CN215672102U

CN215672102U - Throw and drag for ware camber adjusting device

Info

Publication number: CN215672102U
Application number: CN202121972488.6U
Authority: CN
Inventors: 刘春香
Original assignee: Tianjin Huayu Bochuang Petroleum Technology Development Co ltd
Current assignee: Tianjin Huayu Bochuang Petroleum Technology Development Co ltd
Priority date: 2021-08-21
Filing date: 2021-08-21
Publication date: 2022-01-28
Anticipated expiration: 2031-08-21

Abstract

The utility model provides a bending degree adjusting device of a throwing and fishing device, which comprises an upper joint, a lower joint and a rotating core body, wherein the rotating core body comprises a core rod, the lower end of the core rod is provided with a spherical structure, the upper part of the core rod is connected with the upper joint, the lower joint is internally provided with an inner cavity capable of accommodating the lower part of the core rod, the spherical structure is positioned in the inner cavity, the contact surface of the inner cavity and the spherical structure is provided with a concave surface matched with the spherical structure, and the spherical structure is limited in the inner cavity and can rotate in the inner cavity. The utility model has the advantages of helping the over-bending of the throwing and fishing device main body, compact and simple structure, combined use, convenient operation and the like.

Description

Throw and drag for ware camber adjusting device

Technical Field

The utility model relates to the technical field of downhole operation tools, in particular to a throw-drag apparatus curvature adjusting device.

Background

The throwing and fishing device is an underground tool matched with a water distributor for use, is used for throwing and fishing a blanking plug in an eccentric water distributor, and is an essential tool for replacing a water nozzle of the blanking plug. The throwing and fishing device in the prior art has the defects of poor over-bending capability in a well with large inclination due to the longer axial dimension, and influences the throwing and fishing operation efficiency.

Disclosure of Invention

The utility model aims to provide a bending degree adjusting device of a throwing and fishing device, which solves the problem of bending of the throwing and fishing device in a highly-deviated well. The utility model has the conception that a mechanism capable of freely rotating within a certain angle is additionally arranged at the middle position of the existing throwing and fishing device so as to increase the over-bending capacity of the throwing and fishing device, and as the environment in a well is complex, not only is alkaline solution (chemical flooding) exist, but also a large amount of silt is doped in the solution, so that how to make the corrosion prevention and the sealing of the mechanism is one of the technical problems to be considered; in addition, because the ware of salvaging can produce stronger vibrations in the operation of pit shaft, consequently adopt what kind of connected mode to realize the connection between each part of adjusting device, can make things convenient for the dismouting, can avoid again to connect the position and take place not hard up in vibrations, is this novel another technical problem that needs to consider.

In order to solve the technical problems, the utility model adopts the technical scheme that: the throw-drag apparatus camber adjusting device comprises an upper joint, a lower joint and a rotating core body, wherein the upper joint and the lower joint are respectively and fixedly connected with a throw-drag apparatus main body in a manner of adopting various conventional connection modes such as threaded connection, key, clamping hook, spline, pin connection, interference connection, welding, bonding, riveting and the like;

the rotary core body comprises a core rod, the lower end of the core rod is provided with a spherical structure, the upper part of the core rod is connected with the upper joint, the lower joint is internally provided with an inner cavity capable of accommodating the lower part of the core rod, the spherical structure is positioned in the inner cavity, the contact surface of the inner cavity and the spherical structure is provided with a concave surface matched with the spherical structure, and the spherical structure is limited in the inner cavity and can rotate in the inner cavity. When the throwing and fishing device is bent, the spherical structure and the concave surface are matched with each other, so that the core rod can rotate for a certain angle in the range of a gap between the inner cavity and the core rod, and the throwing and fishing device is helped to be bent smoothly.

Furthermore, in order to facilitate manufacturing and assembling of parts, a universal sphere center and a ball seat are arranged and are respectively used for bearing the spherical structure and the concave surface.

