DescriptionModel JYQ Drilling Jar can integrate the mechanical and hydraulic. The up jarring can be acted by hydraulic as to realize the stepless control of up jarring tonnage. The lock mechanism designed specially can avoid the mistaken jarring of up. The down jarring can be acted mechanically. I...

DescriptionModel “YJHM” Drilling Jar belongs to the advanced product of model JYQ Jar. The up jarring can be acted by hydraulic as to realize the stepless tonnage control. The new hydraulic valve machine makes up-jarring more stable and reliable. The down jarring can be acted mechanically. And the...

DescriptionModel ZS(X)J Drilling Jar adopts split structure to realize up-down jarring operation independently. The Top Jar should be acted by hydraulic as to realize the stepless tonnage control；the Down Jar should be acted by mechanical for reliable jarring; It should be used for directional hol...

DescriptionModel “JSZ” Drilling Jar can be actuated by mechanical fully. The inner chamber cannot produce high-pressure. The change of oiliness cannot impact jarring effect. The short overall length can reduce the harm of bending alternating stress, facilitating the conveyance. It has the low seal...

DescriptionThe up-down jarring tonnage can be adjusted for a large range. The Drilling Jar can be actuated by mechanical fully. The inner chamber cannot produce high-pressure. The change of oiliness cannot impact jarring effect. The low sealing property can make the using life improve observably. ...