Lito Panis's Page

"damn, why cant I see all these answer before I post a reply, I would not have bothered."

"Not enough info, you need pressure drop (loss) of surface lines (standpipe kellyhose), drill pipe, HWDP and Collars as well as any other dynamic influences as in MWD, motor, Underreamer jetting etc etc. Less important, but required for calculations…"

"you must not rely to any rule of thumb if there is any. Every well is different, different BHA`s different mud systems, what about your drill string, liners in mudpump etc. you better start your calculations."

"Lito, for calculate surface pressure , you have to send string size (DPs , HWDPs & DCs & Motor )"

"i appreciate your immediate response to my inquiry. Engineering solution is good and I still want to know the answer in that sense, but I also need to know, a sort of rule of thumb, for a driller consumption- a non -engineering lay people so he…"

"acording to this type of fluid we can use power law model to calculate the pressure. first of all you have to know the type of  flow (tubulent or laminar) that you have in each section by calculating  RENOLDS NUMBER. - inside the DP, HWDP…"

"our fluid is KCL water base mud with viscosity of 55,  842 ft of BHA  with 11  jts of 5 in HWDP, 15 jts of 6.5 in DC, 1 NBS and 2 string stab send to 8950 ft with a 5 in DP. Float valve is installed in the string. spm of 60 and 65…"

"as they said, we need enough data to caculate the pressure losses. for example, we need the  type  of fluid used ( model of fluid)  its propriety, the  tubulars size used,....."

"can't be answered with limited information given."

"There are many parameters that enters into account when calculating pressure losses such as drill string geometry, mud rehology and flow type. You 'll find more details on "Drilling data handbook" section G."

"Your pressure losses will vary with the flow rate and mud viscosity. There is not enough data to calculate the total pressure loss now. When you would have all required data, you may find all formulas in many Drilling Handbooks. But the easiest for…"

"kamusta na? kelan ka magiging AD?kamusta ang fren ko si Gaitano?Pakisabi pngpray ko na siya at pinatawad ko siya at wala akong sama ng loob sa kanya, nagpaslamat pa kamo sa nangyari at natuto akong magpakumababa."

"Joe this is Lito Panis, im here in kuwait, how's saudi?God bless"