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2. Casing (borehole) - Wikipedia

   en.wikipedia.org/wiki/Casing_(borehole)

   Drill pipe weight; Mud and additives; RPM and ROP; Tool joint coating; Well path and dogleg; The following are recommendations for preventative measures to minimize casing wear: Minimization of dogleg severity and expect real dogleg at least 1.5 times higher than the planned value. Usage of casing friendly tool joint materials.

3. Completion (oil and gas wells) - Wikipedia

   en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

   Within the tubing you can mount a combination of tools that will help to control fluid flow through the tubing. Gas lift well: gas is fed into valves installed in mandrels in the tubing strip. The hydrostatic head is lowered and the fluid is gas lifted to the surface. Single-well alternate completions: in this instance there is a well with two ...

4. Drill string - Wikipedia

   en.wikipedia.org/wiki/Drill_string

   Drill pipe makes up the majority of the drill string back up to the surface. Each drill pipe comprises a long tubular section with a specified outside diameter (e.g. 3 1/2 inch, 4 inch, 5 inch, 5 1/2 inch, 5 7/8 inch, 6 5/8 inch). At each end of the drill pipe, tubular larger-diameter portions called the tool joints are located.

5. Gas lift - Wikipedia

   en.wikipedia.org/wiki/Gas_lift

   The gas-lift mandrel is a device installed in the tubing string of a gas-lift well onto which or into which a gas-lift valve is fitted. There are two common types of mandrels. In a conventional gas-lift mandrel, a gas-lift valve is installed as the tubing is placed in the well. Thus, to replace or repair the valve, the tubing string must be pulled.

6. Hand pump - Wikipedia

   en.wikipedia.org/wiki/Hand_pump

   On the up stroke of the piston the foot valve opens and suction brings water into the pump head. On the following down stroke of the piston the valve on the piston opens up and allows water to flow above the piston. On the successive up stroke of the piston water is pushed out of the outlet. A rural handpump in Belgium.

7. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

8. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

9. Timing belt (camshaft) - Wikipedia

   en.wikipedia.org/wiki/Timing_belt_(camshaft)

   The main disadvantage is that belts wear over time, therefore belt replacement is recommended at specific intervals. [ 5 ] [ 6 ] Replacement of the engine's water pump at the same time is often recommended, since the water pump is also subject to wear and easily accessed during the replacement of the timing belt.