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

This article describes the the QA/QC tests for Measurement While Drilling (MWD). 1. Surface Function Test The MWD tool shall be function tested at surface according to contractor procedures. Two tools should be prepared to ensure a back-up is ready in case the surface circulating test fails. Make-up and Alignment of Measurement While Drilling (MWD) … Measurement While Drilling (MWD) – QA/QC

This article describes the general handling and running guidelines for Measurement While Drilling (MWD)   Handling Guidelines for Measurement While Drilling (MWD) tools Considerable care should be taken whenever handling MWD tools. They are built to withstand high axial loads but are easily damaged by transverse loading. MWD collars should always be snubbed when being … Measurement While Drilling (MWD) General Guidelines

The difference between the current Magnetic North for the location and Grid North is monitored for every survey by the Deviation Contractor and the Operations Engineer. All drilling plots and directional programmes shall contain the current approved value for correction. All surveys shall have azimuths pre-corrected to UTM.  

Electronic Magnetic Multi-Shots (EMMS) are a definitive multi-shot surveying instruments. However, MWD data may be accepted as the definitive survey provided QA/QC results are within the acceptable criteria. They have the advantage of being relatively insensitive to compass spacing, less mechanical parts, more options for time setting and quality control outputs. Running Guidelines During Electronic … Electronic Magnetic Multi-Shots

The Magnetic Multi-Shot survey (MMS) differs from the Magnetic Single-Shot survey (MSS) in that the camera contains a continuous film roll, which is exposed and advanced at pre-set time intervals. The time interval is set such that at least two pictures are taken while the pipe is stationary in the slips, thus providing a complete … Magnetic Multi-Shots

The Magnetic Single Shot survey (MSS) is an accurate field-proven instrument measuring inclination and magnetic azimuth, which consists of an electronic timer, camera and combined compass / inclinometer. The instrument is run in the same way as the TOTCO. When the timer fires, a film disc is exposed to the angle unit, thus recording the … Magnetic Single Shots

Gyro Multi-Shots (GMS) shall only be run in preference to EMMS to verify the surveys used to drill a hole section where magnetic interference may not be corrected. Gyro Multi-Shots are also used for ‘tying-in’ MWD surveys. They are also used inside a driven conductor (where a Gyro Multi-Shots is required for tying-in shoe co-ordinates … Gyro Multi-Shots

The Gyro Single Shot is used for orienting purposes only. While drilling, Gyro Single Shot surveys shall be taken instead of magnetic surveys or  MWD whenever magnetic interference may be present. Gyro Single Shot are also used for ‘tying-in’ MWD surveys. Interference is likely to happen within 50 ft of steel fish or casing strings … Gyro Single Shots