CN214887023U - Hinge type anti-falling device - Google Patents

Abstract

The utility model discloses a hinge type anti-drop device belongs to oil well test technical field, specifically is a steel wire fracture prevents that instrument from dropping down downhole anti-drop device, including anti-drop device main part, lower end cap, spring, bottom end rail, round pin axle, torsional spring, gyro wheel arm, gyro wheel, connecting axle, top connection, the bottom end rail hangs through the spring and arranges in down on the end cap, hinge arm mechanism is installed to the tip of bottom end rail, the hinge arm mechanism other end and connecting axle are connected. The utility model provides an anti-falling device is in the free fall state after the steel wire fracture, and the instrument makes the outside extension of hinge arm mechanism through weightlessness, and slope and gyro wheel contact friction carry out the card and die, and the spring is supplementary to be hung simultaneously, avoids the instrument gliding.

Description

Hinge type anti-falling device

Technical Field

The utility model relates to an oil well test technical field specifically is a steel wire fracture prevents that instrument from dropping down the ware of preventing falling in the pit.

Background

In the steel wire well testing operation, the instrument string is put into the shaft through the well testing steel wire, because the well testing steel wire is used for a long time, corrosion and twisting easily occur, or the instrument string is blocked in the well, the steel wire is lifted and broken, the instrument string falls into the well, the instrument causes later fishing difficulty and instrument impact damage after falling into the well, the prior underground anti-falling device generally adopts a slip type anti-falling mechanism, for example, the Chinese utility model with the application number of CN201120371387.3 discloses a double-lug screw type anti-falling device which comprises a coupling and a joint which are coaxially connected together, a centering pin and a pin hole are respectively arranged on the contact end surfaces of the coupling and the joint, a screw rod is arranged in the central through hole of the joint, the upper end of the screw rod extends into the bottom surface hole of the coupling, the lower end of the screw rod is arranged in the lower end of the joint through a thrust bearing, chutes are respectively and symmetrically arranged on the two axial side walls of the joint, the spout bottom surface is the plane, the spout top surface is the inclined plane, a guide holder and a compression spring are being set up by last cooperation respectively under to on the hob, a linking arm is being articulated respectively to the both sides of guide holder, the linking arm holds in the spout, a gyro wheel is being installed respectively to the linking arm free end, this anti-falling device is after the well that falls, under the free fall state, the gyro wheel is pressed down the card at the oil pipe inner wall by the centrum, prevent that the instrument cluster from falling into in the pit, because the instrument is that the gyro wheel passes through centrum whereabouts card on the oil pipe inner wall, there is not the power of pushing down on the centrum, and is unstable, the easy landing is in the pit, slips and oil pipe inner wall sliding friction, can not realize the card at once and prevent falling the function, need slide one section down and can realize the card and hang.

Disclosure of Invention

The technique that exists is not enough to the aforesaid, the utility model aims at providing a hinge type anti-falling device can realize fast that the card to the instrument that drops is dead to be prevented falling, avoids the instrument to glide along the pipe wall.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a hinge type anti-falling device, including anti-falling device main part, lower end cap, spring, bottom end rail, round pin axle, torsional spring, gyro wheel arm, gyro wheel, connecting axle, top connection, the bottom end rail is hung through the spring and is arranged in on the lower end cap, hinge arm mechanism is installed to the tip of bottom end rail, the hinge arm mechanism other end and connecting axle are connected.

Preferably, the falling prevention device main body is provided with a slope corresponding to the position of the roller.

Preferably, a hinge shaft is fixedly arranged in the middle of the falling prevention device main body.

Preferably, the hinge arm mechanism consists of six hinges which are connected end to end through rivets, and the middle parts of the two hinges penetrate through the hinge shafts.

Preferably, the roller surface is provided with a pattern.

The beneficial effects of the utility model reside in that: the utility model provides an anti-falling device is in the free fall state after the steel wire fracture, and the instrument makes the outside extension of hinge arm mechanism through weightlessness, and slope and gyro wheel contact friction block and die, and the spring is supplementary to be hung simultaneously, avoids the instrument to slide along the pipe wall.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a sectional view of a hinge type drop preventer provided by the present invention;

fig. 2 is a cross-sectional view of the hinge type anti-drop device provided by the present invention, which is rotated 90 ° in the axial direction;

fig. 3 is a cross-sectional view of the hinge type anti-drop device provided by the present invention when it is stuck;

fig. 4 is a cross-sectional view of the hinge-type anti-drop device provided by the present invention rotating 90 degrees along the axial direction when the hinge-type anti-drop device is locked.

