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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.
Mechanical drilling jar is a jarring and stuck releasing tool. It integrates the up jar and down jar and can release the stuck accident to occurring during drilling operation. For directional wells and deep wells drilling, the mechanical drilling jars are an ideal tool for improving work efficiency. Mechanical drilling jar integrates upward jarring with downward jarring so that it can release drilling tools from the block or the stuck etc. during drilling. It is a part of drill stem when it doesn't jarring and it can work at any time when need jarring, thus it is highly improve the drilling efficiency, it has widely load (jarring force) scope of upward jarring and download jarring, so it can be adjusted at the maintenance station or on the well site according to the requirement. The special flexible joint can effectively reduce the flexural stress of the drilling jar body. Therefore, it is the first selected drilling jar for vertical well, deep well, directional well and complicated well operations.
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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Main Product:
BOP,
Drilling Rig,
Drilling Tools,
Wellhead Equipments,
Wellhead Tools ,
Mud Pump
