If well kicks while tripping and the well is shut in, wait for instructions from the Drilling Superintendent. All equipment shall be arranged to implement the stripping operation. This means that: it shall be possible to accurately measure any mud volume released from the well accurate pressure gauges should be available pressure regulators on blow … Well Kill Using Combined Volumetric Stripping
Well control precautions to be used when running casing. Change the rams to the casing size (on surface stack) and test the BOP bonnets. Prepare a circulating head. Ensure a cross-over from casing to drill pipe is available to allow the string to be hung off if needed. Take care while filling up the casing. … Kicks with Casing in the BOP Stack
The detection of a kick when the drill collars are in the BOP stack is a time of concern for the safety of the crew and the drilling unit as the normal methods of secondary control using the BOP’s may fail. A kick of this nature can occur when the drill siring is being pulled … Kicks with Drill Collars in the BOP Stack
Conventional well killing procedures are based upon the basis that all of the well control equipment operates as designed and the wellbore is able to withstand the imposed pressures. Mechanical problems and formation fracturing, however, occur occasionally during well killing operations causing complications with conventional procedures. Stopping the Killing Operation Killing operations may have to … Problems Encountered During Well Control
To detect a kick while the string is out of hole it is essential that drilling fluid is circulated across the well and trip tank at all times. Automatic alarms should be set to provide early audible/visual warning of an increase/decrease in the trip tank level. Should it be necessary to close the Blind/Shear Rams, … Well Control Procedure – While Out of Hole
To detect a kick while round tripping as early as possible, it shall be standard practice to use the trip tank at all times while tripping both into and out of the hole. The Driller shall be responsible for monitoring the trip tank volume at regular intervals to ensure that the hole is either taking … Well Control Procedure – While Tripping
Should an influx be detected while on bottom, the following procedure shall used: 1. RECOGNISE the kick and ALERT the crew. 2. STOP rotary table. 3. PULL BACK kelly until kelly cock is above rotary table. 4. STOP pump. 5. CLOSE ram type preventer. 6. Inform Toolpusher and Company Man. 7. OPEN hydraulic operated valve … Well Control Procedure – While on Bottom
If an overbalance existed prior to pulling out of hole, then the only reasons for the well to flow are:·swabbing;·failure to keep the hole full;·losses induced by surge pressures. Early detection of kicks off bottom can be achieved by observing whether the hole is taking the proper amount of fluid during roundtrips. This can be … Well Control – Kick whilst tripping
Complications during well control operations Stopping the control operation, Plugged chokes, Change in circulating kill rate, Plugged bit nozzles, Kick caused by loss of circulation below production zone, Complete power failure during the controlling operation 1 Stopping the control operation Control operations may have to be stopped because of equipment failure or for checking static … Complications during well control operations
A non standard well control method is to attempt to bring the well under control by circulating heavy mud to overbalance the surface pressures. The theory behind this method is that the well can then be opened and the string run deeper. This method is not reliable since there is no proper control of bottom … Well Control – Circulating heavy mud (bit off bottom)