CAMTOP 11″ 5M psi Bolted-Cover Spherical BOP | API 16A | 27-Part BOM

Description

1. Product Overview

The CAMTOP 11″ 5M psi Bolted-Cover Spherical BOP is a large-bore, medium-pressure well-control blowout preventer engineered for 13-3/8″ / 13-5/8″ casing strings on land rigs, jack-up offshore platforms, and HPHT well operations. The spherical body integrates a dual-packer (energized-element) sealing system – a movable piston drives a pair of elastomer packers (Nitrile Blue + Natural Red) radially inward to close the bore around any drill string, kelly, open hole, or wireline tool – or fully shut-in the well when no pipe is in the hole.

API 16A Class 5M (5,000 psi working pressure), API 16D well-control choke-and-kill compatible, and NACE MR0175 sour-service ready as an option. The bolted-cover design allows fast field maintenance – upper housing studs are removed for direct access to the packer assembly, piston, seals, and wear bands without removing the body from the BOP stack.

This page also includes CAMTOP’s complete 27-part maintenance BOM (Bill of Materials) with full CAMTOP part numbers, plus a Figure 4-13 Bolted-Cover Exploded View identifying all 20 internal component positions – the same parts list issued for our refurbishment kits and field-rebuild training.

2. Product Image

3. Key Features

• API 16A Class 5M (5,000 psi WP) – rated for 11″ bore / 5,000 psi working pressure with API 6A PR2 performance verified.
• Bolted-Cover Design – top cover secured by a full circle of B7 studs for fast field disassembly and seal replacement.
• API 16A / 16D Compliance – designed and tested to API 16A (specification for BOP equipment) and API 16D (well-control choke-and-kill) standards.
• Forged Alloy-Steel Body – ASTM A4130 / A4140 forged low-alloy steel with quenched-and-tempered body for impact resistance and low-temperature toughness.
• Replaceable Wear Bands – wear bands on piston and lower housing extend service life; field-replaceable without honing the body.
• Dual-Packer Sealing System – Nitrile (Blue) + Natural (Red) elastomer packers; optional HNBR / Viton / AFLAS for H2S / HPHT service.
• Compatible Spare-Part Family – 27 part numbers cross-compatible with the CAMTOP 7-1/16″ 10M and 13-5/8″ 5M spherical BOP families (150613 wear-ring, 152344 adapter wear ring, 066328 pipe plug, 050243 eye bolt, etc.).
• Lifting & Handling Hardware – factory-installed anchor shackles and eye bolts for safe rig-floor lift.
• Sour-Service Ready (NACE MR0175) – optional sour-service trim for H2S-containing well environments.
• 27-Part BOM Support – all listed part numbers stocked by CAMTOP for fast spare-part dispatch worldwide.

4. Technical Specifications

5. Component Breakdown & Construction (Figure 4-13 Exploded View)

The image below is the Figure 4-13 Bolted-Cover Spherical BOP Exploded View – the same drawing used in CAMTOP’s service manual. It identifies the position of every internal part inside the assembled BOP. The 11″ 5M variant uses the same component layout as the 7-1/16″ 10M and 13-5/8″ 5M, with the only differences being the bore size, body OD, and a few part numbers (mainly the wear bands and adapter ring wear ring).

Component-Position Mapping (refer to the figure above):

• ① Nut for Top API Flange – secures the top studded flange to the upper housing.
• ② Stud for Top API Flange – high-tensile B7 stud (P/N 011026, 1 Set** in the BOM).
• ③ Nut + ④ Stud – main closure studs (P/N 020110 nut / 155561 stud, 1 Set** each).
• ⑤ Anchor Shackle – P/N 060497, factory-installed for rig-floor lifting.
• ⑥ Upper Housing, Studded – P/N 152328, the upper body with studded flange face.
• ⑦ Sealing Element (Packer, top) – Nitrile (Blue) P/N 150810 or Natural (Red) P/N 150809 – radial sealing on drill pipe / open hole.
• ⑧ Seal, Adapter OD – P/N 030783, outer-diameter seal between adapter and upper housing.
• ⑨ Seal, Adapter Top – P/N 031115, top face seal of the adapter ring.
• ⑩ Adapter Ring – P/N 152323, holds the upper packer assembly (5,000 psi rated).
• ⑪ Seal, Adapter ID Upper – P/N 031114, upper inner-diameter seal of the adapter.
• ⑫ Seal, Adapter ID Lower – P/N 030781, lower inner-diameter seal of the adapter.
• ⑬ Piston – P/N 152326, hydraulic-driven moving element.
• ⑭ Wear Band – P/N 150613 (Qty 2 on piston + Qty 1 on lower housing = 3 total per BOM), replaceable PTFE / bronze guide band.
• ⑮ Seal, Piston OD (Upper & Lower) – P/N 031018, Qty 2 in BOM – seals piston OD against the body bore.
• ⑯ Seal, Piston ID Upper – P/N 031113, upper inner-diameter seal of the piston.
• ⑰ Seal, Piston ID Lower – P/N 031152, lower inner-diameter seal of the piston.
• ⑱ Wear Band – P/N 152344, Qty 1 – adapter-ring wear band (some bolted-cover variants only; see footnote in Figure 4-13).
• ⑲ Lower Housing, Flanged – P/N 152406, bottom body with mating flange face.
• ⑳ Pipe Plug – P/N 066328, Qty 2 – hydraulic-port / drain plug.

