Downhole Tools

Downhole Fishing Jar for Stuck Drill Strings

> Designed and manufactured according to 7-1.

> Tool is anti-torque and can work with motor.

> Tool length is short, small diameter, less wear in the downhole.

> The same tool can change the components and the direction of the outer cylinder to realize up or down jar.

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Brief Introduction

Technical Specification

Diagram

Hydraulic jar (up / down) designed to use accelerator and flow sub form a coiled tubing short heavy string. The Jar delay device let the energy stored in the stretched and elongated string accelerator, when the energy released will have a great impact, generating shock effect, loose card tool stuck.

Type	O.D. (mm/inch)	I.D. (mm/inch)	Connection	Max. Upward Jarring Force KN	Max. Downward Jarring Force KN	OAL (mm/inch)
BZ121	121(4-3/4)	50.8(2)	NC38	450	230	6356(250)
BZ159	159(6-1/4)	57.2(2-1/4)	NC50	630	360	7265(286)
BZ165	165(6-1/2)	57.2(2-1/4)	NC50	630	360	7265(286)
BZ196	196(7-3/4)	71.4(2-13/16)	6-5/8REG	820	460	7062(287)
BZ203	203(8)	71.4(2-13/16)	6-5/8REG	820	460	7062(287)