CAMTOP 21″ 1/4" 2M Bolted-Cover Spherical BOP — API 16A / 16D wellhead pressure control equipment, 2,000 psi WP, 21-1/4 inch (540 mm) bore for large-casing operations, studded top / flanged bottom connection, hydraulic operation. Field-serviceable bolted cover, shareable spare parts across the CAMTOP Spherical BOP family.
CAMTOP 21″ 1/4″ 2M Bolted-Cover Spherical BOP | API 16A Wellhead Pressure Control
£0.00
Description
CAMTOP 21″ 1/4" 2M Bolted-Cover Spherical BOP — API 16A Wellhead Pressure Control
The CAMTOP 21 1/4 Inch 2M Bolted-Cover Spherical BOP is an extra-large-bore blowout preventer engineered for wellhead pressure isolation where oversized tubulars and casing strings require a 21-1/4 inch (540 mm) bore. Rated for 2,000 psi (2M) working pressure and conforming to API 16A / API 16D specifications, the bolted-cover spherical BOP delivers reliable wellhead pressure control on exploration, workover, and large-casing-handling operations where standard ram BOPs are impractical.
This 21″ 1/4" 2M model extends the CAMTOP Spherical BOP family to the largest bore available in this product line. It shares wear-ring, eye-bolt, NPT-pipe-plug, and hammer-wrench components with our 7-1/16" 10M / 7-1/16" 5M / 11" 5M / 11" 3M / 13-5/8" 5M / 20-3/4" 3M units. Common service parts such as P/N 150613 wear rings, P/N 152344 adapter-ring wear band, P/N 050243 eye bolts, P/N 066326 1/2" NPT pipe plug, and P/N 065008 1/4" NPT pipe plug simplify operator inventory and reduce spare-parts cost across the family.
Product Image
Figure 1 — CAMTOP 21″ 1/4" 2M Bolted-Cover Spherical BOP (front view, 21-1/4 inch / 540 mm bore, with bolted studded cover).
Key Features
- API 16A / API 16D Compliant — Designed, manufactured, and tested to API specifications for wellhead pressure-control equipment.
- 2,000 psi (2M) Working Pressure — Field-rated for medium-pressure land and offshore wellhead stacks handling oversized tubulars.
- 21-1/4 Inch (540 mm) Bore — Extra-large through-bore for accommodating large-diameter drill strings, casing strings, completion tools, and workover strings.
- Bolted-Cover Construction — Robust studded flange cover allows simple field service and seal inspection without specialized fixtures.
- Studded Upper Housing / Flanged Lower Housing (P/N 150749 / 152204) — Direct integration with API 6B flange bolting on the wellhead adapter.
- Sealing Element P/N 155623 Piston — Heat-treated steel piston with replaceable nitrile and natural elastomer sealing elements (P/N 150799 blue nitrile / 150800 red natural).
- Replaceable Wear Rings P/N 150613 — Field-installable wear bands on piston and lower housing extend service life.
- Adapter Ring P/N 152183 — Allows over-gauge tools to pass through the bore when configured for stripping operations.
- Adapter-Ring Wear Band P/N 152344 — Field-installable wear band on the adapter ring extends adapter-ring service life in heavy-stripping operations.
- API 6B Stud & Nut Set (P/N 150832 / 020107) — Pre-matched stud/nut set for the upper housing flange sealing.
- API Flange Stud & Nut Set (P/N 011023 / 020012) — Pre-matched stud/nut set for the API 6B flange connection on top of the upper housing.
- Anchor Shackles P/N 060498 (×2) — Lifting attachment rated for safe handling during rig-up and rig-down operations.
- Hydraulic Operated — Interfaces with the rig BOP control system for remote, fail-safe closure.
- Built-In Drain & Gauge Ports — 1/2" NPT (P/N 066326) and 1/4" NPT (P/N 065008) pipe plugs provide pressure-monitoring and leak-detection access.
- Optional Seal Kit & Accumulator Kit — P/N 155067 seal kit and P/N 152717 accumulator kit available for scheduled maintenance and control-system upgrades.