6. Bill of Materials (27-Part Complete BOM)

Below is CAMTOP’s complete 27-part maintenance BOM for the 11″ 5M psi Bolted-Cover Spherical BOP. All P/Ns are stocked and ready for immediate spare-part dispatch. The first 25 rows are the main assembly; the bottom 2 rows (Pipe Plug 1/2″ NPT and 1/4″ NPT) are standard accessory variants.

** “1 Set” indicates a full set of fasteners required for one BOP assembly (e.g., the 011026 stud is supplied as a complete stud set for the API top flange).

Ordering Tip: All 27 part numbers in this BOM are stocked by CAMTOP for rapid spare-part dispatch. For a complete rebuild kit, order all parts above – typical rebuild requires replacement of the wear rings (150613 × 3 / 152344 × 1), piston & adapter seals (031113 / 031152 / 031018 / 031114 / 030781 / 030783 / 031115), and the elastomer packers (150810 Nitrile Blue / 150809 Natural Red). Items 26-27 (066326 / 065008 pipe-plug accessories) are sold separately if needed.

7. How It Works

The CAMTOP 11″ 5M Spherical BOP operates on a hydraulic-piston, dual-packer principle:

1. Open Position (Standby): Hydraulic pressure is vented; the piston is retracted upward; the packers (Items 5 & 6) retract outward, leaving the full 11″ bore open for tripping drill pipe, casing, or wireline tools.
2. Close on Pipe: Hydraulic pressure (3,000 psi recommended) is applied to the operating port; the piston (Item 3) drives downward, forcing the elastomer packers to converge radially around the drill string and seal the annulus.
3. Close on Open Hole (Full Shut-In): With no pipe in the hole, the packers converge to the centerline, creating a full-bore metal-to-metal and elastomer seal – the well is completely shut in.
4. Wear-Band Function: The replaceable wear bands (Items 16-17 / Item 22) guide the piston and adapter ring during stroking, preventing metal-to-metal contact and dramatically extending the life of the body and piston bore.
5. Field Rebuild: Remove upper-housing studs (Items 7-8), lift the upper housing, and all internal parts (Items 5-22) are directly accessible – no need to remove the BOP from the stack.

8. Applications

• 13-3/8″ / 13-5/8″ Casing String Wellhead – primary BOP for medium-pressure land and offshore wells.
• Land Drilling Rigs – 1,500 to 3,000 HP land rigs operating in 5,000 psi well-control environments.
• Jack-Up Offshore Platforms – marine-grade coating option available.
• HPHT Well Service – with optional HNBR / Viton / AFLAS elastomer trim.
• Sour H₂S Service – NACE MR0175 trim option for H₂S-containing wells.
• Well Testing & Intervention – primary or secondary BOP for wireline / coiled-tubing operations.
• Workover & Snubbing Operations – rugged body construction handles repeated cycling.
• Field-Ready Spare-Part Inventory – cross-compatible wear rings and seals with CAMTOP 7-1/16″ 10M and 13-5/8″ 5M families.

9. Why Choose CAMTOP

• API 16A Certified Factory – CAMTOP operates an API Q1 / 16A-licensed manufacturing facility with full material traceability and hydrostatic test reports.
• OEM / ODM Available – custom bore sizes, pressure ratings, elastomer trim, and flange connections available on request.
• 27-Part BOM Direct Stock – all listed part numbers stocked in our Shanghai warehouse for fast worldwide dispatch.
• Spherical-BOP Family Cross-Compatibility – 150613 / 152344 / 066328 / 050243 etc. are shared with the 7-1/16″ 10M and 13-5/8″ 5M spherical BOP families, reducing customer inventory burden.
• Factory-Direct Pricing – 30-50% lower than Cameron / Shaffer / Hydril equivalents with the same API 16A performance.
• 7-10 Day Standard Lead Time – quick delivery for standard 5M / 10M / 15M variants.
• 24/7 Technical Support – CAMTOP engineers available for installation, commissioning, and rebuild assistance.

10. Ordering Information

When ordering the CAMTOP 11″ 5M psi Bolted-Cover Spherical BOP or any spare part from the 27-part BOM, please specify:

1. Product: 11″ 5M psi Bolted-Cover Spherical BOP (complete assembly) or individual part P/N.
2. Elastomer Type: Nitrile (standard) / HNBR / Viton / AFLAS (HPHT or H₂S service).
3. Trim Material: Standard (4130/4140) or NACE MR0175 sour-service trim.
4. Flange Connection: API 6A BX-158 studded (standard 11″ 5M).
5. Quantity & Lead Time: standard lead time 7-10 working days; expedited 5-7 days.
6. Documentation: Material Test Report (MTR), Hydrostatic Test Report, API 16A Certificate of Conformance supplied with every order.