02 / WORKOVER TOOLBOX
Know your numbers.
Then put them to work.
Tubing, rods, fluids and space-out. Pick the job, put in your measurements, and see the math behind the answer.
Browse the tools
PICK THE WORK IN FRONT OF YOU
What are we working on?
Use measured values. Check the units.
Your equipment procedure still comes first.
PUT THE NUMBERS TOGETHER
ASSEMBLY → SUBS → VOLUMESAssembly, subs and wellbore volumesHave a whole string to work through? Lay out your equipment, compare the subs you have, and save the measurements with your pictures.Open field jobs01
Tubing & Anchors
Stretch, tension, buoyancy, thermal, pressure-area, and pipe-body arithmetic.
Tubing Stretch from Added TensionEstimate the incremental elastic stretch of the free tubing above an anchor when a known force is added.Open Added Tension from Measured StretchConvert a measured incremental stretch into an equivalent added tension using the tubing's elastic properties.Open Anchor Tension WorksheetCollect the manufacturer, model, manual revision, and conditions required to determine an anchor setting tension. A universal formula is intentionally not applied.Open String Weight & Simplified BuoyancySum the air weight of a tubing string and estimate a simplified buoyed weight for equalized, same-liquid conditions.Open Weight-Indicator & Load HeadroomArithmetic for a surface weight indicator reading after a pull change, plus headroom against an externally approved allowable load.Open Thermal Length ChangeEstimate free thermal length change and a qualified fixed-end elastic force change from a temperature change.Open Pressure-Area ForceConvert a pressure difference acting over an identified effective area into a force, with a circular-area helper.Open Nominal Pipe-Body YieldMultiply the pipe steel area by a verified minimum yield strength to obtain a nominal body yield figure.Open
02
Volumes & Fluids
Tubing, annular, and tank volumes, displacement, and hydrostatic pressure.
Tubing Internal VolumeCompute the nominal bore volume of tubing from its inside diameter and length, including mixed-diameter sections.Open Annular VolumeCompute annular volume between casing inside diameter and tubing outside diameter over an interval.Open Pipe DisplacementCompute metal (wall) or closed-end pipe displacement as separate, explicitly chosen modes.Open Hydrostatic Pressure & Equivalent DensityConvert liquid density and vertical height to hydrostatic pressure (or the reverse), summing multiple columns.Open Tank VolumeCompute rectangular or vertical-cylindrical tank volume from internal dimensions and liquid height.Open
03
Pumps & Circulation
Pump time, output, strokes, and average annular velocity.
Pump Time, Output & StrokesCompute pump output, pumping time, and required strokes from volume and effective displacement.Open Average Annular VelocityCompute average annular fluid velocity from flow rate and annular capacity or geometry.Open Rod-Pump DisplacementCalculate ideal and efficiency-adjusted single-acting displacement from relative downhole swept stroke.Open Geometric Pump Chamber-Volume RatioCompare maximum geometric chamber volume with a positive measured minimum chamber volume.Open
04
Tallies, Rods & Space-Out
Reviewed tally length, equipment markers, geometric space-out, and rod counts.
Tally, Markers & Geometric Space-OutCompute assembly length and geometric space-out from a reviewed tally, component lengths, and a target depth.Open Rod Singles, Triples & Measured LengthCompute rod counts, nominal length, and measured length difference for singles, triples, and pony rods.Open Tapered Rod-String Elastic ExtensionSum signed incremental elastic extension across explicitly loaded rod sections.Open Rotaflex Spacing WorksheetDocument an exact Weatherford Rotaflex configuration and sum approved, signed spacing corrections without inventing a pump-clearance target.Open Pumpjack Spacing & Double-Tag WorksheetRecord exact pumpjack, bridle, tag, pump, and operating-envelope measurements and sum approved signed adjustments without inventing an off-bottom target.Open Pump Target → Measured SubsEnter the off-bottom clearance you need. Compare measured replacement subs and surface adjustment, with both stroke ends and measurement uncertainty checked.Open
These are arithmetic and geometry tools. Anchor setting loads, well-kill instructions, and “safe pull” determinations require manufacturer data and approved procedures and are intentionally not generated here.
DINO RIGBuilt by Barney Global LLC · www.barneyglobal.com