TL;DR — Check the cartridge rating and the indicator function separately
A Blak-JAK washpipe cartridge and its Pressure Indicator Light answer different questions. NOV describes a self-contained cartridge assembly and a light associated with washpipe-packing deterioration. The light's presence does not establish the installed cartridge's working-pressure rating, approve an upgrade, or provide a guaranteed remaining service period. Match the actual cartridge and indicator references to their applicable documents. NOV brochure, PDF page 11, printed page 7.
Scope — Which source and equipment are covered?
This article covers the separate Blak-JAK Washpipe Cartridge System and Blak-JAK Pressure Indicator Light descriptions in Mission Drilling Solutions, D352004107-MKT-001 Rev. 02. Source checked on October 17, 2026, Los Angeles time. Its 2015 copyright and general-information, not-design purpose are recorded on the final page. The current revision and applicability to a particular swivel, top drive or cartridge remain unresolved. NOV document footer, PDF page 24.
This is an equipment-document review, not a repacking, installation, pressure-test or operating procedure. The record fields below are editorial suggestions. No assembly part number, seal combination, temperature limit, tightening value, permitted operating interval or return-to-service approval is supplied here.
What is the cartridge's role in the source description?
The source describes a self-contained unit intended for repacking on the rig floor rather than at the swivel. That describes the cartridge concept; it does not identify the installed swivel connection or turn a general brochure into the instructions for a particular unit. NOV brochure, PDF page 11.
The same description block mentions standard packing and washpipe, with a high-temperature-resistant packing option. It gives no temperature limit or specific material and component combination for that option. Do not treat the word standard as proof that a seal from another assembly is compatible, or assume that an optional packing arrangement is already fitted. Record the assembly identity and request its applicable component list.
What do the 5000 psi and 7500 psi references establish?
They establish two working-pressure offerings in the brochure, not the rating of an unidentified installation. The cartridge bullet lists 5000 psi and 7500 psi. The photographs separately caption an original 5000 psi system and a 7500 cartridge with the indicator mounted. Keep the captions and the working-pressure statement together. NOV brochure, PDF page 11.
A photographed indicator is not evidence that every cartridge with a light is the illustrated higher-pressure assembly. The page provides no upgrade kit, serial-specific rating record or interchangeability matrix. It also does not establish the working-pressure limit of the entire connected system. For a replacement or proposed pressure-class change, request the identified assembly's approved rating and connection documents; preserve any conflict instead of selecting the larger number from a catalog name.
What can be concluded from the Pressure Indicator Light description?
The source links a strobing light to a stage of packing leakage in the cartridge's lower rotating housing, indicating that the packing needs replacement at the soonest opportunity. It describes a packing-condition warning; this paragraph does not establish a calibrated pressure reading or automatic shutdown function. NOV brochure, PDF page 11.
The brochure also contains warning-time and performance claims. This article does not convert them into a guaranteed maintenance window, packing lifetime, or permission to continue operating. Nor does the brochure establish that an unlit indicator certifies healthy packing. Record an observed indication and the associated equipment reference, then refer the maintenance decision to the applicable equipment instructions and responsible personnel. Do not replace an equipment-specific assessment with a general brochure claim.
Evidence table and document checklist
| Review field | What the source distinguishes | Evidence needed for the actual equipment |
|---|---|---|
| Cartridge identity | A self-contained washpipe cartridge concept | Assembly marking, swivel or top-drive reference, drawing and revision |
| Working-pressure offering | Separate 5000 psi and 7500 psi descriptions and image captions | Approved rating and connection documents for the identified assembly |
| Packing option | Standard packing and washpipe with an optional high-temperature-resistant packing arrangement | Applicable component list, material and temperature information |
| Indicator function | A strobing indication associated with packing deterioration | Indicator reference, applicable function instructions and observation record |
- Identify the cartridge, connected equipment and indicator separately; record unreadable or absent identification as unresolved.
- Keep rating evidence separate from the presence, colour or apparent shape of a lamp or cartridge photograph.
- Attach the drawing revision and proposed complete component set; similar catalog names do not prove identical assemblies.
- Where safe and permitted, record the observed indication and its context without interpreting it as a calibrated pressure measurement.
- State whether the enquiry concerns identification, an existing assembly's replacement, a packing option or a proposed pressure-class change. Documentation review alone does not authorize physical work or operation.
FAQ
Does an indicator light make a 5000 psi cartridge a 7500 psi assembly?
No such conversion is established by the brochure. The actual assembly rating and any proposed change require applicable equipment documents.
Is the Pressure Indicator Light a calibrated pressure gauge or shutdown interlock?
The cited paragraph describes a packing-related strobing indication. It does not establish a calibrated gauge or an automatic shutdown function.
Does the brochure's warning-time language guarantee how long packing can remain in service?
No guaranteed service interval is established for the reader's equipment. Do not use a general warning claim as permission to defer an equipment-specific maintenance decision.
Can a high-temperature packing option be selected without a material and temperature reference?
The option is mentioned, but its applicable material combination and temperature limit are not given on this page. Obtain the instructions and component information for the identified assembly.
Sources and related links
- NOV Mission Drilling Solutions — PDF page 11, printed page 7: cartridge, pressure-offering captions and separate indicator description.
- NOV document footer — PDF page 24: document revision, copyright and information-purpose boundary.
- Blak-JAK 5000 psi cartridge catalog entry and 7500 psi cartridge catalog entry: navigation labels only; they do not confirm installed ratings or catalog-part interchangeability.
- Blak-JAK liner-retention device identity: a different assembly family; do not transfer its tension-device description to a washpipe cartridge.
Next step — Provide cartridge and indicator references
For a washpipe-cartridge document enquiry, provide the available assembly markings, connected swivel or top-drive identification, drawing revision, rating evidence and required component list. Identify the indicator and any observed signal separately. Keep missing applicability or conflicting rating documents open for clarification; this review does not approve a retrofit or continued operation.