Cause Analysis of Buttress Premium Thread Connection Pullout for a Well

2011 ◽  
Vol 337 ◽  
pp. 627-632
Author(s):  
Zhi Yong Pan ◽  
Sheng Yin Song ◽  
Wen Hong Liu ◽  
Jian Jun Wang ◽  
Xin Hu Wang
Keyword(s):  
Chemical Properties ◽  
Oil Field ◽  
Cause Analysis ◽  
Thread Connection ◽  
Deep Well ◽  
Dimension Measurement ◽  
Pullout Failure ◽  
Full Scale Tests ◽  
Physical And Chemical ◽  
And Chemical Properties

The buttress thread connection was used in deep well or ultra-deep well widely because of its high joint efficiency. Pullout failure scarcely happen on buttress premium thread connection with great joint strength and good sealing property. Direct evidences about connection dropout couldn’t get in most cases by reason of casing string had fallen into well or casing string had been concreted in formation by cement. Now the difficulty of analysis on pullout is higher and higher. A buttress premium thread casing joint had pulled out at mill end of coupling in a straight well and dropout casing string couldn’t get out of the well. Research on this pullout case was carried out combining relative theories with tests. Macroscopic analysis and dimension measurement were done for dropout coupling. The material’s physical and chemical properties were checked. Thread inspection and full-scale tests were done for two casing simples that are same lot with pullout. Metallograph analysis was carried out on load flank and guide flank in box thread of pullout coupling and same lot new coupling. The results showed that dropout failure was ascribe to inadequate make-up torque at mill end of pullout coupling and complex downhole condition and improper handling in the oil field. On the other hand joint’s strength decline on the effect of unsuitable heat treatment to coupling and greatly uneven black crested pin thread around circumference. The pertinence measures were laid down at the end of this passage.

Cause Analysis of Round Thread Connection Dropout

2012 ◽  
Vol 479-481 ◽  
pp. 2028-2032
Author(s):  
Zhi Yong Pan ◽  
Sheng Yin Song ◽  
Wen Hong Liu ◽  
Xin Li Han ◽  
Jun Han ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Cause Analysis ◽  
Safety Hazard ◽  
Thread Connection ◽  
The Past ◽  
Dimension Measurement ◽  
Full Scale Tests ◽  
Physical And Chemical ◽  
Great Economy ◽  
And Chemical Properties

Dropout may be happen to round thread connection by main reasons of design and process of product, material’s property, make-up torque or make-up position, field operation problems etc.. Casing’s property has get a high improvement with the development over the past decade in China. But the number of connection dropout accident didn’t declined obviously. These lead to great economy loss and safety hazard had taken place. Research on a round thread connection pullout case was carried out combining relative theorys with tests. Macroscopic analysis and dimension measurement and material’s physical and chemical properties were checked for casings and couplings. Thread inspection and full-scale tests were done for casing simples that are same lot with dropout. Comprehensive analysis was carried out on these results. The results showed that dropout failure was ascribe to two main causes. One is make-up location cann’t reach standard location at field end, and the other is incorrect holding position on coupling in the course of making up.

Two Typical Cases Analysis of Casing Connection Pullout

2012 ◽  
Vol 524-527 ◽  
pp. 1651-1655
Author(s):  
Zhi Yong Pan ◽  
Chun Feng ◽  
Hua Jia Zhang ◽  
Dong Feng Li ◽  
Peng Yang
Keyword(s):  
Chemical Properties ◽  
Comprehensive Analysis ◽  
Full Scale ◽  
Physical And Chemical Properties ◽  
Dimension Measurement ◽  
Full Scale Tests ◽  
Physical And Chemical ◽  
Macroscopic Analysis ◽  
And Chemical Properties

Research on a round thread casing connection pullout case and a buttress thread casing connection pullout accident was carried out combining relative theorys with tests. Macroscopic analysis and dimension measurement and material’s physical and chemical properties were checked for casings and couplings. Thread inspection and full-scale tests were done for casing simples that are same lot with pullout casing. Comprehensive analysis was carried out on these results. Two cases history showed that casing connection dropout may take place if make-up location cann’t reach standard location or make-up torque is too little even if the quality of casing and coupling are in accordance with corresponding standards.

