Drilling Technology

Variable Bore Rams

• Oil & Gas Pipelines Financial Models
• Blood Pressure Reduction Guide

One set of Cameron variable bore rams (VBRs) seals on several sizes of pipe or hexagonal kelly, eliminating the need for a set of pipe rams for each pipe size. Features include:

• VBR packer contains steel reinforcing inserts which rotate inward when the rams are closed so the steel provides support for the rubber which seals against the pipe.
• All VBRs are suitable for H2S service per NACE MR-01-75.
• CAMRAM™ top seals are standard for all Cameron VBRs.

VBR Packer

Ram Body

CAMRAM Packer

VBR Packer

Ram Body

Wear Pads

U and U II BOP Variable Bore Ram T BOP Variable Bore Ram

Shearing Blind Rams

Cameron shearing blind rams (SBRs) shear the pipe in the hole, then bend the lower section of sheared pipe to allow the rams to close and seal. SBRs can be used as blind rams during normal drilling operations. Features include:

• Large frontal area on the blade face seal reduces pressure on the rubber and increases service life.
• Cameron SBRs can cut pipe numerous times without damage to the cutting edge.
• The single-piece body incorporates an integrated cutting edge.
• CAMRAM™ top seals are standard for all Cameron SBRs.
• H2S SBRs are available for critical service applications and include a blade material of hardened high alloy suitable for H2S service.

SECTION 6 : WELL CONTROL EQUIPMENT

DVS rams are shearing blind rams which are similar to SBRs with the following features:

• DVS (double V shear) rams fold the lower portion of the tubular over after shearing so that the lower blade can seal against the blade packer
• DVS rams include the largest blade width available to fit within existing ram bores.

CAMRAM Top Seal Ram

Slide Packer Body ri

Lower SBR

CAMRAM Top Seal Ram

Slide Packer Body

Upper SBR

U and U ll BOP Shearing Blind Ram

CAMRAM Top Seal

Blade Insert Slide Packer

CAMRAM Top Seal

Lower SBR

Blade Packer

Lower SBR

Blade Packer

Upper SBR

Blade Packer Upper Blade Insert

Slide Packer acker ^ Screw 'Jl

CAMRAM Top Seal

Blade Packer Upper Blade Insert

Slide Packer acker ^ Screw 'Jl

Lower SBR

Lower Blade Insert

Lower SBR

Upper SBR

T BOP Shearing Blind Ram

U and U ll H2S BOP Shearing Blind Ram

Top Seal Upper Ram Body

Lower Ram Body

Top Seal Upper Ram Body

Lower Ram Body

Side Blade Packer Packer

DVS Shear Ram

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