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Lift sub anti-drop method used for oil drilling

A technology of elevators and petroleum, which is applied in the direction of drill pipes, drill pipes, drilling equipment, etc., and can solve the problems that locking screws are easy to break, lifting rings are time-consuming, and difficult to take out, etc.

Active Publication Date: 2015-02-25
CHENGDU ZHUOXIN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the defects of time-consuming and labor-intensive putting in and taking out the lifting ring of the above-mentioned elevator ring preventer, and the defects that the fingers are injured and the locking screw is easy to break and difficult to take out, the present invention provides a method for preventing the lifting of the elevator used in oil drilling. The card anti-off method can effectively limit the ring in the ear hole of the lifting ear, and will not fall off, avoiding the occurrence of major safety accidents caused by lifting with a single ring. When in use, the lifting ring is light, time-saving and labor-saving, and safe. And there is no need to replace the locking screw, which reduces the cost of use

Method used

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  • Lift sub anti-drop method used for oil drilling
  • Lift sub anti-drop method used for oil drilling
  • Lift sub anti-drop method used for oil drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Example 1

[0070] Such as figure 1 , Image 6 with Figure 19 As shown, this embodiment includes an elevator main body 1 and a lifting lug 3, and the lifting lug 3 is provided with an ear hole 4 and a notch 30, the ear hole 4 is used to place a lifting ring, and an anti-off device is installed in the notch 30, Described anti-off device comprises block 2, rotating shaft 5, core cover 24, bead 23 and torsion spring, and core cover 24 outer surface is provided with chute 25, and block 2 inner surface is provided with draw-in groove 213, and small One part of the ball 23 is placed in the chute 25, the other part is placed in the card slot 213, the core sleeve 24 is set on the rotating shaft 5, the torsion spring is set on the rotating shaft 5 and connected to the stopper 2, and the stopper 2 rotates around The shaft 5 performs resetting, locking, and closed cycle movements in sequence. The stopper 2 includes a blocking part 21 and an operating part 20. The blocking part...

Embodiment 2

[0077] Such as figure 1 , Figure 7 with Figure 19 As shown, this embodiment is basically the same as Embodiment 1, the difference is:

[0078] The chute 25 has a depth of 1.5mm and a width of 3mm. The locking groove 213 is an arc-shaped groove parallel to the rotating shaft 5. The depth of the locking groove is 1.5mm and the width is 3mm.

[0079] The small ball 23 is a small steel ball with a diameter of 3 mm.

[0080] The torsion spring is a helical torsion spring 27 , and a locking screw 22 is arranged on the stopper 2 , and the locking screw 22 is connected to the helical torsion spring 27 .

[0081] The rotating shaft 5 is provided with a slot 50, a keyway 51 and a threaded hole, the slot 50 is used to install the helical torsion spring 27, the keyway 51 is used to place the locking key 52, and the threaded hole is used to connect Rotate the shaft nail cover 53, the lifting lug is provided with the rotation shaft hole for the rotation shaft 5 to penetrate, the nail ...

Embodiment 3

[0083] Such as figure 1 , Figure 8 with Figure 19 As shown, this embodiment is basically the same as Embodiment 1, the difference is:

[0084] The chute 25 has a depth of 2mm and a width of 4mm. The locking groove 213 is an arc-shaped groove parallel to the rotating shaft 5. The depth of the locking groove is 2mm and the width is 4mm.

[0085] The pellets are pellets made of FRP with a diameter of 4mm.

[0086] The torsion spring is a disc-type torsion spring 26 , and the inner surface of the stopper 2 is provided with a protrusion 28 , and the protrusion 28 is in contact with the disc-type torsion spring 26 .

[0087] The rotating shaft 5 is provided with a slot 50, a keyway 51 and a threaded hole, the slot 50 is used to install the disc torsion spring 26, the keyway 51 is used to place the locking key 52, and the threaded hole is used to connect Rotate the shaft nail cover 53, the lifting lug is provided with the rotation shaft hole for the rotation shaft 5 to penetrat...

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Abstract

The invention discloses a lift sub anti-drop method used for oil drilling. A lug hole and a notch are formed in each lifting lug of a lift sub. An anti-drop device is installed inside each notch and comprises a rotation shaft and a link stopper, wherein the link stopper comprises a stop part and an operation part. When a lifting ring is ready to be installed in the lug holes of the lifting lugs, the operation parts of the link stoppers are operated and enable the stop parts of the link stoppers to be arranged in the notches in the lifting lugs and to be locked and positioned, and the lifting ring is placed. Then, the operation parts of the link stoppers are again operated, the stop parts of the link stoppers are arranged outside the notches in the lifting lugs, and the lifting ring is clamped. The operation parts of the link stoppers are operated, the stop parts of the link stoppers are again arranged in the notches in the lifting lugs and locked and positioned, and the lifting ring is taken out. After the lifting ring is taken out, the operation parts of the link stoppers are operated, the stop parts of the link stoppers are arranged outside the notches in the lifting lugs, and the original state is restored. According to the method, the lifting ring can move only in the lug holes in the lifting lugs and can not drop out of the lug holes in the lifting lugs. Major safety accidents caused by dropping of the lifting ring are avoided, and taking and placing of the lifting ring are time-saving, labor-saving and safe.

Description

technical field [0001] The invention belongs to the field of oil drilling, in particular to an elevator used for oil drilling to prevent falling off. Background technique [0002] In oil drilling construction operations, the elevator is an indispensable tool for lifting the drill string. It connects the lifting ring and lifts the drill string. During use, the rings can easily escape from the ear holes of the elevators, causing major safety accidents. ACCIDENT. The common anti-off device uses a bolt, which is to set a longitudinal bolt hole at the elevator lug, and then insert a bolt at the bolt, and the bolt can prevent the ring from falling off from the elevator lug. This anti-off device is simple in structure, easy to process, but there are many shortcomings in this bolt type anti-off device: [0003] a. Since the latch is not fixed in the latch hole, the latch may fall out of the latch hole. If it hits a person, it will cause a safety accident. If the latch falls into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/06
Inventor 陈伦俊池振华卢伟张洪
Owner CHENGDU ZHUOXIN IND
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