NOV Grant Prideco drill-string guidance & reference data (from the Grant Prideco 钻具技术手册, excerpted from API Spec 7 / API RP 7G): make-up torque practice (incl. the 80% drilling-torque rule), handling/grip distance, care & handling, sour service; double-shoulder connection families HT/XT/XT-M/GPDS with recommended make-up torque & thread forms; drill-pipe steel grades & API tool joints; heavy-weight drill pipe (3 types + dimensional data); drill collars (material, bending-strength-ratio, weight, connection selection, ideal size by hole); rotary-shouldered connection interchangeability; kelly (square/hex weights & connections); crossover/service subs; well control (kill/pressure formulas, pump output, capacity & displacement, buoyancy factor); and imperial-to-SI unit conversions. ALSO includes reference_tables: the manual's dense spec/torque/weight/capacity/inspection matrices and BSR charts as reference IMAGE URLs (including the wide cross-page drill-collar make-up-torque & weight tables assembled whole from the facing-page scan) — for exact cell values, return the matching image_url to the user instead of transcribing the numbers. Call without a topic to get everything, or pass one topic.
