Description
Spiral Drill Collar With Slip and Elevator Recess
API 7-1 Spiral Grooved Drill Collar for Oilfield Drilling and BHA Applications
SGPE supplies Spiral Drill Collar With Slip and Elevator Recess for oilfield drilling projects that require stable BHA performance, safer wellsite handling, and lower differential sticking risk. This field-ready drill collar combines spiral grooving, slip recess, elevator recess, stress relief groove, bore back box, and hardbanding protection.
During oil well drilling, the bottom hole assembly needs enough weight on bit, strong stiffness, and reliable control in the wellbore. SGPE spiral drill collars support onshore wells, offshore wells, deep wells, directional wells, horizontal wells, and high-pressure formations.
We manufacture API drill collars, spiral grooved drill collars, slick drill collars, hardbanded drill collars, slip recess drill collars, elevator recess drill collars, and BHA drilling tools according to customer drawings, drilling programs, and field operating requirements.
Send us your OD, ID, length, connection type, quantity, and hardbanding requirement to receive a fast quotation.
Product Overview
The SGPE Spiral Drill Collar With Slip and Elevator Recess helps the bottom hole assembly deliver stable weight, better tool control, and safer rig handling. It works well in drilling programs that expose drill stem tools to torque, axial load, bending stress, and downhole vibration.
The spiral grooves reduce contact between the drill collar and the wellbore wall. This feature helps crews lower differential pressure sticking risk in deviated wells, deep oil wells, high-pressure formations, and wells with complex drilling fluid systems.
The slip and elevator recesses give rig crews clear handling areas for slips and elevators. These machined sections reduce body damage, improve lifting safety, and make running or tripping operations more efficient. We machine the recesses in accordance with API 7-1 requirements.
For harsh downhole service, we can add API stress relief groove pin, stress relief groove box, bore back box, and hardbanding protection. These features protect critical connection areas and help extend service life during repeated drilling operations.
Key Benefits
Lower Differential Sticking Risk
The spiral-grooved body reduces wall contact and helps drilling fluid move around the collar more smoothly. This structure supports better anti-sticking performance in deep, deviated, and high-pressure oil wells.
Stable BHA Performance
Drill collars provide weight on bit and stiffness for the bottom hole assembly. SGPE spiral drill collars keep the required mass while improving tool behavior in demanding wellbore conditions.
Safer Wellsite Handling
Slip recess and elevator recess areas help crews position slips and elevators accurately. This improves handling safety, reduces surface damage, and supports faster rig operations.
Stronger Connection Protection
Stress relief grooves and bore back box design reduce stress concentration around pin and box connections. These features improve bending fatigue resistance and help extend connection life.
Longer Wear Life
Hardbanding materials such as Arnco-100xT, Arnco-300xT, and TCS-8000 protect high-contact areas during drilling, tripping, and repeated field handling.
Flexible Custom Manufacturing
We can customize OD, ID, length, connection type, groove size, recess design, hardbanding layout, and product marking according to customer drawings and drilling requirements.
Main Product Features
Spiral Grooving
Spiral grooving helps reduce differential pressure sticking by lowering contact between the drill collar and the wellbore wall. Compared with slick drill collars, spiral grooving usually reduces tool weight by about 4%, while the collar still keeps most of its required weight for BHA performance.
The spiral section also allows future connection reconditioning. This helps customers reduce replacement cost and extend drill collar service life.
In deep wells, deviated wells, and high-pressure formations, the grooves help drilling fluid move around the tool body more effectively. At the same time, the collar maintains enough weight for bottom hole assembly control while reducing wall contact in challenging wellbore conditions.
Slip and Elevator Recess
Slip and elevator recesses improve rig floor handling safety and efficiency. We machine these recesses in accordance with API 7-1, so the drill collar can match common wellsite handling practices.
The recess design helps rig crews position slips and elevators correctly during lifting, running, tripping, and setting operations. It also reduces surface damage caused by repeated gripping and handling. For heavy oilfield drilling tools, this feature gives crews better control and improves operational safety.
Stress Relief Groove and Bore Back Box
Oilfield drill collars face torque, axial load, bending stress, vibration, and repeated connection loading. Stress relief groove and bore back box designs help improve connection durability under these demanding conditions.
Stress relief grooves increase bending strength at the pin and box areas. API defines groove forms for both pin and box connections. This design helps the drill collar handle repeated bending and dynamic drilling loads.
A bore back box uses a gradual internal diameter transition inside the box connection area. This structure increases the material cross-sectional area at the critical section and reduces stress concentration during static and dynamic loading. It also helps reduce the risk of premature box connection failure in harsh downhole service.
