A barite plug is a slurry of barite in fresh water or diesel oil which is spotted in the hole to form a barite bridge that will seal the flow and allow control of the well to be re-established. The plug is displaced through the drillstring and, if conditions allow, the string is pulled up … Barite Plugs
This article highlights the guidelines which shall be followed during tripping and drilling in order to avoid taking kicks. During any open hole operation the mud level in the well shall always be full. Prevention While Drilling The following guidelines shall be observed during drilling: Warning signs that a kick has occurred while drilling … Influx Prevention
The Maximum Allowable Annular Surface Pressure (MAASP) equals the formation breakdown pressure at the point under consideration minus the hydrostatic head of the mud/or influx in the casing. During well control operations the critical point to consider is the casing shoe. MAASP = Formation BreakDown Pressure – Head of mud in use or MAASP = … Calculation of Maximum Allowable Annular Surface Pressure (MAASP)
Three types of drills are to be exercised, one while drilling with the kelly on the string, one normally while tripping without the kelly on the string and one with the bit off bottom ie.: Kick Drill While Drilling (pit drill) Kick Drill While Tripping (trip drill) Kick Drill While Bit Off Bottom (strip drill). … Well Control Drills and Exercises
This article describes the planning issues to be addressed to ensure successful well control. Kick Control Work-Sheet A kick control worksheet shall be used to pre-record the data required for secondary control and shall be kept updated while maintaining primary control. The frequency of updating shall be determined by rate of change of parameters involved … Pre-Kick Planning
Kick detection and well monitoring equipment shall be supplied and maintained in full compliance with the specifications detailed in the relevant contracts between the Company and the Drilling Contractor.
A wireline pressure control assembly must be capable of shutting in on the size of wire being run, have a working pressure rating which exceeds the anticipated maximum well pressure and also allow the well to be circulated. The pressure rating of each component in the assembly must be checked to ensure safety factors are … Wireline Pressure Control Equipment
Components for shutting in the drillpipe internally are a basic part of well control equipment. All drill string BOP valves must have a pressure rating equal to, or greater than, the BOP stack. The following drill string BOP valves shall be available on the drill floor at all times: A full bore Kelly Cock shall … Drill String BOP Valves
The choke and kill system shall provide the valves and piping required to allow controlled circulation of the well under pressure. The choke and kill system shall include: 2 each kill and choke lines valves Lines connecting the BOP stack to the choke and kill manifold A choke manifold. A flare line connected to the … Choke and Kill System
A Blow Out Prevention (BOP) stack is installed on a wellhead to control the removal of an influx from the wellbore. All pressure contained components of the BOP stack and related equipment shall be constructed of material which meets the standards of NACE MR-01-75 and API RP-53. BOP stack configuration should ensure that the following … General BOP Arrangement