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E-461 - Nitrogen & Coiled Tubing Operations in Completion & Workover

5 days PRO/CTAE
Level
Proficiency
Audience
  • Engineers, supervisors, technicians from operating or service companies, involved in completion, workover and stimulation
Purpose
  • To provide a comprehensive, practical knowledge of coiled tubing equipment and operations on a producing well
Learning Objectives
  • To learn about coiled tubing applications in completion and workover
  • To design coiled tubing programs (wellbore treatment, logging, cementing, lifting and drilling)
Ways and means
  • Exercises - Animations

Introduction to coiled tubing 0.25 day
  • Coiled tubing history, business today, CT evolution along years
Pipe characteristics and behavior 0.5 day
  • Geometric and mechanical properties: geometry, metallurgy, performance, characteristic curve
  • Tubing behavior (at surface, in hole): fatigue, buckling, tension and pressure limits (tubing force analysis, model for operation design)
  • Measuring and recording of operating parameters
Coiled tubing equipment (technology, dimension, weight) 1.25 days
  • Main components: reel, injector, BOP, and related equipment
  • Auxiliary equipment: crane, pumping equipment, etc.
  • Down hole tools: connectors, safety equipment, circulating tools, down hole motor, fishing tools, inflatable packers, etc.
  • Guide for safe equipment rig-up
Pipe characteristics and behavior 0.5 day
  • Geometric and mechanical properties: geometry, metallurgy, performance, characteristic curve
  • Tubing behavior (at surface, in hole): fatigue, buckling, tension and pressure limits (tubing force analysis, model for operation design)
  • Measuring and recording of operating parameters
Coiled tubing applications 1.75 days
  • Kick off with nitrogen, underbalance perforating
  • Well clean out (fill removal, wax and hydrate removal)
  • Sand control
  • Matrix treatment: acid, solvent
  • Other applications: CT assisted DST, conveyed tool operations in high deviated well, use as producing, gas-lift or chemical injection string, fishing, underreaming, drilling
  • Statistics, economy, areas for future development
Cementing operations with nitrogen or coiled tubing 0.25 day
  • Foamed cement: definition, use (primary cementing, squeeze)
  • Cementing through coiled tubing: cement plug, squeeze (squeeze slurry characteristics, job design, key-points)
Nitrogen - Nitrified acid - Foamed acid 1 day
  • Nitrogen (properties, basic formula for design)
  • Specifications for nitrogen storage and pumping equipment
  • Two-phase fluids and foams (properties, chart and tables for design, difference between foam and two phase fluids), diverting effect of foamed fluid
  • Stimulation methodology, flow back procedure