Large radii distribute stress more smoothly. Together, the stress relief groove and bore back box improve bending fatigue resistance under torque, axial load, and downhole vibration.
Hardbanding Options
SGPE provides hardbanding protection for drill collars used in abrasive formations and high-contact drilling conditions. Customers can choose suitable hardbanding materials according to casing wear control requirements, drilling fluid system, formation abrasiveness, operating temperature, and expected service life.
For different drilling applications, we can provide Arnco-100xT, Arnco-300xT, and TCS-8000 hardbanding options. These materials protect the drill collar body from wear during drilling, tripping, and repeated rig handling.
The hardbanding surface remains smooth and free of sharp tool marks. This finish improves flexibility and helps reduce cracking risk during bending. With a proper hardbanding layout, the collar can protect high-contact areas more effectively and lower maintenance costs throughout its service life.
Recommended Hardbanding Location
We can arrange hardbanding according to customer drawings, field service conditions, and drilling program requirements.
For drill collars with both slip recess and elevator recess, SGPE usually recommends a 4-inch wear pad above the elevator recess, a 1-inch wear pad above the slip recess, and a 10-inch wear pad under the slip recess.
For drill collars with slip recess only, we usually recommend a 10-inch wear pad under the slip recess and a 4-inch wear pad above the slip recess. This layout protects the main contact areas around the slip recess during drilling, tripping, and repeated rig handling.
For drill collars without slip recess and elevator recess, we usually recommend a 10-inch wear pad around 30 inches from the pin shoulder. This position protects the high-contact area of the collar body during field operations.
The final hardbanding position should follow the confirmed technical drawing, drilling program, and customer field requirements.
Specification for Spiral Grooved Drill Collars
The following table shows common sizes for spiral grooved drill collars. SGPE can also manufacture customized sizes according to purchase orders, drawings, and oilfield drilling requirements.
| OD | 4-3/4” | 6-1/4” | 6-3/4” | 7-1/4” | 7-1/2” | 8” | 9-1/2” | 10” | 11” |
|---|---|---|---|---|---|---|---|---|---|
| Depth of Cut | 7/32” | 9/32” | 5/16” | 11/32” | 11/32” | 3/8” | 13/32” | 7/16” | 15/32” |
| Tolerance | ±1/32” | ±1/16” | ±1/16” | ±1/16” | ±1/16” | ±1/16” | ±3/32” | ±3/32” | ±3/32” |
| Spiral Pitch | 38” | 42” | 46” | 64” | 64” | 68” | 72” | 76” | 80” |
| Pitch Tolerance | ±1” | ±2” | ±3” | ±4” | ±5” | ±6” | ±7” | ±8” | ±9” |
Note: Please confirm final dimensions, groove form, connection type, recess position, and hardbanding layout through the technical drawing and purchase order.
Custom Manufacturing Options
SGPE can customize spiral drill collars according to customer drawings, technical specifications, well conditions, and drilling program requirements. We can manufacture the drill collar with the required outside diameter, inside diameter, bore size, total length, and connection type.
We can also adjust the spiral groove size, slip recess design, elevator recess design, stress relief groove, and bore back box according to confirmed technical requirements. For wear protection and field identification, we can provide suitable hardbanding material, hardbanding location, thread protectors, product marking, and export packaging.
Customers can send drawings, required specifications, well conditions, or drilling program details. Our team will review the information and provide a suitable manufacturing proposal for the project.
Oilfield Application Environments
SGPE Spiral Drill Collar With Slip and Elevator Recess works well in onshore oil well drilling, offshore oil well drilling, deep well drilling, directional drilling, and horizontal drilling. It also suits high-pressure formations, deviated wells with sticking risk, and wells that use complex drilling fluid systems.
This drill collar supports bottom hole assembly weight control and fits projects that require API 7-1 drill collars. It also performs well in operations that involve frequent tripping, repeated rig handling, and demanding downhole conditions.
Oil drilling contractors, oilfield service companies, BHA tool rental companies, drilling tool distributors, and procurement teams can use this product for new tool supply, replacement orders, and long-term drilling tool programs.
Quality Control and Inspection
SGPE controls each key manufacturing and inspection step to help customers receive stable, durable, and field-ready oilfield drill collars. During production, we check the main dimensions, inspect the threads, verify the spiral groove machining quality, and review the slip recess and elevator recess areas according to the confirmed drawings and order requirements.
