Drilling depth capacities of semi-submersible platform are between 6000 and 11430 meters. Deep-water vessels can drill at a depth between 5000 and 11887 meters under water.
The present situation and developing tendency of hydraulic rotary drill and raise boring machine,the differences in rock crushing mechanism and the extracting methed of drilling,the relation between drilling depth and twisting moment,and the identities in property and working principle are introduced.
The way to improve rigs drilling ability with middle and deep depth(ZJ30,ZJ40)are introduced in the paper; At presents half of the rigs in china are rigs with middle or deep depth.
The drilling fluid technology has been successfully used in a directional well with total measurement depth (TMD) of 3625m, hole deviation of 49°, horizontal displacement of 1229m, and 3224.5m open hole, in which 2292m is in the inclined section.
After analyzing new and old standards of rigs and detailed parameters,it is proved that improvement on rig drilling ability with middle or deep depth is feasible;
The present work deals with the identification and study of the morphological, biochemical, and physiological properties of one such strain, Che 82, isolated from sample C-29 of 3.4-3.5 Maold sedimentary rocks taken at a drilling depth of 146.74 m.
Furthermore, a method for estimating these parameters by determining the changing eigenfrequencies over the drilling depth from spectrogram data using the maximum likelihood method is proposed.
In this work, effects of drilling parameters (drilling depth, feed rate, and spindle speed) on the twist drill bit temperature and thrust force in the dry drilling of Al 7075-T651 material were experimentally investigated.
The objective was to establish a model using multiple regression analysis between spindle speed, drilling depth, feed rate, and drilling method with the drill bit temperature and thrust force in a Al 7075-T651 alloy material.
This paper theoretically analyzes the hydraulic system of the well-drilling machine and concIudes that the suction head of the muddy pump is used up by the drawdwn of the suction surface inside the drilling pipe due to density difference of the drilling mud with cuttings and the muddy water, the geometric installation height of the pump velocity head difference of drilling mud, and the total pipe losses at the suction side of the pump. This conclusion provides a primary theoretical basis for the choosing of...
The author finds out several methods to raise the accuracy of crankshaft balancing machines through study and analysis These methods are:1. Correct selection of the reference plane.2. Improvement of the dissolution of the unbalanced mass.3. Improvement of the simulation of the curve of the mass removal against the drilling depth.With the above measures the dynamic balancing accuracy was raised from 60-80 g.cm. to 30-50 g.cm., an improvement of almost 50％ with increase in production due to reduction in rewor...
In this paper, the essential conditions and the economic profit of the wells Zhong-47 and Zhong-48 are described in broad outline, the necessity to develop directional drilling and cluster drilling for fractured gas reservoir in Sichuan is presented and the control method of directional well trace accuracy is emphatically discussed in ten aspects.
钻深
drilling deep
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