Casing and Cement Quiz

Question 1

what are the 4 types of casing?

Answer 1

conductor, surface, intermediate and production

Question 2

what are the 4 main criteria for casing design?

Answer 2

1. Selection of casing grades
2. Selection of casing size
3. Setting Depth
4. Fracture gradient

Question 3

what are the 3 types of threads?

Answer 3

short rounded, buttress, extreme line

Question 4

what is a LOT and what is it used for?

Answer 4

Leak Off Test and it is used to find formation strength

Question 5

what is a FIT and what is it used for?

Answer 5

Formation Integrity Test and is used to test formation and shoe strength

Question 6

what pressure is P-110 casing rated for?

Answer 6

110,000 psi

Question 7

what are the 3 functions of casing?

Answer 7

prevention, isolation and support

Question 8

what is cement slurry?

Answer 8

cement, water and additives

Question 9

what are the primary forces on casing?

Answer 9

burst (internal pressure greater than external) and collapse (external pressure greater than internal)

Question 10

what are secondary forces on casing?

Answer 10

buckling, bending, axial compression and torque

Question 11

what are the 3 conditions casing must be able to withstand?

Answer 11

tension, burst and collapse

Question 12

what are 3 casing failure mechanisms?

Answer 12

corrosion, shear and collapse

Question 13

how do you calculate a pressure gradient?

Answer 13

=pressure/depth

Question 14

what are considerations when it comes to casing set depth?

Answer 14

geological information, offset well data, hole section summaries and pore pressure/fracture gradient

Question 15

what is a liner?

Answer 15

casing strings that do not extend to surface

Question 16

know how to use formulas

Answer 16

duh

Question 17

what are the 4 pipe collapse calculations?

Answer 17

yield strength pressure, plastic pressure, transition pressure and elastic pressure

Question 18

what are the 5 physical properties of cement?

Answer 18

slurry density, yield, thickening time, compressive strength, and additives

Question 19

what is the difference between primary and secondary cement?

Answer 19

primary is initial cement pumped downhole, and secondary is repair cement

Question 20

name 5 of the 9 pieces of equipment used for a cement job

Answer 20

cementing head, centralizer, scratcher, float collar, float shoe, bottom plug, top plug

Question 21

what does the cement physically do?

Answer 21

bonds the casing to the formation

Question 22

what is the most popular class of cement?

Answer 22

Class G: surface to 2438m (can be used with accelerators and retardants)

Question 23

what classes of cement are best for HPHT

Answer 23

Class J

Question 24

what are the 2 slurry properties?

Answer 24

specific gravity and absolute+bulk volume

Question 25

what is the factor for finding dry weight of cement? water?

Answer 25

dry cement=slurry volume/0.76

water needed=slurry volume x 0.44