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DRILLING / INTERACTIVE 3D

Surface blowout-preventer stack cutaway

Explore an original 87-part sectional stack with a hollow well path, separate annular element, retracted notched pipe rams, flat blind rams and two open side-outlet locations.

Static preview of the surface blowout-preventer stack cutaway schematic
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Drag to orbit · Scroll or pinch to zoom · Select a visible part or use the parts list. Keyboard: focus the view and use arrow keys to orbit.

HOW TO READ THIS MODEL

The system, explained.

A BOP stack is a combination of preventer units above the wellhead. The SLB Energy Glossary describes annular units commonly positioned above ram units and distinguishes pipe rams, which have matching half-circle openings for pipe, from blind rams used when no pipe occupies the bore. This original surface-stack teaching model places an annular element above two ram stages. The drillpipe remains in the open central space; both ram pairs are retracted, so the flat blind pair is not shown closing across pipe. Separate static actuator envelopes and two side-outlet locations make the component regions inspectable. The outer body walls, spool passages, pipe and annular element have real openings in the interactive mesh. The still reveals a facing cutaway; the interactive controls also expose the complete shell. Alberta drilling is governed by AER Directive 036, but this invented arrangement is not a proposed compliant stack or well-control method.

Model scope and limits

Original 87-part static teaching assembly at invented scale and pose. Complete axial body walls and drillpipe, separate annular packing element, two actual spool side passages, retracted notched pipe-ram blocks, retracted flat blind-ram blocks and actuator-location markers are modeled. The facing cutaway helps reveal their positions. Component proximity does not establish sealing contact, ram travel, shear capacity, hydraulic actuation, operating sequence, working choke or kill line-up, installed valves, accumulator, control system, locking, pressure integrity, test procedure, inspection state, well-specific stack selection, API certification, AER Directive 036 compliance or safe service. No OEM CAD, licensed artwork, dimensions or ratings were adopted.

Further reading: SLB Energy Glossary: general annular-over-ram stack roles; no source drawing, product geometry or dimensions reproduced ↗

Source links support further study; no affiliation or endorsement is implied.

CHECK YOUR UNDERSTANDING

Why are the flat blind rams shown apart while the drillpipe passes through the stack?

Choose an answer

GUIDED COMPONENT STUDY

Trace the system.

Read each explanation, then focus its component in the explorer. This is a learning route through the model, with no operating or maintenance sequence.

  1. Begin at the wellhead interface

    This lower hollow ring locates the illustration above a wellhead. It is not a connector profile, pressure class or selected wellhead fit.

  2. Read the entire pipe path

    One independent axial tube passes through the open static stack. It has an actual bore, but no tool joints, pipe grade, movement or pressure boundary are represented.

  3. Compare the annular element

    The separate upper ring has a real opening and remains clear of the illustrated pipe. It identifies a packing role without showing closure, contact pressure or tested sealing.

  4. Find the actuator region

    This independent ring marks a piston region only. There is no hydraulic circuit, accumulator, force or movement calculation.

  5. Inspect one pipe-ram notch

    A geometric half-circle is cut from each opposed pipe-ram block. Both blocks are retracted here; the visible gap is not a seal or proof of pipe-size compatibility.

  6. Compare the flat blind face

    The lower block has no pipe notch and is also retracted. It cannot be read as closed on the pipe that passes through this static scene.

  7. Look through a body opening

    The spool has two actual radial openings through a complete annular body wall. Their location alone does not provide a working choke or kill system.

  8. Stop at a side boundary

    The open side tube stops before selected valves, manifold, measurement or circulation equipment. The name is a role cue, not an operational line-up.

  9. Read the joint marker

    A separate annular ring and smooth stud markers identify a joint region. They establish no rated flange facing, fastener load, pressure test or Alberta compliance.

Additional primary references: SLB Energy Glossary: BOP stack arrangements and different preventer roles; no diagram reproduced ↗ · SLB Energy Glossary: annular packing role; no product geometry adopted ↗ · SLB Energy Glossary: half-circle pipe-ram opening; no product size adopted ↗ · Alberta Energy Regulator Directive 036: current drilling blowout prevention requirements; this model does not assess compliance ↗

Read this alongside drilling circulation.

Follow the separate pump, well and shaker map ↗

These original scenes answer different questions. Their proportions and positions are invented and do not describe a single rig or a tested pressure-control system.

ACCESSIBLE COMPONENT REFERENCE

Every part, in plain language.

