Drilling Contractor Insurance: Coverage and Cost by Rig Type

An oilfield service contractor typically needs $1M/$2M general liability, $1M commercial auto, statutory workers comp with $1M employers liability, and a $5M umbrella before an operator will let a crew on the pad, because that is what the standard master service agreement requires. For a five-person crew, that package usually runs $25,000 to $75,000 a year.

A drilling contractor’s program is built around three numbers: the rig’s replacement value on an inland marine form, the liability limits the drilling contract requires (typically $1M/$2M general liability with a $5M excess), and workers comp on some of the highest-rated payroll classes in commercial insurance. Water well and geothermal drillers buy a smaller version of the same structure.

What a drilling contractor’s program covers

Source: Alliance Risk program design for drilling and well-service accounts.

The rig itself is the concentration of value, and it is scheduled equipment, not property: the same inland marine structure as our contractors equipment insurance page describes, with drilling-specific wording layered on. The two questions that decide claim outcomes are whether values are agreed or depreciated, and whether the tools are covered while in the hole, because in-hole loss is both the likeliest event and the most commonly excluded one. It is the first thing we check on any incumbent rig schedule.

What the drilling contract allocates to you

Onshore drilling contracts (IADC forms and operator paper) run on knock-for-knock indemnities: you take your people and your equipment, the operator takes theirs, and the operator takes the well. That structure is why drilling contractors do not buy control of well coverage; the well is the operator’s to insure, and the OEE policy sits on the operator’s schedule. Your side of the ledger is the rig, the crew, the fleet, and the pollution your operations cause, the same seams mapped across the whole oil and gas insurance program, and the contract’s insurance exhibit will read much like the standard oilfield service MSA exhibit: additional insured with completed operations, waivers of subrogation across lines, primary and non-contributory wording, and a $5M excess. Anti-indemnity statutes in Texas, New Mexico, Louisiana, and Wyoming cut across knock-for-knock language, so the indemnity you signed and the indemnity a court will enforce are not always the same thing; your liability program should be built for the second one.

Water well and geothermal drillers: same structure, smaller numbers

Most searches for well drilling insurance come from water well contractors, and the program is the honest miniature of the oilfield version: GL around $5,000 to $15,000 a year, a rig floater, auto, and WC, with contractors pollution liability added where drilling fluids and aquifer work create exposure. The underwriting difference is appetite: water well and geothermal drillers fit several standard and program markets, while oil and gas drilling is largely an E&S placement. If you drill both, say so on the application; a water well market that discovers oilfield payroll at audit is a non-renewal.

How much does drilling contractor insurance cost?

Rate drivers underwriters actually move on: rig values and age, depth rating and the work you actually take, payroll by class code, radius and rig-move frequency, five years of loss runs, and whether you want in-hole tools covered. The application should read like a rig tour; thin submissions in this class get declined, not discounted. And if any rig or crew works outside the US, add foreign voluntary workers compensation before the deployment, because domestic WC stays home.

Frequently asked questions

General liability with the underground resources restriction addressed, rig and equipment coverage on an inland marine form, commercial auto for rig moves and crew trucks, workers comp, contractors pollution, and the excess limit your drilling contract requires, usually $5M. The rig floater and WC carry most of the premium.

A one-rig water well driller with a small crew typically pays $15,000 to $40,000 a year across GL, rig coverage, auto, and WC. The rig’s insured value and workers comp payroll drive the number more than revenue does.

No. Rigs and support equipment are mobile and belong on an inland marine / contractors equipment form with scheduled values. The claim-time difference that matters is agreed value versus actual cash value; depreciation on a 15-year-old rig is the dispute you avoid by settling valuation at binding.

Only if in-hole or care, custody and control coverage is specifically bought; standard equipment forms exclude property below the rotary table or in the hole. In-hole loss is the most frequent large equipment claim drillers face, and the exclusion is the most common surprise.

The operator. Knock-for-knock drilling contracts put the well on the operator’s side, insured under an operators extra expense policy, while the driller insures the rig, crew, and fleet. Your contract’s indemnity article is the map; read it against your liability wording before you spud.

Each party bears its own people and property regardless of fault: your crew and rig are yours, the operator’s personnel and the well are theirs. It only works if each side’s insurance matches its side of the ledger, and state anti-indemnity statutes can override parts of it.

Yes. Fuel, drilling fluids, and mud are pollutants under GL exclusions, and most modern drilling contracts require contractors pollution liability at $1M. Aquifer contamination claims make this coverage non-optional for water well drillers as well.

Drilling payroll sits on dedicated high-rate NCCI classes, separate from well servicing and from shop or clerical payroll. Segregate payroll by operation from day one; auditors reclassify blended payroll upward, never downward.

The standard exhibit mirrors oilfield MSAs: $1M/$2M GL, $1M auto, statutory WC with $1M employers liability, and $5M excess, with additional insured, waiver, and primary wording. Deeper hole, H2S, or larger operators push the excess to $10M.

No. Many states require licensed drillers to post a small license or plugging bond, which guarantees performance to the state; it protects the public, not you, and pays nothing toward your rig, crew, or liability. You need both.

A well schedule with depths, location, producing or drilling status, pressure and H2S notes, your working interest percentages, and loss history. For drilling programs, the AFE and casing design. Thin schedules get quoted; vague ones get declined or loaded.

A rig list with values, age, and depth rating; payroll by class; fleet schedule with radius; five years of currently valued loss runs; your drilling contract’s insurance exhibit; and a plain description of the work you take and the work you refuse. That last sentence changes quotes more than any other.

Get your rig schedule quoted by Alliance Risk

A drilling contractor’s program is three programs holding hands: a rig floater that has to be valued honestly, a liability tower that has to match the contract you signed, and a payroll structure that has to survive a WC audit. The failures are predictable: in-hole tools excluded, agreed value never negotiated, an excess that skips the auto policy underneath it. Every one is cheaper to fix at renewal than at claim.

Coverage is half of it. The other half is what underwriters price: rig maintenance records, rig-move procedures, driver files, payroll segregation, and the contracts you sign. Insurance pays for the loss. Your file sets the rate.

We place drilling contractors, water well through oilfield, across standard, program, and E&S markets, so we can tell you which market actually wants your rig profile and where your current schedule leaves value uncovered. If your incumbent has it right, we will say so.

Send us your rig list with values, your payroll by class, and your drilling contract’s insurance exhibit. We will map it line by line and show you the number.