Pump Output – Audit
NOTICE: Our Mathcad database got attacked and infected with a virus. Unfortunately, we’ve had to shut it down until further notice.
You can safely browse the pages, as the Mathcad server was separate to this main website, and was only accessible here. (We used something called an iFrame, which is like a window into a different website).
UPDATE 28th of January 2020: the virus happened just over a week ago. We’ve temporarily cut and pasted the text parts of the Mathcad pages rather than having blank pages there.
UPDATE 3rd of February 2020: We’ve been unable to recover the Mathcad worksheets and offer them in a format that provided total security to users. They were published a decade ago, and our IT people say that they would need a complete re-creation with the latest code and security fixes.
APPEAL: These 44 pages were created, and offered as a free resource for over a decade. We know from our website analytics that more than 1000 users visited each month. If only half of these regular visitors donated $20, we would have enough to create an even better solution. As you know, time is money, have these Mathcad pages saved you $20 in time over the years? We expect that they have, not to mention the learning opportunities provided to new engineers entering the industry.
Please, donate at least $20 as a one-off payment, to bring back the drillers Mathcad back as an always free to use resource!
YES! I’ve gotten value from the drillers Mathcad in the past, and a $20 is a very affordable way of saying thanks. I also want to preserve this tool for future engineers.
[tcb-script src=”https://plu.ug/n/d5equzho”][/tcb-script]
NO! I can’t or won’t donate to the restoration fund. I’m happy to spend a few minutes to offer a testimonial to help encourage the effort. These worksheets do have value. Offer Feedback.
Mud pump outputs, release 3, issued 26 January 2010. AUDIT version.
The current release of this worksheet exists in different versions. They are identical apart from the way they are formatted. The Work version hides intermediate calculations and allows the user to see the results just below the inputs. The Audit version displays all intermediate calculations.
Description
This worksheet takes inputs for the rig pumps and (optionally) hole and pipe sizes. It outputs pump flow rates and power, also fluid velocity if diameters entered.
User input
6 |
Pump piston diameter. L_Dpp =
0 |
inmm |
Pump rod diameter (0 for triplex SA pump). L_Dpr =
9 |
Pump stroke length. Lps =
100 |
Volumetric efficiency, %. ηv =
120 |
Strokes per minute. Rω =
152 |
psiPakPaMPaBar |
Pressure. Pp =
5 |
12.615 |
inmm |
Optional for AV’s;
Drillpipe diameter. L_Ddp =
inmm |
Casing ID. L_dcs =
8.5 |
12.25 |
inmm |
Drillcollar diameter. L_Ddc =
Hole diameter. L_Dh =
Click here when any values are modified to update the result.
Calculations
Calculate pump output per stroke; if Dpr = 0, assume duplex DA pump otherwise triplex SA pump.
Calculate pump output per minute
Calculate the output power for the SPM and pump pressure
Calculate the AV’s for the various annular clearances.
Results
Pump output per stroke
Pump output per minute
Hydraulic horsepower
Annular velocity DP/csg
Annular velocity DP/hole
Annular velocity DC/csg
Annular velocity DC/hole
Worksheet references
Institut Francais du Petrole. Drilling Data Handbook, 6th Edition.
Release 1 of this worksheet issued on 26 March 2008.
Release 2 standardised the variable names ( see www.drillers.com/download/StandardVariableNames.doc ) and added the different AV calculations.
Release 3 corrected an error in the calculation for vol/stroke and added Bar as an optional unit for pressure.
