API 6A Dosenkopf Spool

Bottom is connect with Casing Head , which is applicable for hanging the casing string, sealing and controlling the annular space between the casing string. 1. Both top and bottom connections are API 6A flanged, and the top flanges are provided with locking bolts; 2. Secondary seal mechanism(“O” seal, grease injection BT seal or metal-metal seal) are set at the bottom of casing head and casing spool; 3. Casing hanger for casing head has straight type seat bore and 45°cone of hanging shoulder, with strong loading ability; 4. Structural type of the matched casing hanger: slip or mandrel(thread); 5. Side outlet connection is bolted flange. (Specifications for Conventional dual-layer and Integral Casing head) Connected casing(O/D)inHanger casing(O/D)inWorking pressurePsiSide outlet studVertical boremmBottom hangerTop hanger13 3/89 5/872,0003,0005,00010,00015,00020,0001 13/162 1/162 9/163 1/16(Top)230(Bottom)3185 1/257 5/85 1/2(Top)178(Bottom)318575 1/2(Top)164(Bottom)3185 Specifications for triple-layer Casing head Connected casing(O/D)inHanger casing(O/D)Working pressure PsiVertical boreTop×Mid×BottommmBottom hangerMid hangerTop hanger13 3/89 5/8752,0003,0005,00010,00015,00020,000164×230×3181613 3/875164×318×3909 5/85 1/2230×318×39072075164×318×4869 5/85 1/2230×318×4867