Types of Perforation Systems Three perforation systems which are used in oil and gas industry are casing guns, tubing conveyed guns and through tubing guns. Casing Gun System (Wireline Convey) The...
Vigor's Unlimited-Circulation Bypass Valve (UCBV) realizes the unlimited "on" and "off" of the underground bypass by one-time pitching and flow rate control at the wellhead, to realize multiple co...