Adapter Bonnets | DEENPU Machinery

  1. Home
  2. Adapter Bonnets | DEENPU Machinery






Adapter Bonnets | DEENPU Machinery


Home/Products/API 6A Wellhead/Adapter Bonnets

Adapter Bonnets

DEENPU adapter bonnets are engineered for multiple wellhead applications including BO-2, B2P, B1, TC-CL, TC-EN and TC-CC configurations. Available in 7-1/16″ and 11″ flange sizes with working pressures up to 10,000 PSI, our adapter bonnets deliver reliable tubing suspension and wellhead sealing performance.

Up to 10,000 PSI
7-1/16″ & 11″ Flange
6 Configurations
API 6A Compliant
Multiple Tubing Sizes

DEENPU BO-2 Adapter Bonnet

Product Overview

DEENPU Adapter Bonnets are critical wellhead components designed to connect the tubing hanger to the wellhead casing spool or tubing head, providing a sealed pathway for production tubing while maintaining pressure integrity. Manufactured to API 6A specifications, our adapter bonnets are available in six standard configurations to match the most common tubing hanger and wellhead assembly requirements.

Each DEENPU adapter bonnet is precision-machined from high-quality alloy steel forgings, with critical sealing surfaces finished to tight tolerances for reliable metal-to-metal sealing. The flange connections are machined to API 6A dimensional standards, ensuring full interchangeability with standard API wellhead equipment. All bonnets are pressure-tested and certified before shipment to verify seal integrity and structural strength.

DEENPU adapter bonnets are available in 7-1/16″ and 11″ bottom flange sizes, with top flange or thread connections ranging from 2-1/16″ to 4-1/16″ and working pressures from 2,000 PSI to 10,000 PSI. Multiple tubing size options are available within each configuration to match your specific completion requirements.

DEENPU BO-2 Adapter Bonnet
DEENPU B2P Adapter Bonnet
DEENPU B1 Adapter Bonnet
DEENPU TC-CL Adapter Bonnet
DEENPU TC-EN Adapter Bonnet
DEENPU TC-CC Adapter Bonnet

How It Works

Adapter bonnets serve as the uppermost component of the wellhead assembly above the tubing hanger. They provide a sealed connection between the tubing hanger and the Christmas tree or flowline equipment, while containing the production pressure within the wellhead.

The adapter bonnet is mounted on the top flange of the tubing head or casing spool using API ring gaskets and stud bolts. The lower portion of the bonnet matches the API flange of the wellhead component below, while the upper portion provides either a flange connection (for attaching a Christmas tree or valve assembly) or a threaded connection (for attaching tubing or coupling).

Inside the adapter bonnet, a seal bore or polished bore receptacle accommodates the tubing hanger or packoff seal, providing a pressure-tight barrier between the production tubing and the annulus. The bonnet design ensures that all pressure-containing surfaces are properly rated for the maximum anticipated well pressure, with safety factors meeting or exceeding API 6A requirements.

Key Features

API 6A Compliant

All DEENPU adapter bonnets are manufactured to API 6A specifications, ensuring dimensional interchangeability, material traceability, and pressure ratings that meet or exceed industry standards.

Alloy Steel Forging

Bonnet bodies are machined from high-quality alloy steel forgings with controlled grain structure, providing superior mechanical properties and pressure integrity compared to cast alternatives.

Precision Sealing Surfaces

Critical flange and seal bore surfaces are finish-machined to tight tolerances, ensuring reliable metal-to-metal sealing and preventing leak paths under high-pressure conditions.

Multiple Configurations

Available in BO-2, B2P, B1, TC-CL, TC-EN and TC-CC configurations to match standard tubing hanger types and wellhead assembly requirements.

Wide Pressure Range

Rated from 2,000 PSI to 10,000 PSI working pressure, covering the full spectrum of production wellhead applications from low-pressure to high-pressure completions.

Full Material Traceability

Every bonnet is supplied with complete Material Test Reports (MTRs) documenting chemical composition, mechanical properties, and heat treatment records for full quality assurance.

BO-2 Adapter Bonnets

The BO-2 adapter is a coupling adapter that works with the BO-2 coupling as an entire assembly to suspend the tubing. Available in 7-1/16″ bottom flange size with multiple top flange and tubing size combinations.

