CN219570033U

CN219570033U - Hydraulic and pneumatic locking device for derrick

Info

Publication number: CN219570033U
Application number: CN202320703957.7U
Authority: CN
Inventors: 王帅; 于焉君; 刘海龙; 王丽萍; 于军
Original assignee: Tonghua Petrochemical Machinery Manufacturing Co ltd
Current assignee: Tonghua Petrochemical Machinery Manufacturing Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-08-22
Anticipated expiration: 2033-04-03

Abstract

The utility model relates to the field of oil extraction equipment, in particular to a hydraulic and pneumatic locking device of a derrick, which is suitable for locking application between an upper derrick and a lower derrick of petroleum workover and drilling equipment. A hydraulic cylinder or an air cylinder is connected to a lower section of derrick at the joint of the derricks, the front end of a piston of the hydraulic cylinder or the air cylinder is connected with a locking pin shaft, a lower connecting lug is welded on the lower section of derrick corresponding to the locking pin shaft, and the locking pin shaft is inserted into sliding connection with the lower connecting lug; an upper connecting lug is welded on the upper derrick, and an annular hole at the outer end of the upper connecting lug can be transversely clamped at a passage of a locking pin shaft of the lower connecting lug. Has the characteristics of simple operation, low labor intensity and high safety.

Description

Hydraulic and pneumatic locking device for derrick

Technical Field

The utility model relates to the field of oil extraction equipment, in particular to a hydraulic and pneumatic locking device of a derrick, which is suitable for locking application between an upper derrick and a lower derrick of petroleum workover and drilling equipment.

Background

In the prior art, a mechanical locking mechanism 10 (see fig. 3) is mostly adopted for an upper section derrick and a lower section derrick locking mechanism of a petroleum well repairing and drilling and production working machine, namely, the upper section derrick 1 is provided with a screw 11, the lower section derrick 3 is provided with a nut fixing groove, and the mechanical locking mode of clamping is realized through nuts. The labor intensity is high, operators are in wellhead dangerous area operation, operators need to climb to the joint parts of the upper derrick and the lower derrick through the ladder to operate aloft, and the like, and the existing structure cannot meet the actual operation requirements.

Disclosure of Invention

The utility model aims to provide the hydraulic and pneumatic locking device of the derrick, which has the advantages of reasonable structure, low labor intensity and safe operation and does not need overhead operation.

The technical scheme of the utility model is as follows: a hydraulic and pneumatic locking device of a derrick is characterized in that a hydraulic cylinder or an air cylinder is connected to a lower derrick at the joint of the derricks, the front end of a piston of the hydraulic cylinder or the air cylinder is connected with a locking pin shaft, a lower connecting lug is welded on the lower derrick corresponding to the locking pin shaft, and the locking pin shaft is inserted into sliding connection with the lower connecting lug; an upper connecting lug is welded on the upper derrick, and an annular hole at the outer end of the upper connecting lug can be transversely clamped at a passage of a locking pin shaft of the lower connecting lug.

The locking devices are used in pairs in one side of the derrick.

The utility model has the advantages that: 1. the operation is simple, and the labor intensity is low. 2. The operator is far away from the dangerous area of the wellhead, and the remote hydraulic control or the pneumatic control is realized, so that high-altitude operation is not needed, and the safety is high.

Embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the present utility model in use.

Fig. 2 is a schematic view of the structure of the present utility model in the direction K of fig. 1.

Fig. 3 is a schematic diagram of the mechanical locking structure of the upper and lower derricks before modification.

Detailed Description

Referring to fig. 1-3, an upper section derrick 1, a hydraulic or pneumatic locking device 2, a lower section derrick 3, a lower connecting lug 4, an upper connecting lug 5, a locking pin 6, a hydraulic cylinder or air cylinder 7, a channel 8, a hinge point 9, a mechanical lock 10 and a screw 11.

