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Main tong head clamping mechanism of micro-damage screwing machine

A technology of clamping mechanism and twisting machine, which is applied in drilling equipment, earthwork drilling, drill pipe, etc., can solve the problems of increasing oil field workload and cost, failure of pipe string, corrosion of pipe string, etc., and achieve considerable economic benefits Effect

Inactive Publication Date: 2011-05-18
吴立中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After repeated clamping, the surface of the pipe string will be damaged, and the corrosion of the pipe string will be accelerated after the damage. In severe cases, the pipe string will fail, which greatly increases the workload and cost of oilfield operations

Method used

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  • Main tong head clamping mechanism of micro-damage screwing machine
  • Main tong head clamping mechanism of micro-damage screwing machine
  • Main tong head clamping mechanism of micro-damage screwing machine

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] in figure 1 , 2 In the main pliers clamp head clamping mechanism of a micro-damage screwing machine consists of the lower jaw frame 1, the large gear 2, the jaw plate 3, the roller shaft 4, the bearing spacer 5, the needle bearing 6, the roller 7, and the tooth It is composed of block 8, upper jaw frame 9, screw 10, stop 11, fixed sleeve 12, fixed shaft 13, pin 14, return spring 15, working arc 16, screw 17, and brake disc 18, etc. A working arc 16 is provided on the inner surface of the pliers gear 2 and the working arc 16 is directly processed on the pliers gear 2 or on an additional ramp. Three or more jaw plates 3 are provided in the large gear 2 of the pliers head. The jaw plate 3 is equipped with a roller shaft 4, a roller 7, a tooth block 8 and a return spring 15. The roller shaft 4 is installed in the shaft hole of the jaw plate 3, the roller 7 is stringed on the roller shaft 4, the roller 7 is equipped with a needle bearing 6 and a bearing spacer 5, and the roll...

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Abstract

The invention discloses a main tong head clamping mechanism of a micro-damage screwing machine. The mechanism consists of a tong head gearwheel, a lower jaw plate rack, an upper jaw plate rack, jaw plates, tooth blocks, rollers, roller shafts, return springs, a fixed shaft, a fixed shaft sleeve, a brake disc and the like. The mechanism is structurally characterized in that: three or more jaw plates are arranged in the tong head gearwheel; the roller shafts, the rollers, the tooth blocks and the return springs are arranged on the jaw plates; the inner curved surface of the tong head gearwheel is provided with a working arc; and the lower jaw plate rack, the upper jaw plate rack and the brake disc are connected into a whole by the fixed shaft, the fixed shaft sleeve and screws. The mechanism is a simple and reliable inner curved surface roller climbing multi-jaw plate clamping mechanism, the tooth blocks are made of abrasion-resistant material, and the contact area of the tooth blocks and tubular columns is enlarged so that the tooth blocks play a role in clamping the tubular columns without damaging the tubular columns; and the system has considerable economic benefit.

Description

Technical field [0001] The invention relates to a power tongs for petroleum machinery, in particular to a screwing machine used for screwing up and unloading pipe string joints during oil field pipe string operation. Background technique [0002] The screwing machine is mainly used for the fast loading and unloading of oil pipes and casing threading operations in the oil field. The existing screwing machines generally use outer curved tooth blocks to achieve continuous clamping, and the contact with the pipe string is linear, and the tooth blocks have The harder hardness and sharp tooth tip enable the tooth block to cut into the pipe string, ensuring reliable clamping, so that after each clamping, a certain depth of tooth marks will be bitten on the outer surface of the pipe string. After repeated clamping, the surface of the pipe string will be damaged, which will accelerate the corrosion of the pipe string. In severe cases, the pipe string will fail, which greatly increases the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/16
Inventor 吴立中
Owner 吴立中
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