KXJ type bumper jar (hereinafter called as bumper jar )is a mechanical jarring tool. It can make jar repeatedly the stuck drill stem to free from stuck point. When stuck drill stem can not be released by lifting and jarring, the bumper jar can be rotated to make releasable fishing tool to release fish. When used with mechanical internal cutter, it can provide an expected feeding force to the internal cutter so as to cutting steadily. When used with reversing unit, it can compensate the rising stroke for threads afterreversing.

YSJ type hydraulic up jar is used to be free from drilling sticking, through hydraulic principle, by means of elastic potential produced from drill tool elastic deformation. Once the elastic potential energy is released, it would produce a large up striking load to reach a purpose of fishing and coring. It features easy structures, strong jarring force,easy to return, convenient operation. If it is used with ZJS type jar intensifier, it may gain better jarring effect.

Lubricated fishing bumper sub is one of the jars which produce jarring force by means of the energy caused by heavy weight objects when moving down, its inner chamber is full of hydraulic oil so as to ensure a longer service life. The tool is suitable for deep hole and middle deep hole operation. With some advantages: Can produce strong one way down jarring force, maximum jarring force, continuous down jarring force. Medium jarring force; continuous up jar, low-grade jarring force; can release fishing tool; can act as constant pressure drill tool, simply structure, easy operation, all these make it widely used jarring tool.

The surface jar is an effective tool for resolving the problem of drill tool stuck in down hole. It is connected with the surface section of drill string, the device to adjust the tonnage shall protrude from the rotary disc face, the violent down jarring to the stuck catch can be clearly seen when the surface jar makes jarring operation. The jarring strength for the tool can be easily adjusted and it is an easy operated, unique designed tool which can make continuous down jarring. The surface jar, which not only can bear heavy load and strong torque but also owns a good sealing property and can withstand the mud circulation with high pump pressure, has proven to be a safe, successfully effective releasing tool through many years using.

TIANHE Series 150 Releasing and Circulating Overshot is an external fishing tool for engage, pack off and retrieve tubular fish, especially for fishing drill collar and drill pipe. The grapple of the overshot can be designed for different sizes of fish, so one overshot can be dressed with different size of grapple components for fishing different sizes of fish. 

TIANHE Series 10 Sucker Rod Overshot is a professional fishing tool, designed for engaging and retrieving sucker rods, couplings, and other tubular from inside tubing strings.