CAMTOP 11″ 3M Bolted-Cover Spherical BOP — API 16A / 16D wellhead pressure control equipment, 3,000 psi WP, 11 inch bore, studded top / flanged bottom connection, hydraulic operation. Field-serviceable bolted cover, shareable spare parts across the CAMTOP Spherical BOP family.
CAMTOP 11″ 3M Bolted-Cover Spherical BOP | API 16A Wellhead Pressure Control
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Description
CAMTOP 11″ 3M Bolted-Cover Spherical BOP — API 16A Wellhead Pressure Control
The CAMTOP 11 Inch 3M Bolted-Cover Spherical BOP is a large-bore annular-style blowout preventer engineered for wellhead pressure isolation on high-pressure oil and gas wellheads. Rated for 3,000 psi (3M) working pressure and conforming to API 16A / API 16D specifications, the bolted-cover spherical BOP delivers reliable pressure control on exploration, production, and workover operations where standard rams are impractical.
This 11″ model is one of the CAMTOP Spherical BOP family — sharing wear-ring, seal, and fastener components with our 7-1/16″ 10M / 7-1/16″ 5M / 11″ 5M / 13-5/8″ 5M / 20-3/4″ 3M units. Common service parts such as P/N 150613 wear rings, P/N 050243 eye bolts, and P/N 050823 hammer wrench simplify operator inventory and reduce spare-parts cost.
Product Image
Figure 1 — CAMTOP 11″ 3M Bolted-Cover Spherical BOP (front view, shown with studs and top anchor shackle installed).
Key Features
- API 16A / API 16D Compliant — Designed, manufactured, and tested to API specifications for wellhead pressure-control equipment.
- 3,000 psi (3M) Working Pressure — Field-rated for medium- to high-pressure land and offshore wellhead stacks.
- 11 Inch (280 mm) Bore — Large through-bore accommodates oversized drill strings, casing strings, and wireline tools.
- 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 150486 / 152019) — Direct integration with API 6B flange bolting on the wellhead adapter.
- Sealing Element P/N 150498 Piston — Heat-treated steel piston with replaceable nitrile and natural elastomer sealing elements (P/N 150578 blue nitrile / 150579 red natural).
- Replaceable Wear Rings P/N 150613 — Field-installable wear bands on piston and lower housing extend service life.
- Adapter Ring P/N 152026 — Allows over-gauge tools to pass through the bore when configured for stripping operations.
- API 6B Stud & Nut Set (P/N 150487 / 020108) — Pre-matched stud/nut set for the upper housing flange sealing.
- Anchor Shackles P/N 060499 (×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 155075 seal kit and P/N 152715 accumulator kit available for scheduled maintenance and control-system upgrades.
Technical Specifications
| Specification | Value |
|---|---|
| Product Name | 11" 3M Bolted-Cover Spherical BOP |
| Bore Size | 11 inch (280 mm) |
| Working Pressure | 3,000 psi (3M / 20.7 MPa) |
| Test Pressure | 6,000 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 150486) |
| Bottom Connection | API 6B Flanged (Lower Housing P/N 152019) |
| Bolted-Cover Fasteners | Studs P/N 150487 / Nuts P/N 020108 |
| Seal Material Options | Nitrile (Blue) P/N 150578 / Natural (Red) P/N 150579 |
| Wear Rings | P/N 150613 (piston & lower housing) |
| Operating Medium | Hydraulic (hydraulic actuator interface) |
| Approx. Weight (Bare Unit) | 1,400 lb / 635 kg (typical, varies with stud set) |
| Optional Accessories | Seal Kit P/N 155075, Accumulator Kit P/N 152715 |
| Service Class | PRD (Pressure-Rated Drilling) |
BOM — Spherical BOP 11″ 3M (Typical)
The CAMTOP 11″ 3M Bolted-Cover Spherical BOP consists of 23 typical BOM parts plus 5 recommended spares & accessories. Field service typically requires replacement of wear rings (P/N 150613), seals (P/N 150578 / 150579), and pipe plugs during scheduled maintenance.
