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Yj One Way Shock Absorber - China

price: contact company for price

The YJ type one-way shock absorber (bumper )is a kind of drilling tool .

It can effect shock absorbing and shock reduction by means of elastic

deforming and anticoagulation produced from hydraulic oil under the

outside force . Its advantages such as simple structure , reliable

working performance and easy to maintain can well absorb shocking and

vibrating load from drill strings during drilling operation. Therefore,

using of shock absorber can raise in structure the service life of drill

bit and drill pipe , speed up drilling , get rid of drilling jumping,

well protect surface equipments and drilling tools.

Working principle

The hydraulic shock absorber is connected between drill bit and drill collar, the torque is transferred from top drill string to mandrel. The spline transfers torque to spline outer barrel , oil cylinder and lower sub , then drive drill bit to rotate.

The bit weight is from the which of top drill tool so that drill bit insert drill into formation to break rock into pieces. The drilling mud is fed through bore of drill pipe and drill collar into mandrel of shock absorber, tailpipe , lower sub bore and ejected into bottom well .Because of the uneven bottom well conditions and special structure of cone bit, the drill bit and drill string during drilling operation would produce severe vibration. The hydraulic shock absorber , by means of compressible deformation of compressed liquid under the function of pressure , absorb the energy from drill bit and drill string vibration. Thus, the shock absorber can reduce the vibration and impact load of drill tools.


Company Contact:


  • Phone: +86.182.216.530.83

  • Address: No.2999 ,XinYang Road,FengXian District, Shanghai, China

  • Email: Email


Published date: August 2, 2013 -

  • Business Description: Tianhe Oil Group,originally established in 1973, is a comprehensive

    enterprise of equipment manufacturing and oilfield service providing.

    We're specialized in innovating, manufacturing and sales of drill and

    petroleum extraction tools, equipments and oil field services.

    Tianhe Oil Group is a council member of CPEIA (China Petroleum and Equipment Industry Association), having been confered as a national Hi Tech company. Tianhe is a well known Chinese trademark. We've been certified in compliance with ISO, API, NS 1, and HSE management system,we have now high end machining centers like CNC turning centers from Mazak,all in one MILLTURN center from WFL Millturn Technologies GmbH&Co.KG as well as a wide range of other sophisticated tooling equipments.

    A strong domestic sales network has been established,covering all oilfields of CNPC, SINOPEC and CNOOC. Specifically today, we're exporting to 45 countries around the globe, overseas trading amount has topped over 80% of our business.

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