Time-dependent rheology of a model waxy crude oil with relevance to gelled pipeline restart (Record no. 170271)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02059nab a2200169 4500 |
| 008 - CÓDIGOS DE INFORMACIÓN DE LONGITUD FIJA - INFORMACIÓN GENERAL | |
| Campo de control de longitud fija | 260224s2009 xxu |
| 100 1# - RESPONSABLE PERSONAL | |
| Apellido, Nombre | Magda, Jules J. |
| 9 (RLIN) | 41752 |
| 245 00 - TITULO | |
| Título | Time-dependent rheology of a model waxy crude oil with relevance to gelled pipeline restart |
| 260 ## - PUBLICACION, DISTRIBUCION, ETC | |
| Fecha de publicación, distribución, etc. | mar./abr. 2009 |
| 270 ## - FECHA DE CARGA | |
| Fecha de carga | 2009-08-07 ; 2009-08-07 |
| 300 ## - DESCRIPCION FISICA | |
| Otra extensión | 4 p. ; 1311-1315 |
| 520 ## - RESUMEN, ETC | |
| Resumen | Resúmen del autor:- When ambient temperatures are low, paraffinic crude oils being transported in pipelines may form gels composed of wax crystals. If pipeline flow ceases, these waxy gels may make it difficult to restart the flow without breaking the pipe. To predict the severity of this problem, we consider the rheology of a transparent model waxy crude oil for which pipeline flow visualization results are presented elsewhere. We investigate characteristics of the model oil determined by cone-plate shear flow measurements, such as the viscosity and wax appearance temperature, the gelation temperature, the elastic modulus, and the yielding behavior of the gel. The yielding behavior is a critical determinant of pipeline restart, and the time-dependent yielding behavior observed for this model oil is similar to that reported previously for North Sea crude oils. In particular, at sufficiently low-stress levels, the gel never yields, whereas the gel yields or "fractures" immediately at sufficiently high-stress levels. At intermediate-stress levels, the gel "creeps" with a delay time to fracture that ranges from seconds to hours, depending upon the imposed stress value. Some authors have suggested that waxy gels slowly degrade as they creep and that this gives rise to the very long delay times to fracture that may be observed. However, a creep-response hysteresis test on the model oil studied here shows that the gel elastic modulus does not vary with time during creep, a result which is inconsistent with the degradation mechanism. |
| 773 0# - CORRECCIÓN | |
| Título | Energy & fuels |
| Partes relacionadas | 23 |
| 942 ## - DESC. DE MATERIAL | |
| Tipo de item KOHA | Artículo de Revista |
| Fuente de clasificación | Dewey Decimal Classification |
| Biblioteca propietaria | Biblioteca actual | Fecha de adquisición | Inventario | Total de préstamos | Inventario | Fecha de carga | Tipo de item KOHA |
|---|---|---|---|---|---|---|---|
| Biblioteca Alejandro Angel Bulgheroni | Biblioteca Alejandro Angel Bulgheroni | 05/03/2026 | 200045098 | 200045098 | 05/03/2026 | Artículo de Revista |
