harsh environment semi-submersible drilling unit

HARSH ENVIRONMENT SEMI-SUBMERSIBLE

DRILLING UNITHUISMAN PRODUCT BROCHURE

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DRILLINGGENERAL INTRODUCTION

Huisman offers complete drilling packages and is dedicated

to explore and realise new solutions to improve drilling

efficiencies and reduce well costs. Our projects are typically

complex and innovative, requiring solution-aimed thinking,

technical excellence and partnerships with our clients.

This approach has resulted in a number of new valueadding

solutions and delivery of innovative and technically

challenging drilling equipment sets.

Huisman has in-house capabilities for vessel design. This

allows us to provide solutions in which vessel and equipment

are fully integrated, leading to radically improved designs for

drilling vessels. The first drillships based on these concepts

have proven to represent a major step change in our industry.

The unique combination of our in-house design and

engineering expertise, production facilities, testing capacity,

and installation locations, enables us to deliver custommade,

state-of-the-art equipment on a turnkey basis: in

time, with fully operational equipment from day one. All

Huisman products are designed and built in accordance

with international standards and certified by recognised

authorities such as ABS, API and DNV.

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DRILLINGGENERAL INTRODUCTION

Huisman has developed a new semi-submersible drilling

unit “Huisman HES”. This unit uses a novel type of floater

design suitable for extremely harsh environments and

has excellent motion characteristics. The unit consists of

a round floater, eight columns and a round deckbox. The

drilling system is enclosed to provide a sufficient and safe

working environment. Station keeping is achieved by a 12

point mooring system.

SEAKEEPING

The shape of the unit possesses a special feature which

makes the heave motions of the unit exceptionally low. The

water volume surrounded by columns has a tendency to

behave as a partially closed system, having a piston mode of

the vertical water motion. By optimizing the shape of the ring

pontoon the frequency of this piston mode motion is tuned in

such a way that this motion is in the opposite phase with the

motion of the water around the unit. In result the excitation

forces on the unit caused by this internal water column motion

and the motion of the surrounded water will compensate each

other. The heave motion of the unit remains very low.

STRUCTURAL INTEGRITY AND FATIGUE

The ring pontoon connecting the columns below and the

deck box connecting the columns on the top make the whole

structure very strong and robust. Even in very high sea states

the stress level in the primary structure is very low avoiding

any fatigue issues.

DRILLING

The unit with its integrated drilling equipment will be suitable

for:

Exploration and production drilling operations

Completions

Coiled tubing and wire line operations

Well intervention

Installation of X-mas trees

Well testing

HES

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HARSH ENVIRONMENT SEMI-SUBMERSIBLE DRILLING UNIT

HES

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The design of the unit focuses on Efficiency, Health, Safety

and Environment. The unit features a flat main deck, a drill

floor flush with the main deck and a Dual Multi Purpose Tower

(DMPT) allowing offline activities. Safe and simple material

handling is achieved by the flush main deck/drill floor, a cargo

elevator and a forklift corridor in the deck box. The design

of the drilling package focuses on drilling efficiency and

versatility. The drilling package is suited to accommodate the

latest drilling technologies, such as automated tripping.

INSTALLATION AND COMMISSIONING

Since the DMPT is a single integrated unit that houses all

equipment, the interface with the vessel is greatly simplified.

In combination with the Huisman substructure, that comprises

the complete drill floor, control cabin, drilling VFD’s and

HPU, the DMPT can be fully tested and commissioned on

our quayside. After the testing and commissioning phase

the DMPT can be installed with one single lift onto the

vessel, significantly reducing the time the vessel has to

stay at the quayside. This integrated approach allows both

Huisman and the shipyard to build the equipment and vessel

simultaneously. It also reduces the number and complexity of

the interfaces between the vessel and the equipment, which

reduces the time for installation and commissioning.

MAIN ADVANTAGES

The DMPT has a hinged floor and no V-door limitations.

Therefore, it is possible to skid the BOP (or X-mas tree)

underneath the floor when it is hinged and then lowered on

the construction side. The BOP is then skidded from the aft

to the forward well center by means of a skid cart that moves

along the moon pool under the substructure. This handling

eliminates the need for a high substructure. The enclosed drill

floor is flush with main deck allowing safer operations and

lower accelerations on the drill floor.

Traditional semi

Huisman HES

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

5 10 15 20 25 30

Heav

e RA

O [m

/m]

Period [s]

Traditional semiHuisman HES

Range of typical wave periods

HESHARSH ENVIRONMENT SEMI-SUBMERSIBLE DRILLING UNIT

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HES

7


HES

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DUAL MULTI PURPOSE TOWER

The vessels distinctive feature is the Dual Multi Purpose Tower

(DMPT). It has a welded box girder type load bearing structure

with a hoist on either side. One hoist is situated above the

well centre in the drill floor on the port side of the tower and

the other above the center in the construction floor on the

starboard side. There is no lattice type derrick structure

around the hoists, thus there is no V-door limitation, large

objects can be skidded or hoisted with the cranes directly to

the well centres or in the moon pool area.

The construction side is utilized for BOP and running of risers.

This can be done during drilling of the surface hole. Also

the handling of large subsea structures (X-mas trees) and

stand building is performed on the construction side. The

construction floor can be hinged in order to skid the SSBOP

or X-mas tree underneath. The structures can be lowered

into the water and the floor can be lowered to its’ original

elevation. This eliminates the need for a large substructure

height.

