the inner wall of the lower part of the salvaging barrel 1, and each row of flexible inner hook teeth comprises steel wire inner hook teeth 5 and nickel-copper welding wire inner hook teeth 6 which are alternately distributed along the circumferential direction of the inner wall of the lower part of the salvaging barrel 1. According to the demand, the hook 5 is made by the steel wire in the steel wire, the hook 6 is made by the nickel-copper welding wire in the nickel-copper welding wire, the steel wire has less toughness and great rigidity, the nickel-copper welding wire has great toughness and less rigidity, and then through the steel wire in the hook 5 and the nickel-copper welding wire in the hook 6 alternate distribution not only be convenient for introduce the junk and salvage in the barrel 1, can also be better block the junk, reduced and promoted the in-process and taken place junk probability of droing, salvage efficiency has been improved.

As shown in fig. 1 and 2, the steel wire inner hook teeth 5 are cylindrical and have a diameter ranging from 2.5mm to 3mm, and the nickel-copper welding wire inner hook teeth 6 are cylindrical and have a diameter ranging from 2.4mm to 2.6 mm. According to the demand, the diameter of the hook tooth 5 in the steel wire is 2.8mm, and the diameter of the hook tooth 6 in the nickel-copper welding wire is 2.5mm, so that the falling object can be better clamped when the falling object is conveniently introduced.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims

1. The utility model provides a section of thick bamboo is salvaged to split type internal hook tooth, its characterized in that is including salvaging barrel and the top connection that can be connected with the weight rod, the top connection bottom is fixed with salvaging the barrel top, salvaging barrel lateral wall is provided with a plurality of flutings along the circumference interval, every grooved bottom all extends to and salvages terminal surface under the barrel, salvage and be equipped with the internal hook tooth of pliability on the inner wall of barrel lower part, the internal hook tooth bottom of pliability and salvage barrel inner wall fixed connection, the internal hook tooth of pliability is by supreme inside slope of salvaging the barrel down.

2. The split inner hook tooth overshot of claim 1, characterized in that the overshot body side wall is provided with four slots along the circumference at intervals, the sum of the arc length of the outer circumference opening of the overshot body is one half to two thirds of the circumference of the overshot body, the four slots divide the overshot body lower side wall into four-piece overshot claws, the bottom of the four-piece overshot claws are all arranged at the tip.

3. The split inner hook tooth overshot of claim 2, characterized in that the four-piece claw has different bottom heights.

4. The split inner hook tooth overshot as claimed in claim 1, 2 or 3, characterized in that the top of the upper joint is provided with a threaded hole which can be connected with the weight rod by screw thread.

5. The split inner hook tooth overshot of claim 1, 2 or 3, characterized in that a plurality of rows of flexible inner hook teeth are arranged on the inner wall of the lower part of the overshot cylinder body in the axial direction, and each row of flexible inner hook teeth comprises steel wire inner hook teeth and nickel-copper welding wire inner hook teeth which are alternately distributed along the circumferential direction of the inner wall of the lower part of the overshot cylinder body.

6. The split inner hook tooth overshot of claim 4, characterized in that a plurality of rows of flexible inner hook teeth are arranged on the inner wall of the lower portion of the overshot cylinder body in the axial direction, and each row of flexible inner hook teeth comprises steel wire inner hook teeth and nickel-copper welding wire inner hook teeth which are alternately distributed along the circumferential direction of the inner wall of the lower portion of the overshot cylinder body.

7. The split inner hook overshot of claim 5, characterized in that the steel wire inner hook is cylindrical and has a diameter in the range of 2.5mm to 3mm, and the nickel copper wire inner hook is cylindrical and has a diameter in the range of 2.4mm to 2.6 mm.

8. The split inner hook overshot of claim 6, characterized in that the steel wire inner hook is cylindrical and has a diameter in the range of 2.5mm to 3mm, and the nickel copper wire inner hook is cylindrical and has a diameter in the range of 2.4mm to 2.6 mm.