Large-Scale Drill Cuttings Thermal Treatment and Slop System Retrofitted to Drillships During Zero-Discharge Drilling Operations Offshore Angola

An important aspect of hydrocarbon drilling is the usage of drilling fluids, which remove drill cuttings and stabilize the wellbore to provide better filtration. To stabilize these properties, several additives are used in drilling fluids that provide satisfactory rheological and filtration properties. However, commonly used additives are environmentally hazardous; when drilling fluids are disposed after drilling operations, they are discarded with the drill cuttings and additives into water sources and causes unwanted pollution. Therefore, these additives should be substituted with additives that are environmental friendly and provide superior performance. In this regard, biodegradable additives are required for future research. This review investigates the role of various bio-wastes as potential additives to be used in water-based drilling fluids. Furthermore, utilization of these waste-derived nanomaterials is summarized for rheology and lubricity tests. Finally, sufficient rheological and filtration examinations were carried out on water-based drilling fluids to evaluate the effect of wastes as additives on the performance of drilling fluids.

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Thermal treatment of W large-scale fiberform nanostructures

Physica Scripta ◽

10.1088/1402-4896/ac0866 ◽

2021 ◽

Author(s):

Shin Kajita ◽

Tatsuki Okuyama ◽

Hirohiko Tanaka ◽

Tatsuya Kuwabara ◽

Noriyasu Ohno ◽

...

Keyword(s):

Thermal Treatment ◽

Large Scale

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Healthy Caspian Experience helps Boost Drilling Performance in Turkey's Onshore UGS Project

10.2118/207011-ms ◽

2021 ◽

Author(s):

Elchin Akbarli ◽

Rufat Mammadbayli

Keyword(s):

Large Scale ◽

Total Duration ◽

Gas Storage ◽

Lessons Learned ◽

Drilling Performance ◽

Execution Phase ◽

Short Period ◽

Continuous Application ◽

Drilling Operations ◽

Salt Caverns

Abstract The company is executing an underground gas storage project at an unprecedented scale. The intent of this paper is to demonstrate the execution methodology and technologies that the company employed to achieve within set deadlines and deliver the work on time and under the given budget. This paper, therefore will focus on outlining all planning, design as well as drilling & completions strategies utilized by the operating company during the execution phase. During Phase 2 of the project, the Drilling Contractor was engaged to deliver a total of 40 wells within a short period of time. These wells were planned to expand the total gas storage capacity at the Tuz Golu facility to ca. 5 bcm of natural gas stored in underground salt caverns. Tuz Golu wells are vertical with three (3) casing string wells. These land wells are big bore and commence from the installation of the 30″ conductor at a depth of 120m using a small 150-ton conductor rig. Pre-installation of conductors significantly helped accelerate the project delivery schedule. Main drilling operations commenced in January 2020. Since the structure wasn't fully explored in spite of 2D seismic work and the first phase operations, a number of wells drilled encountered no salt leading to their abandonment. As a result, the total duration of the project was consequently extended. Re-Engineering and lessons learned during execution helped deliver a successful learning curve in both drilling and completion operations. The strategy of the company to drill a well in stages of top hole, main drilling and the completion using multiple rig operations was successful, bringing an overall well time from 55 at the beginning of the project to 20 days per well. Thorough planning and design of the wells allowed the company to deliver the projects with well integrity, full suitable for gas storage operations. As a result, the project was executed on time and well within the planned budget thus delivering an excellent value to the stakeholders and main client. The Drilling Contractor has been proactive to employ this staged approach from the very beginning of the project. Irrespective of the delays the Drilling Contractor continued operations with the intermittent rig count of 4 to 8 rigs. A large scale operation demanded careful planning and continuous application of lessons learnt from the first phase which were successfully embedded and implemented.

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In-Fiber Structured Particles and Filament Arrays from the Perspective of Fluid Instabilities

Advanced Fiber Materials ◽

10.1007/s42765-019-00024-9 ◽

2020 ◽

Vol 2 (1) ◽

pp. 1-12 ◽

Cited By ~ 3

Author(s):

Bingrui Xu ◽

Shuqi Ma ◽

Yuanzhuo Xiang ◽

Jing Zhang ◽

Meifang Zhu ◽

...

