Crossovers & Subs
Components used to transition between different connection types, sizes or adjacent drill-string elements.
DRILL STRING PRODUCTS
Drill String Accessories
Complementary drill string components configured around assembly, connection and operating requirements.
StandardAPI 7-1 where applicable · API 7-2 connection references
Size / supply rangeItem-specific dimensions · Standard and custom interface combinations
Grades / materialsAlloy-steel materials matched to drill-string duty · Non-magnetic or corrosion-resistant options subject to application
Connections / optionsAPI rotary-shouldered connections · Selected proprietary connections
DRILL STRING & BHA COMPONENTS
Drill String Accessories configured around the complete order.
Drill string accessories connect, adapt and stabilize components within the working string and bottom-hole assembly. Geometry, connection compatibility, material, loading and inspection must be reviewed as part of the complete assembly.
SUPPLY OVERVIEW
Typical drill string accessories specification fields.
Use this table to prepare an initial enquiry. Final combinations, tolerances and acceptance criteria are confirmed during technical review.
| Typical scope | Subs · Crossovers · Bit subs · Lift subs · Stabilizer-related and drawing-based components |
|---|---|
| Product definition | Component drawing, OD, ID, overall length and functional position in the assembly |
| Connections | Complete upper and lower rotary-shouldered connection designation |
| Material | Alloy-steel or order-specific material with required heat treatment and properties |
| Machining options | Stress-relief features, cold rolling, surface treatment and hardbanding as specified |
| Supply format | Individual components or coordinated with drill pipe, HWDP and drill collars |
PRODUCT CONFIGURATION
Options organized around the application.
The listed configurations are procurement pathways, not automatic statements of availability.
Bit & Lift Subs
Application-specific subs reviewed for connection, handling, load transfer and assembly position.
Stabilizing Components
Selected stabilizer and wear-control components configured around BHA geometry and well trajectory.
Drawing-Based Tools
Machined components evaluated from controlled drawings, materials and acceptance criteria.
TYPICAL APPLICATIONS
Where the product fits.
Selection remains subject to the design authority, operating conditions and governing specification.
Connection Transition
Join drill-stem components with different rotary-shouldered connections or bore requirements.
BHA Configuration
Position and connect collars, motors, measurement tools, stabilizers and bit assemblies.
Handling & Assembly
Support lifting, make-up and component integration according to the drilling program.
QUALITY & DOCUMENTATION
Verification aligned with the agreed order.
The applicable tests, inspection points and document package are fixed before manufacturing release.
01Drawing and specification review
02Material identity and heat-treatment records
03OD, ID, length and critical-feature inspection
04Pin and box connection gauging
05NDT, hardness and surface verification as ordered
06Marking, protectors and traceability dossier
DRILL STRING ACCESSORIES RFQ CHECKLIST
Send the complete product and service requirement.
These inputs allow OAK PIPE to organize a technically meaningful and commercially comparable response.
Request a Technical Quote- 01Component name, function and quantity
- 02Controlled drawing or complete dimensional schedule
- 03Upper and lower connection designation
- 04Material and mechanical-property requirements
- 05Operating loads and service environment
- 06NDT, thread treatment, hardbanding and documents
PRODUCT & PROCESS VIEWS
Product views and manufacturing context.
Representative product, production and inventory views support preliminary identification. Final supply details are confirmed against the quotation.
START A CONVERSATION
Have a specification or product list?
Send it to OAK PIPE for technical and commercial review.