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Cementing II Final Written Test Study Material > Page 2 > Flashcards

Page 2 Flashcards

Cement Breakout Presentation

1
Q

What is Dual Spacer/Water Based Spacer

A

Turbulent Flow Spacer, made with fresh water or brine water, usuable with any mud type, density range is 9.2 PPG to 22 PPG and can be used in a tempature range of 60 to 550 degrees F

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2
Q

What is BWOB

A

By weight of blend

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3
Q

What is BWOW

A

By weight of water

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4
Q

What is BVOW

A

By volume of water

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5
Q

What is FLECS

A

Flexible Electronic Control System

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6
Q

What is SKD

A

Skid Diesel

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7
Q

What is SKE

A

Skid Electric

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8
Q

Why Do We Use Foam Cement

A

Wellbore formatin cannot withstand the hydrostatic pressure of the fluid column without breaking down thus we foam the cement.

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9
Q

What are the Physical Properties of Foam Cement

A
  1. Low cement density
  2. High viscosity
  3. Low permeability
  4. High compress strength
  5. Stable at High Temperatures
  6. Highly Elastic
    Foam cement is an extremen lightweight system used for cement slurries in order to prevent formation breakdown and gas migration
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10
Q

What if Foam Cement is Brought Back to Surface without Backside Pressure Applied

A

N2, Foam, Cement Blowout

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11
Q

Common Cement Types

A

Class A and B used in shallow wells
Class C- High early strength for shallow wells
Class G- High Strength cement used world wide
Class H- High Strength mainly used in US.

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12
Q

Describe Retarders as Additives

A

Primary Function- Retarders delay setting time of cement slurries
Secondary Function- Dispersant properties

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13
Q

What is micromatrix cement

A

Ultra fine retarder cement that repairs tight casing leaks, squeezes of off gravel packs, penetrates small channels

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14
Q

What do Accelerators Do To Cement Slurries

A

Increases early strength development and reduces WOC time.

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15
Q

What is the Most Widely Used Accelerator

A

Calcium Chloride- Used up to 1-4% BWOC

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16
Q

What Additive Serves Both As An Accelerator and Retarder

A

Sodium Chloride- Promotes early setting in low percentages (1%-12% By Weight Of Water).
(18%-37%) acts as a retarder for low/moderate tempatures

17
Q

Is Sea Water An Accelerator

A

Yes- causes acceleration when used as mixing water, contains 1.5%-2% soluble Chlorides

18
Q

What is The Most Radical Accelerator Used

A

Cal Seal- When used radicaly accelerates setting time for slurries, increases viscosity, 5%-90% BWOC.

  • Retards with Sodium Citrate
  • Used when cementing in permafrost because it imparts thixotropicaly
19
Q

Describe Bentonite (Halliburton Gel)

A
  • Lightweight additive
  • Colloidal clay which swells on contact with water to 10 times its original volume
  • Low cost additive used to reduce slurry weight to 12-13 pounds per gallon
20
Q

Describe Fluid Loss Additives Such As Latex 3000

A

Controls gas leakage, suspension aid, promotes good bonding, provides acid resistance, improves shatter resistance

21
Q

Describe Halliburton Silicates

A

Used as effective accelerators and lightweight additives

22
Q

What is Pozmix A

A

Comes from fly ash, pozealomic material, lightens slurry weight/density, enhances pumpability, reduces permeability, promotes bonding, reduces sulfate attack, improves chemical resistance, decreases slurry cost, resist corrosion to seawater

23
Q

Decribe Silicalite

A

High surface area silica, extender for lightweight cement, compressive strength enhancer, thixotropic tendancies

24
Q

Describe Spherelite

A

Hollow inorganic spheres used as a light weight additive

25
Q

Describe 3 M Glass Beads

A

Man-made hollow spheres, stronger than spherelite, lightweight additive

26
Q

Describe Poly-E-Flake

A

Loss circulation additive

27
Q

Describe SCR-100

A

Non-Lignosulfonate retarder, consistant response, dispersing effects, synthetic cement retarder

28
Q

Describe SSA-1 (Silica Flour)

A

Fine lines increase viscosity, strength stabilizer at 230 degrees or greater

29
Q

Describe CFR-3

A

Reduces water requirements, lower rheological properties, improves fluid loss, dispersant

30
Q

Describe HR-5

A

Cement retarder, modified sodium liqnosulfonate

31
Q

Describe Liqnosulfante

A

Used to make most Halliburton retarders

Cementing II Final Written Test Study Material (4 decks)

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