Drilling Equipments

Oil Production Equipments

Other Service Tools

Surface Jar, Drilling jar

The surface jar is an effective tool for resolving the problem of stuck drill tool 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 that 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 an safe, successfully effective releasing tool through many years' application.
Make-up Torque Unit: KN.m
 
Model Connections for External Bowl. Between Top Sub and Central Pipe Between Central Pipe and Slip Mandrel Between Tailpipe and Lower Sub
DJ46 8 5 5 2.5±0.25
DJ70 39 12.7 6.4±0.49 3.9±0.39

 Technical Specifications and Parameters：

Drilling Jar

The ZSJ /ZXJ type full mechanical drilling jar, interchangeable with Bowen type, is connected with drill tool and worked with drill string, and is a downhole stuck freeing tool in drilling operation. It is a first selected tool for directional well, complicated well and deep well.
The drilling jar is consisting of ZSJ type drilling up jar and ZXJ type drilling down jar. Both of which can be used mutually or operated separately. 
 
Technical Specifications and Parameters：