Before shipment, we inspect the hardbanding surface, overall appearance, connection protection areas, final product marking, and packaging condition. Since drill collars work under high torque, heavy axial load, bending stress, and downhole vibration, we pay close attention to every machined area that may affect tool life, connection strength, and drilling safety.
Available Documents Upon Request
SGPE can provide order documents according to customer requirements and purchase order terms. Depending on the project needs, we can prepare material certificates, dimensional inspection reports, thread inspection reports, hardbanding inspection records, packing lists, commercial invoices, and certificates of conformance when required.
If the order requires additional project documents, our team can prepare them according to the confirmed purchase order and customer specifications. These documents help procurement teams, drilling contractors, and tool distributors manage quality records, shipment details, and delivery acceptance more efficiently.
Packaging and Delivery
SGPE packs each drill collar with thread protectors on both ends to help protect the connections during storage and transportation. We also apply rust prevention treatment according to order requirements, so the product can better withstand long-distance shipping and changing transport conditions.
For safer handling, we can use steel frame or wooden support packaging options. We also add clear product marking, prepare export-ready packaging, and provide order documents according to customer requirements.
SGPE supports international delivery for oilfield drilling projects, tool distributors, and procurement companies.
Why Choose SGPE as Your Oilfield Drill Collar Supplier?
SGPE supplies oilfield drilling tools for demanding drilling operations. Customers choose us because they need stable machining quality, practical tool design, fast communication, competitive pricing, and reliable export service.
We support your project with API 7-1 drill collar machining capability, stable spiral grooved drill collar supply, precise slip and elevator recess machining, and reliable hardbanding options for wear protection.
Our team also provides custom drill collar design support and technical review based on customer drawings or specifications. For bulk orders, we offer responsive quotation support, suitable packaging solutions, and export service for international delivery.
Whether you need a sample order, a replacement drill collar, or a long-term oilfield tool supply program, SGPE can help you choose the right drill collar configuration for your drilling project.
Information Needed for Quotation
To receive an accurate quotation, please send us your required outside diameter, inside diameter or bore size, total length, connection type, and order quantity. Please also include your spiral groove requirement, slip and elevator recess requirement, and preferred hardbanding material and location.
If you already have a technical drawing, inspection document requirement, destination port, or delivery address, please send these details together with your inquiry. Our team will review your specifications carefully and provide a suitable quotation for your oilfield drilling project.
FAQ About Spiral Drill Collar
1. What is a Spiral Drill Collar With Slip and Elevator Recess?
A Spiral Drill Collar With Slip and Elevator Recess is a heavy-duty oilfield drilling tool used in the bottom hole assembly. It provides weight on bit, improves BHA stiffness, and helps the drilling crew control tool movement in the wellbore.
The spiral grooves reduce contact between the drill collar and the wellbore wall. This helps lower differential sticking risk in deep oil wells, deviated wells, directional wells, and high-pressure formations. The slip and elevator recesses also give rig crews clear handling areas during lifting, running, tripping, and setting operations.
2. Why do drilling projects use spiral grooved drill collars?
Drilling projects use spiral grooved drill collars to reduce differential pressure sticking and improve drilling fluid movement around the tool body. The spiral grooves help drilling mud flow more easily along the collar surface, which can reduce wall contact and improve downhole performance.
This design works well in wells with high differential pressure, complex drilling fluid systems, long open-hole sections, or higher sticking risk. Compared with a slick drill collar, a spiral drill collar keeps most of the required tool weight while improving anti-sticking performance.
3. What is the difference between a spiral drill collar and a slick drill collar?
A slick drill collar has a smooth outside surface. It provides weight and stiffness for the BHA, but it has a larger contact area with the wellbore wall.
A spiral drill collar has spiral grooves machined on the outside surface. These grooves reduce wall contact and help drilling fluid circulate around the tool. Drilling crews often choose spiral grooved drill collars for deviated wellbores, deep drilling sections, high-pressure formations, and oil wells with differential sticking risk.
Spiral grooving usually reduces drill collar weight by about 4% compared with a slick drill collar, but the tool still keeps enough mass for bottom hole assembly performance.
4. Why are slip and elevator recesses important on a drill collar?
Slip and elevator recesses help rig crews handle the drill collar more safely and efficiently. The recesses provide clear areas for slips and elevators, so workers can grip, lift, lower, and set the tool with better control.
A drill collar with slip and elevator recess can reduce handling damage on the body surface and support smoother tripping operations. This design also improves safety on the rig floor when crews handle heavy oilfield drilling tools during frequent running and pulling operations.
SGPE machines slip and elevator recesses in accordance with API 7-1 requirements.
