Perforating Gun

Perforating Gun

Perforation is an extremely important technique in petroleum exploration and recovery engineering, a major means of enhancing the recovery factor of gas and oil wells and also a typical method of tapping the potential of existing oil fields and increasing output. Perforation completion is widely used in China and abroad and accounts for about over 90%of all well completions. Almost all reservoir beds can be opened by this method. In the method  in the course of gas and oil field exploitation the production casing is lowered and cemented  and then special perforation instrument and devices are sent down to the predetermined depth and aimed at the target layer. The perforator down in the well is ignited from ground and the  the lined cavity charge is ignited which result in the detonation wave  to transmit forward at a velocity of 7~8 kmper second and high temperature and high pressure shock waves are generated which penetrate though the casing, cement sheath and enter the stratum forming a hole canal, as illustrated by the diagram. Whichever perforation method you use, the performance and quality of the perforating gun( Including the perforating gun pipe) shall have a significant influence on the perforation quality of gas and oil wells.

Through Tubing Perforator（TTP）
Description
The through-tubing swing jet perforator is designed to perforate in WCP. It can convey big charges through tubing to producing formation. Then the releasing detonator is detonated by an electric current to unlock the trigger, and charges swing out to be normal to axis of guns. In this case the formation could be perforated with big charges.

Benefits / Capabilities
Can re-perforate in old well without pulling the tubing out.
Can be used with big charges to achieve deeper penetration.
Firing circuitry is in short before the charges are released.

Specifications