A replacement short circuit device
A technology of shorting and piling hammer, applied in construction, infrastructure engineering, sheet pile wall, etc., can solve the problems of thread fatigue failure, reduce the effective service life of the riser, and cannot be used.
Inactive Publication Date: 2017-04-12
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0002] In the process of offshore oil exploration and development, during the hammering operation of the water riser, the end of the conduit needs to be hammered in order to drive it into the ground. It is a weak area. If the piling hammer force directly acts on the lifting short (or protective wire), it may cause direct damage to the water riser thread and make it unusable on site.
The threaded thread of the water riser is repeatedly impacted by the hammering force of piling, which is likely to cause the risk of stress fatigue damage of the threaded thread, reduce the effective service life of the water riser, and take a long time to connect, disassemble and lift the short connection on site, which affects piling Working time
Method used
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[0012] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.
[0013] Such as figure 1 , figure 2 As shown, the present invention is an alternate driving shorting device, which is used between the core bushing of the piling hammer and the water-resisting conduit. The connecting device includes a round pipe body 10, lifting lugs 12 arranged symmetrically on both sides of the round pipe body 10 and above the center of gravity for buckling and shackle, arranged on the top of the round pipe body 10 and connected with the orientation groove Corresponding to the adapted anti-rotation key 11 , the two-stage stepped pin 18 located at the lower end of the circular tube body 10 can cooperate with the end surface of the inner support ring 25 of the water riser 20 . Through the cooperation of the directional groove and the anti-rotation key 11, when the piling hammer hammers downward, the piling hammer...
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The invention discloses a screw protector hammering device used between a pile hammer bushing and a waterproof guide pipe, wherein the pile hammer bushing is provided with an orientating slot; the screw protector hammering device comprises a round pipe body, lifting lugs, an anti-rotation key and a step-shaped pin, wherein the lifting lugs for buckling shackles are symmetrically arranged at the two sides of the round pipe body and are located above the gravity, the anti-rotation key is arranged at the top of the round pipe and is correspondingly applicable to the orientating slot and the stepped pin matched with one end plane of an inner bearing ring in the waterproof guide pipe. Through the cooperation between the orientating slot and the anti-rotation key, the circumferential motion of the anti-rotation key is limited by the orientating slot, so as to prevent the self-rotation of the waterproof guide pipe in a hammering process. The round pipe body is provided with a two-step stepped pin inserted into the water proof guide pipe, one end plane of the lower side ladder is supported on the bearing ring, and the hammering force of pile hammer is directly used for the bearing ring in the waterproof guide pipe as the step surface of a screw protector ladder, so as to protect a screw thread of the waterproof guide pipe.
Description
technical field [0001] The invention relates to a pile driving auxiliary tool, in particular to a replacement driving short-circuit device. Background technique [0002] In the process of offshore oil exploration and development, during the hammering operation of the water riser, the end of the conduit needs to be hammered in order to drive it into the ground. It is a weak area. If the piling hammer force directly acts on the lifting short (or protective wire), it may cause direct damage to the thread of the riser and make it unusable on site. The threaded thread of the water riser is repeatedly impacted by the hammering force of piling, which is likely to cause the risk of stress fatigue damage of the threaded thread, reduce the effective service life of the water riser, and take a long time to connect, disassemble and lift the short connection on site, which affects piling Working time. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the...
Claims
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IPC IPC(8): E02D7/14
CPCE02D7/14
Inventor 李中黄熠段泽辉顾纯巍罗鸣熊永卫同武军马传华闵锐陈树恩王巍刘平柳亚亚
Owner CHINA NAT OFFSHORE OIL CORP