A critical review of the coiled tubing friction-reducing technologies in extended-reach wells. Part 1: Lubricants

Livescu, Silviu; Craig, Steven

doi:10.1016/j.petrol.2017.07.072

Cited by 55 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To increase the operating depth of CT in horizontal wells, the main research methods in the world focus on mechanical friction reduction technology, lubricant friction reduction technology and traction robot. Two kinds of friction reduction technology can increase its operating depth, but their effect is limited above 2000 m of horizontal section [6]. The traction robot provides axial tension for CT, thereby avoiding the occurrence of CT buckling, which can effectively increase the depth of CT into the well [7].…”

Section: Introductionmentioning

confidence: 99%

Research status and development trend of traction robot of coiled tubing

Zhao,

Wang,

Chen

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Coiled tubing (CT) is prone to buckling and locking due to axial friction when extending in large displacement directional wells and horizontal wells. The traction robot of CT can provide axial traction, which can fundamentally address the problem of difficult downward entry of CT. The operation principle, size, traction force, traction speed and other technical indicators of the existing more cutting-edge types of traction robots are analyzed, and the critical structural features of traction robots are summarized. The application prospect of drilling bridge plug technology and drilling technology of the traction robot is put forward. The main points of the research on the traction robot are summarized to provide a concise reference for the future development direction.

show abstract

Section: Introductionmentioning

confidence: 99%

Research status and development trend of traction robot of coiled tubing

Zhao,

Wang,

Chen

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Water-based lubricants are in high demand as they present an affordable and environmentally friendly alternative to hydrocarbon-based lubricants . In the oil and gas industry, coil tubing applications, in particular, face low speeds and significant lateral forces that can be overcome by incorporating additives into the lubricating fluid . Metal working, machining, and oil and gas drilling all require mixtures of lubricating fluids to provide friction reduction and cooling effects .…”

Section: Introductionmentioning

confidence: 99%

“…1 In the oil and gas industry, coil tubing applications, in particular, face low speeds and significant lateral forces that can be overcome by incorporating additives into the lubricating fluid. 2 Metal working, machining, and oil and gas drilling all require mixtures of lubricating fluids to provide friction reduction and cooling effects. 1 Pure water performs poorly as a lubricant in boundary and mixed lubrication regimes due to its high corrosive tendency and a relatively low boiling point and viscosity, hence, requires the use of various additives.…”

Section: Introductionmentioning

confidence: 99%

Impact of Ionic Liquid Additives and Inorganic Fullerene-Like Tungsten Disulfide on Friction and Wear under Aqueous Environments

et al. 2022

View full text Add to dashboard Cite

Aqueous lubricants are gaining attention due to significant advantages such as being environmentally friendly, tunable, and thermally stable. The oil and gas industry can use such additives to utilize in water-based fluids for applications where small sliding velocities and large lateral forces require enhanced lubrication. This investigation aims to compare the effects of two different additives: (i) inorganic fullerene-like tungsten disulfide (IF-WS2) and (ii) an alkanolamine ionic liquid denoted as AA-IL. Both additives were paired with three different base fluids, deionized water (DIW), aqueous NaCl, and aqueous CaCl2, to measure the impact on fluids commonly utilized in the field. The addition of IF-WS2 to all three solutions resulted in a 30–60% decrease in the coefficient of friction (COF) and wear. Surface analysis by X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS) showed that the formation of a tribofilm (tungsten oxide layer) is primarily responsible for tribological improvements. The AA-IL did not show evidence of any chemical interaction. Instead, a physically bonded film of the AA-IL on the steel surface enabled the improved COF (40–50% reduction) and wear response. Both additives are effective in very small amounts and provide excellent wear and friction reduction properties.

show abstract

“…The length of the coiled tubing into horizontal wells is quite limited. Livescu and Craig 3 have proposed to use friction force reduction technologies to extend the length of tubing in horizontal wells. However, the length of extension is extremely limited, and it cannot meet the development requirements of horizontal wells.…”

Section: Introductionmentioning

confidence: 99%

Control algorithm of weight on bit and rate of penetration based on drilling robot

Jian

Liang

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

At present, the traction force and traction speed of the drilling robot cannot be controlled. However, if the speed of the drilling robot is too high, the bit will be damaged because of the shock load. If the speed of the drilling robot is too low, the drilling efficiency will be very low. The existing control system and control algorithm of the drilling robot cannot meet the requirements of the drilling conditions. A control system of the weight on bit and the rate of penetration of the drilling robot was invented. On the basis, a dual-loop fuzzy proportional integral derivative (PID) control algorithm of the pressure difference and flow rate was proposed to control the weight on bit and rate of penetration. Furthermore, the simulation model of the dual-loop fuzzy PID control algorithm was established. It is found that the proposed dual-loop fuzzy PID control algorithm has the characteristics of small overshoot and good tracking. Furthermore, the correctness of the theory was verified by the experiments. The experiments show that the average amplitude of rate of penetration vibration by using adaptive PID controller is less than 50% of that of PID controller. The maximum weight on bit with the adaptive PID controller is only 45.94% of that of the conventional PID controller. The overshoot of the adaptive PID controller is only 24.07% of that of the conventional PID controller. At the same time, the vibration amplitude of the conventional PID controller is obviously larger than that of the adaptive PID controller. The proposed adaptive PID controller in this paper can effectively reduce the vibration of the bit. By reducing the vibration of the bit, the life of the bit can be extended. Finally, it is of great significance to realize the efficient and intelligent drilling process.

show abstract

A critical review of the coiled tubing friction-reducing technologies in extended-reach wells. Part 1: Lubricants

Cited by 55 publications

References 10 publications

Research status and development trend of traction robot of coiled tubing

Research status and development trend of traction robot of coiled tubing

Impact of Ionic Liquid Additives and Inorganic Fullerene-Like Tungsten Disulfide on Friction and Wear under Aqueous Environments

Control algorithm of weight on bit and rate of penetration based on drilling robot

Contact Info

Product

Resources

About