Nonacid Solution for Mineral Scale Removal in Downhole Conditions

2009 ◽  
Author(s):  
Yamile Sanchez ◽  
Eber Castro Neira ◽  
David Reyes ◽  
Carlos Macias ◽  
Hernan Gutierrez ◽  
...  
Keyword(s):  
Scale Removal ◽  
Mineral Scale

Evaluation of Anti-fouling Surfaces for Prevention of Mineral Scaling in Sub-surface Safety Valves

2014 ◽  
Author(s):  
T. V. Charpentier ◽  
A.. Neville ◽  
S.. Baraka-Lokmane ◽  
C.. Hurtevent ◽  
J-R.. Ordonez-Varela ◽  
...  
Keyword(s):  
Barium Carbonate ◽  
Scale Removal ◽  
Associated Production ◽  
Safety Risks ◽  
Strontium Sulfate ◽  
Mineral Scaling ◽  
Mineral Scale ◽  
Static Conditions ◽  
Work Done ◽  
Production Losses

Abstract Mineral scale formation and deposition in down-hole completion equipment such as subsurface safety valves can cause dramatic and unacceptable safety risks and associated production losses and operational costs. Current scale removal strategies involve both mechanical and chemical technologies, each of them having their own advantages depending on the type of mineral scale and its location. However, these techniques are often costly and of limited efficiency. The current study assesses the ability of a range of chemically and morphologically modified coatings to prevent/reduce mineral scale surface fouling. Building-up on previous work done under static conditions, this paper presents results from scaling tests under laminar and turbulent dynamic conditions using a rotating cylinder electrode under in a complex (mixed) scaling environment (supersaturated w.r.t. calcium carbonate, barium sulfate, strontium sulfate, barium carbonate and strontium carbonate). The study shows that if properly selected, surface treatments represent a promising approach to reduce scale deposition on downhole equipment surfaces that are critical to maintain equipment functionality and thereby well safety barrier integrity. By analyzing the scaling behaviors observed within the set of surfaces tested, suggestions of the controlling factors in anti-fouling on these systems are presented and discussed.

TECHNOLOGIES FOR MINERAL SCALE REMOVAL FORM WELL EQIPMENT WITH HYDROCHLORIC ACID

2019 ◽  
pp. 65-71
Author(s):  
A.V. Brikov ◽  
◽  
A.B. Andreev ◽  
E.G. Kulaev ◽  
A.N. Markin ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Scale Removal ◽  
Mineral Scale

Oxidation Companied by Scale Removal: Initial and Asymptotical Kinetics

2008 ◽  
Vol 45 (7) ◽  
pp. 662-667 ◽  
Author(s):  
Yitung CHEN ◽  
Taide TAN ◽  
Huajun CHEN
Keyword(s):  
Scale Removal

scholarly journals A scale removal and scale absorption method for circulating water system

2021 ◽  
Vol 676 (1) ◽  
pp. 012099
Author(s):  
Yao Yang ◽  
Xiaona Li ◽  
Xiang Li ◽  
Yuchao Li ◽  
Tianqi Meng ◽  
...  
Keyword(s):  
Water System ◽  
Absorption Method ◽  
Scale Removal ◽  
Circulating Water ◽  
Circulating Water System

scholarly journals Enzyme-catalyzed biodegradation of penicillin fermentation residues by β-lactamase OtLac from Ochrobactrum tritici

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Peng Wang ◽  
Chen Shen ◽  
Qinqin Cong ◽  
Kaili Xu ◽  
Jialin Lu
Keyword(s):  
Large Scale ◽  
In Vitro Study ◽  
Scale Removal ◽  
E Coli ◽  
Penicillin V ◽  
Highly Active ◽  
Steady State Kinetics ◽  
Biodegradation Process ◽  
Km Value

Abstract Background Biodegradation of antibiotics is a promising method for the large-scale removal of antibiotic residues in the environment. However, the enzyme that is involved in the biodegradation process is the key information to be revealed. Results In this study, the beta-lactamase from Ochrobactrumtritici that mediates the biodegradation of penicillin V was identified and characterized. When searching the proteins of Ochrobactrumtritici, the β-lactamase (OtLac) was identified. OtLac consists of 347 amino acids, and predicted isoelectric point is 7.0. It is a class C β-lactamase according to BLAST analysis. The coding gene of OtLac was amplified from the genomic DNA of Ochrobactrumtritici. The OtLac was overexpressed in E. coli BL21 (DE3) and purified with Ni2+ column affinity chromatography. The biodegradation ability of penicillin V by OtLac was identified in an in vitro study and analyzed by HPLC. The optimal temperature for OtLac is 32 ℃ and the optimal pH is 7.0. Steady-state kinetics showed that OtLac was highly active against penicillin V with a Km value of 17.86 μM and a kcat value of 25.28 s−1 respectively. Conclusions OtLac demonstrated biodegradation activity towards penicillin V potassium, indicating that OtLac is expected to degrade penicillin V in the future.

Comprehensive management of mineral scale deposition in carbonate oil fields – A case study

2014 ◽  
Vol 92 (11) ◽  
pp. 2264-2272 ◽  
Author(s):  
M. Zahedzadeh ◽  
M.S. Karambeigi ◽  
E. Roayaei ◽  
M.A. Emadi ◽  
M. Radmehr ◽  
...  
Keyword(s):  
Oil Fields ◽  
Comprehensive Management ◽  
Mineral Scale ◽  
Scale Deposition

scholarly journals Mineral-scale mobility of PGE and TABS in subducted serpentinites

2021 ◽  
Author(s):  
Fernando Gervilla ◽  
Jose Maria González-Jiménez ◽  
Rubén Piña ◽  
James Saunders ◽  
Gaelle Plissart ◽  
...  
Keyword(s):  
Mineral Scale

Laboratory-Scale Investigation of the Utilisation of Multiple Flat-Fan Nozzles in Descaling Petroleum Production Tubing

2021 ◽  
Author(s):  
Kabir Hasan Yar'Adua ◽  
Idoko Job John ◽  
Abubakar Jibril Abbas ◽  
Salihu M. Suleiman ◽  
Abdullahi A. Ahmadu ◽  
...  
Keyword(s):  
High Pressure ◽  
Oil And Gas ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Scale Removal ◽  
Petroleum Production ◽  
Well Completion ◽  
Water Jets ◽  
Well Integrity ◽  
Injection Pressures

Abstract Despite the recent wide embrace of mechanical descaling approaches for cleaning scales in petroleum production tubings and similar conduits with the use of high-pressure (HP) water jets, the process is still associated with downhole backpressure and well integrity challenges. While the introduction of sterling beads to replace sand particles in the water recorded high successes in maintaining well completion integrity after scale removal in some recent applications of this technique, it is, unfortunately, still not without questions of environmental degradation. Furthermore, the single nozzle, solids-free, aerated jetting descaling technique – recently published widely – is categorized with low scale surface area of contact, low descaling efficiency and subsequent high descaling rig time. The modifications to mechanical descaling techniques proposed in this work involve the use of three high-pressure flat fan nozzles of varying nozzles arrangements, standoff distances and injection pressures to remove soft scale deposits in oil and gas production tubings and similar circular conduits. This experiment provides further insights into the removal of paraffin scales of various shapes at different descaling conditions of injection pressures, stand-off distances and nozzle arrangements with the use of freshwater. The results obtained from this study also show consistency with findings from earlier works on the same subject.

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