Approbation of the Technology for Utilization of Drilling Waste in the Framework of Pilot Tests

2021 ◽  
Vol 25 (1) ◽  
pp. 14-20
Author(s):  
E.V. Gaevaya ◽  
S.S. Tarasova
Keyword(s):  
Saline Soil ◽  
Chemical Properties ◽  
Oil Field ◽  
Oil Fields ◽  
Physical And Chemical Properties ◽  
Drilling Waste ◽  
Alkaline Reaction ◽  
Physical And Chemical ◽  
Pilot Tests ◽  
And Chemical Properties

The technology of utilization of drilling waste in the framework of pilot tests at an oil field is considered. The technology is based on a physicochemical method of disposal of drilling waste by introducing natural environmentally friendly components aimed at improving the water-physical and chemical properties of drilling waste. The basic technological scheme of utilization of drilling waste by pitless drilling is presented. The man-made soil obtained in the process of utilization of drilling waste is suitable for reclamation of adjacent (adjoining) industrial and auxiliary infrastructure, disturbed lands of temporary and permanent allotment of oil fields. The hydrogen index in the technogenic soil corresponded to the alkaline reaction of the medium and amounted to 8.8 pH. The content of oil products was at the level of 956 mg/kg. In terms of salinity, the technogenic soil was classified as non-saline soil (<0.5%).

FEATURES OF STRUCTURAL-GROUP COMPOSITION OF SATURATED HYDROCARBONS OF NAFTALAN OIL OF AZERBAIJAN

2017 ◽  
Vol 60 (10) ◽  
pp. 22
Author(s):  
Vafa A. Adigozalova ◽  
Lyudmila P. Polyakova
Keyword(s):  
Chemical Composition ◽  
Group Composition ◽  
Chemical Properties ◽  
Oil Field ◽  
Physical And Chemical Properties ◽  
Structural Group ◽  
Saturated Hydrocarbons ◽  
Structural Group Composition ◽  
Physical And Chemical ◽  
And Chemical Properties

Naftalan oil is known to be used in a treatment of various deseases. The unique medicinal effect is caused by the special chemical nature, due to this oil is differ from the industrial one. The actual problem of today is to study physical and chemical properties and chemical composition of Naftalan oil from various expluatation levels for the development of scientific bases of ecological monitoring of medicinal oil, and for the solution of the practical tasks on its standardization. The paper discusses the study on physical and chemical properties and chemical composition of the oils from the various levels of the top part of Naftalan field and the peculiarities of its biological effect.The tasks are as: a determination of physical and chemical properties, component and group hydrocarbon composition of oil in working wells of three exploitation levels (the first, marly, the second – sandy) of the top department of the Maikop suite of Naftalan oil field; a comparative study on structure-group composition of saturated hydrocarbons isolated from different on the properties samples of Naftalan oil to find their “working start”. As a result of the studies the influence of vertical differentiation was shown to effect sufficiently on fraction and component composition of Naftalan oil. The peculiarities of area distribution of a deposit are associated with changes in properties and composition of a fold structure and presence of the bed water-oil contact. A stability of oil of the first and marl levels and changes in properties of oil of the second sandy level effected by the stretching levels of the commercial oil are shown by the comparison of the results of the systematical analysis of the oil from the working wells of the top department of the oil field carrying out for 10 years. A difference in physical and chemical properties of oils was found to be caused by the peculiarities of structure-group composition of saturated components.Forcitation:Adigozalova V.A., Polyakova L.P. Features of structural-group composition of saturated hydrocarbons of Naftalan oil of Azerbaijan. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 10. P. 22-29

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Tailoring microstructures of materials through biomimetics

1993 ◽  
Vol 51 ◽  
pp. 500-501
Author(s):  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Chemical Properties ◽  
Design And Synthesis ◽  
Structure Sensitive ◽  
Macro Scale ◽  
Methods Of Synthesis ◽  
Successive Level ◽  
Engineering Materials ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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