Internal Evidence Review / 21 August 2026

HWO Control Mechanisms

A claim-by-claim tie-breaker for the seven annotated control groups on the proposed Halliburton hydraulic-workover operator panel. The August 19 subject-matter-expert call is the controlling source; Slack recollections and public technical references are corroboration only.

7Groups adjudicated
2Confirmed as drawn
1Partially confirmed
4Require correction

Bottom Line

Dave’s diagram is functionally right for groups 1 and 7, partly right for group 2, and should be corrected for groups 3–6. Devin correctly remembered the springs on group 3 and the legacy three-position history on group 7, but the call does not support “three detents” for group 1, spring-centering for group 6, or continuous rotation for the pressure dials. [F1] [S1]

Diagram Under Review

Annotated Halliburton HWO operator control panel with seven numbered control groups
Provided annotated image. The report adjudicates mechanisms and control behavior; it does not certify exact OEM part numbers.

Verdicts

1
Confirmed

Spring-centered, single-axis controls

Use three positions, not “three detents.” The Gin Pole and Power Tong controls are single-axis, spring-to-center, three-position/four-way valves. The Rig Direction lever is the same spring-centered valve pattern and controls traveling-head raise/lower. The call never assigns detents to these three.

“Both of those should be spring to center. Single axis.” — Jeremy Lawrence, 25:31–25:34. “They’re three position four way spring return hydraulic valves.” — 27:13–27:14. Rig Direction: “standard three position four way valve.” — 40:15–40:29. [F1]

Label correction: the call names the upper pair “Gin Pole” and “Power Tong,” not “Tong Swing.” Confirm whether the simulator intentionally uses a legacy label before final art.

2
Partial

Engine throttle

Keep the lever; describe it as a proportional pneumatic pressure-regulator control. The call confirms down reduces pressure/RPM and up-forward increases pressure/RPM. It does not explicitly confirm a friction pack, a detent pattern, or “stays where you put it.” Devin’s Slack note accepts the drawing but speculates that the hidden mechanism “might be a dial”; the call is more specific: it is a pneumatic pressure regulator operated by the lever.

“The Engine throttle is a pneumatic pressure regulator.” — 30:05–30:19. “As you move it up and forward, it increases pressure to change the engine speed.” — 30:23–31:07. [F1] Devin’s follow-up: “2—correct, but… the internal mechanism might be a dial.” [S1]

Open proof gap: obtain the OEM datasheet or inspect the console before specifying friction/no-detent feel.

3
Corrected

Engine kill controls

These are spring-offset, two-position, three-way pneumatic pull valves—not detented push buttons. Both sit down in the stowed state; pulling up sends the pneumatic signal. Regular Kill cuts fuel; Emergency Kill cuts fuel and engine intake air.

“Those are three way pneumatic valves and they are spring offset to a stowed position. So it’s a two position operation. And when you pull up on them, it sends a signal.” — 27:46–28:10. “Emergency kill is fuel and air and regular kill is fuel only.” — 29:05–29:07. [F1]

Devin’s memory that these “had springs” is correct; Dave’s “detents up/down” mechanism is not. [S1]

4
Corrected

Pressure-adjust dials

They do not spin continuously. The red pressure-adjust controls are screw-adjust regulators that rotate roughly three to five full turns across their range and stop at the limit. Jeremy flagged the exact turn count for verification, so “3–5 turns” is provisional while “not continuous” is confirmed.

“Do they rotate continuously or is there a stopping point?” — Devin, 53:49. Jeremy: “I’ll have to verify that… They rotate three to five times, full 360.” Devin: “They have a hard stop at their minimum range. They don’t just keep going.” Jeremy: “Correct.” — 53:49–54:16. [F1]
5
Corrected

Blue-handled selectors

Call them two-position binary rotary/toggle selectors, not “detent dials.” The call confirms the blue handles share the same mechanism and behave as left/right binary switches. It does not explicitly establish whether the end positions are held by a detent or only by a physical stop.

