Applications
- Bottom-hole assembly configuration
- Connection and diameter transitions
- Directional control, stabilization and drilling-tool integration
DRILL STRING & BHA
Subs, Crossovers & Stabilizers
Machined BHA components configured around load transfer, connection transitions, stabilization and drilling-tool interfaces.
StandardAPI 7-1 where applicable · API 7-2 connection references
Size / supply rangeDimensions and flow bore by controlled drawing · Pin-pin, box-box and pin-box arrangements
Grades / materialsAISI 4145H Modified typical alloy-steel route · Non-magnetic and corrosion-resistant materials subject to function
Connections / optionsAPI rotary-shouldered connections · Selected proprietary connections
TECHNICAL PROCUREMENT
Define subs, crossovers & stabilizers around the operating requirement.
Availability and final supply scope are confirmed after technical review. OAK PIPE coordinates the product configuration, manufacturing route, inspection requirements and delivery package against the enquiry.
Configuration options
- Crossovers, bit subs, lifting subs and saver subs
- Integral or sleeve stabilizers and replaceable-blade configurations
- Customer-drawing and non-standard connection components
Quality & documentation
- Material, heat-treatment and mechanical-property verification
- Critical dimensions, connection gauging and NDT
- Hardfacing, blade geometry and final identification records
PROCUREMENT BASIS
Technical scope at a glance.
This summary supports preliminary comparison. Final dimensions, tolerances, availability and acceptance requirements are confirmed against the enquiry and governing purchase documents.
| Reference basis | API Spec 7-1 / ISO 10424-1, API 7-2 / ISO 10424-2, purchaser drawings and agreed acceptance criteria |
|---|---|
| Product configuration | Crossovers, bit subs, lifting subs and saver subs · Integral or sleeve stabilizers and replaceable-blade configurations · Customer-drawing and non-standard connection components |
| Verification basis | Material, heat-treatment and mechanical-property verification · Critical dimensions, connection gauging and NDT · Hardfacing, blade geometry and final identification records |
| Commercial confirmation | Size or drawing · Material / grade · Quantity · Service conditions · Inspection scope · Destination and schedule |
The purchase order, approved drawings and agreed specification take precedence over this website summary.
RFQ CHECKLIST
Information to include with your enquiry.
A clear starting specification allows faster technical review and a more accurate commercial response.
Prepare Your RFQ- 01Component name, drawing and quantity
- 02OD, ID, length and upper/lower connections
- 03Material, load and service requirements
- 04Hardfacing, NDT, inspection and documentation scope
PRODUCT OVERVIEW
Subs, Crossovers & Stabilizers for project-specific requirements.
Subs, crossovers and stabilizers connect drilling tools, transition between rotary-shouldered connections and control bottom-hole assembly geometry. Each component is defined by its function, load path, OD, ID, overall length, connection at both ends, material, heat treatment and any blades, hardfacing or flow features.
API 7-1 provides the principal reference for covered rotary drill-stem elements such as drill-stem subs, while API 7-2 governs applicable rotary-shouldered connection threading and gauging. Stabilizers and special crossover components may also require customer drawings and project-specific acceptance criteria.
OAK coordinates controlled drawings, material traceability, machining, connection verification, NDT, dimensional inspection and component-specific wear protection.
TECHNICAL SCOPE
Supply basis at a glance.
Use this overview to prepare an enquiry. The final size, grade, connection and inspection combination is confirmed against the governing specification.
| Technical field | Available or review basis |
|---|---|
| Standards | API 7-1 where applicable · API 7-2 connection references · Customer BHA drawing and specification |
| Size & supply range | Dimensions and flow bore by controlled drawing · Pin-pin, box-box and pin-box arrangements · Integral or replaceable stabilizer configurations |
| Grades & materials | AISI 4145H Modified typical alloy-steel route · Non-magnetic and corrosion-resistant materials subject to function |
| Connections & options | API rotary-shouldered connections · Selected proprietary connections · Different upper and lower connection combinations |
PRODUCT PARAMETERS
Recorded product specifications.
The values below come from the maintained OAK product record. Contract dimensions, tolerances and acceptance criteria remain subject to final order review.
| Parameter | Specification / value |
|---|---|
| Reference standards | API 7-1, API 7-2 and approved BHA drawings |
| Product range | Subs, crossovers, lift subs, bit subs and stabilizing components |
| Definition | OD, ID, length, both connections, material and functional features |
APPLICATIONS
Where this product is used.
- BHA connection transitions
- Bit and tool interfaces
- Stabilization and gauge control
- Fishing, lifting and handling interfaces
SERVICE & SELECTION
Conditions considered during selection.
- Combined torque, axial load and bending
- High contact and abrasive wear
- Fatigue-sensitive connection transitions
- Magnetic or corrosive service where applicable
MANUFACTURING
Controlled production route.
Key operations are coordinated against the product specification and order requirements.
01Drawing and revision control
02Material verification and heat treatment
03Boring, turning and milling
04Connection machining and surface treatment
05Blade hardfacing where specified
INSPECTION & TESTING
Verification before release.
- Mechanical-property and hardness review
- UT, MT or PT as specified
- Dimensional and bore inspection
- Connection gauging
- Blade, hardfacing and surface inspection
QUALITY DOCUMENTS
Evidence supplied with the order.
- Approved drawing
- MTC and heat-treatment records
- NDT reports
- Dimensional and connection report
- Certificate of conformity
PACKING & DELIVERY
Prepared for the destination and handling plan.
Marking, protection and shipment details are confirmed during order review.
Connection protection
Individual identification
Heavy-component handling and export packing
RFQ CHECKLIST
Information needed for a practical quotation.
Share the available technical and commercial requirements. Missing details can be reviewed with our team.
Request a Quote- 01Component type and function
- 02Controlled drawing or OD, ID and length
- 03Upper and lower connections
- 04Material, loads and service environment
- 05Hardfacing, NDT, documentation and quantity
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.