Furthermore, due to the complex underground operation environment, in the operation of the throwing and fishing device, a silt solution enters a gap between the core rod and the inner cavity, so that the gap is blocked, the core rod cannot rotate, and the function of curvature adjustment is lost, aiming at the problem, the inventor provides two ideas, namely adding a filtering structure to filter silt entering the gap, but even if the silt is filtered, chemical flooding entering the gap can also corrode the spherical structure and the concave surface, so that the rotation of the core rod is influenced; and the other method is to seal the gap, so that the problems of sand blockage and corrosion of parts can be solved simultaneously. Therefore, a proper sealing mode needs to be selected, and the gap between the core rod and the inner cavity is sealed on the premise of not influencing the free rotation of the core rod during bending. Finally, the inventor selects a sand control sealing cylinder made of rubber as a preferable sealing element, the sealing element is sleeved outside the core rod, the lower end face of the sealing element is positioned at a gap between the inner cavity and the core rod, and the lower part of the sand control sealing cylinder seals the gap between the inner cavity and the core rod, which is close to the outlet of the inner cavity. By using the elasticity of the rubber, the gap between the core rod and the inner cavity can be effectively sealed on the premise of not influencing the rotation of the core rod.

Furthermore, because the throwing and fishing device can generate strong vibration in the process of underground operation, how to ensure that key components in the bending adjusting device, namely the connecting part between the core rod and the upper joint cannot be loosened in the vibration process is an important technical problem for ensuring the normal work of the bending adjusting device. The preferable technical scheme for solving the technical problem is as follows: the upper joint is internally provided with a connecting cavity capable of accommodating the upper part of the core rod, a spring claw is arranged in the connecting cavity and comprises a fixing ring and a plurality of spring claw rods, the fixing ring is fixed on the inner wall of the connecting cavity, the fixing ring is coaxial with the connecting cavity, one end of each spring claw rod is fixed on the fixing ring, and the other end of each spring claw rod inclines towards the inside of the connecting cavity;

the upper end of the core rod is provided with a conical table, and when the upper end of the core rod extends into the connecting cavity, the end part of the spring claw rod is abutted against the bottom surface of the conical table.

Furthermore, in order to facilitate the disassembly and assembly of the core rod and the upper joint, the connection mode of the fixing ring and the upper joint is set to be that the fixing ring is provided with a plurality of threaded holes, the upper joint is provided with pin holes corresponding to the threaded holes one to one, and the fixing ring is connected with the upper joint through fixing pins penetrating through the threaded holes and the pin holes.

The utility model has the advantages and positive effects of reasonable structural design, compact and simple structure, combined use, convenient operation and the like.

Drawings

FIG. 1 is a schematic view, partly in section, of the overall structure in a first embodiment of the utility model;

FIG. 2 is a schematic sectional view of a part of the second embodiment;

in the figure: 1-rope cap; 2-a weighting bar; 3-a spring jar; 4-upper joint; 5-core bar; 6, a sand prevention sealing cylinder; 7-lower joint; 8-ball seat; 9-throwing and fishing device main body; 10-universal sphere center; 11-a conical table; 12-a fixed ring; 13-spring pawl lever; 14-fixed pins.

Detailed Description

The working and using states of the camber adjusting device of the present invention will now be described by taking the fishing device designed in patent No. 200620138320.4 (9) as an example.

The first embodiment is as follows:

as shown in figure 1, the utility model provides a bending degree adjusting device of a throwing and fishing device, the device is positioned between a spring jar 3 and a throwing and fishing device main body 9 in the throwing and fishing device and comprises an upper joint 4, a lower joint 7 and a rotating core body, wherein the upper joint 4 is in threaded connection with the spring jar 3, the lower joint 7 is in threaded connection with the throwing and fishing device main body 9, the rotating core body comprises a core rod 5 and a universal sphere center 10, the upper part of the core rod 5 is in threaded connection with the upper joint 4, an inner cavity capable of accommodating the universal sphere center 10 is formed in the lower joint 7, a ball seat 8 is arranged in the inner cavity, a contact surface of the ball seat 8 and the universal sphere center 10 is provided with a concave surface matched with a spherical structure, and the universal sphere center 10 is limited in the inner cavity and can rotate in the inner cavity.

