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.
Related products
GS (I) Type Casing Brusher is one of the indispensable auxiliary tools for well completion, testing and downhole operation. Its main purpose is to remove the residual attachments after the scraping operation of downhole casing inner wall scraper and protect the cleanness of casing inner wall, so as to facilitate the normal operation of all drilling tools. It is usually used with casing scraper.GS (I) Type Casing Brusher is not suitable for drilling operation.
GX-X Type Non-rotating Casing Scraper is one of the indispensable auxiliary tools for well completion, testing and downhole operation. The main purpose of the scraper is to remove cement, sand, residual bullets, scratches, paraffin, burrs and other attachments from the inner wall of the downhole casing, and protect the inner wall of the casing, so as to facilitate the normal operation of all drilling tools. Type B non rotating scraper is not suitable for drilling operation.
YTQC Type Drill String Fishing Magnet is one of the auxiliary tools to ensure the normal drilling operation and bottom hole cleaning in the process of downhole accident treatment. The main feature of this product is that it works together with the grinding shoes in the fishing operation, which is different from the previous method of lifting the drill after milling, and then connecting the drill string with the strong magnetic fishing tool to go down the well for cleaning bottom hole , saving a trip down the well operation, which not only saves the drilling cost, but also saves the fishing operation time.
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.
