By Lecourtier, Jacqueline; Cartalos, Ulysse (Eds.)
Cementing is a tough operation and the standard of the outcome relies on many elements linked to: the country of the open gap part; the apparatus and fabrics hired; the fluids used; the strategies utilized. This record offers an replace of the knowledge and proposals on tools and systems to be utilized on the good website.
desk of Contents
1. Drawing Up the Cementing software
2. types of Cementing
three. environment Cement Plugs to strive against misplaced move
four. explanations of Failure in Casing Cement Jobs and treatments
Read Online or Download Cementing Technology and Procedures PDF
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Extra info for Cementing Technology and Procedures
C) The use of the thread protector is mandatory. (d) Grease should never be applied if the 'pipe is inserted into the table. (e) The elevator or a pipe clamp should be used for the pipe engaged in 2. DIFFERENT TYPES O F CEMENTING 59 the table until the string introduced into the well has sufficient weight to avoid displacement of the slips and to prevent any risk of dropping. (f) Makeup should be started at high speed and low torque, and terminated at low speed and the required torque, (8) The torque should be carefully monitored: it is determined according to the type of thread, the casing diameter and the grease frictional factor: there is no torque indication for Buttress threads: the torque is determined by making up until the triangular mark of the screwed pipe touches the edge of the female part of the pipe engaged in the rotary table.
A meeting could be useful and is always recommended. Water for cementing should be analyzed to check that it has characteristics similar to the water that served for the laboratory tests (chloride, calcium). 58 CEMENTING TECHNOLOGY AND PROCEDURES The mixing water and spacer are prepared in clean tanks, and the amounts of additives carefully checked. Bentonite (non-doped) must be pre-hydrated for at least two hours before use. The additives should be added in the following order: anti-foaming agent, filtrate reducer, shear thinner and retarder.
The company representative must check the gage diameter himself and be present when the pipes are measured. ATTENTION: Sliding the gage with compressed air in the casing is dangerous and therefore prohibited. The thread length must not be included in the total pipe length. For Buttress pipes, the length to be deduced stops at the triangular mark. The measurements of each pipe and of the total string must be checked by several persons. C. Inspection of Cementing Equipment and Stocks CEMENTING UNIT The pressure test of the pumps, valves and cementing lines, up to the drill floor, will be recorded on a graph.