1.material:low-carbon high-chromium alloy steel 2.low-permeability,excellent wear resistance. 3.API Spec7-1 Non-magnetic drill collar is the used of suchh a low-carbon high- chromium alloy steel of magnetic. Which is to undergo a rigorous analysis of the chemical composition by...

1.standard: API7-1 2.OD:79.4mm-279.4mm 3. factory directly delivery Spiral drill collar is the main products in Jiangsu HEXIN, such drill collar can provent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of...

1.standard: API7-1 2.OD:79.4mm-279.4mm 3. factory directly delivery Spiral drill collar is the main products in Jiangsu HEXIN, such drill collar can provent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of...

1.standard: API7-1 2.OD:79.4mm-279.4mm 3. factory directly delivery Spiral drill collar is the main products in Jiangsu HEXIN, such drill collar can provent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of...

1.standard: API7-1 2.OD:79.4mm-279.4mm 3. factory directly delivery Spiral drill collar is the main products in Jiangsu HEXIN, such drill collar can provent drilling process in the differential pressure block, the spiral groove will allow the mud around the drill collar of...

Heavy weight drill pipe is made of alloyed steel and manufactured strictly from API specification and SY/5146 standard. 1.Size: 3 1/2", 4",4 1/2", 5", 5 1/2",6 5/8"2.Products description:Our integral HWDP is made from one piece of AISI 4145H...