Technical Specifications
| Specification | Value |
|---|---|
| Product Name | 21″ 1/4" 2M Bolted-Cover Spherical BOP |
| Bore Size | 21″ 1/4 inch (540 mm) |
| Working Pressure | 2,000 psi (2M / 13.8 MPa) |
| Test Pressure | 4,000 psi (API 16A 2× WP) |
| Design Standard | API 16A / API 16D |
| Material Standard | API 60 (forged low-alloy steel) |
| Temperature Class | L (-60°F) / Standard / P (Class T available) |
| Top Connection | Studded (Upper Housing P/N 150749) |
| Bottom Connection | API 6B Flanged (Lower Housing P/N 152204) |
| Bolted-Cover Fasteners | Studs P/N 150832 / Nuts P/N 020107 |
| API Flange Stud & Nut | Studs P/N 011023 / Nuts P/N 020012 |
| Seal Material Options | Nitrile (Blue) P/N 150799 / Natural (Red) P/N 150800 |
| Wear Rings | P/N 150613 (piston & lower housing) / P/N 152344 (adapter ring) |
| Operating Medium | Hydraulic (hydraulic actuator interface) |
| Approx. Weight (Bare Unit) | 3,000 lb / 1,360 kg (typical, varies with stud set) |
| Optional Accessories | Seal Kit P/N 155067, Accumulator Kit P/N 152717 |
| Service Class | PRD (Pressure-Rated Drilling) |
BOM — Spherical BOP 21″ 1/4" 2M (Typical)
The CAMTOP 21″ 1/4" 2M Bolted-Cover Spherical BOP consists of 8 typical BOM parts on Page 1 (housing & sealing elements) plus 21 typical parts on Page 2 Continued (seals, wear rings, fasteners, accessories). Field service typically requires replacement of wear rings (P/N 150613 / 152344), seals (P/N 150799 / 150800), and pipe plugs during scheduled maintenance.
BOM — Page 1 (Housing & Sealing Elements)
| Description | P/N | Qty. |
|---|---|---|
| Lower Housing-Flanged | 152204 | 1 |
| Upper Housing-Studded | 150749 | 1 |
| Piston | 155623 | 1 |
| Adapter Ring | 152183 | 1 |
| Sealing Element — Nitrile (Blue) | 150799 | 1 |
| Sealing Element — Natural (Red) | 150800 | 1 |
| Stud (Cover) | 150832 | 1 Set** |
| Nut (Cover) | 020107 | 1 Set** |
** Part numbers are for each one. Quantity varies with size of spherical BOP.
BOM — Page 2 Continued (Seals, Wear Rings & Accessories)
| Description | P/N | Qty. |
|---|---|---|
| Seal — Piston I.D. Upper | 031108 | 1 |
| Seal — Piston I.D. Lower | 030761 | 1 |
| Seal — Piston O.D. | 030767 | 2 |
| Seal — Adapter I.D. Upper | 031107 | 1 |
| Seal — Adapter I.D. Lower | 031018 | 1 |
| Seal — Adapter O.D. | 031019 | 1 |
| Seal — Adapter Top | 031027 | 1 |
| Wear Ring — Piston | 150613 | 2 |
| Wear Ring — Lower Housing | 150613 | 1 |
| Pipe Plug (Cover) | 066329 | 2 |
| Anchor Shackle | 060498 | 2 |
| Stud for API Flange | 011023 | 1 Set** |
| Nut for API Flange | 020012 | 1 Set** |
| Wear Ring — Adapter Ring | 152344 | 1 |
| Eye Bolts | 050243 | 2 |
| Hammer Wrench | 050822 | 1 |
| Pipe Plug (1/2" NPT) | 066326 | 1 |
| Pipe Plug (1/4" NPT) | 065008 | 1 |
| Seal Kit* | 155067 | 1 |
| Accumulator Kit† | 152717 | 1 |
* Not a standard accessory. Includes all recommended spare seals.
** Part numbers are for each one. Quantity varies with size of spherical.
† Not a standard accessory.
