LandDrillingPracticesforProtectionoftheEnvironmentAPIRECOMMENDEDPRACTICE52SECONDEDITION,JULY1,1995REAFFIRMED,SEPTEMBER2010LandDrillingPracticesforProtectionoftheEnvironmentExplorationandProductionDepartmentAPIRECOMMENDEDPRACTICE52SECONDEDITION,JULY1,1995REAFFIRMED,SEPTEMBER2010SPECIALNOTESAPIpublicationsnecessarilyaddressproblemsofageneralnature.Withrespecttopar-ticularcircumstances,local,state,andfederallawsandregulationsshouldbereviewed.APIisnotundertakingtomeetthedutiesofemployers,manufacturers,orsupplierstowarnandproperlytrainandequiptheiremployees,andothersexposed,concerninghealthandsafetyrisksandprecautions,norundertakingtheirobligationsunderlocal,state,orfed-erallaws.Informationconcerningsafetyandhealthrisksandproperprecautionswithrespecttoparticularmaterialsandconditionsshouldbeobtainedfromtheemployer,themanufac-turerorsupplierofthatmaterial,orthematerialsafetydatasheet.NothingcontainedinanyAPIpublicationistobeconstruedasgrantinganyright,byimplicationorotherwise,forthemanufacture,sale,oruseofanymethod,apparatus,orproductcoveredbyletterspatent.Neithershouldanythingcontainedinthepublicationbeconstruedasinsuringanyoneagainstliabilityforinfringementofletterspatent.Generally,APIstandardsarereviewedandrevised,reaffirmed,orwithdrawnatleastev-ery5years.Sometimesaone-timeextensionofuptotwoyearswillbeaddedtothisre-viewcycle.Thispublicationwillnolongerbeineffect5yearsafteritspublicationdateasanoperativeAPIstandardor,whereanextensionhasbeengranted,uponrepublication.StatusofthepublicationcanbeascertainedfromtheAPIAuthoringDepartment[telephone(214)953-11011.AcatalogofAPIpublicationsandmaterialsispublishedannuallyandup-datedquarterlybyAPI,1220LStreet,N.W.,Washington,D.C.20005.ThisdocumentwasproducedunderAPIstandardizationproceduresthatensureappro-priatenotificationandparticipationinthedevelopmentalprocessandisdesignatedasanAPIstandard.Questionsconcerningtheinterpretationofthecontentofthisstandardorcommentsandquestionsconcerningtheproceduresunderwhichthisstandardwasdevel...
