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<br />3.12.5. Cementing <br />The intermediate casing shall be cemented by the circulation method with sufficient cement volume <br />to theoretically reach to at least 25 metres above the casing seat of the previous casing string. <br />3.12.6. Cement Volume <br />Cement volume shall be based on caliper volume if available or theoretical annular hole volume <br />plus the volume of the shoe joint plus: <br />(a) 30% excess cement if cement volume is based on theoretical calculation; or <br />(b) 20% excess up to the designed cement top if cement volume is based on a caliper volume. <br />3.12.7. Cement Quality <br />Intermediate casing cement shall be sulphate-resistant if sulphur water zones have been <br />penetrated in the intermediate hole. (Refer to API Specification 10: Class of Cement and the mill <br />grind analysis of cement to confirm sulphate-resistance of cement). <br />3.12.8. Cementing -Shoe Joint <br />A shoe joint with a minimum length of five metres shall be run to retain contaminated tail cement. <br />3.12.9. Wait on Cement (WOC) <br />Cement samples shall be collected during the start, middle and end of the cementing operation an <br />the operator shall observe the set-up time, curing time, and compressive strengths of the cement t <br />determine sufficient WOC time. Wait on Cement time shall not be less than 6 hours and be <br />sufficient to allow the cement to obtain a compressive strength 20% greater than the pressure <br />applied during the pressure integrity test. <br />3.12.10. Compressive Strength <br />Drill-out operations shall not commence until the cement samples exhibit a compressive strength c <br />3600 kPa as determined by cement tables and visual examination of the samples. <br />3.12.11. Pressure Test <br />A pressure test shall be conducted on the casing <br />The pressure test shall consist of: <br />before the cement is drilled out of the shoe joint. <br />(a) a low pressure test of usually 1400 kPa; and <br />(b) a high pressure test where the surface pressure for the high pressure test shall be 110% of <br />the maximum anticipated formation pressure in the next segment of the well. <br />3.12.12. Pressure Test -Cable Tool <br />For cable tool operations, the spool, casing valve and BOP equipment on the wellhead shall be <br />installed and tested to a pressure specified in the drilling program in conjunction with the static <br />pressure test on the intermediate casing string. <br />3.12.13. Pressure Integrity Test (PIT) <br />After the cement in the shoe joint and a maximum of one half metre (0.5m) of new formation have <br />been drilled, the operator shall conduct a PIT: <br />(a) using a low volume, high pressure pump; <br />16 <br />