Bottom Flange Working Pressure Top Flange Working Pressure Tubing Size Approx. Weight
7-1/16″ 3,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 200 lbs
7-1/16″ 3,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 225 lbs
7-1/16″ 5,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 275 lbs
7-1/16″ 5,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 300 lbs
7-1/16″ 5,000 PSI 3-1/8″ 5,000 PSI 3-1/2″ 300 lbs
7-1/16″ 10,000 PSI 2-1/16″ 10,000 PSI 2-3/8″ 600 lbs
7-1/16″ 10,000 PSI 2-1/16″ 10,000 PSI 2-3/8″ 600 lbs
7-1/16″ 10,000 PSI 2-9/16″ 10,000 PSI 2-7/8″ 600 lbs
7-1/16″ 10,000 PSI 3-1/16″ 10,000 PSI 3-1/2″ 600 lbs
7-1/16″ 5,000 PSI 3-1/8″ 5,000 PSI 3-1/2″ 920 lbs
7-1/16″ 5,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 463 lbs
7-1/16″ 5,000 PSI 4-1/16″ 5,000 PSI 4-1/2″ 1300 lbs
7-1/16″ 10,000 PSI 3-1/16″ 10,000 PSI 3-1/2″ 1300 lbs
7-1/16″ 10,000 PSI 4-1/16″ 10,000 PSI 4-1/2″ 1350 lbs

B2P Adapter Bonnets

The B2P adapter fits with the TC-1A tubing hanger family. Available in 7-1/16″ bottom flange size with top flange options from 2-1/16″ to 2-9/16″.

Bottom Flange Working Pressure Top Flange Working Pressure Tubing Size Approx. Weight
7-1/16″ 3,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 132 lbs
7-1/16″ 3,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 143 lbs
7-1/16″ 5,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 187 lbs
7-1/16″ 5,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 198 lbs

B1 Adapter Bonnets

The B1 adapter bonnet is a single flange design available in 7-1/16″ bottom flange size with thread sizes from 2-3/8″ through 3-1/2″. The B1 can be used with or without a coupling.

Bottom Flange Working Pressure Thread Size Approx. Weight
7-1/16″ 2,000 PSI 2-3/8″ 117 lbs
7-1/16″ 2,000 PSI 2-7/8″ 110 lbs
7-1/16″ 2,000 PSI 3-1/2″ 112 lbs
7-1/16″ 3,000 PSI 2-3/8″ 132 lbs
7-1/16″ 3,000 PSI 2-7/8″ 132 lbs
7-1/16″ 3,000 PSI 3-1/2″ 134 lbs
7-1/16″ 5,000 PSI 2-3/8″ 187 lbs
7-1/16″ 5,000 PSI 2-7/8″ 187 lbs
7-1/16″ 10,000 PSI 2-3/8″ 309 lbs
7-1/16″ 10,000 PSI 2-7/8″ 309 lbs

TC-CL / TC-EN / TC-CC Adapter Bonnets

DEENPU TC-CL, TC-EN and TC-CC adapter bonnets offer both 7-1/16″ and 11″ bottom flange sizes, with top flange sizes from 2-1/16″ to 3-1/2″ and working pressures from 3,000 PSI to 10,000 PSI.

Bottom Flange Working Pressure Top Flange Working Pressure Tubing Size Approx. Weight
7-1/16″ 3,000 PSI 2-1/16″ 3,000 PSI 2-3/8″ 275 lbs
7-1/16″ 3,000 PSI 2-9/16″ 3,000 PSI 2-7/8″ 275 lbs
7-1/16″ 3,000 PSI 3-1/8″ 3,000 PSI 3-1/2″ 275 lbs
7-1/16″ 3,000 PSI 3-1/8″ 5,000 PSI 3-1/2″ 275 lbs
7-1/16″ 5,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 300 lbs
7-1/16″ 5,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 300 lbs
7-1/16″ 5,000 PSI 3-1/8″ 5,000 PSI 3-1/2″ 300 lbs
7-1/16″ 10,000 PSI 2-1/16″ 10,000 PSI 2-3/8″ 450 lbs
7-1/16″ 10,000 PSI 2-9/16″ 10,000 PSI 2-7/8″ 450 lbs
7-1/16″ 10,000 PSI 3-1/16″ 10,000 PSI 3-1/2″ 625 lbs
11″ 3,000 PSI 2-1/16″ 5,000 PSI 2-1/8″ 575 lbs
11″ 3,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 575 lbs
11″ 3,000 PSI 3-1/8″ 5,000 PSI 3-1/2″ 575 lbs
11″ 5,000 PSI 2-1/16″ 5,000 PSI 2-3/8″ 675 lbs
11″ 5,000 PSI 2-9/16″ 5,000 PSI 2-7/8″ 675 lbs
11″ 5,000 PSI 2-9/16″ 5,000 PSI 3-1/2″ 675 lbs
11″ 10,000 PSI 3-1/8″ 10,000 PSI 2-3/8″ 975 lbs
11″ 10,000 PSI 2-1/16″ 10,000 PSI 2-7/8″ 950 lbs
11″ 10,000 PSI 3-1/16″ 10,000 PSI 3-1/2″ 1000 lbs

