CN216341932U

CN216341932U - Telescopic derrick limit structure of workover rig

Info

Publication number: CN216341932U
Application number: CN202122721303.0U
Authority: CN
Inventors: 董方杰; 王天林; 王岩鹏; 魏俊凡; 周国栋
Original assignee: Shengli Oilfield Lifeng Petroleum Equipment Manufacturing Co ltd
Current assignee: Shengli Oilfield Lifeng Petroleum Equipment Manufacturing Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-19
Anticipated expiration: 2031-11-09

Abstract

The utility model discloses a telescopic derrick limiting structure of a workover rig, and relates to the field of workover rigs. A workover rig telescopic derrick limiting structure comprises an outer derrick, wherein an inner derrick is arranged inside the outer derrick; the limiting assembly is arranged at the top of the outer derrick and comprises a bottom plate, and limiting plates are respectively arranged at two ends of the bottom plate; in the utility model, the limiting plate adopts a horizontal rotation mode, the stress point is close to the bearing upright post, and the stress condition of the horizontal square tube of the inner and outer headframes is obviously improved; for the internal derrick, a stress point directly acts on the bearing upright post, and the horizontal square pipe is not subjected to bending moment; for the external derrick, the limiting plate is L-shaped and can be tightly attached to the bearing upright post, the stress point is also very close to the bearing upright post, and the bending moment borne by the horizontal square tube is very small; the stress condition of the horizontal square tube of the inner and outer headframes at the position of the limiting structure is greatly improved, and the reliability and the safety of the headframe are improved.

Description

Telescopic derrick limit structure of workover rig

Technical Field

The utility model relates to the technical field of workover rigs, in particular to a limit structure of a telescopic derrick of a workover rig.

Background

The workover rig is a common operation device for an oil field, and a workover rig derrick usually adopts a telescopic structure and is divided into an inner derrick and an outer derrick in order to shorten the transportation size; when the inner derrick rises, the upper part of the outer derrick needs a limiting structure to position the inner derrick, so that the inner derrick is not allowed to fall down, and meanwhile, the axial pressure borne by the inner derrick is transmitted to the outer derrick. Generally, a vertically rotating limiting block is respectively arranged at the middle parts of the left side and the right side; when the inner derrick rises to a required position, the limiting block is screwed out from the inner side of the outer derrick to block a falling channel of the inner derrick, so that the limiting of the inner derrick is realized.

Because the limiting blocks are arranged in the middle of the width of the left side and the right side of the derrick, the stress conditions of the inner derrick and the outer derrick are poor, for the corresponding horizontal square pipes stressed by the inner derrick and the outer derrick, the supporting points are the bearing upright columns at the two ends, the stress points are in the middle, the distance from the stress points to the supporting points is the largest at the moment, the bending moment borne by the square pipes is the largest, and when the load of the derrick is larger, the horizontal square pipes are easy to bend.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model discloses a limit structure of a telescopic derrick of a workover rig, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a workover rig telescopic derrick limit structure includes: the inner derrick is arranged in the outer derrick.

The limiting assembly is arranged at the top of the outer derrick and comprises a bottom plate, and limiting plates are arranged at two ends of the bottom plate respectively.

Preferably, a limiting plate pin shaft is arranged between the inner sides of the two limiting plates and the inner sides of the two ends of the bottom plate.

Preferably, an oil cylinder is arranged between the two limiting plates.

Preferably, the two ends of the oil cylinder are respectively provided with an oil cylinder pin shaft, and one end of the oil cylinder pin shaft is arranged on the outer side of the limiting plate.

Preferably, the left and right sides of outer derrick is provided with horizontal square pipe, the bottom plate sets up in the outside of outer derrick left and right sides horizontal square pipe, the upper surface of bottom plate and the upper surface parallel and level of horizontal square pipe.

The utility model discloses a workover rig telescopic derrick limiting structure, which has the following beneficial effects:

1. in the utility model, the bottom plate of the derrick limiting structure is fixed outside the horizontal square tubes on the left and right sides of the outer derrick; FIG. 1 is a top view of a cross section of a derrick in an unlimited position, at which time an oil cylinder is extended, a limiting plate is rotated until the limiting plate is retracted outside the inner side surface of a horizontal supporting square tube of an outer derrick, and an inner derrick can freely pass through the limiting plate up and down; fig. 2 is a top view of the cross section of the derrick at the limiting position, at the moment, the oil cylinder is shortened, the limiting plate rotates until the limiting plate extends out of the inner side face of the outer derrick horizontal supporting square pipe and presses on the adjacent outer derrick horizontal supporting square pipe, and the inner derrick can fall onto the limiting plate at the moment to play a limiting role.

2. In the utility model, the limiting plate adopts a horizontal rotation mode, the stress point is close to the bearing upright post, and the stress condition of the horizontal square tube of the inner and outer headframes is obviously improved; for the internal derrick, a stress point directly acts on the bearing upright post, and the horizontal square pipe is not subjected to bending moment; for the external derrick, the limiting plate is L-shaped and can be tightly attached to the bearing upright post, the stress point is also very close to the bearing upright post, and the bending moment borne by the horizontal square tube is very small; the stress condition of the horizontal square tube of the inner and outer headframes at the position of the limiting structure is greatly improved, and the reliability and the safety of the headframe are improved.