5. What does API 7-1 mean for this drill collar?
API 7-1 covers important requirements for rotary drill stem elements used in drilling operations. For this product, API 7-1 relates to key features such as drill collar dimensions, connection-related requirements, and slip and elevator recess machining.
When customers request an API 7-1 drill collar, SGPE reviews the required OD, ID, length, connection type, recess design, and related specifications before manufacturing. This helps the product match common oilfield drilling equipment, rig handling procedures, and project requirements.
6. How does a stress relief groove improve drill collar connection life?
A stress relief groove helps reduce stress concentration around the pin and box connection areas. During drilling, the drill collar faces torque, bending load, axial load, vibration, and repeated connection stress. These forces can shorten connection life if the design does not manage stress properly.
SGPE can provide API stress relief groove pin and stress relief groove box designs to improve bending fatigue resistance. This feature protects critical connection areas and supports longer service life in demanding downhole drilling conditions.
7. What is a bore back box on a drill collar?
A bore back box uses a gradual internal diameter transition inside the box connection area. This design increases the material cross-sectional area at the critical section and helps reduce stress concentration during static and dynamic loading.
In harsh drilling environments, the box connection often faces bending, vibration, and repeated makeup stress. A bore back box helps improve connection durability and reduces the risk of premature box failure. Customers often choose this feature for deep wells, directional wells, high-load drilling programs, and long service intervals.
8. What hardbanding options does SGPE provide for spiral drill collars?
SGPE provides several hardbanding options for spiral drill collars, including Arnco-100xT, Arnco-300xT, and TCS-8000. Customers can choose the hardbanding material according to drilling conditions, casing wear control needs, formation abrasiveness, drilling fluid system, and service plan.
Hardbanding protects high-contact areas during drilling, tripping, and repeated rig handling. A smooth hardbanding surface also helps reduce cracking risk during bending and supports better wear resistance in long field service.
9. Where should hardbanding be placed on drill collars with slip and elevator recesses?
For a drill collar with slip and elevator recesses, SGPE commonly recommends a 4-inch wear pad above the elevator recess, a 1-inch wear pad above the slip recess, and a 10-inch wear pad under the slip recess.
For a drill collar with slip recess only, SGPE often recommends a 10-inch wear pad under the slip recess and a 4-inch wear pad above the slip recess. For drill collars without slip and elevator recesses, SGPE can place a 10-inch wear pad around 30 inches from the pin shoulder.
Final hardbanding location should follow the confirmed drawing, drilling program, and customer field requirements.
10. Can SGPE manufacture custom spiral drill collars for oilfield drilling projects?
Yes. SGPE can manufacture custom spiral drill collars according to customer drawings, technical specifications, and oilfield drilling requirements.
Custom options include outside diameter, inside diameter, bore size, total length, connection type, spiral groove size, slip recess design, elevator recess design, stress relief groove, bore back box, hardbanding material, hardbanding location, product marking, thread protector, and export packaging.
Customers can send drawings, well conditions, drilling program details, or purchase specifications. SGPE will review the requirements and provide a suitable manufacturing proposal.
11. What information should I provide to request a quotation?
To receive an accurate quotation for a Spiral Drill Collar With Slip and Elevator Recess, please provide the required outside diameter, inside diameter or bore size, total length, connection type, quantity, spiral groove requirement, slip and elevator recess requirement, hardbanding material, hardbanding location, and technical drawing if available.
You can also share the target application, such as onshore oil well drilling, offshore oil well drilling, deep well drilling, directional drilling, horizontal drilling, or high-pressure formation drilling. These details help SGPE recommend a more suitable drill collar configuration.
12. Why choose SGPE as your spiral drill collar supplier?
SGPE supplies oilfield drilling tools for drilling contractors, oilfield service companies, BHA rental companies, drilling tool distributors, and procurement teams. We support customers with API 7-1 drill collar machining, spiral grooving, slip and elevator recess machining, stress relief groove, bore back box, hardbanding, inspection, marking, and export packaging.
SGPE focuses on practical field performance, stable machining quality, fast communication, and reliable delivery. Whether you need a sample order, replacement drill collars, or a long-term bulk supply program, SGPE can help you select and manufacture the right drill collar for your drilling project.
Request a Quote
Looking for a reliable Spiral Drill Collar With Slip and Elevator Recess supplier for your oilfield drilling project?
Send SGPE your required OD, ID, length, connection type, quantity, hardbanding requirement, and technical drawing. Our team will provide a fast quotation and a practical manufacturing recommendation for your application.
E-Mail:
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