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Drill tech > Dril tech > Flashcards

Dril tech Flashcards

1
Q

Type of drilling rig

A

land and marine rigs
land - light land rigs, heavy land rigs, and helicopter portable rigs
marine - floating rigs and bottom supported rigs
floating rigs - semi submersible, drill ships, drilling barge
bottom supported rigs - jackup, platform and submersible

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2
Q

Is a drilling rig which is specially designed to drill holes on onshore locations

A

land rig

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3
Q

Its main features are portability and maximum operating depth

A

land rig

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4
Q

Land rig components

A

mud pumps, mud tanks, draw works, top drive/rotary table, mast/derrick, drill string, primary power generation equipment and auxiliary power generation equipment

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5
Q

Key differentiation factors in drilling rigs

A

lifting capacity, horsepower, number of mudtanks and power and ability to circulate drilling fluid, size

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6
Q

Main features of land rigs

A

portability and maximum operating depth

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7
Q

Are built so that the derrick can be moved easily and reused for drilling new holes

A

land rig

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8
Q

Various rig components are _________ so that the rig can be moved in units and connected easily

A

skid mounted

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9
Q

Is assembled on the ground with pins and then raised as a unit using the rig hoisting equipment

A

jackknife, cantilever and derrick

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10
Q

Crew members can move land rig on ____…

A

truck, tractor, helicopter, heavy rolling gear

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11
Q

_____ can be moved pretty simple compared to ______

A

small land rig ultraheavy land rig

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12
Q

Price of oil rigs for land drilling in us

A

18M usd to 20M usd and can rise to 25M usd

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13
Q

Light Duty Rig Depth feet _____ Meter _____

A

3k to 5k 1k to 1.5k

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14
Q

Medium Duty rig Depth feet _____ Meter _____

A

4k to 10k 1.2k to 3k

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15
Q

Heavy duty rig Depth feet _____ Meter _____

A

12k to 16k 3.5k to 5k

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16
Q

Ultra heavy duty rig Depth feet _____ Meter _____

A

18k to 25k 5.5k to 7.5k

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17
Q

is a large stucture or on in water with facilities to drill wells, extract and process oil and natural gas and to temporarily store product until it can be brought to shore for refining and marketing

A

offshore rig

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18
Q

4 stages of rigs

A

exploration stage, appraisal stage, development stage, production stage

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19
Q

rigs are used to drill exploration wells and ‘wildcat’ wells for potential hydrocarbon bearing geologicaal structures after various geological studies and seismic surveys have identified locations in which these structures could be placed

A

exploration stage

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20
Q

rigs are used to drill several wells to understand flow rates and reservoir dynamics and to determine the size and limits of the reservoir in order to confirm the assumption that hydrocarbons can be produced economically

A

appraisal stage

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21
Q

rigs are used to drill wells to depth of a productive zone of the reservoir

A

development stage

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22
Q

rigs are used to drill more wells, also known as repair/work-over wells, to fix existing wells

A

production stage

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23
Q

this practice is also known as infield driling depending on the complexity of the job, asmaller work-over rig may be used for a work-over program to repair wells, enhace production or provide other well treatments

A

production stage

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24
Q

types of offshore rigs

A

workover, floaters and bottom supported
floaters = semi submersible and drill ship
bottom supported = jack up and platform
jack up = standard, high specification and harsh environment

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24
Q

types of offshore rigs

A

workover, floaters and bottom supported
floaters = semi submersible and drill ship
bottom supported = jack up and platform

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25
Q

key differentiation factors in offshore drilling rigs

A

rated water depth, drilling depth, leg length (for jack-ups), accomodation, lifting capacity, top drive system, number of mud pumps and the power and ability to circulate drillign fluid

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26
Q

offshore platforms can be categorized in two types

A

bottom supported and vertically moored strucutres
floating production and subsea systems

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27
Q

fixed structure that extend to the seabed

A

steel jacket, concrete gravity strucutre, and compliant tower

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28
Q

the rigs floating platform is towed into position by barges then lowers it support legs down to the sea

A

jack-up rig

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29
Q

the platform can then be adjusted to varying heights along its tall legs, essentially using the same principle employed by a tire jack

A

jack-up rig

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30
Q

jack up rigs were tradionally used in _______________ because it wasnt practical to lower their legs to great depths

A

shallow water

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31
Q

jack up rigs can only work in water depths less than the lenght of their legs, typically limiting operations to _______

A

less than 150 meters/500 feet

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32
Q

this structure is reliant on its own weight, and the capability of the seabed to maintain that weight in order to remain stable

A

gravity type platforms

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33
Q

they are designed particularly with storm conditions in mind, like other types of structure, they come in multiple design variations, and may be made out of concrete, steel or a combination of the two

A

gravity type platforms

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34
Q

these were first used in the ekofisk field off norway, although the design principle had previously been used in lighthouse construction

A

concrete gravity structures

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35
Q

can be used in water up to 160 meters and with weights of over 300 000 tonnes

A

concrete gravity structures

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36
Q

concrete gravity structures can be used in water depths up to _____ and weight of over ________

A

160 meters and 300 000 tonnes

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37
Q

is the biggest oil rig in the world

A

berkut oil rig

38
Q

berkut oil rig weight

A

200 000 tons

39
Q

where is berkut oil located

A

Russian pacific coast just north of japan

40
Q

berkut oil extracts about ________ per year

A

4.5 million tons of oil per year

41
Q

berkut oil rig is built to exploit the oil reserves of…

A

arkutun-dagi field

42
Q

estimated oil reserves of akutun dagi field

A

72 million tons

43
Q

akutun dagi field spreads ______ from the russian coast

A

60 km

44
Q

what does berkut mean in russian

A

golden eagle

45
Q

cost estimation to builf berkut oil rig

A

12 billion usd

46
Q

how many wells are drilled in berkut, how many are oil poducing and how many are the water injection, and how many are cutting reinjection well

A

45 wells, 28 oil producing, 16 water injection, and 1 cutting reinjection well

47
Q

where do they process the oil extracted from berkut

A

chaivo onshore processing facility

48
Q

after being process at chaivo processing facility is is tranported and exported at? it is also the largest oil terminals in the far east.

