Inserted Type Downhole Pumps With Plungers Onshore Oil Well

Inserted Type With Plungers Onshore Oil Well Downhole Pumps

Inserted type onshore oil well downhole pump Description

Materials selection

API Spec. 11AX was modified to add not only new sizes and types of pumps with new quality, inspection, and tolerance requirements, but also standardized, widely used pump-component materials. Various material descriptions, their API identification symbol, surface condition, base core hardness, base material, and base-material minimum yield strength for plated barrels, are shown in Table A of Spec. 11AX. Similar tables in Spec. 11AX (B through I) are incorporated for case-hardened barrels, nonhardened barrels, balls and seats, cages, pull tubes, valve rods, fittings, seating cups, spray-metal plungers, and plated plungers. These changes have incorporated the prior information in API RP 11AR^[2] and the NACE International MR 01-76^[3] for materials to be used in most production environments.

Allowable setting depth

In the early 1990s, an industry task group analyzed the stresses that react on a downhole rod pump. This was required to determine if there were recommended allowable loads that could be subjected to rod pumps of different types, sizes, and metallurgy. This group developed the burst, collapse, and axial-loading equations to determine these limits and the associated maximum recommended setting depth for sucker-rod lift pumps, ^[4] published in API RP 11AR.^[1] The depth limitation and stresses on the downhole pump barrel and components should be considered when selecting the size, type, and metallurgy for a downhole pump.

Technical parameter list:

Features:

1. API 11AX standard

2. Stationary barrel

3. Heavy walled or thin walled barrel