1、Recommended Practice on Determining the Static Gel Strengthof Cement FormulationsANSI/API RECOMMENDED PRACTICE 10B-6FIRST EDITION,AUGUST 2010REAFFIRMED,DECEMBER 2019ADDENDUM 1,JANUARY 2020ISO 10426-6:2008(Modified),Petroleum and natural gas industriesCements and materials for well cementingPart 6:Me
2、thods for determining the static gel strength of cement formulationsRecommended Practice on Determining the Static Gel Strengthof Cement FormulationsUpstream SegmentANSI/API RECOMMENDED PRACTICE 10B-6 FIRST EDITION,AUGUST 2010REAFFIRMED,DECEMBER 2019ADDENDUM 1,JANUARY 2020ISO 10426-6:2008(Modified),
3、Petroleum and natural gas industriesCements and materials for well cementingPart 6:Methods for determining the static gel strength of cement formulationsDate of Issue:January 2020 Affected Publication:API Recommended Practice 10B-6,Recommended Practice on Determining the Static Gel Strength of Cemen
4、t Formulations,first Edition,August 2010.Addendum 1 Annex A:The last sentence of the second paragraph,including equations(A.1)and(A.2),shall be replaced by the following:The CSGS can be calculated as XCSGS,SI in SI units of pascals as given by Equation(A.1):XCSGS,SI (pfo)(2.5)/(L/Deff)(A.1)where pfo
5、 is the fluid overbalance pressure,expressed in kilopascals;2.5 is the conversion factor;L is the length of the cement column,expressed in meters;Deff is the effective diameter of the wellbore,expressed in centimeters.and as XCSGS,USC in USC units of pounds force per 100 square feet,as given by Equa
6、tion(A.2):XCSGS,USC (pfo)(300)/(L/Deff)(A.2)where pfo is the fluid overbalance pressure,expressed in pounds-force per square inch;300 is the conversion factor;L is the length of the cement column,expressed in feet;Deff is the effective diameter of the wellbore,expressed in inches.Special NotesAPI pu
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