Un givedrawworks est le mécanisme de levage sur un derrick de forage. Il s'agit essentiellement d'un grand treuil qui contrôle la ligne de forage, la déroulant ou l'enroulant. Cette action soulève ou abaisse la tige de forage et le trépan, permettant ainsi les opérations de forage.
Instructions: Choose the best answer for each question.
1. What is the primary function of a give-drawworks on a drilling rig? a) To rotate the drill bit. b) To circulate drilling fluid. c) To raise and lower the drill stem. d) To control the drilling mud.
c) To raise and lower the drill stem.
2. What type of equipment is a give-drawworks most similar to? a) A crane. b) A pump. c) A winch. d) A generator.
c) A winch.
3. What is the drilling line used for in conjunction with the give-drawworks? a) To connect the drill stem to the drilling rig. b) To circulate drilling fluid. c) To power the drill bit. d) To provide communication to the drill floor.
a) To connect the drill stem to the drilling rig.
4. What is the primary mechanism used by the give-drawworks to control the drilling line? a) A hydraulic system. b) A pneumatic system. c) A mechanical system. d) An electrical system.
c) A mechanical system.
5. What happens when the give-drawworks is used to "give" the drilling line? a) The drill stem is raised. b) The drill stem is lowered. c) The drilling fluid is circulated. d) The drill bit is rotated.
b) The drill stem is lowered.
Scenario: You are working on a drilling rig. The drill stem has become stuck in the wellbore. You need to use the give-drawworks to try to free it.
Task:
**Steps to Free the Stuck Drill Stem:** 1. **Engage the give-drawworks:** Slowly apply tension to the drilling line, pulling upward on the drill stem. 2. **Observe and adjust:** Carefully monitor the tension on the line and the response of the drill stem. If there is no movement, gradually increase the tension. 3. **Apply "give" or "draw" as needed:** If the drill stem appears to be moving, gently "give" the line (lower the drill stem) to relieve some pressure. If the drill stem is not moving, try "drawing" the line (raising the drill stem) to create additional tension. 4. **Repeat the process:** Continue applying tension and adjusting the give-drawworks as needed until the drill stem is freed. **Potential Risks:** * **Damage to the drill string:** Excessive tension could cause the drill string to break or buckle. * **Damage to the wellbore:** Rough handling could cause the wellbore to collapse or be damaged. * **Equipment damage:** Improper use of the give-drawworks could damage the mechanism itself. * **Personal injury:** If not handled carefully, the drill stem or heavy equipment could cause injury to crew members. **Safety Precautions:** * **Clear the area:** Ensure everyone is clear of the drilling line and heavy equipment. * **Use proper lifting procedures:** Ensure the give-drawworks is properly calibrated and operated. * **Use protective gear:** Wear appropriate safety gear, such as hard hats, safety glasses, and steel-toe boots. * **Communicate clearly:** Maintain constant communication with other crew members to coordinate efforts.
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