-
Drill Pipe
View Products
Heavy Weight Drill Pipe
View Products
Drill Collar
View Products
Kelly
View Products
Tool Joint
View Products
Surface Protection & Internal Coating
View Products
Specialty Drill Products
View Products
-
-
-
-
Internal Coating
Description
- 产品描述
-
Product Overview
The LPC series of internal coatings comprises two models: LPC3000P and LPC5000P. The LPC3000P is rated for temperatures up to 180°C, while the LPC5000P withstands temperatures as high as 204°C. Compared with uncoated drill pipes, this coating can extend service life by a factor of 2 to 4 and reduce drilling energy consumption by 10–25%. The product complies with NS‑1 requirements and industry‑recognized coating standards.
Product Description
• Basic Information: Internal coating (IPC) is a protective layer applied to the inner surface of drill pipes, designed to prevent corrosion, reduce friction, and enhance hydraulic performance. The LPC series coatings are epoxy‑phenolic powder coatings available in two grades: LPC3000P, suitable for operating temperatures up to 180°C, and LPC5000P, suitable for temperatures up to 204°C. Both coatings offer excellent corrosion resistance and can reduce drilling energy consumption by 10%–25%. Compared with uncoated drill pipes, LPC3000P can double service life, while LPC5000P can extend it by a factor of three to four.
• Application scenarios: Suitable for corrosive downhole environments, well conditions containing CO2/H2S, and high‑velocity drilling fluid operations. Also applicable to deep wells and sulfur‑containing (acidic) operating environments.
• Product Advantages: LPC3000P (temperature resistance up to 180°C, with a service life extended by a factor of two); LPC5000P (temperature resistance up to 204°C, resistant to H₂S corrosion, with a service life extended by a factor of three to four). These products offer corrosion resistance, friction reduction, and enhanced flow efficiency, enabling a 10%–25% reduction in drilling energy consumption. They comply with NS‑1 standards and industry‑recognized coating specifications.
• Customer Case Feedback: Applied in drilling environments with risks of CO2 and H2S corrosion. Customers report extended drill pipe service life, reduced pressure loss, and improved hydraulic efficiency.
Product Specifications
• LPC3000P Internal Coating Technical Specification Sheet
Twelve Core Performance Metrics
Serial number Project Parameter 1 Coating Type Epoxy-Phenolic Powder Coating 2 Coating color Yellow 3 Coating thickness 150–300 μm 4 Maximum operating temperature 180℃ 5 Abrasion resistance (sand-drop method, 1 kg/1000 revolutions) ≥2.4 L/μm 6 Effect of extended service life Drill pipe service life extended by 1–2 times. 7 Adhesion Grade Grade A 8 Impact resistance Excellent 9 Recommended applicable well depth Well depth ≤ 5,000 m 10 Bending resistance Good 11 Surface roughness (Ra) 0.5–0.6 μm, which can reduce drilling mud power loss by 10%–15%. 12 pH tolerance range 2–12.5, suitable for hydrogen sulfide- and carbon dioxide‑containing acidic environments, as well as alkaline environments such as cement slurries and drilling fluids. This product employs fusion‑bonded epoxy (FBE) technology, delivering outstanding wear resistance and exceptional adhesion. With a maximum coating thickness of up to 300 µm, it offers excellent cost‑effectiveness and effectively addresses hydrogen sulfide and carbon dioxide corrosion, as well as high‑velocity solid‑particle erosion, in deep‑well operating conditions.
• LPC3000P-HD (Heavy-Duty) Internal Coating Technical Data Sheet
Twelve Core Performance Metrics
Serial number Project Parameter 1 Coating Type Epoxy-Phenolic Powder Coating 2 Coating color Yellow 3 Coating thickness 250–350 μm 4 Maximum operating temperature 196℃ 5 Abrasion resistance (sand-drop method, 1 kg/1000 revolutions) ≥2.4 L/μm 6 Effect of extended service life Drill pipe service life doubled 7 Adhesion Grade Grade A 8 Impact resistance Excellent 9 Recommended applicable well depth Well depth ≤ 6,500 m 10 Bending resistance Good 11 Surface roughness (Ra) 0.4–0.6 μm, which can reduce drilling mud power losses by 11%–16%. 12 pH tolerance range 2.5–13, suitable for hydrogen sulfide- and carbon dioxide‑containing acidic environments, as well as alkaline environments such as cement slurries and drilling fluids. The LPC3000P-HD is an upgraded version of the LPC3000P.
