A borehole where the formation flipped every two rods.
At Pap Onditi, Kisumu County, the ground refused to commit. Every two or three rods, the
formation switched between sticky clay and tough murram — forcing the
rig to pull the entire string, swap the bit, and run back in, again and again. Kisima
danced through the formation with constant hammer ↔ drag-bit alternation and delivered a
strong 6 cubic metres per hour for a domestic client whose neighbours' shallow wells had
all gone dry.
6 m³/hr confirmed Tool swap every 2–3 rods Domestic Kisumu County
A domestic borehole that had to outlast the shallow wells around it.
Pap Onditi sits in the lake-side Nyando hinterland — beautiful country, but the shallow hand-dug and
machine wells in the area have a habit of going dry or silting up. The brief was for a proper, deep,
sustainable domestic borehole. The formation had other ideas.
6 m³/hr
Confirmed yield
Domestic
End use — home supply
Every 2–3 rods
Tool-swap interval
Sustainable
Designed to outlast shallow wells
The challenge
Clay. Murram. Clay again. Every two rods.
Pap Onditi's subsurface is a layered cake — soft sticky clay sandwiched with bands of hard murram, repeating
all the way down. No single drilling tool handles both well. Clay wants a drag bit that
cuts and clears it. Murram wants a DTH hammer that pounds and breaks it. Switch the
formation, you must switch the tool — or you waste hours grinding the wrong cutter against the wrong rock.
Rods1–3
Soft clay
Sticky, slow, balls on the bit
Drag bit
⇄ Pull rods · swap tool
Rods4–5
Murram
Hard, gravelly — drag bit refuses
Hammer
⇄ Pull rods · swap tool
Rods6–8
Clay again
Hammer slips, drag bit returns
Drag bit
⇄ Pull rods · swap tool
Rods9–10
Murram band
Tough, gravelly, needs percussion
Hammer
⇄ Pull rods · swap tool
Rods11–13
Clay
Wet, sticky, drag-cut country
Drag bit
⇄ Pull rods · swap tool
Rods14+
Murram & water
Production zone reached — 6 m³/hr
Hammer
Two tools, one borehole, six tool swaps before water.
This is the kind of formation that breaks inexperienced crews. The temptation is to force one
tool through the whole column to save time — drag bit grinding uselessly against murram,
hammer chattering and slipping in soft clay. The borehole goes nowhere, the rig burns fuel, and the
client gets a quote for "extra days" with no extra metres to show for it.
Kisima played it straight. Every time the cuttings changed character, we pulled the entire
string, swapped the bit, and ran back in. Slower in the moment. Far faster overall — and the
only honest way to drill Pap Onditi to a sustainable depth.
Clay → drag bit, every timeA drag bit cuts and clears sticky clay cleanly. A hammer just smears it.
Murram → DTH hammer, every timeHard gravelly murram needs percussion. A drag bit polishes it and goes nowhere.
Read the returns, not the clockThe cuttings tell you when the formation has flipped. Swap then — not later.
Anatomy of a tool swap
Every swap costs time. Doing it anyway costs nothing.
A tool swap is not trivial. It's three steps, every time. Multiply by six swaps and you have a full day of
what looks like "no progress" — but it's actually the only progress that counts.
Pull every rod out
Trip the whole drill string back to surface, one rod at a time. The deeper you are, the more rods, the more time.
Break, swap, re-thread
Break the bit at the bottom of the string, change to the tool the next formation actually needs, and re-thread the assembly.
Run all the way back in
Trip every rod back into the hole, re-establish circulation, find the bottom — and drill on, now with the right tool for the rock.
Why the depth mattered
The shallow wells in this area don't last.
Pap Onditi is dotted with shallow hand-dug and machine wells that flatter the client for one season and
then disappoint. A proper drilled borehole, through every clay and murram band the formation throws up,
is the only way to land in an aquifer that actually keeps producing.
The neighbour's shallow well
Strong in the wet season — gone by January
Shallow wells in Pap Onditi tap perched, weather-dependent water. Two good rainy seasons and you
believe in it; one dry spell and the well silts, drops, or runs dry. The family is back to fetching.
Kisima's drilled borehole
Year-round 6 m³/hr — through every season
Drilled past the shallow perched water, through clay and murram alike, into a deeper aquifer that
carries volume across the dry months. The pump runs the same way in February as it does in April.
What 6 m³/hr means at home
Six cubic metres an hour is generous for a home.
With proper storage, this kind of yield covers a household, a compound, a kitchen garden, and still has
headroom for the unexpected. The pump runs short and rests long — exactly how a domestic borehole should live.
A household burns roughly 1,000–2,000 litres a day. This borehole delivers that in under twenty minutes.
The rest of the time the pump is off, the borehole is recovering, and the storage tank is full. That
is what "sustainable" actually looks like in a domestic setup.
Drinking & cookingReliable, deep-aquifer water — not perched seasonal supply
Bathing & laundryPressure and volume to run multiple taps without flicker
Kitchen gardenEasy capacity for vegetables and a small orchard
Share with neighboursPlenty of headroom to be the household with water on the road
On site in Pap Onditi
Photographs & a clip from the build.
Real material from the Pap Onditi site — the rig in action, tool changes on the deck, and the lake-country setting that frames the project.
Video · DrillDrilling at Pap OnditiRigRig on site — Pap OnditiCrewSiteSetupTool swapBit change on deckProgressDrilling on — Pap OnditiCompleteBorehole completion
"
The shallow wells around us never lasted past the dry season. Kisima drilled through clay and murram,
kept changing their tools without complaining, and gave us a borehole that has not slowed down. Six
cubic metres an hour — we share with the whole road.
Got an unpredictable formation? You need a contractor who carries both tools.
Clay one rod, murram the next — that's normal in Nyanza, parts of Western, and across Kenya's lake basin.
Kisima rigs are equipped and crewed to swap tools as the formation demands. No forcing, no shortcuts, no
half-finished holes.
Rig
Crew
Site
Setup
Tool swap
Progress
Complete
