Top of wire, blind box sizing and well volumes, worked out in seconds.
Top of wire or top of fish for any lost wire, toolstring, cable, CT or tubing, drawn on your well with fishing tools.
Open › TOOL 02Smallest and largest blind box that will work.
Open › TOOL 03Tubing, annulus, fluid height and bailer runs.
Open ›TOOL 04Safe pull, string weight, overpull and stem needed against pressure.
Open ›TOOL 05Hydrostatic pressure, gradient and kill fluid density.
Open ›TOOL 06Pressure, depth, volume, density, force, flow and temperature.
Open ›TOOL 07Slickline wire strengths and X/XN landing nipple sizes.
Open › TOOL 08A, B and C annulus limits: burst, collapse, packer, formation and wellhead, with MOP and MAWOP.
Open › TOOL 09Oilfield openings in Basra and Iraq, linked to LinkedIn.
Open ›Every result shows its working, and the source of every table is printed under it.
Works on a phone, in metres or feet, and in 10 languages including Arabic.
Calculations run in your browser. Save jobs and print a PDF for the report.
Oilfield openings in Basra and Iraq. Each one opens on LinkedIn in a new tab.
Reach slickline, wireline and well services people in Basra and across Iraq, on the tools they use at work.
Your opening pinned at the top of Vacancies with your company name, until it is filled.
Your name and link on one calculator, seen every time a crew member works out a job.
A short profile for your rental tools, units or crews, in a directory we are building.
Questions, corrections or ideas for the next tool are welcome.
Tell us which field calculation you still do by hand. The most requested ones get built next.
Companies can post openings or sponsor a tool. Email or WhatsApp us using the details below.
| Value | Unit | Note | |
|---|---|---|---|
| Well no. | Shown on the drawing and in the copied summary | ||
| Units | Metric by default. Switching converts the numbers already entered. | ||
| Counter when wire broke | m | Depth of toolstring at the break | |
| Completion | |||
| Tubing size | Picks the fallback factor from the table above | ||
| Wire size | |||
| Wireline fallback factor | % | Auto | |
| Counter when spooled back | m | Reading when the broken end reached the counter | |
| C1 (sheave to hay pulley) | m | Fill both to work out the distance, or type the distance directly below | |
| C2 (hay pulley to counter) | m | ||
| Counter to 0 point (C1×2 + C2) | m | Entered directly | |
| Toolstring after the break | |||
| Final resting depth (tag) | m | Where the toolstring is now | |
| F, distance fallen | m | ||
| Well path | |||
| m | ft | |
|---|---|---|
| Wire lost in hole | ||
| Fallback | ||
| Toolstring depth now | ||
| Estimated top of wire |
| Well | Saved | TOW |
|---|
| Value | Unit | |
|---|---|---|
| Tubing | ||
| Tubing ID | in | |
| Nipple ID (smallest above the fish) | in | |
| Rope socket / fishing neck OD | in | |
| Wire OD | ||
| Top of fish (rope socket) depth | m | |
| Depth of the min. ID (nipple) | m | |
| Top of wire (TOW) depth | m | |
| Minimum blind box OD | in | |
| Maximum blind box OD | in | |
| Blind box size range | ||
| Suggested blind box OD | ||