Drawings

FIG. 1 is a top plan view of a cross-section of a derrick of the utility model in a structural neutral position;

fig. 2 is a top view of a cross section of a derrick in a structural limit position of the present invention.

In the figure: 1. an oil cylinder pin shaft; 2. a limiting plate pin shaft; 3. an oil cylinder; 4. a base plate; 5. a limiting plate; 6. an outer derrick; 7. an inner derrick.

Detailed Description

The embodiment of the utility model discloses a workover rig telescopic derrick limiting structure, as shown in figures 1-2, comprising:

an outer derrick 6, and an inner derrick 7 is arranged inside the outer derrick 6.

The left side and the right side of the top end of the outer derrick 6 are respectively provided with a limiting structure, and the limiting structures limit the inner derrick 7. The derrick is divided into an inner derrick and an outer derrick, when the inner derrick 7 rises, the upper part of the outer derrick 6 needs a limiting structure to position the inner derrick 7, so that the inner derrick 7 cannot fall down, and meanwhile, the axial pressure borne by the inner derrick 7 is transmitted to the outer derrick 6.

Spacing subassembly, spacing subassembly setting is at the top of outer derrick 6, and spacing subassembly includes bottom plate 4, and the both ends of bottom plate 4 are provided with limiting plate 5 respectively.

Wherein two limiting plates 5 are respectively and symmetrically arranged, and the same bottom plate 4 and the limiting plates 5 are arranged on the other side of the outer derrick 6.

And a limiting plate pin shaft 2 is arranged between the inner sides of the two limiting plates 5 and the inner sides of the two ends of the bottom plate 4.

The bottom plate 4 is connected with the limiting plate 5 through a limiting plate pin shaft 2.

An oil cylinder 3 is arranged between the two limit plates 5.

When the oil cylinder 3 extends, the limiting plate 5 rotates until the limiting plate retracts outside the inner side surface of the horizontal supporting square pipe of the outer derrick 6, the oil cylinder 3 shortens, and the limiting plate 5 rotates until the limiting plate extends out of the inner side surface of the horizontal supporting square pipe of the outer derrick 6 and presses on the adjacent horizontal supporting square pipe of the outer derrick 6.

Two ends of the oil cylinder 3 are respectively provided with an oil cylinder pin shaft 1, and one end of the oil cylinder pin shaft 1 is arranged outside the limiting plate 5.

The limiting plate 5 is connected with the oil cylinder 3 through an oil cylinder pin shaft 1.

The left side and the right side of the outer derrick 6 are provided with horizontal square pipes, the bottom plate 4 is arranged on the outer side of the horizontal square pipes on the left side and the right side of the outer derrick 6, and the upper surface of the bottom plate is flush with the upper surface of the horizontal square pipes.

The limiting plate 5 on the bottom plate 4 adopts a horizontal rotation mode, the stress point is close to the bearing upright post, and the stress conditions of the horizontal square pipes of the outer derrick 6 and the inner derrick 7 are obviously improved.

The limiting plate 5 is L-shaped.

Wherein for the outer derrick 6, the limiting plate 5 is L-shaped and can be tightly attached to the bearing upright post, the stress point is also very close to the bearing upright post, and the bending moment borne by the horizontal square tube is very small.

The working principle is as follows: referring to fig. 1 to 2, firstly, before the inner derrick 7 is lifted, the oil cylinder 3 is extended, the limit plate 5 is rotated until the limit plate is retracted outside the inner side surface of the horizontal support square tube of the outer derrick 6, and the inner derrick 7 can freely pass through the inner side surface up and down.

After the inner derrick 7 is lifted to a required position, the oil cylinder 3 is shortened, the limiting plate 5 rotates until the limiting plate extends out of the inner side face of the horizontal supporting square tube of the outer derrick 6 and presses the adjacent horizontal supporting square tube of the outer derrick 6, at the moment, the limiting plate 5 is screwed out of the inner side of the outer derrick 6 to block a falling channel of the inner derrick 7, and the inner derrick 7 can fall onto the limiting plate 5 to realize the limiting of the inner derrick 7.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a workover rig telescopic derrick limit structure which characterized in that includes: the derrick comprises an outer derrick (6), wherein an inner derrick (7) is arranged inside the outer derrick (6); the limiting component is arranged at the top of the outer derrick (6), the limiting component comprises a bottom plate (4), and limiting plates (5) are arranged at two ends of the bottom plate (4) respectively.

2. The workover rig telescoping mast spacing structure of claim 1, wherein: and a limiting plate pin shaft (2) is arranged between the inner sides of the two limiting plates (5) and the inner sides of the two ends of the bottom plate (4).

3. The workover rig telescoping mast spacing structure of claim 1, wherein: an oil cylinder (3) is arranged between the two limiting plates (5).

4. The workover rig telescoping mast spacing structure of claim 3, wherein: and the two ends of the oil cylinder (3) are respectively provided with an oil cylinder pin shaft (1), and one end of the oil cylinder pin shaft (1) is arranged on the outer side of the limiting plate (5).

5. The workover rig telescoping mast spacing structure of claim 1, wherein: the left and right sides of outer derrick (6) is provided with horizontal square pipe, bottom plate (4) set up in the outside of horizontal square pipe of outer derrick (6) left and right sides, the upper surface of bottom plate (4) and the upper surface parallel and level of horizontal square pipe.