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© 2011 Weatherford. All rights reserved. 1

Managed Pressure Drilling – New Convention in Deepwater Wells. Brian Grayson, Bhavin Patel, Alice Gomez

Weatherford International

June 18-19 2014 Vienna, Austria.

Weatherford’s Application of MPD System

2

How can I drill this well?

20

03

: In

du

str

y a

cce

pta

nce

of M

PD

2005: Application of offshore-PMCD in Asia

Offshore Evolution: 2005 - 2008

• Asia Pacific Pressurized Mud Cap Drilling (PMCD)

• Moved from Jack-up to floating rigs utilizing

conventional land based RCD systems (Riser Cap)

• Utilized a Model 7100 RCD installed on top of the

rigs collapsed telescopic joint.

Application & Lessons Learned

• Application of 7100 series RCD (Land

version) above telescopic joint.

• Limited application due to drill pipe size

limitation

• Use of manual or Semi-automatic chokes

• Manual system - Level of automation* = 1

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*Ref: Ensley et al, 1999 and Macpherson et al, 2013


5

How can I drill this

well?

How can I improve the

economics of this well?

20

03

: In

du

str

y a

cce

pta

nce

of M

PD

20

05

: A

pp

lica

tio

n o

f P

MC

D in

Asia

2008: Deployment

of first Marine

Based RCD System


• Deploy first marine

based RCD system

– 7875 Docking

Station deployed

above tension

ring (ATR)

• Self lubricated

bearing and remote

operated latch

removes need for

manual intervention

Scope of Application

• Bearing assembly I.D. of 8.88 inches

allows accommodates 6-5/8” drill pipe

• A Bearing Assembly Retrieval Tool (BART)

is used deploy and retrieve the Bearing

Assembly

• Application of Automated chokes and Early

kick detection & control.

• Level of Automation* = 3

7



8

How can I drill this well? How can I improve

operational safety?

How can I improve the

economics of this well?

20

03

: In

du

str

y a

cce

pta

nce

of M

PD

20

05

: A

pp

lica

tio

n o

f P

MC

D in

Asia

20

08

: D

ep

loym

en

t o

f firs

t M

arin

e B

ase

d R

CD

Syste

m

2013:

Industry’s first

API

monogramme

d RCD


BTR

DSIT

Flow

Spool

• Reduction of RCD Bearing

Assembly O.D. to 19.00” to

accommodate smaller riser

I.D.s

• Addition of MPD Buffer

Manifold to allow for

transition between Constant

Bottom Hole Pressure

(CBHP) and PMCD

RCD Assembly

Scope of Application

• Complete first API monogramed RCD

• Deploy first RCD below tension ring and below water line

• Integrated fit for purpose subsea MPD Riser Assembly: BTR RCD, DSIT, Flow Spool

• Full tensile capability of 3 million lbf.

• Level of automation* = 7

10


Case Studies: Indonesia

Asia Pacific region is prone to tectonic movement, underwater landslides,

heavily faulted and folded strata, lost circulation zones and uncontrolled

mud flows. The conglomerates, igneous, and carbonates prevalent in

this region present many drilling challenges.

Objective • Safely and efficiently drill exploration deepwater well

Results • Early kick detection and well-pressure management capabilities to

enable immediate completion of the drilling environment without any

safety or environmental issues

• Enabled drilling to proceed to target depth despite circulation issues

Current State

• Application of automated back pressure pump

• During connections pump ramp up schedules are

eliminated through automation.

• Improved modeling capabilities – real time

hydraulics modelling and heave correction for

better kick/loss detection.

• Improved kick tolerance via early detection and

automated control.

• Evaluate possibility for influx to be circulated

through riser. 12

Total Offshore Operations: 103

Operations from Fixed Rigs: 72

Operations from Floating Rigs: 31 (Total including land: 237) *as of 04/15/2014

Fixed=23

Floating=0

Fixed=3

Floater=3

Fixed=7

Floating=6

Fixed=12

Floater=7

Fixed=5

Floating =1

Fixed=17

Floating=14

Weatherford’s Offshore MPD Applications

Looking Ahead: 2014 Onward

Primary Focus : Process Safety improvement

through

Higher level of Automation

Training the “future crew”

Closed Loop Ready Solutions

• Integrated MPD riser joint

• Integrated automated MPD choke manifold

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Summary

• Closed Loop Drilling using RCD and automated

chokes provides better control over wellbore

hydraulics profile and becoming norm to drill

deep water wells.

• Lessons learned have provided valuable

feedback to improve reliability and level of

automation.

• Automated kick/loss detection and control

system is instrumental to meet well control and

process safety challenges of deep water wells.

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Thank You

Questions?

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brian grayson, bhavin patel, alice gomez …...brian grayson, bhavin patel, alice gomez weatherford...

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