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Crossover Sub
Description
- 产品描述
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Product Overview
A conversion joint is a threaded adapter used to connect tubular components of varying sizes and thread types. It is available in male–male, male–female, and female–female configurations, manufactured from 4145H alloy steel, and offered in standard lengths of 36 inches or 48 inches. It is an essential component for connecting drill pipes to drill collars and for adapting between different thread types.
Product Description
• Basic Information: A crossover sub (also referred to as a transition or adapter sub) is a threaded connector used to join drill string components with different thread types or sizes. Both ends are equipped with tool joints, either male (pin) or female (box). Crossover subs enable connections between components that would otherwise be incompatible. Manufactured from the same 4145H alloy steel as drill collars, these products offer a variety of configurations to meet diverse connection requirements and support multiple thread combinations, including API REG, IF, FH, NC, PAC, SLH, DS, and others.
• Application scenarios: Connects drill pipes to drill collars; accommodates various thread types; joins drill strings composed of tubing with differing diameters; and serves as an indispensable component in the assembly of the bottomhole assembly (BHA).
• Product Advantages: Offers a variety of connection types, including male–male, male–female, and female–female; manufactured from 4145H high-strength alloy steel; features precision API threads; supports custom dimensions and thread combinations.
• Customer Case Feedback: Widely used in oil and gas drilling projects across the Middle East and Central Asia; customers rely on drill pipe subs with variable‑diameter connections to join drill pipes, heavy drill collars, and BHA components of varying thread types and sizes.
Frequently Asked Questions (FAQ)
Q: What configurations are provided?
A: Male × Male, Male × Female, Female × Female.
Q: What material is used?
A: 4145H alloy steel.
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.
Crossover Sub
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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