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Slick Drill Collar
Description
- 产品描述
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Product Overview
Type A drill collars feature a smooth, cylindrical outer surface and are the most widely used collar type, delivering maximum weight on bit in vertical well operations. Manufactured from AISI 4145H chromium‑molybdenum alloy steel and compliant with API 7‑1 standards, they are available in outside diameters ranging from 3‑1/8 inches to 11 inches. A full-length heat‑treatment process ensures uniform mechanical properties throughout the material.
Product Description
• Basic Information: Solid drill collars (also known as monolithic or standard drill collars) feature a smooth, cylindrical outer surface and are the standard type used in most drilling operations. Their smooth surface maximizes contact with the wellbore wall, ensuring efficient transmission of weight on bit. These products are manufactured from AISI 4145H alloy steel, with strict control over chemical composition, and are available in a variety of thread connections to meet the requirements of the bottom hole assembly (BHA).
• Application scenarios: Suitable for vertical and slightly deviated wells requiring maximum weight on bit (WOB); compatible with standard bottomhole assembly (BHA) configurations; applicable to most conventional drilling operations.
• Product Advantages: Maximizes weight-on-bit transmission; simple and robust design; API 7‑1 certified; excellent cost‑performance ratio; customizable dimensions; fully heat‑treated throughout.
• Customer Feedback: The most widely used type of drill collar in conventional drilling operations worldwide; customers highly praise its reliable performance and durability.
Frequently Asked Questions (FAQ)
Q: What is the wall thickness?
A: The wall thickness of drill collars ranges from 24 to 90 millimeters, approximately 4 to 6 times that of drill pipe.
Q: What connection types are provided?
A: Offers a variety of API threaded connections to match your bottom hole assembly (BHA).
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.
Slick 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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Address
052260, East of Beikou, Yingli Town, Jinzhou County, Shijiazhuang City, Hebei Provice, China.
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