“Those with the blue handles are all going to be the same.” — 31:58. Asked whether the mechanism is binary: “It is, yes.” — 32:12–32:15. Devin’s recap: “These are binary left and right switches.” — 43:54–43:59. [F1]

Devin’s “hard stop at each end” is plausible, but it is not directly confirmed in the transcript. [S1]

6
Corrected

Rotary direction lever

Neither side of the thread has it right. This lever has a mechanical center detent, then friction-retained proportional travel in forward and reverse. It can remain anywhere along the stroke to command partial rotary speed. It is not spring-centered and it does not have three discrete detents.

“It has a mechanical detent in the center position and then friction detent in forward and reverse directions.” — 39:15–39:32. Asked whether it can stop anywhere: “It can stop at any point along the way… maybe they don’t want to run the rotary at full speed.” — 39:35–40:10. [F1]

Dave’s “three detented” label and Devin’s “spring to center and single detente” recollection both conflict with the primary evidence. [S1]

7
Confirmed

Traveling and stationary slip levers

Specify two-position detented behavior: Open or Closed. Older/first-iteration hardware used a three-position detent, and the lever can physically pause in the center, but Jeremy states the current design was upgraded to two-position detents and operators should not use center.

“There’s supposed to be two position detented.” — 33:28. “Our first iterations… added a three-position detent, but we’ve since upgraded those to two position detents.” — 36:44–36:57. “It should either be open or it’s closed… more of a digital function.” — 37:12–37:25. [F1]

Dave’s functional classification wins. Devin’s legacy three-position note is useful history, not the evidence-led default for new hardware. [S1]

Recommended Specification Language

Decision-ready wording

  1. 3 × single-axis, three-position, spring-centered controls: Gin Pole, Power Tong, Rig Direction / traveling-head raise-lower.
  2. 1 × proportional engine-throttle lever: pneumatic pressure-regulator behavior; holding force/detent profile pending OEM data or inspection.
  3. 2 × two-position, spring-offset pneumatic pull controls: Engine Kill and Emergency Engine Kill.
  4. 4 × multi-turn pressure-adjust screw controls: approximately 3–5 turns across range; non-continuous; exact travel pending OEM verification.
  5. 2 × binary rotary selectors: left/right end states; exact detent/stop feel pending OEM verification.
  6. 1 × rotary-direction lever: mechanical center detent plus friction-retained proportional travel in either direction.
  7. 2 × slip levers: two-position detented Open/Closed behavior; do not make center a valid operating state.

Evidence Hierarchy

Internal / Controlling

  • August 19 controls meeting with Jeremy Lawrence: direct, control-by-control mechanism review.
  • Current Slack disagreement: useful for identifying the disputed claims, not for overriding the call.
  • Earlier console inventory: confirms project scope and legacy latch/detent history.

External / Context Only

  • Halliburton’s public HWO page establishes the equipment domain and safety-critical pipe-handling context, but does not expose console-component specifications. [E1]
  • Hydraulic training references distinguish “three positions” from “detents” and explain spring-centering; they validate the terminology used above, not the specific Halliburton parts. [E2]
  • No public OEM sheet found for these exact console controls. That gap remains real until Jeremy’s promised supplier/part sheet arrives.

Sources

F1 / PRIMARY INTERNAL Halliburton Simulator Controls Integration

19 August 2026 · 57-minute Fireflies transcript · 933 sentence records fetched and searched in full. Open Fireflies transcript.

S1 / INTERNAL Current Slack tie-breaker thread

21 August 2026 · Dave’s annotated image, Devin’s remembered corrections, and Adam’s research request. Open Slack thread.

S2 / INTERNAL Console inventory and legacy retention-latch note

30 July 2026 · Devin identifies return-to-center levers, binary levers, dials, switches, buttons, and the legacy detent-versus-latch distinction. Open Slack message.

E1 / EXTERNAL OFFICIAL Halliburton — Hydraulic workover and snubbing

Official overview of Halliburton HWO systems and SafeGrip pipe handling. Open source.

E2 / EXTERNAL TECHNICAL Northeast Wisconsin Technical College — 4/3 directional control valves

Explains that “three-position” identifies spool positions and that spring-centered valves return to neutral when force is released. Open source.