wireline unit.Īdjustable gear box Possible 16,000' for Crooked holes Mist of droplets, with the droplets traveling close to the speed of the ga.Ĭan use gas or Crooked hole ( 150 bpd). The selection stra.nĪ gas well with high reservoir pressure and a high gas production rate carries liquid from bottom hole to the surface as a fine Real life data acquired at the field trials was used to validate model results. Techniques were applied to evaluate the lowest bottom hole flowing pressure for various Artificial Lift system types and The results of these and related studies will be discussed in the paper. Targeted studies were conducted to verify/improve check-valve reliability, gas handling, elastomer suitability, and cable-corrosion resistance. The WLPDP system was able to meet the design-volume/pressure specifications in all orientations, as confirmed through laboratory and integration testing. The intake/discharge check valves and bladders are the only internal pump components that contact the wellbore fluids. Produced gas flows in the annulus between the tubing and production casing. When each bladder expands, it pressurizes inlet-wellbore liquids, pushing them out of the well. The piston pump circulates a dielectric oil between two bladders by means of a switching valve. The cable powers a direct-current (DC) motor that drives an axial piston pump. and powered with a standard wireline (WL) logging cable. The 2.25-in.-outer-diameter (OD) pump is deployed through tubing. The WLPDP was designed to meet the established specifications and boundary conditions. Finally, the pump should be able to handle a variety of wellbore liquids, produced gases, and limited solids. The system should use as many off-the-shelf components and known technologies as possible to reduce development costs and encourage integration. The majority of new onshore wells have tortuous geometries, so the system must be able to function at the desired depth despite them-without damaging associated downhole components. Pumps fail and replacement costs can drive economics, so the system must be deployable/retrievable through tubing.
The pumping system must be cost-effective to be a viable solution, which led to several design boundaries. The resulting goal was a pump that could deliver 30 BFPD from 10,000-ft true vertical depth (TVD). The primary target was gas wells, although “stripper” oil wells were also considered. Internal and industry-wide data were first reviewed to determine what WLPDP specifications would address the majority of late-life wells. The WLPDP development began with the constraints of late-life wells with the goal of addressing reserves that conventional AL methods would struggle to produce profitably. Pumps for late-life wells have mostly been repurposed from these applications and optimized for reduced liquids production. This paper will describe the development and testing of a novel wireline-deployed positive-displacement pump (WLPDP) that was invented to address these challenges.Īrtificial-lift (AL) pumps have historically been developed with high-producing oil wells in mind. Summary What do you do after plunger lifting? What if lift gas is not readily available or your liquid level is around a bend? What can you do with a well that has low reservoir pressure, liquid-loading trouble, and fragile economics? Do you give up on the remaining reserves and advance to plugging and abandonment? These questions were considered, and the answers were found to be unsatisfactory. Completion Installation and Operations (10).
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