Casing Spools
DEENPU CH-22 and CH-29 Casing Spools provide reliable casing suspension and annular sealing for oil and gas wellhead assemblies. Available with BP wear bushing retention or L full lock screw configurations, our casing spools deliver proven performance across a wide range of well completion applications.
Product Overview
DEENPU Casing Spools are critical wellhead components installed on the conductor or surface casing to suspend subsequent casing strings and seal the annulus between casing sizes. As the foundation of the wellhead assembly, casing spools must reliably support the immense weight of multiple casing strings while maintaining pressure integrity throughout the life of the well.
Our CH-22 and CH-29 casing spools are available in both BP (wear bushing retention) and L (full lock screw) configurations. BP spools are supplied with 2 lock screws for wear bushing retention, providing a simple, economical solution for standard completions. L spools feature a full set of lock screws for casing hanger and pack-off retention, offering enhanced load capacity and sealing reliability for demanding applications.
All DEENPU casing spools feature BG bottom preparation with PE or 4-0 secondary seal bushing compatibility as standard. Side outlets are available in line pipe (LP) or studded (Std) configurations to accommodate production and annulus flow requirements.
How It Works
The casing spool is installed on the surface casing head after the surface casing has been run and cemented. It provides the landing seat for the next casing hanger, which suspends the intermediate or production casing string. The spool body contains side outlets that provide access to the annulus between casing strings for monitoring, pressure control, and cement returns.
After the casing is landed and cemented, the casing hanger is seated in the spool bowl. For L-type spools, the full set of lock screws is tightened to compress the pack-off seal and secure the casing hanger. For BP-type spools, the 2 lock screws retain the wear bushing only, with the primary seal established through the casing hanger or the next wellhead component above.
The BG bottom preparation with secondary seal bushing creates an additional pressure-tight seal at the interface between the casing spool and the component below, providing a redundant barrier for enhanced well integrity.
Key Features
BP & L Configurations
BP spools with 2 lock screws for wear bushing retention; L spools with full lock screw set for casing hanger and pack-off retention.
BG Secondary Preparation
Standard BG bottom preparation with PE or 4-0 secondary seal bushing compatibility provides redundant pressure barrier.
LP & Studded Outlets
Available with line pipe (LP) threaded outlets or studded (Std) flanged outlets to match flow and pressure requirements.
Wide Size Range
Available from 11″ to 21-1/4″ bottom flange sizes with pressures from 2,000 to 10,000 PSI to match any completion program.
Alloy Steel Forging
Manufactured from high-quality alloy steel forgings with controlled grain structure for superior pressure integrity.
API 6A Compliant
All DEENPU casing spools are manufactured to API 6A specifications with full dimensional verification, material traceability, and pressure testing.
CH-22 / CH-29 Casing Spool Specifications
| Bottom Flange | WP | Top Flange | WP | Flow Size | A | B | C | D | Weight |
|---|---|---|---|---|---|---|---|---|---|
| 11″ | 3,000 | 11″ | 3,000 | 2-1/16 Std | 21-1/2″ | 11″ | 8″ | 11-3/4″ | 948 lbs |
| 11″ | 3,000 | 11″ | 5,000 | 2-1/16 Std | 26″ | 12-7/8″ | 8″ | 10-7/8″ | 1213 lbs |
| 11″ | 5,000 | 11″ | 5,000 | 2-1/16 Std | 26-1/4″ | 12-7/8″ | 8″ | 10-7/8″ | 1422 lbs |
| 11″ | 5,000 | 11″ | 10,000 | 1-13/16 Std | 26-1/4″ | 13-1/8″ | 8″ | 10-7/8″ | 1830 lbs |
| 11″ | 10,000 | 11″ | 10,000 | 1-13/16 Std | 26-1/4″ | 13-1/8″ | 9″ | 10-7/8″ | 1687 lbs |
| 13-5/8″ | 3,000 | 11″ | 3,000 | 2″ LP | 22″ | 10-5/8″ | 9″ | 10-7/8″ | 902 lbs |
| 13-5/8″ | 3,000 | 11″ | 3,000 | 2-1/16 Std | 22″ | 10-5/8″ | 9″ | 10-7/8″ | 1323 lbs |
| 13-5/8″ | 3,000 | 11″ | 5,000 | 2″ LP | 26″ | 13-3/8″ | 9″ | 10-7/8″ | 1477 lbs |
| 13-5/8″ | 3,000 | 11″ | 5,000 | 2-1/16 Std | 26″ | 13-3/8″ | 9″ | 10-7/8″ | 1455 lbs |
| 13-5/8″ | 5,000 | 11″ | 5,000 | 2-1/16 Std | 26″ | 13-3/8″ | 9″ | 10-7/8″ | 1488 lbs |
| 13-5/8″ | 5,000 | 11″ | 10,000 | 1-13/16 Std | 26-1/4″ | 13″ | 9″ | 10-7/8″ | 1631 lbs |
| 20-3/4″ | 3,000 | 13-5/8″ | 3,000 | 1-13/16 Std | 26″ | 13″ | 9″ | 13-5/8″ | 1400 lbs |
| 20-1/4″ | 3,000 | 13-5/8″ | 5,000 | 2-1/16 Std | 26″ | 13″ | 12-1/2″ | 13-5/8″ | 2690 lbs |
| 21-1/4″ | 2,000 | 13-5/8″ | 5,000 | 2-1/16 Std | 26-3/4″ | 13-3/4″ | 12-1/2″ | 13-5/8″ | 2469 lbs |
Applications
Ordering Guide
Configuration
CH-22 or CH-29 type, BP or L outfit, bottom/top flange sizes and pressures.
Outlet Type
Line pipe (LP) or studded (Std) side outlets with specified size.
Service & Material
Standard or NACE MR0175 sour service. Secondary seal bushing type.
Quality Control & Testing
Material Verification
100% MTRs, PMI testing, full chemical/mechanical documentation.
Dimensional Inspection
Flange dimensions, bowl profiles, bore diameters verified against API 6A standards using CMM.
Pressure Testing
Shell test at 1.5x rated pressure. Secondary seal verification. Lock screw function test.
Frequently Asked Questions
Get a Quote for DEENPU Casing Spools
Contact our sales team today to discuss your casing spool requirements.
+86-15806284962
About Us
Our company has been in the oil & gas drilling equipment industry for over more years, We are here to serve all your drilling equipment needs.