Safety Incidents OSHA Severe Injury Reports · 2015–2025
5,189,645Inspections Most recent open 2026-07-16 Last loaded 2026-07-20

OSHA Inspection: PATTERSON-UTI DRILLING CO LP LLLP RIG 135

Accident-driven inspection · Safety discipline

On , OSHA opened an accident-driven safety inspection of PATTERSON-UTI DRILLING CO LP LLLP RIG 135 in EL NINO FELIZ RANCH, MUNOZ #14, 14 MI N OF, ZAPATA, TX 78076 (NAICS 213111). OSHA activity number 310035555.

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Site address
EL NINO FELIZ RANCH, MUNOZ #14, 14 MI N OF
City
ZAPATA
State
TX
ZIP
78076
Mailing
PO BOX 1416, SNYDER, TX 79550
Inspection type
Accident-driven (A)
Scope
Complete (A)
Discipline
Safety
Advance notice
No
Union status
N
Opened
Closing conference
Case closed
Last modified
Data loaded
NAICS code
213111
SIC code (legacy)
1381
Employees
12
Ownership type
A

10 citations on file for this inspection.

5(a)(1)

Deleted Serious Gravity 10 1 instance 6 exposed
Issued
Abate by
Penalty
Initial $7000.00
Section 5(a)(1) of the Occupational Safety and Health Act of 1970:  The
employer did not
furnish employment and a place of employment which were free from
recognized hazards that
were causing or likely to cause death or serious physical harm to
employees in that employees
were exposed to a struck-by hazard:
At this remote drilling rig site, the employer does not determine if
pressure is
present and if pressure is available, relieve the pressure prior to
employees
unclamping the rotating head and removing the rubber gasket.  Employees are
exposed to the hazard of being struck-by high pressure gas, drilling mud
or other
equipment related to the sudden and violent release of pressurized natural
gas.
Among other methods, one (1) feasible and acceptable abatement method to
correct the hazard is to:
Determine the presence of pressure by the readings on the choke
panel, open hydraulic control remote/relief (HCR) valve to see if
casing pressure is present. Then open up choke manifold and bleed
off pressure.  Determine why pressure was present, i.e., plugged
lines.  Conduct a Job Safety Analysis (JSA) and follow its
guidelines prior to sending any personnel below the rotary table.
Recent events (2)
  • — F (S)
  • — Z (S) $7000.00

1910.242 A

Serious Gravity 05 1 instance 3 exposed
Issued
Abate by
Penalty
Initial $3500.00 · Current $1750.00 Reduced
Recent events (2)
  • — F (S) $1750.00
  • — Z (S) $3500.00

1910.305 B01

Serious Gravity 01 1 instance 6 exposed
Issued
Abate by
Penalty
Initial $1500.00 · Current $750.00 Reduced
Recent events (2)
  • — F (S) $750.00
  • — Z (S) $1500.00

1910.305 G02 II

Serious Gravity 01 1 instance 6 exposed
Issued
Abate by
Penalty
Initial $1500.00 · Current $750.00 Reduced
Recent events (2)
  • — F (S) $750.00
  • — Z (S) $1500.00

1910.307 B

Serious Gravity 10 3 instances 8 exposed
Issued
Abate by
Penalty
Initial $5000.00 · Current $2500.00 Reduced
Recent events (2)
  • — F (S) $2500.00
  • — Z (S) $5000.00

1910.151 C

Deleted Repeat Gravity 01 2 instances 3 exposed
Issued
Abate by
Penalty
Initial $7500.00
Recent events (2)
  • — F (R)
  • — Z (R) $7500.00

1910.305 G02 III

Repeat Gravity 01 2 instances 8 exposed
Issued
Abate by
Penalty
Initial $7500.00 · Current $3750.00 Reduced
Recent events (2)
  • — F (R) $3750.00
  • — Z (R) $7500.00

1904.32 B02 II

Other-than-serious Gravity 00 2 instances
Issued
Abate by
Penalty
Initial $1000.00
Recent events (2)
  • — F (O)
  • — Z (O) $1000.00

1910.145 C02 I

Other-than-serious Gravity 01 2 instances 3 exposed
Issued
Abate by
Penalty
Initial $1000.00 · Current $500.00 Reduced
Recent events (2)
  • — F (O) $500.00
  • — Z (O) $1000.00

1910.145 C03

Other-than-serious Gravity 01 2 instances 4 exposed
Issued
Abate by
Recent events (2)
  • — F (O)
  • — Z (O)

RNWBL

This record is reproduced from the U.S. Department of Labor Open Data API (OSHA inspection dataset). The original IMIS detail view is available at OSHA's Establishment Search for activity number 310035555.