BACKGROUND Spiral metacarpal fractures can result in shortening of the metacarpal shaft, which may lead to extension lag at the metacarpophalangeal joint and reduced grip strength. These fractures have been surgically treated to restore metacarpal length; however, there are complications associated with surgery, postoperative management and wound healing, which further threaten power recovery i...

Horizontal wells’ multi-section and multi-cluster hydraulic fracturing plays an important role in the efficient development of shale gas. However, influence perforating hole natural fracture dip angle on process initiation propagation has been ignored current researches. This paper presents results related to a tri-axial large-scale experiment under different parameters. We discuss experimental...

Outcrop studies have revealed the presence of abundant cemented fractures in many low permeable formations. Recovered cores have also revealed the opening of some of these smaller size fractures on the wall surface of main hydraulic fractures. Furthermore, earlyproduction well-testing analysis in some of these cases provide estimates for hydraulically induced fracture surface areas which are mu...

Background: The purpose of this retrospective study was to analyze the long-term results of revision ORIF, jointcontracture release, and autogenous bone-grafting in the treatment of distal humerus frac-ture nonunions in older agedpatients with poor bone quality or bone loss who would have been candidates for total elbow arthroplasty.Methods: Seven patients (average age at inde...

background:   iran places sixth amongst high risk natural disaster countries and guilan province of iran shoulders a large amount of socio-economic burden due to snow catastrophes. the more knowledge of circumstances we have, the more efficient our future encounters will be. methods: in this retrospective study, of all of the patients admitted to poursina hospital due to snow and ice related tr...

A radial well has a unique wellbore configuration. Fracture propagation in deflagration fracturing is studied rarely. The mechanism of interaction between fractures, natural and micro-fractures still unknown. Based on continuum mechanics, damage variational principles, numerical model fracture established with the Hamilton principle phase-field theory. effects horizontal principal stress differ...

Existing fractured gas reservoir development techniques are mainly based on dual medium numerical-simulation models, which can, to a certain extent, effectively simulate natural fractures with high fracture density; however, these models have some limitations, particularly in terms of simulating the morphology and distribution. Considering carbonate reservoirs complex fractures, this paper, we ...

To investigate complex fracturing and the influencing factors of simultaneous fracture propagation in horizontal wells, a three-cluster model that is controlled by surface displacement parameters established. When performing multistage on reservoirs with relatively high development degree natural fractures, staged multicluster wells one commonly used technical methods for volume fracturing. Two...