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Spiral Drill Collar
Description
- 产品描述
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Product Overview
The outer surface of the Type B spiral drill collar is machined with right-hand helical grooves. This design reduces the contact area with the wellbore, thereby minimizing the risk of differential sticking while maintaining the weight and stiffness characteristic of standard drill collars. The product is manufactured from AISI 4145H alloy steel, complies with API 7‑1 standards, and can be customized in terms of outside diameter and length to meet specific requirements.
Product Description
• Basic Information: The spiral drill collar is a specialized type of drill collar featuring three right-hand helical grooves machined on its outer surface. This helical design reduces the contact area between the drill collar and the wellbore, thereby significantly lowering the risk of differential sticking. Despite the reduced contact area, the spiral drill collar maintains the same weight and stiffness as a standard smooth drill collar. It is manufactured from AISI 4145H alloy steel.
• Application scenarios: Directional and horizontal wells with a high risk of differential sticking; wells with significant wellbore deviation; and high‑pressure differentials. Suitable for challenging drilling environments.
• Product Advantages: Reduces wellbore contact; lowers the risk of differential sticking; maintains full weight on bit (WOB) and rigidity; API 7‑1 certified; customizable spiral groove designs available.
• Customer Case Feedback: The preferred choice for directional drilling projects. Customers report a significant reduction in stuck‑tool incidents.
Frequently Asked Questions (FAQ)
Q: How does the spiral design help?
A: It reduces the wellbore contact area, minimizes differential sticking to the greatest extent, and facilitates the outward circulation of drilling fluid carrying cuttings.
Q: Will it affect the WOB?
A: No, it only maintains its full weight and rigidity.
FAQs
Need more technical support?
Can the internal coating be repaired or repainted?
Based on the actual service conditions of drill pipes, locally damaged or worn internal coatings may be inspected, repaired, or re-coated.
Prior to repair, a comprehensive inspection will be conducted to assess internal corrosion, wall thickness, the condition of the existing coating, and the overall structural integrity. Following surface treatment, an FBE internal coating will be reapplied, and curing will be carried out under rigorously controlled process conditions to restore the component’s corrosion resistance, wear resistance, and fluid‑flow‑optimizing performance.
Regular inspection and timely repair of the internal coating help extend the service life of drill pipes and enhance the operational reliability of the drilling system.
How to choose the right internal coating?
Hebei Langwei offers four FBE internal coating systems with varying performance grades to meet diverse drilling requirements:
LPC3000P: Suitable for conventional oil and gas wells, water wells, and geothermal wells;
LPC3000P-HD: Suitable for deep wells, horizontal wells, extended-reach wells (ERD), and highly abrasive operating conditions;
LPC5000P: Suitable for deep wells, ultra-deep wells, and drilling operations with stringent requirements for hydraulic efficiency and service life;
LPC5000P-HD: Suitable for high‑temperature, high‑pressure (HPHT) wells, sour gas and oil wells (H₂S/CO₂), and other extreme drilling environments.
Hebei Langwei’s technical team can, based on the customer’s wellbore configuration, drilling fluid system, operating temperature, circulation rate, corrosive media, and specific drilling conditions, recommend the most suitable internal coating solution, achieving an optimal balance among product performance, service life, and overall total cost of ownership.
What internal coating systems do you offer?
LPC3000P: Suitable for conventional oil and gas wells, water wells, geothermal wells, and standard drilling operations;
LPC3000P-HD: Suitable for deep wells, horizontal wells, shale oil and gas wells, and highly abrasive operating conditions, offering superior wear resistance.
LPC5000P: Suitable for deep wells, ultra-deep wells, and high-temperature, complex operating conditions, particularly for projects with stringent requirements for wear resistance, hydraulic efficiency, and service life.
LPC5000P-HD: Designed for ultra-deep wells, high-pressure/high-temperature (HPHT) wells, sour gas wells (H2S/CO2), and other extreme drilling environments, it delivers exceptional wear and corrosion resistance as well as long-term operational reliability.
Why do drill pipes require an internal coating?
Adopting an FBE internal coating can provide the following advantages:
* Enhance corrosion resistance;
* Enhances resistance to erosion and wear;
* Reduce fluid flow resistance;
* Reduce pump pressure loss;
* Reduces scaling and deposit adhesion;
* Extend the service life of drill rods.
These advantages help improve drilling efficiency while reducing equipment maintenance costs and downtime.
What is an inner coating for drill pipes?
Compared with conventional drill pipes, coated‑in‑pipe drill pipes feature a smoother inner surface, which reduces flow resistance and pressure loss, minimizes scale buildup, enhances circulation efficiency, and effectively extends the service life of the drill pipe. They are widely used in oil and gas drilling, geothermal wells, water wells, and other complex drilling operations.
Spiral Drill Collar
OUR SERVICE
We offers a wealth of product support resources, including a range of technical and downloadable product manuals to product certifications.
Customization Product Catalog
We can customize high-performance drill pipe assemblies of various sizes according to customer needs.
Contact Us
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052260, East of Beikou, Yingli Town, Jinzhou County, Shijiazhuang City, Hebei Provice, China.
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