API RP 11AR-2000 pdf free download

API RP 11AR-2000 pdf free download.Recommended Practice for Care and Use of Subsurface Pumps.
3 History 3.1 The first formal work toward development of API Std 11A was in 1924. In that year, a Committee on Standardiza- tion of Pumping Equipment and Engines was organized. The first issue of API Std 11A, Specification for Cold Drawn and Machined Working Barrels for Sucker Rod Pumps was dated May 1926. 3.2 In 1956, a subcommittee on subsurface pumps approved in principle a proposal that a task group be appointed to carry out the assignment of developing complete API standard pumps with interchangeability of parts and sim- plified part numbering system for pump assemblies and com- ponent parts. This charge was the beginning of API Spec 11AX and the demise of API Std 11A. 3.3 The first printing of API Spec 11AX was in January of 1961. At the 1966 Standardization Conference, the Commit- tee on Production Equipment agreed that a task group be appointed to revise the diagrams of typical pumps and incor- porate them into a separate RP, Recommended Practice of Care and Use of Subsurface Pumps . The work of this task group culminated in the First Edition of API RP 11AR being published in 1968.
4.2 API full barrels are one-piece tubes, threaded at both ends. 4.3 Metal plungers may be one of one-piece or assembled construction. One-piece plungers generally have a hard plat- ing or coating, while assembled plungers have a hard sleeve supported by a plunger tube and end fittings. 4.4 TUBING PUMPS (FIGURE 2) a. The tubing pump is rugged in construction and simple in design. The barrel of a tubing pump is attached directly to the tubing string, usually at the bottom. Below the pump barrel is a seating nipple that receives and locks in place the standing value of the pump assembly. After this assembly has been run into the well and landed, the plunger assembly is run in on the sucker rod string. When the correct number of sucker rods and pony rods are run to allow the plunger assembly to fit into the pump barrel and seat the standing valve in the seating nip- ple, the plunger is ready for final spacing. b. The standing valve is run into the wall spacing to the bot- tom of the pump plunger by means of a standing valve puller. When the standing valve engages the seating nipple, it locks in place with either a mechanical lock or friction cups. The plunger may then be released from the standing valve by rotating the rod string counterclockwise. The plunger assem- bly is then raised to clear the standing valve on the bottom of the pump stroke, plus about a foot to compensate for rod overtravel. Final spacing is adjusted by the placement of the clamp on the polished rod. c. As the motion of the pumping unit causes the rods and the plunger to reciprocate, the pumping action begins. As the plunger starts the upstroke, the weight of fluid in the tubing causes the traveling valve to close. The upward motion of the plunger causes reduction of pressure in the pump barrel below the plunger and the pressure of fluid in the casing annulus then opens the standing valve, filing the void created by the upward movement of the plunger.
4.5 ROD PUMPS a. The rod pump is preferred over the tubing pump in the great majority of rod-pumped wells. The fact that the com- plete pump can be pulled with the sucker rod string without disturbing the tubing is the main reason for this preference. This reduces pulling unit time at the well by more than 50 percent over a tubing pump when both the barrel and plunger must be pulled. There are three types of rod pumps; the trav- eling-barrel, bottom-anchor (API RWT, or RHT), the stationary-barrel, bottom-anchor (API RWB, or RHB), and the stationary-barrel, top-anchor (API RWA, or RHA).