TL;DR
For NOV JWS-340, separate the pump model from the complete pumping package. The Mobile Rigs brochure names JWS-340 within its pump-unitization description; the stated 185–800 hp range concerns NOV triplex mud-pump unitizations and does not establish a JWS-340-specific rated-power field.
- Keep model identification, package equipment and performance evidence in separate records.
- Preserve the brochure's standard-versus-optional equipment headings.
- Verify the installed package and applicable documents before making an equipment decision.
This guide prepares a package-document inquiry. It does not confirm a particular pump's rated power, flow, pressure, installed accessories or parts compatibility.
Scope: which source supports the JWS-340 reference?
NOV's Mobile Rigs brochure, PDF page 7 names JWS-340 in the Pump Unitization section. The same page also has a broader well-service-pump section and a separate Mathey units section; their statements are not automatically JWS-340 specifications.
The downloaded brochure's last page carries a 2012 copyright and states that it is general information, not for design purposes. Its current equipment applicability and revision have not been established here. The pump directory is a navigation entry; a catalog listing does not resolve a package's identity or configuration. This article does not adopt the existing catalog's numerical specifications.
What does the unitization power range actually describe?
It describes the unitization offering in the cited paragraph. The paragraph discusses triplex mud-pump unitizations between 185 and 800 hp and names JWS-340 as a model in that context. It does not provide a model-specific rating table, speed row or pressure-flow curve for JWS-340. NOV PDF page 7.
Record the range under “source unitization scope”, not under “verified JWS-340 rated power”. Likewise, neither the model's number nor a pressure statement from the neighboring well-service section establishes this unit's performance. Request the applicable pump performance document and power-package identification for the intended configuration.
A package description cannot establish that any two limits occur together, determine continuous-duty capability or approve an operating point. Leave those fields unconfirmed until their own source is available.
How are the pump and power package distinguished?
The brochure describes an electronically controlled engine and transmission on a separate skid in the pump-unitization section. NOV PDF page 7. That is package context; it is not a bill of materials for the specific unit a reader owns.
Identify the pump and the power package separately. A pump nameplate alone cannot verify engine, transmission, controls or the complete package arrangement. Ask for the package drawing and equipment-identification records, then record which documents cover the pump and which cover the driver and transmission. Do not infer a current emission specification, installed engine option or removal procedure from this historical brochure.
Why must standard and optional equipment remain separate?
Because the source places them under different headings. Selected standard-equipment entries include a liner-wash system, a hydraulically driven centrifugal suction-charge pump and a pressure gauge. The optional list includes an auxiliary gear-end lubrication pump for low-speed operation or internal-lube-pump failure. NOV PDF page 7.
The following is an editorial evidence map, not a guaranteed package specification:
| Source category | Example in this brochure | Evidence still needed for the installed package |
|---|---|---|
| Unitization scope | 185–800 hp paragraph naming JWS-340 | Model-specific performance and driver configuration |
| Standard equipment | Liner wash, suction-charge pump and pressure gauge | Applicable package equipment list and identifiers |
| Optional equipment | Auxiliary gear-end lubrication pump | Option record, installed identity and applicable instructions |
A standard list in a brochure does not confirm every item on an older, modified or differently supplied package. An optional entry does not prove that the option is installed, required in every configuration or available today. Do not turn the optional description into a retrofit, bypass or lubrication operating instruction.
Package-document checklist
These are suggested inquiry checks:
- Attach pump identity and available serial information.
- Identify the driver, transmission and package separately when evidence is available.
- Save the original page and exact section heading with each extracted statement.
- Keep offering ranges separate from model-specific performance fields.
- Mark standard, optional and actually observed equipment in distinct fields.
- Request the applicable package drawing, equipment list and option records.
- Request a pump performance sheet for the intended configuration and duty.
- Assign responsibility for unresolved identities, applicability and operating limits.
Do not fill missing fields from another JWS model, neighboring brochure paragraph or an unverified catalog table.
FAQ
Does 185–800 hp establish the JWS-340 rated-power range?
No. It is the cited unitization-offering range. The paragraph does not supply a JWS-340-specific power rating table.
Does the pump model identify the installed engine and transmission?
No. Record pump and power-package identity separately and request the applicable package documents.
Does an optional auxiliary lubrication pump entry prove it is installed?
No. An option description is not an installed-equipment record. Verify its identity and applicable instructions separately.
Can broader well-service-pump pressures be assigned to JWS-340?
No. A neighboring range does not establish this model's performance. Obtain the applicable model and configuration source.
Source and related reading
Source: NOV Mobile Rigs brochure, PDF page 7, with general-information and copyright context on PDF page 12. The scanned original images were inspected on October 12, 2026, Los Angeles time; selected OCR lines were checked against the page before use. No current revision, equipment-specific rating or installed-option record has been established here.
Related reading: JWS-400 pump and parts identification and 14-P-220 configuration-note evidence. Those concern different models. This article addresses the separate JWS-340 task of keeping unitization scope and installed-package evidence apart.
Next step
For a technical document inquiry, send pump identity, available package and driver identifiers, the original section excerpt and the fields still unresolved. Request model performance and package/option documentation as separate deliverables. Confirm applicability before procurement, modification or an operating decision.