Course overview
Sidetracking & Re-Entry Drilling Operation out of an existing wellbore is another application of directional drilling . This is done to bypass an obstruction (“fish”) in the original wellbore, to explore the extent of a producing zone in a certain sector of a field, or to sidetrack a dry hole to a more promising target. Wells are also sidetracked to access more reservoir by drilling a horizontal hole section from the existing well bore. This technique requiring a combination of drilling & workover operation, starting from preparing present well for drilling operations as: killing present well, pulling existing completion string, running casing log for casing integrity, plug and abundant present pay zone and opening window in present casing either by several techniques such as whip-stock, milling window in casing, milling liner hanger & liner over lap plus enough open hole then side track.
Course content
- Introduction of Side Tracking and Re – Entry Drilling Preliminary test
- Reasons of side tracks or well re-tracking
- Fishing and milling tools
- Workover hazards management
- Side tracks Techniques
- Balanced side track cement plug procedure and Calculation
- Side tracking well procedures (for open hole)
- Preparing well for side tracking (for cased hole)
- Killing well methods.
- Cement squeeze types, sequences and calculations.
- Cement bond logs and choice of side tracking area.
- Opening casing window by milling (sectional mill).
- P&A well with balanced cement plug.
- Side tracking tools and technique.
- Whip-stock and back-stock types.
- Setting procedures for back stocks.
- Side tracking using back stocks.
- Re-entry using milling liners technique
- Re-entry and multi lateral wells.
- Side tracking plan
- Hole cleaning
- Side tracing fluid and Hydraulics.
- Completion of side tracked wells.
- Avoiding accidental side tracks.
- Learn the techniques to enhance of oil or gas recovery via side track & re-entry
- Gain knowledge of how to build economical targets in company projects
- Increase the oil fields productivity
- Solve the workover hazards
- Learn the techniques of killing NPT and improving KPI during the operation
Course Features
- Lectures 0
- Quizzes 0
- Duration 50 hours
- Skill level All levels
- Language English
- Students 9
- Assessments Yes
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