Effect of Drilling Cuttings Transport on Pressure Drop in a Flowing Well

Fadairo, Adesina; Adekomaya, Olufemi A.; Falode, Olugbenga

doi:10.2118/125707-ms

Cited by 10 publications

(12 citation statements)

References 9 publications

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“…A drilling fluid is typically pumped through the drill string and is subsequently introduced to the bottom of the bore hole as it squirts out from the drill bit nozzles [1]. This action cools and lubricates the drill bit and helps to convey rock debris/drill cuttings from the drilling area to the surface [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effects of Nanofluid on the Lubricity of Oil-based Mud

Fadairo

Ogunkunle

Victoria

et al. 2018

CJAST

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Nanofluids are applied where heat transfer, drag reduction, binding ability for sand consolidation and corrosion control is of utmost priority. This paper discusses the experimental work carried out on a pre-conditioned base fluid (ethylene glycol and ethanol) with silicon-oxide powder as a nanofluid to investigate the nanofluid effect on lubricity enhancement in the oil based mud. The lubricity test was carried out using Ofite EP lubricity tester which simulates the speed of rotation of drill pipe and the pressure with which the pipe bears against the borehole wall. The result shows that nanofluids prepared using ethanol and ethylene glycol exhibited different rheological behaviors. But ethylene glycol treated with nanoparticles and oil based mud treated with nanofluid shows improved lubricity coefficients that falls within the obtainable lubricity coefficient observed in oil-based mud. Increase in weight percent of the nanoparticles in ethylene glycol resulted into decrease in the lubricity coefficient for the oil-based mud. It has been found that the weight percent of the nanoparticles and the type of continuous phase (ethylene glycol or ethanol) have an important effect on the lubricity of the oil-based mud. From the results, it can be concluded

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Effects of Nanofluid on the Lubricity of Oil-based Mud

Fadairo

Ogunkunle

Victoria

et al. 2018

CJAST

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“…When a well is drilled underbalanced, hydrocarbon production begins as soon as productive zone is penetrated [1,2]. It is possible to produce portion of the reservoir fluid while drilling or cleaning the hole.…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to produce portion of the reservoir fluid while drilling or cleaning the hole. With suitable processing equipments, some underbalanced wells may pay for their cost entirely from production before drilling operations were completed [1,2]. The technique requires the simultaneous flow of fine drilling cuttings and formation fluid (gas, oil and water).…”

Section: Introductionmentioning

confidence: 99%

“…Studies [1][2][3][4][5] on simultaneous flow of fine drilling cuttings and formation fluid influx (gas, oil and water) in vertical pipe has sought to develop a technique with which the pressure drop can be accurately calculated. A lot of research has been conducted to model the flow of fluids in pipes and its corresponding pressure drop [6][7][8] but little information has been reported on the effect of cuttings transport on pressure drop and cutting hold up along the vertical pipe.…”

Section: Introductionmentioning

confidence: 99%

“…A lot of research has been conducted to model the flow of fluids in pipes and its corresponding pressure drop [6][7][8] but little information has been reported on the effect of cuttings transport on pressure drop and cutting hold up along the vertical pipe. Fadairo [2] and Nguyen [5] presented the application of multiphase flow modelling to underbalanced drilling which was considered a key tool for the underbalanced drilling engineer to identify the bottom-hole pressure [1,5]. Guo [4] presented three analytical models that are coded in a spreadsheet program to simulate solid, water, oil, and gas flow in underbalanced drilling and the pressure drop was predicted [1].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improved Model for Predicting Annulus Pressure Drop during Underbalanced Drilling

Samson¹,

Gbadegesin²,

Kelani³

et al. 2015

J Pet Environ Biotechnol

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Most time during underbalanced drilling or cleaning of well, formation fluid (oil and water) influx is usually experienced as soon as productive zone is penetrated because formation pore pressure gradient are higher than hydrostatic pressure gradient. Successful flow of fine drilling cuttings and formation fluid (gas, oil and water) to the surface flow facilities therefore demands for accurate prediction of pressure drop along the well bore during underbalanced drilling. Previous studies on pressure profile prediction in the wellbore during underbalanced drilling have not taken into account the effect of cuttings volume. The purpose of this study is therefore to develop an improved model that predicts the effect of cuttings volume on annulus pressure drop in the wellbore during underbalanced drilling. This is an extension of Guo and Fadairo model for investigating the effect of cutting volume pressure drop during underbalanced drilling. The result of the study shows that the cutting flow rate increases with small pressure differential while it decreases with large pressure differential. This depicts that cutting retards fluid flow and increases bottom-hole pressure and fluid density, resulting in low fluid velocity and cutting lifting capacity of the drilling fluid. This may result in cutting accumulation, ultimately reducing the ability of the drilling fluid to effectively lift drill cuttings from bottom-hole to the surface and eventually lead into stuck drilling string.

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Impact of drilling fluid viscosity, velocity and hole inclination on cuttings transport in horizontal and highly deviated wells

Piroozian

Ismail

Yaacob

et al. 2012

J Petrol Explor Prod Technol

100

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Deviation from vertical path makes drill cuttings to accumulate on the lower side of the wellbore that induces the formation of cuttings bed. Subsequently, relative problems occur while drilling. Excessive torque and drag, difficulties in running casing in hole and accomplishing good cementing jobs and mechanical pipe sticking are few of the classical examples of such problems. Therefore, a comprehensive understanding of influential parameters on hole cleaning seems to be essential. This paper indicates the results of an experimental study that was carried out to evaluate cuttings removal efficiency using three types of drilling fluid. The experimental works were conducted using a 17-feet long opaque flow loop of 2-in. diameter as the test section. For each test, the amount of cuttings transport performance (CTP) was determined from weight measurements. Viscosity was investigated together with other two influential parameters, namely fluid velocity and hole inclination under various flow conditions. It is shown that the increase in drilling fluid viscosity has improved CTP by approximately 8 % at all angles provided the flow regime remained turbulent while velocity was kept constant. However, further increase of viscosity as flow regime was turning into transient or laminar flow, has lessened CTP by a total average of 12 %. It was also revealed that an incremental escalation in hole inclination from 60°to 90°has a positive effect on CTP, i.e., it will be improved up to 40 %. Drilling fluid velocity was found to have significant impact on CTP as it could attain maximum percentage of 98 %.

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Effect of Drilling Cuttings Transport on Pressure Drop in a Flowing Well

Cited by 10 publications

References 9 publications

Evaluation of the Effects of Nanofluid on the Lubricity of Oil-based Mud

Evaluation of the Effects of Nanofluid on the Lubricity of Oil-based Mud

Improved Model for Predicting Annulus Pressure Drop during Underbalanced Drilling

Impact of drilling fluid viscosity, velocity and hole inclination on cuttings transport in horizontal and highly deviated wells

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