In order to realize the sealing of the gap between the core rod 5 and the inner cavity, the sand control sealing device further comprises a sand control sealing cylinder 6, the sand control sealing cylinder 6 is sleeved outside the core rod 5, the sand control sealing cylinder 6 is made of rubber, the lower end face of the sand control sealing cylinder 6 extends into the inner cavity of the lower joint 7, the lower end face of the sand control sealing cylinder 6 is positioned in the gap between the inner cavity and the core rod 5, and the gap between the inner cavity and the core rod 5 and close to the outlet position of the inner cavity is sealed by the lower part of the sand control sealing cylinder 6.

The camber adjusting device can be randomly bent to +/-4 degrees when the throwing and fishing device meets a blockage.

Example two:

as shown in fig. 2, on the basis of the first embodiment, the connection mode between the core rod 5 and the upper joint 4 is improved to overcome the problem of looseness of the core rod 5 caused by vibration in the operation process, and the specific scheme is as follows: a connecting cavity capable of accommodating the upper part of the core rod 5 is formed in the upper joint 4, a spring claw is arranged in the connecting cavity and comprises a fixing ring 12 and a plurality of spring claw rods 13, the fixing ring 12 is fixed on the inner wall of the connecting cavity, the fixing ring 12 is coaxial with the connecting cavity, one end of each spring claw rod 13 is fixed on the fixing ring 12, and the other end of each spring claw rod inclines towards the inside of the connecting cavity;

the upper end of the core rod 5 has a conical abutment 11, and when the upper end of the core rod 5 penetrates inside the connection cavity, the end of the spring finger 13 abuts against the bottom surface of the conical abutment 11.

The fixing ring 12 is provided with a plurality of threaded holes, the upper joint is provided with pin holes corresponding to the threaded holes one by one, and the fixing ring 12 is connected with the upper joint 4 through fixing pins 14 penetrating through the threaded holes and the pin holes.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. Throwing and dragging for ware camber adjusting device, its characterized in that: including top connection, lower clutch and rotation core, the rotation core includes the core bar, the lower extreme of core bar has spherical structure, the upper portion of core bar with top connection, have in the lower clutch and to hold the inner chamber of core bar lower part, spherical structure is located in the inner chamber, the inner chamber with spherical structure's contact surface have with the concave surface of spherical structure adaptation, spherical structure spacing in the inner chamber, and can the inner chamber internal rotation.

2. The bailer camber adjustment device of claim 1, wherein: the lower end of the core rod is provided with a universal sphere center, the spherical structure is positioned on the universal sphere center, the lower joint is internally provided with a ball seat, and the concave surface matched with the spherical structure is positioned on the ball seat.

3. The bailer camber adjustment device of claim 1 or 2, wherein: the lower end face of the sand control sealing cylinder is positioned in a gap between the inner cavity and the core rod, and the lower part of the sand control sealing cylinder seals the gap between the inner cavity and the core rod, which is close to the outlet of the inner cavity.

4. The bailer camber adjustment device of claim 3, wherein: the upper joint is internally provided with a connecting cavity capable of accommodating the upper part of the core rod, a spring claw is arranged in the connecting cavity and comprises a fixing ring and a plurality of spring claw rods, the fixing ring is fixed on the inner wall of the connecting cavity, the fixing ring is coaxial with the connecting cavity, one end of each spring claw rod is fixed on the fixing ring, and the other end of each spring claw rod inclines towards the inside of the connecting cavity;

5. The bailer camber adjustment device of claim 4, wherein: the fixing ring is provided with a plurality of threaded holes, the upper joint is provided with pin holes corresponding to the threaded holes one to one, and the fixing ring is connected with the upper joint through fixing pins penetrating through the threaded holes and the pin holes.