A review on casing while drilling technology for oil and gas production with well control model and economical analysis

Patel, Dipal B.; Thakar, Vivek; Pandian, Sivakumar; Shah, Manan; Sircar, Anirbid

doi:10.1016/j.petlm.2018.12.003

Cited by 24 publications

(5 citation statements)

References 18 publications

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“…As a result, it's critical to understand the distinctions between conventional drilling and CwD in terms of well control and its monitoring system, As Blowout will occur if the well control system fails to early detect the kick (formation pressure greater than wellbore pressure) and terminate it quickly and effectively. [19] There are many definitions have been given to describe kick tolerance (KT); however, for practical purposes, kick tolerance can be defined as the largest kick volume that can be tolerated without breaking the prior casing shoe. [20] Regardless of which kick tolerance definition is used by an engineer during well design, a common philosophy is that any design has an imaginary technical boundary around it, and that making changes outside of this design boundary envelope risks related to well integrity and operational safety during well planning.…”

Section: G Rig Power Demandmentioning

confidence: 99%

Analytical Study of Early Kick Detection and Well Control Considerations for Casing while Drilling Technology

Azab¹

2021

Preprint

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Recently, casing while drilling (CwD) technology has been employed to reduce drilling time and expenses. These intelligent drilling technique improved wellbore stability, fracture gradient, and formation damage while reducing exposure time but when a well control issue arises, the differences in wellbore geometries and related volumes compared to regular conventional drilling procedures necessitate a distinct strategy. In this paper, the essential well control parameters were provided for casing while drilling operations, presents simplified method that has been developed to evaluate the maximum kick tolerance (KT) for both conventional and casing while drilling techniques using a mathematical derivation, the narrow annular clearance, in contrast to drilling with a conventional drill string would impair kick detection and handling operations. Furthermore, the large disparity in kick tolerances should be carefully evaluated in order to avoid lost circulation/kick cycles as well as examine and evaluate technical approaches to early kick detection (EKD) studying how they relate to safety, efficiency, and reliability in a variety of common casing while drilling operations. According to preliminary findings, by utilizing casing while drilling technology and compared to identical well was drilled conventionally using drill pipe, the annulus pressure loss (APL) is average 3 times of the conventional drilling technique. Furthermore, kick tolerance is reduced by 50% and maximum allowable well shut-in time reduced by 65% necessitating early kick detection.

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Section: G Rig Power Demandmentioning

confidence: 99%

Analytical Study of Early Kick Detection and Well Control Considerations for Casing while Drilling Technology

Azab¹

2021

Preprint

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“…As known, casing is often considered as the most costeffective solution to ensure the stability and safety of drilling [35]. Normally, the borehole is just cased with steel tubes in unstable soil formations and fractured rocks.…”

Section: Stability Of Grouting Holesmentioning

confidence: 99%

Simultaneous Operations of Pregrouting and Shaft Drilling in Shaft Construction

Feng

et al. 2020

Advances in Civil Engineering

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In shaft construction, conducting shaft drilling and pregrouting simultaneously is expected to speed up the sinking rate and save the cost. Reasonable determination of the spatial locations of the drilled shaft and grouting holes and proper defining of the start time of each construction work are the crucial techniques. To smoothly execute the simultaneous operations, the bedrock to be grouted is divided into two sections. The upper bedrock is injected first using straight grouting holes to act as a tight cover to protect shaft drilling. Then, the lower formations are grouted using S-shaped grouting holes, which are performed simultaneously with shaft drilling. The construction time of simultaneous operations of pregrouting for the lower bedrock using S-shaped holes and shaft drilling is the saved time. The main technical challenges include the stability of grouting holes and safety of shaft walls, as well as the disposal of the contaminative waste drilling mud. The stability of grouting holes which might affect by the shaft drilling-induced ground vibration could be evaluated according to the penetration of ground vibration caused by TBM tunnelling. If the grouting hole is in the range of ground vibration, protective measures including casing and ground improvement should be utilized to ensure the stability of grouting holes. The stability of unlined walls of the drilled shaft caused by the increased groundwater pressure can be achieved by a tight cover between the drilled shaft and pregrouting holes. The thickness of the cover is actually the length of the straight holes. The cover should have sufficient thickness and impermeability, which can considerably reduce or even completely stop the increased groundwater pressure in vicinity of the drilled shaft. The thickness and permeability of the cover could be determined using Maag’s solution for penetration of grouts in porous media. On the other hand, the waste drilling mud with proper modifications can be reutilized to prepare clay-cement-like grouts, which could provide an eco-friendly and cheap solution to harmlessly treat the huge volume of waste drilling mud. The properties of waste drilling mud and behaviors of grouts prepared using the waste mud should be experimentally investigated before reutilization, owing to uncertainties of geology in various cases. The construction time using the simultaneous operation method is just about 60% of that of the traditional excavation method, and the low value of measured residual water inflow shows the reliability of reusing the waste drilling mud as grouting materials. The proposed method could virtually improve the shaft sinking rate and save the construction cost. The principles developed for these technical challenges have been proved to be applicable in practices, which are believed to strongly support the applicability of this new method in other cases.

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“…Drilling is a critical operation in the oil and gas industry. , Drilling fluids are circulated into the wellbore to remove the cuttings and enhance the stability of the wellbore. − The drilling fluids are made by mixing several solids and liquids such as bentonite, barite, water, or hydrocarbon (diesel primarily). − The components of drilling fluids are carefully designed to improve their efficiency and enhance the overall drilling operation . Barite is a common weighting agent that has been used extensively to increase the weight of the drilling mud. , Barite (BaSO 4 ) makes up around 50% of the drilling fluids that are most commonly employed in drilling operations. , It is preferred over other weighting agents due to its high density, which will provide adequate mud weight …”

Section: Introductionmentioning

confidence: 99%

Barite Removal Using Macropa: Simulation and Solubility Investigations

Hassan

Kamounah

Pittelkow³

et al. 2022

Energy Fuels

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We describe an in-depth study of the performance of the macrocyclic descaling agent ‘macropa’ for barite (BaSO4) removal. Macropa outcompetes known chelating agents such as DTPA, HEDTA, and EDTA at moderate pH. The solubility studies showed that macropa has a promising performance in removing the barite minerals at a pH of 8. Around 11.4 g of barite can be dissolved in 1 L of the macropa solution while using EDTA and DTPA solutions can dissolve around 5 and 8 g/L of the barite particles, respectively, all at the same pH of 8. Insight into the mode of action of macropa was sought using a DFT-based computational method, and this reveals that the binding energies are sensitive to the orientation of the OH groups of the acids and acid groups themselves in the 3D structural orientation. The calculated binding energies correlate well with the experimentally observed dissolution behavior. There are several indications that macropa binds K+ as well, and some care has to be taken with designing descaling experiments properly.

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A review on casing while drilling technology for oil and gas production with well control model and economical analysis

Cited by 24 publications

References 18 publications

Analytical Study of Early Kick Detection and Well Control Considerations for Casing while Drilling Technology

Analytical Study of Early Kick Detection and Well Control Considerations for Casing while Drilling Technology

Simultaneous Operations of Pregrouting and Shaft Drilling in Shaft Construction

Barite Removal Using Macropa: Simulation and Solubility Investigations

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