Impacts of polypropylene glycol (PPG) additive and pH on tribological properties of water-based drilling mud for steel-steel contact

Xiao, Huaping; Liu, Shuhai; Chen, Yu; Han, Dong Keun; Wang, Deguo

doi:10.1016/j.triboint.2017.02.025

Cited by 32 publications

(9 citation statements)

References 16 publications

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“…Many challenges face the drilling engineers such as developing a drilling mud that yields good well stability with minimum fluid loss. Therefore, different additives, mainly polymers and surfactants, are utilized with bentonite suspensions to modify the rheological behavior of the suspensions to meet the specification of the desired application, such as poly vinyl pyrolidone [ 24 ], poly vinyl alcohol [ 25 , 26 ], xanthan [ 27 ], polyanionic cellulose [ 28 ], polyethyleneimine [ 29 ], poly (ethylene glycol) [ 30 ], polypropylene glycol [ 31 ] and carboxymethyl cellulose sodium salt [ 32 , 33 ], polyacrylamide [ 34 ], polyethyleneimine [ 35 ], cetyltrimethyl ammonium bromide (CTAB) and sodium dodecyl sulphate (SDS) [ 36 , 37 ]. In addition, the reduction of bentonite concentration in the drilling mud is another objective of the drilling engineers to avoid the undesirable effects of high solid concentrations that lead to a reduction in the rate at which a wellbore can be drilled to a given depth.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Biopolymer Chitosan on the Rheology and Stability of Na-Bentonite Drilling Mud

Abu-Jdayil¹,

Ghannam²,

Ahmed³

et al. 2021

Polymers

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The utilization of greens resources is a grand challenge for this century. A lot of efforts are paid to substitute toxic ingredients of the conventional drilling mud system with nontoxic natural materials. In this paper, the effect of the natural polymer chitosan on the rheology and stability of sodium-bentonite drilling mud was investigated in the polymer concentration range of 0.1–3.0 wt.%. Both the shear and time dependent rheological properties of pure chitosan, pure bentonite and bentonite–chitosan dispersions were studied. Moreover, zeta potential measurements were used to evaluate the stability of bentonite-chitosan suspension. Adding chitosan improved the natural properties of drilling mud, namely: yield stress, shear thinning, and thixotropy. The viscosity of bentonite suspension increased significantly upon the addition of chitosan in the concentration range of 0.5 to 3.0 wt.% forming network structure, which can be attributed to the interactions of hydrogen bonding between -OH clusters on the bentonite surface with the NH group in the chitosan structure. On the other hand, dispersed chitosan–bentonite suspension was observed at low chitosan concentration (less than 0.5 wt.%). Increasing both bentonite and chitosan concentrations led to the flocculation of the bentonite suspension, forming a continuous gel structure that was characterized by noteworthy yield stress. The desired drilling mud rheological behavior can be obtained with less bentonite by adding chitosan polymer and the undesirable effects of high solid clay concentration can be avoided.

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Section: Introductionmentioning

confidence: 99%

The Effect of Biopolymer Chitosan on the Rheology and Stability of Na-Bentonite Drilling Mud

Abu-Jdayil¹,

Ghannam²,

Ahmed³

et al. 2021

Polymers

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“…The other important application of polyol compounds in drilling fluids is related to their ability to adsorb on metal surface. These chemical compounds have the ability to reduce the coefficient of friction on the metal-metal and metal-rock contact (Akram et al, 2016;Aziz et al, 2016;Luyster et al, 2016;Jasiński, 2017;Sayindla et al, 2017;Xiao et al, 2017;Zhao et al, 2017;Zhu et al, 2017;Kania et al, 2018). Propylene oxide polymers have the ability to reduce the coefficient of friction, the most effective was polypropylene glycol with the lowest molecular mass of 200 u.…”

Section: Theoretical Discussionmentioning

confidence: 99%

New shale hydration inhibitors adapted to the downhole conditions

Zima

Badawczy²

2019

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The subject of the paper is the application of polyol compounds as active shale formation hydration inhibitors in drilling muds as the result of permanent interest from the industry in the use of this type drilling mud systems. Due to opportunity of precise compounds selection ensuring optimum properties of the drilling mud under specific down hole conditions, new agents have been developed that work effectively in a wider temperature range experienced in borehole conditions. The paper describes laboratory research carried over polyols that haven't been used in drilling fluids technology yet but may ensure optimal inhibition properties in the wide temperature range. Compounds belongs to polyglycols category like ethylene oxide or copolymers of ethylene oxide and propylene oxide with different molecular weight, are widely use so far. However, in the presented discussion other agents were used, which are products of ethoxylation and propoxylation of long-chain hydrocarbon fatty alcohols (10 and more carbon atoms). The main test that can prove drilling mud inhibitory properties is active shale dispersion investigation, routinely carried in ambient conditions. As part of the additional tests carried out, the influence of the inhibitors used on the active shale dispersion under elevated temperature conditions was determined in order to confirm the inhibitory properties of these agents in near-down hole conditions. Near down hole conditions test was also carried out on drilling muds containing polyols group compounds, ie resistance test to contamination with ions of divalent metals (Ca 2+ and Mg 2+), solid phase contamination (milled Miocene shale pretending drill cuttings) and increased temperature. Investigations were also carried out on clouding of polyol solutions in 7% KCl solution. The acquired results indicate that chemical compound presence of the hydrophobic chain derived from fatty alcohol in the molecule further increases the effectiveness of the rock hydration inhibitor. The results obtained during the study allowed for a better understanding of the inhibition mechanism of these agents on the active shale. The new rock hydration inhibitor developed as part of the work can be used in industrial conditions.

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“…The formed tribofilm isolates and lubricates two mated surfaces resulting in an effective lubricating performance (Knothe and Steidley, 2005). Previous researchers have reported that additives may aggregate with bentonites which largely exist in drilling mud (Xiao et al, 2017). Consequently, there are less free additives available which can play the role of lubricants.…”

Section: Effect Of Microcapsule Additives On Tribological Properties Of Drilling Mudmentioning

confidence: 99%

Tribological behaviors of water-based drilling mud with oleic acid-filled microcapsules as lubricant additives for steel-steel contact

Liu

Xiao

2020

ILT

Self Cite

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Purpose The purpose of this paper is to study the tribology behavior of steel–steel contact under the lubrication of water-based drilling mud with different oleic acid-filled microcapsules as lubricant additives. Design/methodology/approach A ball-on-disc tribometer was used to evaluate the lubrication properties of the steel–steel contact. The wear tracks of the worn surfaces were observed by a scanning electron microscope. Findings Results show that the dependence of both friction and wear on the category of additives shares a consistent pattern. In contrast to oleic acid and empty microcapsules, oleic acid-filled microcapsules achieve the best tribological performance which is related to the lubricant effect of oleic acid and the isolation and rolling abilities of microcapsules. Practical implications This study provides a helpful method of encapsulated lubricant additives to prolong lubrication performance for steel–steel contact. Originality/value This study has applied microcapsules to improve the tribological properties of drilling mud. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2019-0320/

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Impacts of polypropylene glycol (PPG) additive and pH on tribological properties of water-based drilling mud for steel-steel contact

Cited by 32 publications

References 16 publications

The Effect of Biopolymer Chitosan on the Rheology and Stability of Na-Bentonite Drilling Mud

The Effect of Biopolymer Chitosan on the Rheology and Stability of Na-Bentonite Drilling Mud

New shale hydration inhibitors adapted to the downhole conditions

Tribological behaviors of water-based drilling mud with oleic acid-filled microcapsules as lubricant additives for steel-steel contact

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