BOM — Original Reference (BOM List Page 1 & 2)
BOM Table — Page 1 (Housing & Sealing Elements)
BOM Table — Page 2 (Seals, Wear Rings & Accessories)
Bolted-Cover Exploded View
Figure 4-13. Bolted-Cover Exploded View (20 numbered components).
| No. | Component | Cross-Reference |
|---|---|---|
| 1 | Nut for Top API Flange | P/N 020012 |
| 2 | Stud for Top API Flange | P/N 011023 |
| 3 | Nut | P/N 020107 (Set) |
| 4 | Stud | P/N 150832 (Set) |
| 5 | Anchor Shackle | P/N 060498 |
| 6 | Upper Housing, Studded | P/N 150749 |
| 7 | Sealing Element | P/N 150799 / 150800 |
| 8 | Seal, Adapter OD | (Cross-ref #5 of Seals) |
| 9 | Seal, Adapter Top (C) | P/N 031027 |
| 10 | Adapter Ring | P/N 152183 |
| 11 | Seal, Adapter ID Upper (B) | P/N 031107 |
| 12 | Seal, Adapter ID Lower | P/N 031018 |
| 13 | Piston | P/N 155623 |
| 14 | Wear Band (×3) | P/N 150613 |
| 15 | Seal, Piston OD Upper (3) and Lower (1) | P/N 030767 |
| 16 | Seal, Piston ID Upper (A) | P/N 031108 |
| 17 | Seal, Piston ID Lower | P/N 030761 |
| 18 | Wear Band | P/N 150613 |
| 19 | Lower Housing, Flanged | P/N 152204 |
| 20 | Pipe Plug | P/N 066329 |
* Some bolted-cover sphericals have a wear band on the adapter ring. This wear band is not shown in the standard exploded view.
Application Scenarios
- Large-Casing Drilling Rigs — Surface pressure isolation for handling 18-5/8" to 20" casing strings on land rigs.
- Offshore Platform Drilling — Surface BOP stack element on fixed platform drilling operations where oversized BOP stacks are required.
- Workover & Completion Operations — Annular pressure isolation for snubbing, completion, and well-intervention service rigs handling 18-5/8" and larger casing.
- High-Capacity Wellheads — Top-of-stack BOP on 5,000 – 10,000 psi wellhead systems with 21-1/4" bore.
- Casing String Stripping — Back-pressure control for running and pulling large-diameter casing strings through the wellhead.
- Large-Bore Wireline Operations — Pressure barrier during wireline logging and intervention through large-bore wellheads.
- Well Kill & Circulating — Bullheading or reverse-circulation isolation during well-kill operations on high-rate wells.
Why Choose CAMTOP Spherical BOP
- API-Certified Manufacturing — Built under ISO 9001 / API Q1 quality systems with full material traceability and API 16A monogram.
- Family-Sharing Spare Parts — Wear rings (P/N 150613), adapter-ring wear band (P/N 152344), eye bolts (P/N 050243), hammer wrench (P/N 050822), and NPT pipe plugs (P/N 066326 / 065008) are shared across the CAMTOP 7-1/16" to 21-1/4" spherical BOP family, simplifying inventory.
- Field-Serviceable — Bolted cover allows in-field disassembly for seal replacement and wear-band service without shipping back to the manufacturer.
- Pre-Stocked Spare Kits — Seal Kit (P/N 155067) and Accumulator Kit (P/N 152717) available for immediate shipment.
- Competitive Pricing Direct from CAMTOP — Eliminate intermediary markups by sourcing direct from our Shanghai, China manufacturing facility.
Ordering Information
Configure and order your 21-1/4" 2M Bolted-Cover Spherical BOP with the following options:
- Base Unit SKU: CT-SPB-21-2M-001 (21-1/4", 2M, bolted-cover, studded top / flanged bottom)
- Seal Material: Default nitrile (blue) / natural (red) — HNBR and Viton available on request
- Bolted-Cover Fastener Set: Included (P/N 150832 studs / 020107 nuts)
- API Flange Fastener Set: Included (P/N 011023 studs / 020012 nuts)
- Recommended Spare Seal Kit: P/N 155067
- Recommended Accumulator Kit: P/N 152717
Contact CAMTOP for Orders & Technical Support
Email: sales@cposl.com
Phone: +86-18621723891
Address: Shanghai, China
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