Description of reference numerals: 1-anti-falling device main body, 2-lower plug, 3-spring, 4-lower beam, 5-pin shaft, 6-torsion spring, 7-roller arm, 8-roller, 9-rivet, 10-hinge arm mechanism, 11-hinge shaft, 12-connecting shaft, 13-upper joint and 14-oil pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment 1, as shown in fig. 1 to 4, a hinge type drop preventer includes a drop preventer main body 1, a lower plug 2, a spring 3, a lower beam 4, a pin 5, a torsion spring 6, a roller arm 7, a roller 8, a connecting shaft 12, and an upper joint 13, where the lower beam 4 is suspended on the lower plug 2 by the spring 3, a hinge arm mechanism 10 is installed at an end of the lower beam 3, and the other end of the hinge arm mechanism 10 is connected to the connecting shaft 12.

Furthermore, the falling-proof device main body 1 is provided with a slope corresponding to the position of the roller 8, and can push the roller 8, so that the roller 8 compresses the hinge arm mechanism 10 and is unfolded outwards,

Furthermore, the surface of the roller 8 is provided with patterns, so that the friction force between the roller 8 and the inner wall of the oil pipe 14 is increased, and the anti-falling device is convenient to clamp and fix.

Furthermore, a hinge shaft 11 is fixedly arranged in the middle of the anti-falling device main body 1, the hinge arm mechanism 10 is composed of six hinges, the hinges are connected end to end through rivets 9, the middle parts of the two hinges penetrate through the hinge shaft 11, and the expansion and contraction of the hinge arm mechanism 10 can be realized.

Firstly, connecting the hinge type anti-drop device to an instrument string to complete installation; when a steel wire is suddenly broken, the lower cross beam 4 is upwards popped under the action of the spring 3 at the lower part of the drop preventer, and meanwhile, the roller arm 7 is driven to push the roller 8 to upwards move along the inclined plane on the drop preventer main body 1, so that the tool is prevented from sliding downwards; meanwhile, due to the weight loss of the instrument, the upper joint 13 drives the connecting shaft 12 to move downwards, the hinge arm mechanism 10 is compressed, the hinge arm mechanism 10 is in a contracted state and expands outwards, the lower beam 4 is pulled to move upwards at the same time, so that the movement of the roller 8 along the upper inclined plane of the anti-drop device main body 1 is completed, the roller 8 is supported on the inner wall of the oil pipe 14, the suspension on the oil pipe 14 is realized, the instrument is prevented from dropping into the underground, as shown in the state change of fig. 1 and 3, the whole anti-drop device is not changed under the matching action of the hinge arm structure and the compression spring, and the device is prevented from sliding downwards.

When an instrument falls into the underground and needs to be salvaged, a salvage tool salvages an instrument string, an upper connector 13 is pulled to drive a connecting shaft 12 to move upwards, the connecting shaft 12 pulls a hinge arm mechanism, the hinge arm mechanism 10 is stretched, meanwhile, a lower cross beam 2 is pushed downwards, and the lower cross beam 2 compresses a spring 3; the roller arm 7 is retracted, the roller 8 is retracted in the anti-drop device body 1, the suspension is released, the roller 8 is retracted in the anti-drop device body 1 at the moment and is not in contact with the oil pipe 14, and the hinge arm mechanism 10 is in a stretching state, so that the fishing is convenient.

The utility model provides an anti-falling device is in the free fall state after the steel wire fracture, and the instrument makes the outside extension of hinge arm mechanism through weightlessness, and slope and gyro wheel contact friction block and die, and the spring is supplementary to be hung simultaneously, avoids the instrument to slide along the pipe wall.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (5)

1. The utility model provides a hinge type anti-falling device, includes anti-falling device main part, lower end cap, spring, bottom end rail, round pin axle, torsional spring, gyro wheel arm, gyro wheel, connecting axle, top connection, its characterized in that, the bottom end rail is hung through the spring and is arranged in on the lower end cap, hinge arm mechanism is installed to the tip of bottom end rail, the hinge arm mechanism other end is connected with the connecting axle.

2. The hinge type drop preventer according to claim 1, wherein the drop preventer body is provided with a slope corresponding to a position of the roller.

3. The hinge type drop preventer of claim 1, wherein a hinge shaft is fixedly disposed at a central portion of the drop preventer body.

4. A hinged fall arrestor as claimed in claim 3 wherein the hinge arm mechanism is comprised of six hinges connected end to end by rivets with the middle two hinges passing through the hinge axis.

5. A hinged fall arrestor as claimed in claim 1 wherein the roller surface is textured.

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