M-I DRILLING FLUIDS LLC

Doing business as M-I SWACO

Houston, TX · Interstate · 37 power units · Safety rating: Satisfactory

Call (281) 285-8500
Operating authority
Active
MC271174: Motor carrier active
FMCSA Motus · Oct 18, 2026
Liability insurance (BI&PD)
$750,000
Required minimum: $1,000,000
No cargo cover filed with FMCSA
FMCSA Motus · Oct 18, 2026
Vehicle out-of-service rate
9.1%
1 of 11 vehicle inspections · Texas avg 25.1%
FMCSA inspections · Oct 18, 2024 – Oct 18, 2026
FMCSA registration age
38 years
USDOT added Apr 7, 1988. Not a founding date.
FMCSA census · Oct 18, 2026

Green means the FMCSA record shows it. It does not confirm who you are talking to, or that a policy covers your specific load.

Operating authority

MC271174 FMCSA Motus · Oct 18, 2026

Motor carrier
Motor Carrier of Property (Except Household Goods)
Active
Liability insurance on file$750,000 (required: $1,000,000)

Confirm current authority: Motus record for USDOT 312736 ↗

Insurance on file

Liability (BI&PD) pays for injury and damage to other people and property; it does not cover the freight. Cargo insurance covers the freight. FMCSA only requires cargo filings from household goods carriers and freight forwarders, so most carriers file none: ask for a cargo certificate that fits your load. No cargo cover filed with FMCSA.

TypeDocketLayerInsurerCoverageEffectiveStatus
Liability (BI&PD)MC271174PrimaryTravelers Property Casualty Company of America
Policy 257T0343 · BMC-91X
$750,000Jul 1, 2018Active

Source: FMCSA Motus · Oct 18, 2026. Identical filings repeated in the FMCSA data are shown once; a filing listed under two dockets is one policy, not extra coverage. Coverage is the maximum amount filed with FMCSA, not the full policy.

Confirm current filings: Motus record ↗ and ask the insurer for a certificate naming you as holder.

Roadside inspections Oct 18, 2024 – Oct 18, 2026

11inspections
9.1%vehicle out-of-service
1 of 11 · Texas avg 25.1%
0.0%driver out-of-service
0 of 11 · Texas avg 7.7%
5violations written on inspection reports
10 most recent inspections
DateStateLevelViolationsOut of service
Jun 5, 2026ND10No
Jan 19, 2026TX20No
Oct 30, 2025TX10No
Oct 29, 2025TX21Yes
Oct 7, 2025ND10No
Aug 19, 2025TX10No
Aug 1, 2025TX21No
Jan 2, 2025TX22No
Dec 11, 2024TX10No
Dec 9, 2024AR11No
How these rates are calculated

Period: Oct 18, 2024 – Oct 18, 2026. Vehicle rate = vehicle inspections with a vehicle out-of-service order ÷ vehicle inspections (levels 1, 2, 5 and 6). Driver rate uses levels 1, 2, 3 and 6. The Texas average covers 343,539 vehicle and 454,274 driver inspections of all Texas-based carriers in this period. It mixes every type of operation, so compare with care; rates based on a handful of inspections say little. FMCSA's own SMS measures are weighted differently: SMS profile ↗ · SAFER snapshot ↗

Violations in FMCSA's SMS last 24 months

11 violations counted in FMCSA's Safety Measurement System (SMS), 4 of them serious enough to put the driver or vehicle out of service.

Why is this different from the 5 violations above?

The inspections section's number counts every violation written on the inspection reports in our Oct 18, 2024 – Oct 18, 2026 window. The SMS count comes from FMCSA's own monthly SMS snapshot, which uses its own 24-month window and only the violations it scores. Both are FMCSA figures; they measure different things.

Category (FMCSA BASIC)ViolationsOut of serviceShareTexas share
Hazardous Materials Compliance5345.5%0.6%
Vehicle Maintenance4136.4%78.8%
Hours-of-Service Compliance109.1%11.4%
Unsafe Driving109.1%4.8%
10 most frequent violations
ViolationTimesOut of service
HM (Shipping Papers) - Operate a motor vehicle without a required shipping paper. NOTE: An error in the shipping description or an incomplete shipping description
Documentation - HM · Hazardous Materials Compliance · code 177817AHMSP
11
HM (Placarding) - 50% or more of the required placards for a category of material (hazard class or division) are missing. CVSA Inspection Bulletin 2017-03 - Displ
Markings - HM · Hazardous Materials Compliance · code 177823AHMPMCNP50%
11
HM (Transport Vehicle Markings) - Any ID Number misrepresents the material transported.
Markings - HM · Hazardous Materials Compliance · code 177823AHMTVMCMID
11
Tire-flat and/or audible air leak
Tires · Vehicle Maintenance · code 39375A3
11
DOT-SP or special permit number not entered on shipping paper
Documentation - HM · Hazardous Materials Compliance · code 172203A
10
HM (Highway Carriage) - Failing to have HM shipping papers readily accessible.
Documentation - HM · Hazardous Materials Compliance · code 177817E2HMHC
10
HOS (ELD) - ELD Form and Manner
Other Log/Form & Manner · Hours-of-Service Compliance · code 39524
10
Driver- Inattentive or Distracted Driving
Dangerous Driving · Unsafe Driving · code 3922INAT
10
Emergency Equipment - Fire Extinguishers - unsecured
Emergency Equipment · Vehicle Maintenance · code 39395A4EEUS
10
No or defective lighting devices or reflective material as required
Reflective Sheeting · Vehicle Maintenance · code 39311
10

Source: FMCSA SMS violation file, inspections in the last 24 months, published Oct 18, 2026. "Share" is this company's mix of violations; the Texas column is the mix across all Texas-based carriers, so you can see which kinds of problems stand out. A high count partly reflects fleet size and how often trucks are inspected.

Crashes Oct 18, 2024 – Oct 18, 2026

No reportable crashes in this period.

Company details FMCSA census · Oct 18, 2026

USDOT number312736
MC / docketMC271174
Legal nameM-I DRILLING FLUIDS LLC
DBA nameM-I SWACO
OperationInterstate
Business typePartnership
Power units37
Drivers25
Annual mileage404,424 (2024)
HazmatYes
Safety ratingSatisfactory (Jan 12, 2004)
USDOT number addedApr 7, 1988 · 38 years ago
Last MCS-150 updateJun 19, 2025

Cargo carried

General FreightLiquids/GasesOilfield EquipmentChemicalsCommodities Dry BulkOtherOILFIELD SERVICE MATERIALS

Questions about M-I DRILLING FLUIDS LLC

What does M-I DRILLING FLUIDS LLC's operating authority allow?

MC271174: Motor carrier (may haul regulated property for hire).

Which information about M-I DRILLING FLUIDS LLC is old or missing?

Nothing notable: authority and insurance come from current Motus data and there is enough inspection history to compare.

What should I verify before booking M-I DRILLING FLUIDS LLC?

Confirm the authority and insurance on the Motus record for USDOT 312736. Call the company back on the phone number on file, (281) 285-8500, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC271174, and ask the insurer for a certificate of insurance naming you as certificate holder.

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Company details from the FMCSA Company Census File (Oct 18, 2026). Inspections and crashes from FMCSA MCMIS files. About our data · Report an error.