QJZ Mechanical Drilling Jar

QJZ type mechanical drilling jar is a kind of fully-mechanical jarring tools. It can release the drilling tools sticking accidents by providing a up and down jarring force. Basically, it is part of the drill stem, whenever needed, the jarring force can increase the working efficiency.


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Tianhe Downhole motor design d on the most advanced international design technology. We have a Closely cooperating with domestic, surgical research institutes, universities and oilfield drilling companies, and through careful research and development of R & D center in Canada, the design of technical parameters and structure can meet the most demanding oil drilling needs. Tianhe downhole motor is designed for durability and longer service life for different use conditions, with the most stringent specific tolerances for design and manufacturing standards.

The common drill pipe is a rod that connects the drill bit, delivers the drilling fluid and transmits the power in the drilling tool. Our common drill pipe conforms to SY/T5561 and API Spec5DP standards. In order to reduce the wear of the casing and drill pipe, we can weld the wear belt at the end of the drill pipe female buckle joint. Our company has obtained the production and use license of ARNCO 100XT, ARNCO 150XT, ARNCO 300XT and ARNCO 350XT authorized by the American Anke company.

The agitator can improve the effectiveness of bit weight transfer and reduce the friction between drilling tool and borehole through the longitudinal vibration produced by the hydraulic action of drilling fluid, especially in the process of directional drilling to improve the bit weight transfer and reduce torsional vibration. It is a downhole tool used to solve downhole depressurization and improve weight on bit transfer. Smooth weight on bit transfer improves the ability to adjust the bit toolface to reach further target zones. It does not require too much work to adjust the tool face during drilling, keeping the tool face stable and increasing ROP. Particularly suited for horizontal, extended-reach Wells, it can be used in conjunction with MWD, screw, and any bit.


Up Jarring Working Principle

It show us the jarring state unlocked after be adjusted when it comes to the jarring position the moving axis should snap in the inside threads of the slips. The outer thread of the slips and inside sleeve are under the friction state with. When lifting the drill stem, the upper sub, upper control sleeve, middle sleeve lower control sleeve, lower regularing sleeve, spring type inside sleeve, spring middle sleeve, and spring outer sleeve will move upward while friction sleeve keep still. The slips can be opened when its outer thread top touch the friction sleeve's teeth, at the moment the teeth of the axis will move out from the slips' inside teeth, Then stored power will release and give a up and down double-way force, the tool will return to the state the ready to jarring position. Repeat the following operation, we can release the sticking drillingtools.

Lower Jarring Working Principle

There are a set of spring sleeve on the top of the slips. When the stem give a pressure on the jar, it can pass through the upper sub, upper control sleeve, upper regularing sleeve to work on the, spring type inside sleeve, spring middle sleeve, and spring outer sleeve. Slips will move upwards while the friction sleeve keep still, until reach the predetermination position, the teeth top of the slips will touch the teeth of the friction sleeve, slips will open to let the moving axis release from the slips teeth, the down-way jarring force against the upper jarringforce.

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