3 2 well control eq

Network of Excellence in Training

Well Control
Equipment

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Blow-out Preventers
Basic Set Up
BOPs are rated
by API as;
3M (3000 psi),
5M,
10M and
15M,
for HPHT wells;
15M or
20M,
2

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Annular

3

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Annular

4

1.

Packing

2.

Head

3.

Aux.close

4.

Seal

5.

Chamber-C

6.

Piston

7.

Chamber-O

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Annular
Open

5

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Close

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Pipe rams

Pipe rams are designed to close and seal on one specific siz
of pipe, and are also used for "hang-off.

6

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Pipe rams
With hang-off, the ram is used to suspend pipe
or casing by closing underneath a tool joint.
The recommended procedure for emergency
hangoff of drill pipe is to close the rams with
1,500 psi up to 3,000 psi, lock the ram locks
using the normal procedure, and then
transfer the drill pipe weight to the rams.

7

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Pipe rams
Pipe rams‘ hang off suspension capacity
varies with the size of the ram.

8

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Rams

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Rams

1
0

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Rams
Blind Rams

Pipe Rams

1
1

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Rams
Shearing Blind Rams
Shearing blind rams (SBRs) are dual-purpose rams that have been
proven over many years of field service.
Under normal operating conditions, they are used as blind rams to
seal in an open hole. When used as a blind ram, the blade packer in
the upper shear ram seals against the front face of the lower shear
ram. In an emergency, SBRs are used for shearing.

1
2

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Rams
Shearing Blind Rams

1
3

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Rams
Dual String (DS) Shearing Blind Ram
The dual string shearing blind ram, also known as the DS Shear Ram
was originally designed to shear larger diameter tubulars or
multiple tubing strings, regardless of their orientation to the
centerline of the ram bore.
With the DS Shear Ram, after the pipe has been sheared, the lower
pipe (or "fish") is housed in a vertical pocket. The blade face seal
provides a seal between the horizontal faces of the upper and lower
blades.

1
4

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Rams
Dual Shear Rams

1
5

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Rams
Variable Bore Rams

1
6

1.

The Variable Bore Ram, or VBR, seals on several sizes of pipe
or hexagonal kelly within its specified size range. A typical
range is from 5" to 3-1/2" diameter Other size ranges, such as
7" to 4-1/2" diameter, are available upon request.

2.

VBRs are not intended for long-term stripping use.

3.

"Stripping" refers to moving drill pipe vertically within the
well while the BOPs remain closed, maintaining a seal around
the pipe.

4.

During stripping, the drill pipe and larger diameter tool joints
are pulled through the packers in fully closed rams. This
procedure is typically used in workover and servicing

operations using annular BOPs and specialty rams.
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Rams
Variable Rams

1
7

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Rams
Variable Rams

1
8

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HCR Valve

1
9

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HCR Valve
The HCR pressure operated gate valve is a flowline valve requiring
relatively low operating pressure. It is a single ram, hydraulic gate valve.
The closing ratio of well pressure to hydraulic operating pressure is
approximately 8:1.

Should the the HCR
valve be used as the inner
or outer kill valve on the
the BOP stack?

2
0

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Accumulator Unit

2

1

1.

The purpose of the unit is to operate and control equipment to
safely control kicks and prevent blowouts during drilling and
workover operation

2.

The prime function of this unit is to provide and store the
fluid supply for the pumps and the high-pressure operating
system that operates and controls the BOP stack.

3.

A Blow-Out Preventer (BOP) control system is a highpressure hydraulic power unit fitted with directional control
valves.

4.

Accumulator or Accumulator unit consist of electric pumps,
air pumps, hydraulic control panel, air operated control
panel, valves, accumulator bottles and reservoir tank.
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Accumulator Unit

Bottles

2
2

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Accumulator Unit

Pipings & Gauges

2
3

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Accumulator Unit
Bank of Accumulators

2
4

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Accumulator Unit
Sizing

Usable Volume = Vb-Va
2
5

Precharged

Fully

Used

Charged

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