TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT TOÁN 2024 - TỪ CÁC TRƯỜNG, TRƯỜNG...
downhole equipment failure11 failure.ppt
1. 1
Downhole Equipment Failure
An interruption in planned operations
caused by drilling/evaluation tool failures
other than drillstring failures. Downhole
tool selection and operation is critical in
the reduction of tool failure.
2. 2
Downhole Equipment Failure
Downhole Tool Equipment Cycle
• Drilling engineer specifies equipment
• Drilling supervisors orders equipment
• Toolpusher inspects/checks equipment
• Driller picks-up and runs equipment
• Rig team make post analysis of equipment
3. 3
Downhole Equipment Failure
High Failure Rate Downhole Tools
Downhole Tool
• Roller cone bits
• Downhole motor
• Shock sub
• Drilling jar
• MWD/LWD
Failure
• Lost cones
• Motor stops drilling
• Seal washout
• Untrained personnel
• Dump valves or
software
10. 10
Downhole Equipment Failure
High Failure Rate Downhole Tools
Downhole Tool
• Logging
• Survey Equipment
• Speciality Equipment
• Packer/DST Tools
Failure
• No maintenance & last
minute changes to
programme,
inexperienced personnel
• Film/batteries/wireline
• Untrained
personnel/technology
• Leaks, no release, high
angle holes,
incompatibility
11. 11
Downhole Equipment Failure
Causes of Tool Failure
Cause
• Metal Fatigue
• Improper tool selection
• Improper tool operation
• Exceeded design limits
• Exceeded design life
Note
• Cyclic stress reversals
• Loads exceed design limits
incompatible with other
tools
• Untrained personnel,
inattention
• Accidental/intentional
overload
• Economic based, untrained
personnel
12. 12
Downhole Equipment Failure
Causes of Tool Failure
Cause
• Transportation/Handling
damage
• Hostile environment
• Design and manufacturing
Note
• Untrained personnel
• H2S/Co2, high temperature,
corrosive mud high angle,
hard abrasive formations
• Quality control has failed
13. 13
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Selecting the correct tool for the job can
significantly reduce tool failure. Following a
standardised tool selection procedure ensures
the right tool is selected.
14. 14
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Downhole Environment Wellbore Conditions
• Temperature limitations of
tools
• H2S or CO
• Corrosion resistance
• Oil resistant rubbers
• Hydrostatic pressure
• High angle limitations
• Hole size versus tool size
15. 15
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Tool Physical Properties Dimensions
• Length, OD and ID of tool
• Weight and grade
• Connection type
• Make-up torque
requirements, thread dope
• Stress relief features
16. 16
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Compatibility • Connections compatible
with other downhole
tools
• Will the tool work with
other equipment
17. 17
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Operations Operating Parameters
• Min/Max flow rate
• Min/Max operating pressure
• Torque/tension limits
• Max operating hours
• Tool operator
• Special handling
• Special instructions
• Operating manual
• Safety recommendations
• Settings and calibration
• Maintenance
18. 18
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Fishing Tool Fishing Methods
• Tool dimension diagram
• Required fishing tools
• Fishing records
• Fishing techniques
• Tool lost-in-hole consequences
19. 19
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Support • Back-up tools available
• Delivery time to rig
• Spare parts/availability
• Transportation problems
• Hazardous cargo
• Air transportation
• Deck space/deck load
20. 20
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Quality Control Reliability of the Tool
• New or rebuilt tool
• Hours since last
rebuild/inspection records
• Performance record of tool
from offset wells
• Performance record of tool
worldwide
21. 21
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Cost • Operational/standby
rental rates
• Repair agreements
• Lost in hole charges and
insurance
• Success/failure
performance rate
22. 22
Downhole Equipment Failure
Factors that Influence the Tool Selection Process
Limitations • Depth/external pressure
limitation
• Yield strength
• Drilling fluids, oil,
LCM, hematite
• Battery pack
23. 23
Downhole Equipment Failure
Following a standardised check-list when the
tool arrives on the rig ensures the correct tool
has been shipped and it was not damaged in
transit.
24. 24
Downhole Equipment Failure
Paperwork • Verify equipment quantities and
type
• Ensure serial/model numbers on
the tool agree with the order
form, cargo manifest and tool
inspection report
• Locate the operating manual,
special instructions, settings and
calibration sheet, tool
dimensions diagram and parts
list.
25. 25
Downhole Equipment Failure
Physical Condition • Damaged containers may
indicate a damaged tool
• Missing or damaged parts and
spare parts
• Thread protectors installed on
tools and crossovers
• Tool ports and other circulating
ports free of debris
• Explosive/corrosive tools are
clearly marked
26. 26
Downhole Equipment Failure
Operation • Function test valves etc
prior to running the tool
• Cross over subs are
correct
• Identify and mark new
technology tools
28. 28
Downhole Equipment Failure
Tool Failure Prevention
Topic
Unfamiliar New
Technology Tool
Recommendation
Hold a pre-job safety
meeting focused on the
safe and proper operation
of the tool. If a tool
operator is provided allow
the specialist to make the
presentation.
29. 29
Downhole Equipment Failure
Tool Failure Prevention
Topic
Operating manual
Recommendation
Make available to the Driller
an operations for each tool that
requires special operating
procedures, ie JARS
30. 30
Downhole Equipment Failure
Tool Failure Prevention
Topic
Awareness
and
Refreshers
Recommendation
Pre-tour safety meetings with a
written Tour Operations Plan.
Driller handover notes with
current/next operations section.
Discuss operations of unfamiliar
new technology tools
31. 31
Downhole Equipment Failure
Tool Failure Prevention
Topic
Tool Failure Report
Recommendation
When tool failure occurs file a
tool failure report to share the
knowledge of the failure and
preventative action taken. A
statistical data-base can be built
with this information
32. 32
Downhole Equipment Failure
Tool Failure Prevention
Topic
Service Equipment
Recommendation
Inferior service and tools provided
by supply companies can account
for a large number of tool failures.
