Page 4 Flashcards
Cement Breakout Presentation
What Halliburton Tool is Used for Successful Whipstock Plugs
BHKA Cement hole kickoff assembly
What must happen to have a balanced plug
Fluid inside and outside must be the same density and height
What are different types of plug methods
Balance, Dumb bailer, 2 plug, modified 2 plug,
What causes failure for plugs with inverted wells
Spiraling and roping
What causes plug failure
- Impatience
- Poor mud removal
- insufficient volume
What are some concerns with swabbing a well
Collapse of Casing
Definition of Internal Yield Pressure
Amout of pressure before casing will burst
What is Squeeze Cementing
Process of applying hydraulic pressure to force or squeee cement into perforations and force filtrate water to create a solid mass known as a rope
What is A High Pressure Squeeze
Surface pressure+displacement fluid hydrostatic pressure+ cement slurry hydrostatic pressure= total bottom hole pressure greater than formation fracture pressure
What is A Low Pressure Squeeze
Surface pressure+displacement fluid hydrostatic pressure+ cement slurry pressure= total bottom hole pressure less than formation pressure
What is A Hesitation Squeeze
Concerned with gel strength development, false indication of squeeze pressure, difficulty reversing out, high pump pressure coule cause formation breakdown
Why is Pressure Applied on Annulus During Squeezes
To protect the casing from collapsing and to keep the packer set and in place
What Two Tool Selections Are There for Squeezes
Drillable, Retrievable
What are Two Types of Squeeze Method Placements and Definition
Packer- Isolates casing above therefore higher squeeze pressure can be applied. Pressure needs to be applied in order to prevent casing collapse
Causes for Job Failure
Pumping/mixing unit failure, bulk system failure, incorrect water pressure, human error
Causes for Cement Slurry Failure
Contaminated material, incorrect volume of mixing water, incorrect amount of chemicals
Causes of Cement Channeling Failure
Failure to centralize pipe, move pipe during the cementing job, circulate mud before cementing job
Definition of Densitometer
Devise installed on pumping truck manifold to measure the density of fluids
What Does The Recirculating Densitometer Do
Regulates the ADC
Purpose of A Vacuum Breaker
The relieve negative pressure
What are some features of Super Seal II High-Port Up-Jet Float Shoe
Improves mud displacement, provides excellent filter cake removal, up jets 60% of fluids volume
Reasons for Multi-Stage Cementing Equipment
Hydrostatic pressure too great for formation/casing, separate different types/blends of cement, or there is a limited pump time
What is a Poppet Valve
Most popular type of valve in the Halliburton Float Equipment, 2 3/4 and 4 1/4 sizes are available for the SSII
What is HMS Procedure for Cementing
Obtain casing/drill pipe burst/collapse pressures and safety factors to calculate max allowable pressure, not exceeding 80% of rated value of new pipe, obtain body yield strength of casing/drill pipe, do not exceed 56% of rated value of new pipe.
