RIG 4 · DRILLING / 8,400 FT TD / KERN RIVER RIG 7 · DRILLING / 6,200 FT TD / BELRIDGE RIG 11 · WORKOVER / CYMRIC 22-A RIG 14 · MOBILIZING / SAN ARDO 9 RIG 18 · DRILLING / 11,800 FT TD / LOST HILLS
© 2026 Diamond H Drilling Co. IADC member · CAlGEM permitted
CALIFORNIA · OPERATING SINCE 1971

Drill it. Work it. Done. Eight rigs in the field.

Diamond H Drilling Co. has been turning hole for California operators for 54 years. Vertical, deviated, horizontal, workover. Eight active rigs from 75 ft singles to 1,500 hp triples. IADC SafeT gold rating. Family-owned, Bakersfield-headquartered.

54
Years in operation
12
Rigs in fleet · 8 active
2.1M
Feet drilled to date
0.68
EMR · 2024 rating
Capability Matrix · Section 02

Six drilling & workover
service lines. All in-house.

Diamond H runs everything from 75-ft singles for shallow workover to 1,500 hp triples for deep development. Same crew, same yard, same documentation regardless of which rig you book.

#
Service
Scope
Spec
Action
01
Vertical Drilling
DEEP DEVELOPMENT
Vertical hole production drilling for conventional development wells. Mud, casing, cement, and completion supervision in-house. IADC-certified driller and crew.
12,500FT TD CAPACITY
02
Directional & Deviated
DIRECTIONAL CONTROL
Build-and-hold and S-curve trajectories. MWD and steering tools on contract. Directional supervisor on every job. Used for offset development and shallow horizontals.
85°MAX INCLINATION
03
Horizontal Drilling
EXTENDED REACH
Lateral horizontal sections for heavy oil reservoirs. Geosteering on contract. Coordinated with operator's geological staff. Suitable for diatomite, sand, and conglomerate.
3,500FT LATERAL MAX
04
Workover & Rework
PRODUCTION RESTORE
Rod and tubing pulls, pump changes, BHA changes, well intervention, fish recovery. Five-axle and six-axle pulling units. Heat-rated for steam-injected wells.
250,000LB CAP
05
Plug & Abandonment
REGULATORY CLOSURE
DOGGR/CalGEM-compliant P&A. Cement pumping, surface restoration, regulatory documentation. Used by operators clearing wells under California Idle Well Management.
CalGEMFULL COMPLIANCE
06
Casing & Cementing
WELL CONSTRUCTION
Surface, intermediate, and production casing runs. In-house cementing crew and pumps. Coordinated with mud logging and wireline service providers.
13⅜"SURFACE CSG MAX
Full Capability Sheet
The Fleet · Section 03

Twelve rigs. All Diamond H.

Every rig in our fleet is owned, maintained, and crewed in-house. No leased rigs, no day-work scramble. The driller running your hole has worked on Diamond H rigs for an average of nine years.

RIG 7 · 1,000 HP DOUBLE

Belridge 33

HP 1,000DEPTH 10K FT
RIG 11 · WORKOVER 250K

Cymric 22-A

CAP 250K LBMAST 104 FT
RIG 4 · 1,500 HP TRIPLE

Kern River 12-B

HP 1,500DEPTH 15K FT
RIG 14 · 600 HP SINGLE

San Ardo 9

HP 600DEPTH 5K FT
Full Fleet Spec Sheet
Engagement · Section 04

From AFE to TD. Four phases.

How we run an engagement, regardless of rig class or job size. Written daily reports. Real-time updates. No surprises at the wellhead.

01PRE-JOB

Pre-Job Planning

Drilling plan review, BHA design, mud program, casing schedule, surface equipment list. Cost estimate locked at AFE approval.

02RIG MOVE

Rig Move & Rig-Up

Rig transport, anchor pad construction, rig-up, pre-spud safety meeting. Crew briefing covers entire well plan.

03DRILLING

Drilling Operations

24/7 operations. Morning report by 06:00 daily. Real-time dashboards. Geological liaison embedded as needed.

04COMPLETION

Completion & Handoff

Production casing, cement, location restoration, full documentation package. Operator signs off, rig releases.

Real-Time Deployment · Section 05

Where the rigs are right now.

Diamond H rigs work across the San Joaquin, Salinas, and Ventura basins. Eight active. Four available for immediate mobilization.

  • Rig 4. 1,500 HP Triple
    Vertical · Production
    Kern River 12-B DRILLING
    8,400 FT TD
  • Rig 7. 1,000 HP Double
    Directional · Build & Hold
    S. Belridge 33 DRILLING
    6,200 FT TD
  • Rig 11. Workover 250K
    Pull & pump change
    Cymric 22-A ON LOC
    DAY 3 OF 5
  • Rig 14. 600 HP Single
    Vertical · Production
    San Ardo 9 RIG-UP
    SPUD TOMORROW
  • Rig 18. 1,500 HP Triple
    Horizontal · Diatomite
    Lost Hills 7 DRILLING
    11,800 FT TD
  • Rig 22. 800 HP Double
    Available now
    HQ Yard READY
    MOBILIZATION 4 HR
Trusted By · Section 06

Operators we've drilled for.
Some for decades.

Many of these MSAs go back to Walt's handshake era. Our oldest active client first hired us in 1979.

Aera Energy
Since 1989 · 35 yrs
California Resources
Since 2014
Sentinel Peak
Since 2017
Berry Petroleum
Since 1979 · 45 yrs
E&B Natural Resources
Since 1996
Crimson Resource
Since 2008
Macpherson Oil
Since 1992
Vintage Production
Since 2001
Diamond H has spudded thirty-one wells for us across two basins since 2016. Zero recordable incidents. The morning report hits my inbox at 5:55 a.m. like clockwork.
OPERATORAera Energy
NAMEMarcus Webb
TITLEDrilling Superintendent
REFERENCESince 2016
24 / 7 Dispatch

Need a rig?
Call us before
the AFE.

Pre-AFE consultation is free. We'll review your well plan, BHA design, and cost estimate before you finalize the AFE. Often saves $100k+ on the back end.

(661) 327·2500
Request a Quote
Available · 4 Rigs

Got a hole
that needs
turning?

Four rigs available for immediate mobilization. Workover, single, double, or triple. We can be rig-up at your location within 96 hours of contract signing.

Mobilize a Rig View Capabilities

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