MECHANICAL MAINTENANCE SCREWS, NUTS & BOLTS

MECHANICAL MAINTENANCE SCREWS, NUTS & BOLTS

OBJECTIVES 

This document aims to enable maintenance operators to differentiate between the different types of screws, bolts, nuts and washers which may be found on well sites.

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DEFINITION

  • A bolt is an assembly consisting of a screw and a nut (and possibly a washer). 

  • A bolt is a prestressed assembly. The mechanical traction maintained in the stem causes friction which prevents the rotation of the screw head and of the nut in terms of the fixed component. 

A bolt is defined with the following properties: 

  1. Those of its screw  
  2. Those of its nut 
  3. The common properties of the nut and screw

TABLES OF CONTENTS:
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  1. OBJECTIVES
  2. DEFINITION AND CHARACTERISTICS 
  3. GENERAL
  4. MATERIALS USED (in the oil industry)
  5. DIMENSIONS AND GEOMETRY
  6. STANDARDS
  7. TIGHTENING
  8. PROBLEMS FACED
  9. CONCLUSION
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4 Comments

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