The Mud Cap Drilling (MPD, Managed Pressure Drilling) is a technique that can be used even in case of total circulation losses. Circulation losses are traditionally cured with Loss Circulation Materials (LCMs) pills, gunk pills and cement plugs, but these methods have disadvantages: uncertain about results time consuming and expensive, potential damage to reservoirs. Severe … Planning requirements for Managed Pressure Drilling (Mud Cap)

Responsibilities for preparation, approval and content of the drilling programme. Drilling Programmes are the approved instructions for carrying out activities and tasks which are required to achieve the objectives of the drilling process. Before commencing drilling operations, an approved signed copy of the Drilling Programme must be available on the rig site. Responsibilities The Drilling … Drilling Programme – Preparation and Content

This article describes  the various ways of transmitting mechanical power to the bit by rotation. There must be sufficient HHP at the bit to keep the cutters or diamonds clean, and that an increase in mechanical power, applied to the bit with minimum vibration, will increase penetration rate. Mechanical power is the product of torque … Mechanical power to the bit / corehead

Main acronyms/ abbreviations used in the oil industry A AH                  Along hole API                  American Petroleum Institute B bbl(s)              Barrel(s) bbls/min         Barrels per minute BDF                Below drill floor BHA                Bottom hole assembly BHS                Bottom hole sample BOP                Blow-out preventer bopd              Barrels of oil per day BPM                Back pressure manifold bpm                Barrels per minute (also bbls/min) BS&W             … Acronyms and Abbeviations

1. introduction The purpose of this outline program is to set the framework for the operations. This programme will prepare the existing well, for a forthcoming near horizontal multilateral side-track which is due to begin immediately upon the successful completion of the abandonment. The existing completion will be retrieved from the wellhead down to the … Multilateral drilling programme

Wells may require sidetracking in order to re-drill the well to a new target, sidetrack past a fish or sidetrack due to hole problems. The main requirements in sidetracking a well is the development of a lateral force to allow the bit to cut on the side of the hole. This lateral force should be … Sidetracking Guidelines

This article describes the basic Drilling Standards. The Drilling Department shall deliver a ‘fit for purpose’ wellbore, the criteria of which are: attainment of the required bottom hole position meet the planned trajectory without excessive dogleg security penetrate the reservoir without formation impairment provide hole conditions that allow attainment of high quality logs, RFT data, … Drilling Standards

Responsibilities during drilling operations (drilling supervisor, drilling contractor, toolpusher, driller, drilling superintendent). Drilling Supervisor The Drilling Supervisor shall provide prior to any particular operation written instructions to the Drilling Contractor Toolpusher and service personnel. These instructions shall include but are not limited to: general sequence of programme events potential hazards contingency procedures in the event … Responsibilities during drilling operations

Responsibilities (Planning, Supervision and Verification) during abandoment: Drilling Engineer The Drilling Engineer shall be responsible for preparing the Suspension or Abandonment Programme and for ensuring that: the final well status meets the statutory requirements regarding zonal isolation primary well control is in place and shall not deteriorate with time economical use is made of rig … Responsibilities for Abandonment

This article describes the various depth references used for drilling onshore and offshore wells: Reference Datum, Chart Datum (CD), Mean Sea Level (MSL), High Tide (HT), Low Tide (LT), Water Level (WL), Lowest Astronomical Tide (LAT), Depth Subsea (SS)          Reference Datum For operations involving a rig, either onshore or offshore, all depths (either along hole … Depth Referencing