Description
The Union Type Casing Circulating Head is a surface circulation accessory engineered to provide stable drilling fluid circulation during casing running and drilling operations. It features a standard union connection for easy integration with surface mud systems and manifold hoses, helping maintain efficient fluid flow and improve drilling performance in oil and gas projects.
Product Overview
A casing circulating head is an essential tool used in drilling and casing running procedures to allow drilling fluids to circulate downward through the casing and return through the annulus. The continuous circulation assists in carrying cuttings to the surface, stabilizing wellbore pressure, and minimizing the risk of stuck pipe or drilling interruptions.
The union type circulating head utilizes standard union connections, enabling quick hook-up and integration with mud hoses and surface circulation systems without the need for complex thread matching.
Key Features & Advantages
Standard Union Connection
Equipped with 2″ 1502 union top connection for easy attachment to surface mud lines and circulation systems.Fluid Circulation Efficiency
Designed to support stable fluid circulation between the drilling mud system and casing while running casing into the hole.Wide Size Compatibility
Available in 5-1/2″ to 20″ sizes to match a range of casing programs in oil and gas drilling applications.Multiple Thread Support
Bottom connection supports STC, LTC, and BTC thread types, enhancing flexibility for various casing configurations.High-Strength Construction
Precision-machined from quality materials to ensure durability and steady performance in demanding field conditions.
Technical Specifications
| Size (in) | Working Pressure (MPa) | Union Connection | Thread Type |
|---|---|---|---|
| 5-1/2″ | 35 | 2″ 1502 union | STC / LTC / BTC |
| 7″ | 35 | 2″ 1502 union | STC / LTC / BTC |
| 9-5/8″ | 35 | 2″ 1502 union | STC / LTC / BTC |
| 10-3/4″ | 35 | 2″ 1502 union | STC / LTC / BTC |
| 13-3/8″ | 35 | 2″ 1502 union | STC / LTC / BTC |
| 20″ | 35 | 2″ 1502 union | STC / LTC / BTC |
Please send us your required specifications, parameters, or technical drawings. Our expert team will help confirm the suitable model and provide a factory quotation within 24 hours.
Email: info@shangshanpetro.com
Contact: Contact Us for a Quote
Applications
The Union Type Casing Circulating Head is suitable for:
Continuous drilling fluid circulation during casing running
Wellbore cleaning and cuttings removal
Pressure stabilization while running casing
Onshore and offshore oil & gas drilling operations
Maintaining fluid circulation through the circulating head helps improve drilling efficiency and reduce operational risks in complex well environments.
Frequently Asked Questions
Q1: What is a union type casing circulating head?
A union type casing circulating head is a drilling accessory designed with a standard union connection for easy integration with surface mud hoses and circulation systems, allowing fluid to circulate while running casing.
Q2: What sizes are available for this circulating head?
This model is offered in sizes from 5-1/2″ to 20″ to suit different casing programs.
Q3: What thread types does it support?
It supports STC, LTC, and BTC thread types for flexible bottom connections with various casing configurations.
Q4: Why is continuous fluid circulation important during casing running?
Continuous fluid circulation helps carry cuttings to the surface, stabilize wellbore pressure, and minimize drilling interruptions or stuck pipe situations.
