TL;DR — Distinguish the tension device from the mechanical retention reference
For a Mission Blak-JAK liner-retention enquiry, record Hydra-CEL and Lok-CEL as separate named elements of the system. NOV describes Hydra-CEL as a hydraulic tension device and Lok-CEL as a tensioned mechanical device, then refers to Lok-CEL body and locking-nut assemblies. Those descriptions identify roles; they do not supply an assembly number, loading value or interchangeable parts list for the installed pump. NOV brochure, PDF page 10, printed page 6.
Scope — Which system and source are covered?
This article concerns the Blak-JAK Liner Retention System paragraph in Mission Drilling Solutions, D352004107-MKT-001 Rev. 02. Source checked on October 16, 2026, Los Angeles time. The brochure carries a 2015 copyright and is general information, not a design document. The current revision and applicability to an individual installation remain unresolved. NOV document footer, PDF page 24.
The checklist below is editorial guidance for documenting an enquiry, not an OEM maintenance instruction. It provides no hydraulic pressure, tension load, torque, release sequence, inspection limit or permission to work on a loaded connection. It also does not identify a complete retrofit kit.
What does the brochure distinguish about Hydra-CEL and Lok-CEL?
Hydra-CEL is the hydraulic tension-device reference; Lok-CEL is described as a tensioned mechanical device. The liner-retention paragraph discusses one Hydra-CEL to maintain rather than individual hydraulic assemblies, and separately describes redesigned Lok-CEL body and locking-nut assemblies developed with NOV fluid-end technology. Keep these descriptions attached to their respective names. NOV brochure, PDF page 10.
The one-device statement concerns the brochure's described arrangement. It does not establish the quantity or configuration on an unidentified pump, or mean that Hydra-CEL alone is a complete liner-retention assembly. Likewise, the mechanical-device description does not give a thread specification, nut orientation or procedure for applying or releasing load. Request those details from the applicable assembly documents.
Does a listed pump brand prove that the system fits?
No. The paragraph refers to equipment for specific pumps from named manufacturers; it does not give a model-by-model or serial-specific application matrix. A manufacturer name on the pump cannot identify the installed fluid end or the required retention parts. NOV brochure, PDF page 10.
For document matching, record the pump model and serial, fluid-end identification, full system marking, and the assembly drawing and revision where available. A drawing reference should identify which named device and component set it covers. If the marking and drawing disagree, keep that discrepancy open rather than choosing a similar-looking assembly. These record fields are editorial recommendations, not a new OEM specification.
Can nearby valve-cover or rod-system statements be transferred?
No. The brochure presents the liner-retention paragraph alongside separate HydrA-LIGN rod-system and Torque Pro valve-cover descriptions. Similar branding and a shared page do not make their assemblies or operating descriptions equivalent. In particular, the Torque Pro Lite statement about hydraulics during pump operation belongs to that valve-cover paragraph, not to the Hydra-CEL/Lok-CEL liner-retention description.
The earlier Type P liner-clamp article concerns a different document's connection and torque-table identification. It is not a Hydra-CEL pressure or Lok-CEL tightening reference. This article also does not turn the adjacent marketing claims about weight, staffing or change-out speed into an installation or purchasing guarantee.
Evidence table and document checklist
| Record field | What the brochure establishes | What to request for the installed assembly |
|---|---|---|
| Hydra-CEL identity | A named hydraulic tension device in the liner-retention description | Device marking, assembly reference and applicable instructions |
| Lok-CEL identity | A tensioned mechanical device; body and locking-nut assemblies are discussed | Body and nut references with drawing revision and component list |
| Equipment scope | Equipment is described for specific pumps from named manufacturers | Pump and fluid-end identity plus documented system applicability |
| Loading or replacement decision | No numeric setting or complete replacement configuration is established by this paragraph | Applicable approved instructions and confirmation for the particular component set |
- Preserve the exact names Hydra-CEL, Lok-CEL and Blak-JAK Liner Retention System in separate record fields.
- Collect visible markings and existing equipment records where safe and permitted; a photograph alone does not establish fitment or condition.
- Attach the drawing identifier, revision and complete proposed parts list to the enquiry.
- Record whether the request concerns identification, replacement within an existing system, or a proposed system change.
- Leave missing settings, assembly references and conflicting documents unresolved until clarified. Document completeness does not certify physical readiness for service.
FAQ
Are Hydra-CEL and Lok-CEL alternative names for the same part?
The brochure assigns different descriptions to them: a hydraulic tension device and a tensioned mechanical device. It does not establish that they are the same part or interchangeable alternatives.
Does the one-Hydra-CEL statement specify every pump's installed quantity?
No. It describes the brochure arrangement and is not an inventory or configuration record for an individual pump.
Can a Type P liner-clamp torque table supply a Lok-CEL setting?
No such transfer is established by the cited sources. Identify the actual assembly and obtain its applicable instructions before selecting a setting.
Does a matching brand or catalog name approve a replacement kit?
No. The installed fluid end, assembly references, revision and complete proposed component set still require equipment-specific confirmation.
Sources and related links
- NOV Mission Drilling Solutions — PDF page 10, printed page 6: the liner-retention paragraph and separate neighbouring systems.
- NOV document footer — PDF page 24: revision, copyright and general-information boundary.
- Mission Blak-JAK liner-retention catalog entry: navigation only; the catalog label does not verify installed Hydra-CEL/Lok-CEL references or part-number applicability.
- Type P liner-clamp document check: separate connection-identification context.
- Torque Pro and Torque Pro Lite scope: valve-cover systems, kept separate from liner retention.
Next step — Send the system and drawing references
For a liner-retention document enquiry, provide the available pump and fluid-end identification, Hydra-CEL/Lok-CEL markings, relevant drawing revision and requested component list. State what is missing or conflicting so the enquiry can seek clarification rather than assume compatibility. This document review does not authorize tensioning, loosening or altering the assembly.