A

dekastri oil export terminal

49
Q

what type is the berkut oil rig built on?

A

gravity based strucutre

50
Q

the berkut oil is fixed at the seabed at a depth of?

A

35 meters

51
Q

The berkut oil was built at?

A

vostichny port in eastern russian

52
Q

how much is the esstimated concrete and steel bar used to build berkut

A

52 000m^3 of concrete and 27 000 tons of steel bar

53
Q

the rig has been designed to withstand temperatures as low as?

A

-44 degrees celsius

54
Q

this protective belt will also brace the berkut rig against waves up to?

A

18 meters high

55
Q

are similar to fixed platforms, since both are anchored to the seabed and hold most of their equipment above the surface.

A

compliant tower

56
Q

are taller and narrower and unlike fixed platforms, they sway woth the wind and water almos as if they were floating

A

compliant tower

57
Q

compliant tower are stong enough to wothstand _____ conditions

A

hurricane

58
Q

compliant tower water depths range

A

1500 feet to 3k feet (450 to 900 m)

59
Q

deepest compliant tower? what is the depth?

A

chevron petronius with 623m

60
Q

the first compliant tower emerged in the early 1980’s with the installation of?

A

exxon’s lena oil platform

61
Q

are similar ro barge rigs but suitable for open ocean waters of relative shallow depth

A

submersible drilling rigs

62
Q

the drilling structure is supported by the large submerged pontoons that are flooded and rest on the seafloor when drilling.

A

submersible rig

63
Q

is a larger version of a posted barge and is capable of water depths of 18 ft to 160 ft

A

submersible rig

64
Q

they are the most common type of offshore drilling rigs, combining the advantages of submersible rigs with the ability to drill in deep water

A

semisubmersible rig

65
Q

rig that does not rest on the seafloor.

A

semisubmersible rig

66
Q

this rig is a floating deck supported by submerged pontoons and kept stationary by a series of anchors and mooring lines, and , in some cases, position-keeping propellers

A

semi submersible rig

67
Q

semisubmersible can be used in depths

A

from 200 to 1800 meters

68
Q

two types of semisubmersible

A

bottle type semisubersible and column-stabilized semisubs

69
Q

are mini tension leg platforms of relatively low cost, used in water depth between 200 and 1000 meters

A

seastars platforms

70
Q

these can be utilized as utility,satellite or eraly production platforms for larger deep water discoveries.

A

seastars platform

71
Q

it consist of a floating surface strucutre held in place by taut, vertical tendons connected to the seafloor

A

tension-leg platform

72
Q

has long, flexible legs that allow for significant side to side movement, with little vertical movement

A

tension-leg platform

73
Q

normally used for the offshore production of oil or gas, and is particularly suited for water depths greter than 300 meters and less than 1500 meters

A

tension-leg platform

74
Q

the use of this platform has also been proposed for wind turbines

A

tension-leg platforms

75
Q

are among the largest offshore platforms in use

A

spar platform

76
Q

consist of a large cylinder supporting a typical fixed rig platform. the cylinder however does not extend all the way to the seafloor, but instead tethered to the bottom by a series of cables and lines

A

spar platform

77
Q

Has a large cylinder that serves to stabilize the platform in the water, and allows for movement to absorb the force of potential hurricanes

A

spar platform

78
Q

about 90 percent of its overall structure is hidden underwater

A

spar platform

79
Q

are available at depths up to 3000 feet, but existing technology can extend this to about 10000 feet, making them one of the deepest-drilling types of offshore rigs in use

A

spar platform

80
Q

are most often utilized for extremely deep water drilling at remote locations

A

drillships

81
Q

a drillship must maintain its position at the drilling position by using

A

anchors and mooring lines or computer controlled dynamic position equipment

82
Q

Most have greater storage capacity than other types of rigs, allowing efficient operation at remote locations.

A

drillships

83
Q

have extensive mooring or positioning equipment, as well as a helipad to recieve supplies and transport staff

A

drillships

84
Q

drillships work in water depths ranging from

A

2k to more than 10k feet (610 to 3048 meters)

85
Q

are differentiated from other offshore drilling units by their easy mobility.

A

drillships

86
Q

facilities are tailored to achieve weight and space saving incorporates process and utility equipment

A

topside

87
Q

accomodation for operating personnel

A

topside

88
Q

crane for equipment handling and helipad

A

Topside

89
Q

used to tie platform in place

A

moorings and anchors

90
Q

material of moorings and anchors

A

steel chain, steel wire rope, and synthetic fiber rope

91
Q

It is the pressure exerted by a drilling fluid at equilibrium at a given
point within the drilling fluid due to the force of gravity

A

hydrostatic pressure

92
Q

factors that affect hydrostatic pressure

A

density of mud and true vertical depth

Drill tech (3 decks)

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