rig-hand-fieldnotes/rig-gear.html
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<title>Rig Gear Field Reference — Alwyn Phillips</title>
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<nav><div class="wrap"><fort-nav><nav class="fort-nav" data-fort="nav"><a href="/">Alwyn Phillips</a><a href="/films/the-drill-wont-lie/">Index</a><a href="/hydraulic-troubleshooting.html">Hydraulic System Troubleshooting for Drilling Rigs</a><a href="/rig-gear.html" class="active" aria-current="page">Rig Gear Field Reference</a><a href="/the-drill-wont-lie.html">The Drill Won't Lie</a></nav></fort-nav></div></nav>
<div class="wrap">
<div class="sub">Alwyn Phillips · Field Notes</div>
<h1>Rig Gear, Field Reference</h1>
<p style="font-size:19px;max-width:46em;line-height:1.6">Not the marketing cut-sheet. This is the reference I actually keep in the cab — the hydraulics, the fluids, and the two-minute listen. Nothing here gets you a certification; it gets you through the morning without a rebuild.</p>
<div class="toc">JUMP: <a href="#fluid">HYDRAULIC FLUIDS</a> <a href="#listen">THE LISTEN</a> <a href="#redflags">RED FLAGS</a></div>
<h2 id="fluid">Hydraulic fluids — the lifeblood</h2>
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<div>
<p>The fluid carries the signal. A good system wants a stable viscosity that holds across the heat of a long run, water and sludge kept out, and a film that sticks to seals. When viscosity thins in the heat, the whole circuit loses pressure and the rod starts to tell you lies.</p>
<table>
<tr><th>FLUID</th><th>BEST FOR</th></tr>
<tr><td>Mineral oil</td><td>Standard rigs, general use, cheap to replace</td></tr>
<tr><td>Water-glycol</td><td>Fire-risk sites, but thinner film — watch seals</td></tr>
<tr><td>Synthetic</td><td>Cold starts and hot runs; costs more, lasts</td></tr>
</table>
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<img src="https://images.pexels.com/photos/15961091/pexels-photo-15961091.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="Offshore platform, hydraulic-scale machinery"/>
<div class="cap">SCALE ISN'T THE POINT — PRESSURE IS, AT ANY SIZE</div>
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<h2 id="listen">The two-minute listen</h2>
<div class="note"><b>SEQUENCE, NO SKIPPING.</b> 1) Start at the pump, listen for a clean steady hum — a skip means air in the line. 2) Walk the hoses, hand over each fitting, feel for heat and pulse. 3) Put a foot on the deckplate below the swivel — the rod talks through your boot. 4) Pull the sample, check it against the morning's color. Two minutes. No exceptions.</div>
<p>A skip in that stroke is air in the line. Air costs you seals, costs you head pressure, and — fifty feet down — costs you a stuck drill and a whole lost day. Fix it on the surface or pay for it in the ground.</p>
<h2 id="redflags">Red flags that stop the spin</h2>
<table>
<tr><th>WHAT YOU HEAR / FEEL</th><th>WHAT IT IS</th><th>MOVE</th></tr>
<tr><td>Silence at the swivel</td><td>Lost prime, or a blown seal upstream</td><td>Stop. Re-prime before anything turns.</td></tr>
<tr><td>Knock on the up-stroke</td><td>Internal bypass in the cylinder</td><td>Test pressure, don't trust the gauge alone.</td></tr>
<tr><td>Hot fitting that stays hot</td><td>Restriction or collapsing hose wall</td><td>Trace the line, flex it, feel for the soft spot.</td></tr>
<tr><td>Milky fluid in the sample</td><td>Water's in the tank</td><td>Drain, flush, find the breather leak.</td></tr>
</table>
<p style="margin-top:28px">A drilling rig is an integrated system that bites down in a straight line — understand the pressure path and you understand the whole machine. Humans and pressure keep the same secret: a steady signal reads honest, a scared one stutters.</p>
<p style="font-family:'Courier New',monospace;font-size:14px;color:var(--steel)">Data twin: <a href="rig-gear.json" style="color:var(--hyd)">rig-gear.json</a> · Back to <a href="index.html" style="color:var(--hyd)">home</a></p>
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<footer><div class="wrap">ALWYN PHILLIPS · kept between rebuilds, not between marketers</div></footer>
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