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Floating jack‐up drilling rig «Krot»

Jack‐up platform «Krot» is designed for drilling of engineering‐geological boreholes on the shelf to the depth of 100 meters at the water depth from 2.5 to 18 meters. Moon pool 0.5×0.5 m in size is installed in the center of the platform; height of the drilling rig is 10 m. Floating jack‐up platform «Krot» is equipped with a four‐anchor stabilization system. This equipment allows performing any downhole investigations including logging operations and seismic sounding of soils.

Register data

Vessel name

Krot

IMO ID‐number

8763397

Registration number

845992

Shipowner

Pacific Engineering Company Ltd.

Port of registry

Korsakov, Russia

Flag

Russia

Year of manufacture

1984

Place of manufacture

Matsui, Japan

Type

Jack‐up platform

Employment

Drilling of engineering‐geological boreholes

Call sign

UFBW

Register class

KM R3

Ship‐classification society

Russian Maritime Register of Shipping

Specifications

Length, width, height

15.0 m х 15.0 m х 2.3 m

Draught

1.6 m

Displacement

Fully loaded — 344 t; empty — 147 t.

Capacity

Gross 153 r.t., net 125 r.t.

Diameter of the leg pad

2.4 m

Leg diameter

900 mm

Electrical equipment

2 x Generator DGP75M1, 75 kW.

Maximum water depth for drilling

18 m

Cruising area

R3 — nearshore navigation at the distance of 10 miles from the shelter during summer navigation period

Weather restrictions

Wave height — 6 m., wind speed — 20.7 m/sec

Accommodation capacity

8 persons

Rescue equipment

 

Life crafts PSN-10МК — 2, life jackets — 11, hydrothermosuits — 10, life rings — 4.

Deck machinery

Electrohydraulic crane

Carrying capacity 0.9 t х 1 pc.

Hydraulic winch

Carrying capacity 3 t х 2 pcs.

Anchor (type, quantity, weight)

- bow

- stern

 

Hall’s anchor, 2×900 kg.

Hall’s anchor, 2×900 kg.

Anchor ropes (length, calibre)

4×200 m, diameter 22 mm

Communication and navigation equipment

Receiver‐indicator of the navigation system

SPR-1400

VHF radio

STR-580D

Boomerang satellite radio buoy

SEP-406

Radar responder

Musson-502

VHF two‐way communication radio stations

STV-160, IC‐GM 1500

Drilling and geotechnical equipment

Drilling rig

URB-2А-2

Type

Hydraulic

Main drilling method

Straight rotary drilling

Feeding speed:

- downhole force

- upward force

 

2.6 t

4.0 t

Drilling depth

100 m with the tube diameter of 60.3 mm

Borehole diameter:

- original

- final

 

190/135 mm

76 mm

Hydro station drive

Electric

Power capacity

55 kW

Rotation speed

1500 rpm

Mast

Welded

Height of crown‐block axle

8.37 m

Mast winch

Hydraulic lift with a tackle block

Drill tube/stand length

Diameter 50 mm / 4.8 m

Rotating mechanism

Floating spindle

Rotary speed, direct drive

0–325 rpm

Maximum rotary moment

200 kgf·m

Lifting device

Hydraulic lift with a tackle block

Tackle system equipment

Special

Hook lifting speed

0–1,25 m/sec

Feeding type

Hydraulic with a tackle system

Feeding cycle

5.2 m

Drilling mud pump

2 x NB 12–63–40

Drive power

2×12 kW

Maximum flow (total)

12.2 h.p.

Maximum pressure

50 kgf/cm2