The DMPT also has some built-in redundancy, namely the

dual drum drawworks and the pipe handling system. Should

one of the winches fail the other can still operate the traveling

block at full load, however at half of the original speed.

Both well centres can operate from the two setback drums.

Therefore the system is still fully operational should one

pipe racker fail. Also the setback drums are outfitted with

redundant drives.


HES

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1. SPLITTABLE BLOCKS (2X)

Push button reeving change to increase

block speed when handling lighter

loads

2. PIPE HANDLING SYSTEM

Efficient pipe handling system with 2

setback drums and 4 pipe rackers.

Capacity for up to 10,000 m drill pipe

and 2,900 m casing.

3. DRILL FLOOR

Spacious drill floor fully enclosed by

wind walls

4. RISER TENSIONER SYSTEM

The system comprises 8 wire line type

riser tensioners mounted vertically

under the drill floor inside the deckbox

5. PASSIVE HEAVE CYLINDERS

Two large cylinders with accumulators

linked to the traveling block

6. DUAL DRUM DRAWWORKS

Dual drum system with 2 fast lines with

active heave compensation.

7. CONSTRUCTION FLOOR

The floor can be hinged upward to skid

large equipment underneath

8. SSBOP SKID CART

Brings the SSBOP into the firing line

9. MOONPOOL SKID CART

Travels with a complete riser or tubular

string hung off on cart between both

well centers

1

1

2

2 5

6

7

8

9

3

4


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GENERAL

Operational areaMaximum water depthMax. drilling depth from water lineClass notation

worldwide harsh environment500

10,000DNV or ABS

mm

164032,800

ftft

MAIN DIMENSIONS

Diameter deck boxDiameter under water pontoonsHeight of main deck above base lineDeck areaOperational draughtSurvival draughtDisplacement at operational draughtDeadweightOperational payload

86.0102.042.0

580023.021.0

59,80028,30024,000

mmmsq mmmmtmtmt

282335136

62,4007569

65,85031,15026,400

ftftftsq ftftftststst

MARINE SYSTEMS

Main engines Marine diesel oil tanksFresh water tanksComplementHelicopter deck, max. type helicopter

8 x 1,8253,500

900200

S-92, EH101 or similar

MWcu mcu m

8 x 2,45022,0005,600

HPbblbbl

CRANES

80t pedestal crane (2 off)Safe Working Load main hoistSafe Working Load auxiliary hoist

40t riser gantry craneHeight under girder (from main deck)

8015

9.0

mt at 14.5m radiusmt at 46.8 m radius

m 30 ft

DMPT

Drilling side rated load (under crown)Construction side rated load (under crown)Clear height both sides (under crown)Stand lengthOverall height above main deckFoot printPower drawworks drilling sidePower drawworks construction side

820820

61.0

66.08 x 7.2

2x2,3002,300

mtmtm

mmkWkW

18001800200135217

26 x 242x3,080

3,080

kipskipsftftftftHPHP

HEAVE COMPENSATION DRILLING SIDE

Max. capacity compensation systemMax. compensation stroke (AHC), 8 falls 550 [mt]Based on regular waves with 15 [sec] periodMax. compensation stroke (PC), 8 falls 550 [mt]

8207.0

6.0

mtm

m

1,80023

19.7

kipsft

ft

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PIPE HANDLING SYSTEMS

Max. capacity, total for 2 drumsSize of drill pipeSize of casing or drill collarTotal length of drill pipe, triple RIII, for 2 drumsTotal length of casing, triple RIII, for 2 drums

6803 1/2

710,3602,880

mtup toup tomm

1,5007

1634,0209,450

kipsinchinchftft

RISER TENSIONERS

No. of riser tensionersTotal installed capacityMax. total operational capacity (2 out of operation, 90%)

8615365

mtmt

1,350810

kipskips

SKID CARTS

Moon pool skid cart hang off capacityCapacity SSBOP skid carts (supporting the SSBOP)Capacity X-mas tree skid cart

600400100

mtmtmt

1,320880220

kipskipskips

MARINE DRILLING RISER

Diameter main tubeOuter diameter buoyancyDepth ratingRiser joint lengthStroke telescopic joint

1,400900

22.8619.81

mmmmm

2155

3,0007565

inchinchftftft

CHOKE AND KILL MANIFOLD

Pressure ratingNumber of chokes

1,0342 remote,

bar2 manual

15,000 psi

DIVERTER

Diverter housing internal diameterDiverter internal diameterDiverter pressure ratingOutlet ball valves size

1,53654069

406

mmmmbarmm

60.521 1/41,000

16

inchinchpsiinch

DIVERTER

Gumbo boxNumber of shakers (one mud cleaner)Number of degasserNumber of mud pumpsMud pump power (each)Mud pump pressureDual stand pipe manifold pressure ratingCement manifold pressure rating

1624

1,640520517

1,034

kWbarbarbar

2,2007,5007,500

15,000

HPpsipsipsi

HUISMAN EQUIPMENT BV

Admiraal Trompstraat 2

3115 HH Schiedam

P.O. Box 150

3100 AD Schiedam

The Netherlands

Harbour no. 561

Phone: +31 (0)88 070 2222

Fax: +31 (0)88 070 2220

E-mail: [email protected]

www.huismanequipment.com

072015

harsh environment semi-submersible drilling unit

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