Keyword(s):

Thermal Treatment ◽

Large Scale ◽

The Other ◽

Materials Selection ◽

Capillary Instability ◽

Fluid Instabilities ◽

Fiber Devices ◽

Filamentation Instability ◽

Future Work ◽

Thermal Drawing

AbstractIn-fiber structured particles and filament array have been recently emerging, providing unique advantages of feasible fabrication, diverse structures and sophisticated functionalities. This review will focus on the progress of this topic mainly from the perspective of fluid instabilities. By suppressing the capillary instability, the uniform layered structures down to nanometers are attained with the suitable materials selection. On the other hand, by utilizing capillary instability via post-drawing thermal treatment, the unprecedent structured particles can be designed with multimaterials for multifunctional fiber devices. Moreover, an interesting filamentation instability of a stretching viscous sheet has been identified during thermal drawing, resulting in an array of filaments. This review may inspire more future work to produce versatile devices for fiber electronics, either at a single fiber level or in large-scale fabrics and textiles, simply by manipulating and controlling fluid instabilities.

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Thermal treatment of carbon-fibre-reinforced polymers (Part 2: Energy recovery and feedstock recycling)

Waste Management & Research ◽

10.1177/0734242x211038192 ◽

2021 ◽

pp. 0734242X2110381

Author(s):

Jan Stockschläder ◽

Peter Quicker ◽

Werner Baumann ◽

Manuela Wexler ◽

Dieter Stapf ◽

...

Keyword(s):

Thermal Treatment ◽

Carbon Fibre ◽

Large Scale ◽

Waste Treatment ◽

Bottom Ash ◽

Calcium Carbide ◽

World Health ◽

Cement Kiln ◽

Process Conditions ◽

Conversion Rates

The use of carbon fibre (CF)-reinforced plastics has grown significantly in recent years, and new areas of application have been and are being developed. As a result, the amount of non-recyclable waste containing CF is also rising. There are currently no treatment methods for this type of waste. Within this project different approaches for the treatment of waste containing CF were investigated. Main subject of the research project were large-scale investigations on treatment possibilities and limits of waste containing CF in high temperature processes, with focus on the investigation of process-specific residues and possible fibre emission. The results showed that the two conventional thermal waste treatment concepts with grate and rotary kiln firing systems are not suitable for a complete oxidation of CFs due to the insufficient process conditions (temperature and dwell time). The CFs were mainly discharged via the bottom ash/slag. Due to the partial decomposition during thermal treatment, World Health Organization (WHO) fibres occurred in low concentrations. The tests run in the cement kiln plant have shown the necessity of comminution for waste containing CF. With respect to the short testing times and moderate quantities of inserted CF, a final evaluation of the suitability of this disposal path was not possible. The use of specially processed waste containing CF (carbon-fibre-reinforced plastic (CFRP) pellets) as a carbon substitute in calcium carbide production led to high carbon conversion rates. In the unburned furnace dust, which is marketed as a by-product of the process, CFs in relevant quantities could be detected.

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Study on the Viability of Using Drill Cuttings from the Potiguar Basin in the Production of Ceramic Products: Influence of Concentration and Firing Temperature

Materials Science Forum ◽

10.4028/www.scientific.net/msf.798-799.224 ◽

2014 ◽

Vol 798-799 ◽

pp. 224-228 ◽

Cited By ~ 1

Author(s):

Leonardo Coutinho Medeiros ◽

Ana P.C. Câmara ◽

Daniel A. Macedo ◽

D.M.A. Melo ◽

Marcus A.F. Melo

Keyword(s):

Large Scale ◽

Raw Materials ◽

Linear Shrinkage ◽

Drill Cuttings ◽

X Ray ◽

Treatment Techniques ◽

Electron Microscopy Analysis ◽

Ceramic Blocks ◽

Clay Matrix ◽

Materials Used

Drill cuttings are wastes produced on a large scale during the drilling of oil wells. Although there are several treatment techniques, there is still no consensus on which one are the best for the economy and environmental. On the other hand, one of the alternatives for the reuse of this waste, and purpose of the present study, is the incorporation of drill cuttings in clay matrixes. The raw materials used in this work, a mixture of clays and drill cuttings, were investigated by two basic techniques of characterization. X-ray fluorescence and X-ray diffraction. In order to evaluate the effect of the content of drill cuttings on the technological properties of sintered ceramics, different formulations containing from 0 wt.% to 100 wt.% of drill cuttings in a clay matrix were obtained. Ceramic samples were obtained by firing at temperatures ranging from 850 °C to 1050 °C. The fired specimens were characterized by water absorption, firing linear shrinkage, resistance to bending three points and scanning electron microscopy analysis. The results indicated that the incorporation of drill cuttings is a viable alternative for the manufacture of several ceramics products, such as solid masonry bricks and ceramic blocks, at certain concentrations and firing temperatures.

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