The Special Successful PCP Applications in Heavy Oilfield

Wu, Bingchang; Li, Xin

doi:10.2118/136817-ms

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…325 to 400°F) are above the maximum rating for conventional elastomeric stators (i.e. approximately 248°F) (Wu and Li 2010). PCPs with special high-temperature elastomeric stators may be a possible alternative.…”

Section: Progressing Cavity Pumps (Pcps)mentioning

confidence: 96%

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Assessment of Artificial Lift Methods for a Heavy Oil Field in Kuwait

Worth

Al-Safran

Choudhuri

et al. 2014

Day 1 Mon, December 08, 2014

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This paper describes a systematic assessment artificial lift methods for a heavy oil development in Kuwait. The main recovery strategies that were being considered for the development consisted of different sequencing of primary production, cyclic steam stimulation and steam flooding, with both vertical and horizontal wells.In 2007, Kuwait Oil Company drilled five vertical wells in their heavy oil fields, as a precursor to the full field development planned in the coming years. These five wells represented the first major activity in the formation since the 1980s when two cyclic steam stimulation pilot tests were conducted. The characteristics of the development and of the associated planned recovery strategies presented several AL challenges that needed to be assessed.This work consisted of an assessment of the strengths and weaknesses of various AL systems and a ranking of these systems according to well geometry, oil viscosity, targeted flow rate and the recovery method. The assessment and ranking were mainly based on vendor quoted capabilities, focused wellbore modelling and lessons learned from other heavy oil field cases around the world. While significant experience with rod pumps in cyclic steam stimulation exists in Canada, the lessons learned from that experience needed to be evaluated due to the differences with the Kuwait heavy oil development, such as the requirement to "easily" transition from primary to thermal production and the possible use of metallic stator progressing cavity pumps.This paper provides guidance to other developments around the world in regards to heavy oil AL selection and to how best to apply lessons learned from existing heavy oil developments.

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Section: Progressing Cavity Pumps (Pcps)mentioning

confidence: 96%

“…One reference indicates that the maximum volume of solids is approximately 0.5 to 2% (Wu and Li 2010), while another reference suggests as high as 5% (Beauquin et al 2008). Thus, while solids may result in wear and plugging, how severe these failure mechanisms will be for KOC's scenarios is uncertain.…”

Section: Metal Progressing Cavity Pumps (M-pcps)mentioning

confidence: 99%

Assessment of Artificial Lift Methods for a Heavy Oil Field in Kuwait

Worth

Al-Safran

Choudhuri

et al. 2014

Day 1 Mon, December 08, 2014

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“…Chen et al [4] investigated the correlation of the volumetric efficiency of PCPs with the pressure difference using FEA and fluid-structure interaction methods followed by experimental data, identifying two leakage mechanisms. Other works include presentation of various types of PCPs used in the oil industry [5] as well as examination of common failure modes appearing in such applications such as adhesive failure between the elastomer of the stator and the steel housing [6] and design optimization of PCPs for use in abrasive environments [7]. In the context of this paper however, PCPs used in the construction industry are examined in terms of their main operational issue being clogging during operation.…”

Section: Introductionmentioning

confidence: 99%

Design of a new-concept conical positive displacement slurry pump for continuous de-clogging

et al. 2019

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Slurry pumps are extensively used in the construction industry while positive displacement screw pumps are used in most mobile concrete pump applications. The aggregate size is known to significantly affect pump performance in terms of clogging. Large aggregates tend to be trapped against the stator-rotor interface, blocking the continuous and smooth operation of the screw pump. In order to avoid the development of excessive stress values able to damage the rotor-stator mechanism of the pump, the typical de-clogging mechanism deployed by most positive displacement screw slurry pumps includes reversing the rotation of the pump driving motor thus allowing the aggregates to be carried away with the mixture, so that the pump can soon resume its operation. This procedure causes frequent start-stops of the pump resulting in dis-continuation of the pumped mixture lasting a few seconds, that while being of little importance in most construction applications, can be of significance in applications requiring higher levels of accuracy and continuous mixture flow. In the context of this work, a novel concept of positive displacement screw slurry pump is presented, including a continuous de-clogging mechanism, without the need to reverse the rotation of the driving motor. This de-clogging operation is achieved through the modification of the geometry of both the rotor and stator introducing a conical form along the axial direction. This configuration of the rotor-stator, allows for small displacements along the axial direction, which in turn increases the size of the cavities facilitating the de-clogging of the pump. Variable pitch is also introduced to both the rotor and stator in order to ensure constant mass flow of the mixture throughout the length of the screw pump covering for the velocity increase as a result of the conical geometry. The axial movement of the rotor in relation to the fixed stator, is achieved through the elastic support of the rotor in the axial direction, that allows for small axial displacements, when stresses induced from trapped aggregates exceed the stiffness of the support. The proposed concept comprises a passive real-time declogging mechanism that greatly reduces pump idle time compared to the conventional mechanism described earlier, providing smoother operation and stable mass flow of the mixture.

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“…At present, progressive cavity pump (PCP), which is a kind of artificial lift devices devised by Moineau in the 1930s (Saveth and Klein, 1989;Moineau, 1930), has been widely used in various oil field productions, especially in heavy oil fields, due to its numerous technical advantages such as low power consumption and low initial investment (Liu et al, 2005;Ramos et al, 2007;Wu and Li, 2010). The PCP consists of a single helical rotor rotating eccentrically inside a double threaded helical elastomeric stator of twice the pitch length.…”

Section: Introductionmentioning

confidence: 99%