Search all components ↗Model provenance ↗
Lower wellhead connector open wall

Illustrative wellhead interface with a genuinely open centre. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind-ram stage complete body wall

Lower ram body with a complete axial opening. Blind blocks are retracted in this static view. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Side-outlet spool complete wall

Open spool role between ram stages; side locations do not define a well-control line-up. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe-ram stage complete body wall

Upper ram body with a complete axial opening. Notched blocks remain apart in this static view. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular-preventer complete body wall

Upper annular unit housing around a separate packer region. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Open upper adapter

Open top adapter role without selected return piping. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular elastomer packing ring

Schematic annular packing region shown uncompressed; no seal is modeled. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular piston-region marker

Separate annular piston location; there is no hydraulic cylinder or motion calculation. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Complete hollow drillpipe marker

Independent open drillpipe segment passing through the retracted stack; no tool joint or selected tubular. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular packing upper edge cue

Edge cue for the uncompressed packing region. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead open flange ring

Separate annular joint-location cue with a real central bore; no rated facing or gasket. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 1

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 2

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 3

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 4

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 5

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 6

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 7

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Wellhead smooth stud marker 8

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram open flange ring

Separate annular joint-location cue with a real central bore; no rated facing or gasket. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 1

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 2

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 3

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 4

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 5

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 6

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 7

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Lower Ram smooth stud marker 8

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool open flange ring

Separate annular joint-location cue with a real central bore; no rated facing or gasket. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 1

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 2

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 3

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 4

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 5

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 6

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 7

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Spool smooth stud marker 8

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram open flange ring

Separate annular joint-location cue with a real central bore; no rated facing or gasket. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 1

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 2

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 3

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 4

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 5

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 6

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 7

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Upper Ram smooth stud marker 8

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular open flange ring

Separate annular joint-location cue with a real central bore; no rated facing or gasket. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 1

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 2

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 3

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 4

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 5

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 6

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 7

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Annular smooth stud marker 8

Separate smooth fastener marker without thread, torque or retained-pressure qualification. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left ram block

Flat blind-ram face with no pipe opening; shown retracted with pipe in the bore. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left face seal location

Distinct seal-location marker, not a working elastomer profile or tested contact. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left hydraulic cylinder envelope

Open actuator-envelope wall outside the ram body; no hydraulic system is modeled. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left piston rod marker

Separate static rod location between ram block and actuator envelope. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left bonnet location

Separate bonnet-envelope location with no engineered latch or pressure joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram left actuator cap cue

Actuator end cue with no fluid ports or pressure rating. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right ram block

Flat blind-ram face with no pipe opening; shown retracted with pipe in the bore. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right face seal location

Distinct seal-location marker, not a working elastomer profile or tested contact. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right hydraulic cylinder envelope

Open actuator-envelope wall outside the ram body; no hydraulic system is modeled. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right piston rod marker

Separate static rod location between ram block and actuator envelope. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right bonnet location

Separate bonnet-envelope location with no engineered latch or pressure joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Blind ram right actuator cap cue

Actuator end cue with no fluid ports or pressure rating. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left ram block

Opposed pipe-size notch with a real geometric half-bore. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left face seal location

Distinct seal-location marker, not a working elastomer profile or tested contact. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left hydraulic cylinder envelope

Open actuator-envelope wall outside the ram body; no hydraulic system is modeled. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left piston rod marker

Separate static rod location between ram block and actuator envelope. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left bonnet location

Separate bonnet-envelope location with no engineered latch or pressure joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram left actuator cap cue

Actuator end cue with no fluid ports or pressure rating. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right ram block

Opposed pipe-size notch with a real geometric half-bore. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right face seal location

Distinct seal-location marker, not a working elastomer profile or tested contact. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right hydraulic cylinder envelope

Open actuator-envelope wall outside the ram body; no hydraulic system is modeled. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right piston rod marker

Separate static rod location between ram block and actuator envelope. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right bonnet location

Separate bonnet-envelope location with no engineered latch or pressure joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Pipe ram right actuator cap cue

Actuator end cue with no fluid ports or pressure rating. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Conceptual choke-side outlet open nozzle

Side-outlet role with an open tube; no valve train, manifold or actual hydraulic connection. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Conceptual choke-side outlet flange cue

Facing cue around a real open nozzle; no rated joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Conceptual kill-side outlet open nozzle

Side-outlet role with an open tube; no valve train, manifold or actual hydraulic connection. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Conceptual kill-side outlet flange cue

Facing cue around a real open nozzle; no rated joint. Invented teaching proportions and static pose; no OEM geometry, seal integrity, actuator force, pressure rating, certification, well-specific configuration or operational sequence.

Display support -1.72 -1.02

Visual pedestal only, without structural design.

Display support -1.72 +1.02

Visual pedestal only, without structural design.

Display support +1.72 -1.02

Visual pedestal only, without structural design.

Display support +1.72 +1.02

Visual pedestal only, without structural design.