1. Summary The output from this analysis will become the basis of the functional specifications for a Drill String ITT. The drill string analysis focused on the three most critical sections as follows: the 12 ¼” section drilled vertically from 1900m to about 4550m MDBRT; the 8 ½” section drilled directionally from 4550m to 5140m … Drill Pipe String Design (example)
Hole cleaning is one of the basic functions of any drilling fluid. Cuttings generated by the bit, plus any caving and/or sloughing, must be carried to the surface by the mud. Failure to achieve effective hole cleaning can lead to serious problems, including stuck pipe, excessive torque and drag, annular pack-off, lost circulation, high mud … Hole Cleaning Tips
The information contained in this document is provided as guidelines and should be used in conjunction with the kick procedures flowcharts to deal with specific well control problems. These procedures basically apply to the hp section of an hp well, generally following the setting of the deep intermediate casing, (9.5/8″ – 10.3/4″). 1. INTRODUCTION The … HPHT Drilling Procedures
1.0 Reasons for Directional Surveys Surveys are taken to better define the position of the wellbore, generally relative to the surface location. The reasons for wanting this information include:a. Directional Control: To ensure the wellbore will reach its target.b. Well control: provide information for drilling relief wells.c. Reservoir development/exploitation: accurate description of the well’s position … Survey Programme
This empirical drilling software calculates the flow rate required for full cuttigns transport Download 753 – Hole Cleaning.xls
This article describes the keys elements for preparing a HPHT procedure An offshore Daily Meeting will be held between Company Drilling Supervisor, and service companies to review programme, procedure and safety aspects. The meeting will be conducted by the Company drilling supervisor. Prior to starting specific operations other than routine jobs (i.e. well control, .etc) … HPHT procedures
Drilling fluid volumes (active, reserve and kill mud) The minimum safety stock of mud available on surface prior to and whilst drilling any potential high pressure formation will be: Active mud 60m3 Reserve mud (same MW and properties active) 160m3 Kill/slug mud MW= 2.00 SG 15m3 Total minimum mud on surface 250 m3 Mud … Minimum safety stock for HPHT operations
The following survey tools and techniques are recommended/ available: Solid state magnetic survey tools Conventional magnetic survey tools Conventional gyroscopic survey tools North seeking gyro survey tools Inertial navigation survey systems Approval of tools Inclination-only tools are not regarded as survey tools but as inclination indicator tools. They can at best only be used to … Survey tools and techniques
The Drilling Engineer must ensure that the wellhead co-ordinates and the target co-ordinates are given in the same co-ordinate system (origin, azimuth depth reference). When storing the well proposal, the Drilling Engineer shall specify the horizontal and the vertical wellhead position uncertainty. Once entered, the position uncertainty numbers are defaults for future storage of that … Wellpath planning and anti-collision monitoring – COMPASS
The correction programme corrects the inclination and azimuth values for cross-axial and axial magnetic interference of the drillstring (including magnetic hot-spots in NMDCs), bias uncertainties of the accelerometers and magnetometers of the survey tool and toolface dependent misalignment. The method does not correct for external disturbing magnetic fields such as from nearby casings or magnetic … Correction programmes for magnetic survey