It uses epoxy‑phenolic fusion‑bonded epoxy powder as the coating material, with a maximum coating thickness of 350 microns, offering superior wear resistance and corrosion protection.
As an advanced coating solution, it is specifically designed to address hydrogen sulfide and carbon dioxide corrosion, as well as high-velocity solid particle erosion, in deep-well environments.
• LPC5000P Internal Coating Technical Specification Sheet
Twelve Core Performance Metrics
Serial number Project Parameter 1 Coating Type Epoxy-Phenolic Powder Coating 2 Coating color Green 3 Coating thickness 250–350 μm 4 Maximum operating temperature 204℃ 5 Abrasion resistance (sand-drop method, 1 kg/1000 revolutions) ≥3.5 L/μm 6 Effect of extended service life Drill pipe service life extended by 3–4 times. 7 Adhesion Grade Grade A 8 Impact resistance Excellent 9 Recommended applicable well depth Well depth ≤ 8,000 m 10 Bending resistance Good 11 Surface roughness (Ra) 0.4 μm, which can reduce drilling mud power losses by 15%–20%. 12 pH tolerance range 3–13, suitable for hydrogen sulfide- and carbon dioxide‑containing acidic environments, as well as alkaline environments such as cement slurries and drilling fluids. This product utilizes epoxy‑phenolic fusion‑bonded epoxy powder sourced from U.S.-based Velsicol, with a maximum coating thickness of 350 microns, delivering outstanding wear resistance and corrosion protection.
A smooth inner-wall coating can enhance the flowability of drilling mud and reduce its hydraulic power consumption.
Suitable for deep-well corrosion service conditions involving corrosive media such as hydrogen sulfide, carbon dioxide, acids, alkalis, and salts.
• LPC5000P-HD (Heavy-Duty) Internal Coating Technical Data Sheet
Twelve Core Performance Metrics
Serial number Project Parameter 1 Coating Type Epoxy-Phenolic Powder Coating 2 Coating color Green 3 Coating thickness 300–450 μm 4 Maximum operating temperature 214℃ 5 Abrasion resistance (sand-drop method, 1 kg/1000 revolutions) ≥3.5 L/μm 6 Effect of extended service life Drill pipe service life extended by a factor of four. 7 Adhesion Grade Grade A 8 Impact resistance Excellent 9 Recommended applicable well depth Well depth ≤ 8,500 m 10 Bending resistance Good 11 Surface roughness (Ra) 0.25–0.4 μm, which can reduce drilling mud power losses by 20%–25%. 12 pH tolerance range 5–15, suitable for hydrogen sulfide- and carbon dioxide‑containing acidic environments, as well as alkaline environments such as cement slurries and drilling fluids. The LPC5000P-HD is an upgraded version of the LPC5000P.
Utilizing epoxy‑phenolic fusion‑bonded epoxy powder from U.S.-based Velsicol, the coating can achieve a maximum thickness of 450 microns, significantly enhancing wear and corrosion resistance while effectively reducing drilling mud pumping power.
It can provide protective solutions for deep and ultra-deep well operating conditions exposed to corrosive media such as hydrogen sulfide, carbon dioxide, and acidic or alkaline salts.
Frequently Asked Questions (FAQ)
Q: What is the difference between the LPC3000P and the LPC5000P?
A: The main differences lie in the temperature rating and H2S resistance.
Q: By how much can the service life of drill rods be extended?
A: Compared with uncoated drill rods, the service life can be extended by a factor of 2 to 4.
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.
Internal Coating
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
Telephone
Phone/Wechat
Address
052260, East of Beikou, Yingli Town, Jinzhou County, Shijiazhuang City, Hebei Provice, China.
Get in Touch
* Fill in your phone number and email information, and we will promptly contact you within one business day to address your concerns as soon as possible.