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Wellcap® IADC WELL CONTROL ACCREDITATION PROGRAM WELL SERVICING OPERATIONS – SNUBBING CORE CURRICULUM and RELATED JOB SKILLS

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Wellcap® IADC WELL CONTROL ACCREDITATION PROGRAM WELL SERVICING OPERATIONS – SNUBBING CORE CURRICULUM and RELATED JOB SKILLS WellCAP® IADC WELL CONTROL ACCREDITATION PROGRAM WELL SERVICING OPERATIONS – SNUBBING CORE CURRICULUM AND RELATED JOB SKILLS FORM WCT-2SS SUPERVISORY LEVEL The purpose of the core curriculum is to identify a body of knowledge and a set of job skills that can be used to provide well control skills for well servicing operations. The curriculum is divided into three certification types: Coiled Tubing, Snubbing, and Wireline (Wireline is presented in document WCT – 2WSW) and within each certification, three levels: Introductory, Fundamental, and Supervisory. Students may complete an individual certification (e.g., Coiled Tubing) or combination certifications (e.g., Coiled Tubing and Snubbing). All knowledge and skills for each individual certification must be addressed when combining certifications. The suggested target students for each core curriculum level are as follows: INTRODUCTORY: New Hires (May also be appropriate for non-technical personnel) FUNDAMENTAL: Helpers, Assistants, “Hands” involved with the operational aspects of the unit and who may act/operate the unit under direct supervision of a certified Unit Operator or Supervisor. SUPERVISORY: Unit Operators, Supervisors, Superintendents, and Project Foreman Upon completion of a well control training course based on curriculum guidelines, the student should be able to perform the job skills in italics identified by a "!" mark (e.g., ! Identify causes of kicks). Form WCT-2SS WellCAP Curriculum Guidelines – Well Servicing - Snubbing Revision 040416 Supervisory Page 1 CORE CURRICULUM & JOB SKILLS – TABLE OF CONTENTS TABLE OF CONTENTS I. REASONS FOR WELL SNUBBING OPERATIONS ...................................................................................................................... 6 A. Definitions of well-servicing operations......................................................................................................................................... 6 B. Definition of snubbing operations .................................................................................................................................................. 6 C. Reasons for snubbing operations which may include:.................................................................................................................... 6 II. DEFINITIONS AND CALCULATIONS .......................................................................................................................................... 7 A. Pressure fundamentals .................................................................................................................................................................... 7 B. Live wells and kicking wells........................................................................................................................................................... 8 C. Volumes/Capacities/Displacements................................................................................................................................................ 8 D. Force ............................................................................................................................................................................................... 9 III. KICK FUNDAMENTALS ............................................................................................................................................................... 10 A. Definition of a kick ....................................................................................................................................................................... 10 B. Causes of kicks ............................................................................................................................................................................. 10 C. Kick detection............................................................................................................................................................................... 10 D. Importance of responding to kick indicators in a timely manner ................................................................................................. 11 IV. GAS CHARACTERISTICS AND BEHAVIOR.............................................................................................................................. 12 A. Pressure, volume, relationship (Boyles Law) ............................................................................................................................... 12 B. Gas expansion and migration relationships .................................................................................................................................. 12 C. Solubility of gases......................................................................................................................................................................... 12 V. DRILLING, COMPLETION AND WORKOVER FLUIDS ........................................................................................................... 13 A. Primary function is pressure control............................................................................................................................................. 13 B. Characteristics of circulated fluids................................................................................................................................................ 13 C. Fluid types..................................................................................................................................................................................... 13 D. Pressure losses and causes ............................................................................................................................................................ 14 E. Fluid density concerns and measuring techniques........................................................................................................................ 14 VI. EQUIPMENT VIa. GENERAL SURFACE EQUIPMENT............................................................................................................ 15 A. Production (Christmas or Xmas) tree ........................................................................................................................................... 15 Page 2 CORE CURRICULUM & JOB SKILLS – TABLE OF CONTENTS B. Rig blowout preventer stacks........................................................................................................................................................ 15 C. Auxiliary well control equipment ................................................................................................................................................. 16 D. Accumulators ................................................................................................................................................................................ 16 E. Chokes and choke manifolds ........................................................................................................................................................ 16 F. Fluid measuring devices ............................................................................................................................................................... 17 G. Gas detection and handling systems ............................................................................................................................................. 17 H. Lubricator/Stripper assemblies ..................................................................................................................................................... 17 I. Accumulators ................................................................................................................................................................................ 18 VIb. SNUBBING EQUIPMENT...................................................................................................................................................... 19 A. Snubbing equipment..................................................................................................................................................................... 19 B. Lubricator/Stripper assemblies ..................................................................................................................................................... 20 C. Blowout preventer stack ............................................................................................................................................................... 20 D. Auxiliary well control equipment ................................................................................................................................................. 21 E. Accumulators ................................................................................................................................................................................ 21 VII. SUBSURFACE EQUIPMENT......................................................................................................................................................... 22 A. Workstring and production tubing................................................................................................................................................ 22 B. Completion equipment.................................................................................................................................................................. 22 VIII. PROCEDURES................................................................................................................................................................................
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