the narrow operating window between pore pressure and fracture pressure makes drilling difficult in some operations. a feasibility study of managed pressure drilling (mpd) is carried out on iran darquain oil field. the previous wells drilled in this field showed that mud returns were lost during drilling gadvan formation. the present work addresses this problem by means of surface back pressure...

conclusions the application of dn produces an improvement in ilf and clf can be prescribed for subjects with mtp in ut muscles. results statistical analysis (paired t-test) revealed significant increase in neck lateral flexion range of motion in contra-lateral side after treatment sessions in control and experimental group compared with pre-treatment score (p < 0.05). however, only dry needling...

background and aim: low back pain is a common complaint in communities which has negative effects on different aspects of life. an effective method for reduction of low back pain complications is foot reflexology. foot reflexology has a positive effect in reduction of complications in low back pain. foot reflexology reduces respiratory rate, blood pressure and pulse rate. this study is an inves...

The narrow operating window between pore pressure and fracture pressure makes drilling difficult in some operations. A feasibility study of managed pressure drilling (MPD) is carried out on Iran Darquain oil field. The previous wells drilled in this field showed that mud returns were lost during drilling Gadvan formation. The present work addresses this problem by means of surface back pressure...

objectives: altered movement strategy and postural control has been observed in low back pain (lbp) patients. objective of this study was to determine postural response following support surface translation, also correlations between postural response related measures and disability caused by lbp. methods: 20 healthy subjects and 20 patients with recurrent non specific lbp participated in this ...

It is generally known that severe plastic deformation processes with back pressure not only apply higher hydrostatic stress and more deformation compared to what a regular process can apply to a workpiece but also prevent surface defects in the workpiece during the process. Hydrostatic cyclic expansion extrusion (HCEE) was developed recently for processing long ultrafine-grained metals and allo...

background: tension and stress are among the factors that lead to hypertension. in most individuals, behavioral strategies, such as relaxation and massage, are effective in controlling the individuals’ response to stress, thus reducing hypertension. methods: this non-blind clinical trial was conducted on 90 patients with primary hypertension. the patients were randomly divided into a control an...

This paper analyzed the characteristics of managed pressure drilling (MPD) technology and impact of wellhead back pressure on the wellbore annulus pressure profile, and found that the application of this technology provides room for improvement to the current casing program design. Meanwhile, the equivalent density of drilling fluid in wellbore annulus needs to consider the impact of back press...