The results will be entered on the drilling log. At least two centralizers shall be run on surface casing. The minimum spacing requirement is one per one hundred-twenty feet. Cement baskets shall be installed appropriately above major lost circulation zones. Prior to cementing any casing strings, all gas flows shall be killed and the operator shall attempt to establish circulation by pumping the calculated volume necessary to circulate.
Circulation is deemed to have been established once fluid reaches the surface.
A flush, spacer or extra cement shall be used to separate the cement from the bore hole spacer or extra cement shall be used to separate the cement from the bore hole fluids to prevent dilution. If cement returns are not present at the surface, the operator may be required to run a log to determine the top of the cement. The pump and plug method shall be used to cement surface casing. The operator shall test or require the cementing contractor to test the mixing water for ph and temperature prior to mixing the cement and to record the results on the cementing ticket. The cement slurry shall be prepared according to the manufacturer's or contractor's specifications to minimize free water content in the cement.