ULTRA-LOW FRICTION COATINGS FOR DRILL STEM ASSEMBLIES
摘要
<p>Provided are drill stem assemblies with ultra-low friction coatings for subterraneous drilling operations. In one form, the coated drill stem assemblies for subterraneous rotary drilling operations include a body assembly with an exposed outer surface including a drill string coupled to a bottom hole assembly or a coiled tubing coupled to a bottom hole assembly and an ultra-low friction coating on at least a portion of the exposed outer surface of the body assembly, wherein the coefficient of friction of the ultra-low friction coating is less than or equal to 0.15. The coated drill stem assemblies disclosed herein provide for reduced friction, vibration (stick-slip and torsional), abrasion and wear during straight hole or directional drilling to allow for improved rates of penetration and enable ultra-extended reach drilling with existing top drives.</p>
申请公布号
CA2734715(C)
申请公布日期
2015.11.03
申请号
CA20092734715
申请日期
2009.08.20
申请人
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
发明人
OZEKCIN, ADNAN;JIN, HYUNWOO;BIEDIGER, ERIKA, A. OOTEN;BAILEY, JEFFREY, R.;GUPTA, VISHWAS;ERTAS, MEHMET DENIZ;ELKS, WILLIAM, C.;BANGARU, NARASIMHA-RAO