Hydraulic-Mechanical Drilling Jar JYQ

Product Detail

Hydraulic-Mechanical Drilling Jar JYQ

Technical Features

Model 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. It can adopt the new special material for higher property and safety. It can be used for directional hole, deep hole and so on.

Working principle

● Up jarring

Lowering drill string to make drilling jar closed completely (in locking position), elevating drill string by the order of small tonnage to larger tonnage, which make spring and hydraulic cylinder delay, when mandrel move to a position and become release resistance, the spring force stored in drill string will transfer to upforward energy and up jarring. Repeating the above several times can force tool to produce continues up jarring.

● Down jarring

Move up and down the drill string to make drilling jar closed completely (in locking position), lowering drill string to make spring compressed and stored energy. When pressure of jar is larger than the desired lower unlocking force, grapple will slide out from mandrel to release the locking and make down jarring. Repeating the above several times can force tool to produce continues down jarring.

 

 

 

 

 

 

 

 

 

 

 

Technical Parameters

Model	O.D mm/in	I.D mm/in	Connection API	Max.Upward jarring force kN/lbf	Max.Downward jarring force kN/lbf f	Max.Working load kN/lbf	Tensie Yield strength kN/lb	Max.Working Torque kN·m/lbf·f	Overall Length Mm/in
JYQ121	121 4-3/4	57.2 2-1/4	NC38	350 78000	250 56000	900 200000	1350 300000	15 11000	4500 117.17
JYQ165	165 6-1/2	702-3/4	NC50	800 180000	400 90000	2400 540000	3200 720000	30 22000	5256 206.93
JYQ203	229 9	76.2 3	6 5/8REG	1000 225000	450 100000	2800 630000	5200 1170000	35 25800	5095 200.6
JYQ241	241 9-1/2	76.2 3	7 5/8REG	1400 315000	500 112000	3500 780000	9500 2100000	40 30000	5300 200.6

Above list some models, other models also can be supplied as follows:JQY159(6-1/4” ),JQY178(7”),JYQ197(8),JQY203(9”)