DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-58 IMCO Drilmod
|Date of introduction:||1979||Display technology:||LED-stick|
|New price:||Display size:||10 (8 + 2)|
|Size:|| 6.4" x 3.2" x
162 x 81 x 37 mm3
|Weight:||8.5 ounces, 240 grams||Serial No:|
|Batteries:||BP1A||Date of manufacture:|
|AC-Adapter:||AC9131||Origin of manufacture:|
|Precision:||13||Integrated circuits:||TMC0540 (ZA5511)|
|Program steps:||480-0||Courtesy of:||Joerg Woerner|
The innovative TI-59 was the perfect base for a lot of customized calculators. The idea behind these products was the novelty of the Solid State Software Modules™ with up to 5000 program steps.
IMCO DrilMod application was developed in 1979 by IMCO
Services, a division of Halliburton Co., Houston for both the TI-58
and TI-59. The module contains applications in the areas of well control,
annular and bit hydraulics, directional design, d-exponents, cost/ft, and
drilling mud, a total of 16 programs in all:
|Kick. Two separate programs: one to calculate kill mud weight and a standpipe pressure schedule fir circulating out invading fluid. And another kick program designed especially for directional wells and wells with tapered drill strings.
Well geometry. Processes hole drill string data into annular sections and stores results for use by other programs.
Hydraulics: Calculates bit pressure loss, hydraulic hp, impact force, jet velocity, and annular velocity.
OP hydraul. Makes nozzle size determinations.
ECD-S/S. Computes equivalent mud weight under circulating or tripping conditions.
Build and hold. Calculates final angle information and measured depth in design of “build and hold” directional wells.
d-exponent. Calculates d- and dc-exponents.
Cost/ft. Makes cost/ft calculations.
Rheology. Computes n- and k-values and calculates shear stresses at various shear rates.
Spot. Makes basic calculations needed for spotting around drill collars.
Mud report. Makes calculations required for completing the top of the API drilling mud report.
Solids (unweighted muds). Calculates solids content of unweighted muds and D/B-ratio.
Slip velocity. Calculates cuttings slip velocities.
Solids (weighted muds). Analyzes solids content of weighted muds.
Critical velocity. Calculates critical velocities in the annulus.
IMCO Services. Published in May 28, 1979 edition of Oil Gas Journal. © 1979 by PennWell Publishing Company.
miss the Optimum Mud Hydraulics application,
developed later in 1979 by Magnet
Cove Barium Corporation - better known as Magcobar.
IMCO released a second module (“BossMod” for well-control operations) before anybody
else and later developed a third module (“MudMod”) for internally use only.
We know five different approaches of the module expansion:
|Standard modules like the Master Library use only the small
the A,B,C,D, and E keys.
|Other modules like this Optimum Mud Hydraulics developed by
Cove Barium Corporation make use of a colorful keyboard mask.
|Customized calculators like the USMC
AV-8C calculator or insurance calculators|
sold by Allianz and others use special keyboard arrangements.
|The CAL-Q-TAX calculator uses an extender instead the usual drop-in modules.|
|The Kodak Q-700 Program
Adapter makes use of a snap-on cover with an|
Information about the DrilMod, BossMod and MudMod applications
provided by Mario Zamora. Thanks!
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, August 8, 2009. No reprints without written permission.