Referring to fig. 1, the oil drilling and production derrick comprises an upper derrick 1 and a lower derrick 3, and the upper derrick and the lower derrick are movably connected. The upper derrick 1 can rotate freely around the hinge point 9 and is in an unlocking state. A hydraulic or pneumatic locking device 2 is arranged between the upper section derrick 1 and the lower section derrick 3 and is used for locking connection, namely a derrick hydraulic or pneumatic locking device.

Referring to fig. 2, the schematic diagram of the structure of fig. 1-K is shown. A hydraulic and pneumatic locking device of a derrick comprises a hydraulic cylinder or an air cylinder 7 connected to a lower derrick 3 at the joint of the derricks, wherein the front end of a piston of the hydraulic cylinder or the air cylinder 7 is connected with a locking pin shaft 6 to drive the locking pin shaft 6 to horizontally move. The lower joint derrick 3 is welded with a lower connecting lug 4 corresponding to the locking pin shaft 6, and the locking pin shaft 6 is inserted into sliding connection with the lower connecting lug 4. The upper joint derrick 1 is welded with an upper connecting lug 5 (L-shaped), and the annular hole at the outer end of the connecting arm of the upper connecting lug 5 can be transversely clamped at the position of the locking pin shaft 6 of the lower connecting lug 4 through a channel 8, so that the locking pin shaft 6 can be inserted into the annular hole at the outer end of the connecting arm of the upper connecting lug 5 when in a locking state. The locking devices are used in pairs in one side surface of the derrick, namely, one locking device is respectively arranged on the left side and the right side of the facing surface of the derrick K in fig. 1, and two locking points are arranged.

Referring to fig. 2, an upper joint lug 5 is welded on the upper joint derrick 1. The lower joint derrick 3 is welded with a lower connecting lug 4, a hydraulic cylinder or an air cylinder 7 is arranged on the lower joint derrick, and a locking pin shaft 6 is welded at the end part of a piston rod of the cylinder. After the upper section derrick 1 and the lower section derrick 3 are aligned in place, the holes of the upper connecting lug 5 and the lower connecting lug 4 are in a coaxial state, a liquid source or an air source is supplied to the cylinder by a control liquid air path valve element, a piston rod pushes a locking pin shaft 6 to sequentially penetrate through the upper connecting lug 5 and the lower connecting lug 4, all degrees of freedom of the system are limited, and at the moment, the upper section derrick and the lower section derrick cannot be separated and are in a locking state. On the contrary, the control liquid gas circuit valve member is used for supplying liquid source or gas source to the cylinder, the piston rod pulls the locking pin shaft 6 to sequentially withdraw from the upper connecting lug 5 and the lower connecting lug 4, at the moment, the upper section derrick 1 and the lower section derrick 3 can be separated, and the upper section derrick 1 can freely rotate around the hinge point and is in an unlocking state.

The operator is on the ground and far away from the dangerous area of the wellhead, and controls the hydraulic cylinder or the cylinder piston rod to drive the locking pin shaft 6 to pass through or separate the upper and lower connecting lugs 5 and 4 by operating the corresponding control valve, so as to achieve the purpose of locking or unlocking the connection state of the upper and lower section derricks 1 and 3.

The above description is only of specific embodiments of the present utility model, and the various illustrations do not limit the essential content of the present utility model.

Claims

1. A hydraulic and pneumatic locking device of a derrick is characterized in that a hydraulic cylinder or an air cylinder (7) is connected to a lower derrick (3) at the joint of the derricks, the front end of a piston of the hydraulic cylinder or the air cylinder (7) is connected with a locking pin shaft (6), a lower connecting lug (4) is welded on the lower derrick (3) corresponding to the locking pin shaft (6), and the locking pin shaft (6) is in sliding connection with the lower connecting lug (4) in an inserted manner; an upper connecting lug (5) is welded on the upper derrick (1), and a locking pin shaft (6) of the lower connecting lug (4) can be transversely clamped at a position of a passage (8) through an annular hole at the outer end of the upper connecting lug (5).

2. A hydraulic and pneumatic locking device for a derrick as claimed in claim 1, wherein said locking devices are used in pairs in a side of the derrick.