BOM — Page 1 (Cover & Sealing Stack)
| Description | P/N | Qty. |
|---|---|---|
| Lower Housing-Flanged | 152019 | 1 |
| Upper Housing-Studded | 150486 | 1 |
| Piston | 150498 | 1 |
| Adapter Ring | 152026 | 1 |
| Sealing Element — Nitrile (Blue) | 150578 | 1 |
| Sealing Element — Natural (Red) | 150579 | 1 |
| Stud (Cover) | 150487 | 1 Set** |
| Nut (Cover) | 020108 | 1 Set** |
| Seal — Piston I.D. Upper | 031099 | 1 |
| Seal — Piston I.D. Lower | 031101 | 1 |
| Seal — Piston O.D. | 030765 | 2 |
| Seal — Adapter I.D. Upper | 031098 | 1 |
| Seal — Adapter I.D. Lower | 030761 | 1 |
| Seal — Adapter O.D. | 030760 | 1 |
| Seal — Adapter Top | 131095 | 1 |
| Wear Ring — Piston | 150613 | 2 |
| Wear Ring — Lower Housing | 150613 | 1 |
| Pipe Plug (Cover) | 066335 | 2 |
| Anchor Shackle | 060499 | 2 |
| Stud for API Flange | 011015 | 1 Set** |
| Nut for API Flange | 020011 | 1 Set** |
| Wear Ring — Adapter Ring | — | 1 |
| Eye Bolts | 050243 | 2 |
** Part numbers are for each one. Quantity varies with size of spherical BOP.
BOM — Page 2 (Continued — Service Tools & Accessories)
| Description | P/N | Qty. |
|---|---|---|
| Hammer Wrench | 050823 | 1 |
| Pipe Plug (1/2" NPT) | 066326 | 1 |
| Pipe Plug (1/4" NPT) | 065008 | 1 |
| Seal Kit* | 155075 | 1 |
| Accumulator Kit† | 152715 | 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 Image 1 & 2)
BOM Table — Page 1 (Cover & Sealing Stack)
BOM Table — Page 2 (Service Tools & 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 020011 |
| 2 | Stud for Top API Flange | P/N 011015 |
| 3 | Nut | P/N 020108 (Set) |
| 4 | Stud | P/N 150487 (Set) |
| 5 | Anchor Shackle | P/N 060499 |
| 6 | Upper Housing, Studded | P/N 150486 |
| 7 | Sealing Element | P/N 150578 / 150579 |
| 8 | Seal, Adapter OD | (Cross-ref #5 of Seals) |
| 9 | Seal, Adapter Top (C) | P/N 131095 |
| 10 | Adapter Ring | P/N 152026 |
| 11 | Seal, Adapter ID Upper (B) | P/N 031098 |
| 12 | Seal, Adapter ID Lower | P/N 030761 |
| 13 | Piston | P/N 150498 |
| 14 | Wear Band (×3) | P/N 150613 |
| 15 | Seal, Piston OD Upper (3) and Lower (1) | P/N 030765 |
| 16 | Seal, Piston ID Upper (A) | P/N 031099 |
| 17 | Seal, Piston ID Lower | P/N 031101 |
| 18 | Wear Band | P/N 150613 |
| 19 | Lower Housing, Flanged | P/N 152019 |
| 20 | Pipe Plug | P/N 066335 |
* 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
- Land Drilling Rigs — Wellhead pressure isolation on medium- to high-pressure land rigs (3M WP).
- Offshore Platforms — Surface BOP stack element for wellhead pressure control on fixed platform drilling operations.
- Workover & Completion — Annular pressure isolation for snubbing, completion, and well-intervention service rigs.
- High-Pressure Wells — Intermediate BOP stack element in 5,000 – 10,000 psi wellhead systems.
- Casing String Protection — Stripping and back-pressure control for running casing strings through the wellhead.
- 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.
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), eye bolts (P/N 050243), hammer wrench (P/N 050823), and API flange studs (P/N 011015) are shared across the CAMTOP 7-1/16″ to 20-3/4″ 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 155075) and Accumulator Kit (P/N 152715) 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 11″ 3M Bolted-Cover Spherical BOP with the following options:
- Base Unit SKU: CT-SPB-11-3M-001 (11″, 3M, 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 150487 studs / 020108 nuts)
- Recommended Spare Seal Kit: P/N 155075
- Recommended Accumulator Kit: P/N 152715
Contact CAMTOP for Orders & Technical Support
Email: sales@cposl.com
Phone: +86-18621723891
Address: Shanghai, China
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