Applications

DEENPU Adapter Bonnets are used across a wide range of oil and gas wellhead applications:

Production Wellheads
Injection Wellheads
Tubing Suspension
Christmas Tree Connection
Well Completion
Workover Operations
Packoff Sealing
High-Pressure Completions
Sour Gas Service

Ordering Guide

To request a quotation or place an order, please specify the following information:

Configuration Type

Specify adapter bonnet type: BO-2, B2P, B1, TC-CL, TC-EN or TC-CC. For B1, specify whether coupling is required.

Flange & Pressure

Bottom flange size (7-1/16″ or 11″), top flange size, working pressure (2,000 – 10,000 PSI), and tubing size.

Service & Material

Standard service or sour gas service (NACE MR0175). Specify material requirements if non-standard.

Quality Control & Testing

DEENPU maintains ISO 9001:2015 and API 6A quality management systems. Every adapter bonnet undergoes the following quality assurance:

Material Verification

100% chemical composition and mechanical property testing. PMI testing. Full MTR documentation for every heat of material.

Dimensional Inspection

Critical flange dimensions, seal bore diameters, and thread profiles verified against API 6A drawings using calibrated CMM equipment.

Pressure Testing

Hydrostatic shell test at 1.5x rated pressure. Seat leakage test at rated pressure. All tests witnessed and documented.

Frequently Asked Questions

What is the difference between BO-2 and B2P adapter bonnets? ▼
The BO-2 adapter is a coupling adapter that works with the BO-2 coupling as an entire assembly to suspend the tubing. The B2P adapter fits with the TC-1A tubing hanger family. The key difference is the tubing hanger interface: BO-2 uses a coupling assembly, while B2P is designed for the TC-1A hanger. Both are available in 7-1/16″ bottom flange with similar top flange options.

Can B1 adapter bonnets be used without a coupling? ▼
Yes, the B1 adapter bonnet is a single flange design that can be used with or without a coupling. When used without a coupling, the tubing threads directly into the bonnet. When used with a coupling, the coupling provides additional connection flexibility. The B1 is available with thread sizes from 2-3/8″ through 3-1/2″ in 7-1/16″ bottom flange size.

Are TC-CL, TC-EN and TC-CC bonnets interchangeable? ▼
While TC-CL, TC-EN and TC-CC bonnets share the same basic dimensional envelope and pressure ratings, they are designed for different tubing hanger seal types. The CL, EN and CC suffixes refer to the specific seal configuration and lockdown mechanism. It is important to match the bonnet type to the corresponding tubing hanger to ensure proper sealing and load capacity. Contact DEENPU engineering for assistance with selecting the correct configuration.

What is the maximum working pressure available? ▼
DEENPU adapter bonnets are available with working pressures up to 10,000 PSI. The specific pressure rating depends on the flange size, configuration type, and material grade. For 7-1/16″ bottom flange, 10,000 PSI is available in most configurations. For 11″ bottom flange, 10,000 PSI is available in select TC-series configurations. Lower pressure ratings (2,000, 3,000 and 5,000 PSI) are also available for less demanding applications.

What material certifications are provided? ▼
Standard documentation includes Material Test Reports (MTRs) documenting chemical composition, mechanical properties (yield strength, tensile strength, elongation, hardness), and heat treatment records. Upon request, we provide NACE MR0175 compliance certificates, NDE reports (MPI, UT), and third-party inspection certificates. All material is fully traceable from raw material to finished product.

What is the typical lead time for adapter bonnets? ▼
Standard adapter bonnets typically ship within 6-8 weeks from order confirmation. Custom configurations or special material requirements may extend lead time to 10-12 weeks. DEENPU maintains an inventory of common configurations for faster delivery. Contact our sales team for current stock availability and expedited delivery options.

Get a Quote for DEENPU Adapter Bonnets

Contact our sales team today to discuss your adapter bonnet requirements. We provide rapid quotations, technical support, and global shipping.

EMAIL

SALES@DEENPU-MACHINERY.COM

WHATSAPP

+86-15806284962