CWD Quality Assurance & Improvement 5

Question 1

Which PDCA cycle step involves comparing actual well performance data against design specifications?

Accepted Answer

Check

Answer

The 'Check' phase of the Plan-Do-Check-Act cycle involves measuring and analyzing results against the planned objectives or specifications.

Question 2

A well screen collapses inward after installation. Which factor is most likely the root cause?

Accepted Answer

The screen wall thickness or collapse strength was insufficient for formation pressure

Answer

Screen collapse results from formation pressure exceeding the screen's rated collapse strength, typically caused by undersized screen wall thickness for the depth.

Question 3

What does ISO 9001 certification indicate about a well drilling company?

Accepted Answer

The company has a documented quality management system meeting international standards

Answer

ISO 9001 certifies that a company maintains a documented, audited quality management system consistent with international QMS standards.

Question 4

During quality review, a client reports intermittent turbidity in a well that was clear at completion. What investigation step should occur first?

Accepted Answer

Compare current pumping rate against the well's design yield and check for screen integrity

Answer

Comparing the current pumping rate to design yield and assessing screen condition identifies whether over-pumping or screen failure is mobilizing fines.

Question 5

A driller uses bentonite chips for annular sealing but the chips bridge before reaching the target depth. Which corrective technique resolves bridging?

Accepted Answer

Use a tremie pipe to place bentonite slurry instead of dry chips

Answer

Tremie-placed bentonite slurry bypasses the bridging problem by pumping the sealant through a pipe to the correct depth without relying on free-fall placement.

(CWD) Certified Well Driller Practice Test

(CWD) Certified Well Driller Practice Test

CWD Quality Assurance & Improvement 5