All rotary BHA’s have a tendency to build and directional control is maintained by selecting a BHA which gives the desired build up rate (BUR). Due to the strong build tendency, it is preferable to err on the low side of vertical section as it is it will always be simpler to make a build … Guidelines for Rotary Directional Drilling

All mudmotors, non-magnetic drill collars, stabiliser mandrels and subs shall be inspected as per Company inspection programme. All tools supplied to the rig shall be accompanied by the appropriate documentation. All pin connections shall be stress-relieved and all boxes bored back. Bottom Hole Assembly In general, only the bit, drill collars, and stabilisers are taken … Directional BHA considerations

During the drilling operations phase the positional uncertainty must be monitored, especially when drilling in hole sections which exhibit collision risk. All borehole position calculations for well design, the survey database and well monitoring shall be performed with the Directional Drilling Contractor software. Anti-Collision Preferences Survey Tool Error System The system used in Company is … Positional Uncertainty

This article describes the surveying guidelines for wells with potential well control problems. Magnetic Single Shot / MWD In Exploration, Appraisal or Development well hole sections, where mobile hydrocarbons are present or potential well control problems could be encountered,  regularly spaced Magnetic Single Shot(MSS) (or MWD ) surveys shall be taken at a frequency not … Surveying Wells with Anticipated Well Control Problems

Tie-in data shall be provided by the Operations Engineer and sent to the rig for the Drilling Supervisor after completion of quality assurance check on each multi-shot MWD survey. The tie-in data will include: tie-in depth AHBDF (ft) inclination (degrees) azimuth (degrees) – referenced to UTM True Vertical Depth Below Derrick Floor (TVBDF) (ft) northing … Tie-In Data

This article describes the data to be includd in the various well plots. All plots, whether standard or non-standard shall include a: ‘Check/Signature’ box for the Operations Engineer and Petroleum Geology ‘Check/Signature’ box for the Senior Operations Engineer revision identifier indicated by a large character (A, B, C, etc.) supplemented by the date of the … Well Plots

The Drilling Programme shall be checked by the Drilling Supervisor to ensure that all the information necessary for the preparation and commencement of directional operations has been included. Where any necessary data has not been included, it shall be requested by the Drilling Supervisor prior to commencement of operations. Information to be Included in  the … Directional Drilling Planning

The following table lists the responsibilities for the implementation, execution, and quality control of directional drilling and surveying activities: Activity Execution Quality Control Specification of target Geology Asset Team Leader Preparation of well plan (including kick off point and surface location /jacket/slot) Directional Contractor Drilling Contractor Operations Engineer Operations Engineer Equipment selection Drilling Supervisor Operations … Directional Drilling Responsibilities