Wiertnictwo, Nafta, Gaz
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ISSN 1997-2011
e-ISSN: 2300-7044
Issue Date
2005
Volume
T. 22
Number
Nr 1
Description
Journal Volume
Wiertnictwo, Nafta, Gaz
T. 22 (2005)
Projects
Pages
Articles
Problemy doboru manifoldu hydraulicznego w stacji sterowania głowicami przeciwerupcyjnymi
(2005) Artymiuk, Jan; Bednarz, Stanisław
Working parameters of a BOP control station decide about the reliability of systems operation and safety of drilling. The operation system of the station was subjected to high pressures exerted by an external pump control system, co-operating with the valve system, supply cables, pressure accumulators, and hydraulic manifold. Owing to the function performed by BOP, the operating system should provide a reliable operation of working BOP systems. The most important parameters of the manifold are the working volume of hydraulic fluid and control pressure. Values of these parameters condition the quantity and size of accumulator tanks as well as the magnitude of the hydraulic manifold. The distribution of stresses in the manifold under the pressure enables a proper selection of construction elements of the hydraulic manifold.
Sterowanie wierceniem przy użyciu systemu Soft Torque
(2005) Artymiuk, Jan; Sokalski, Marek
The system reads top drive torque. The soft torque system adjusts the rotational speed according to torque variations measured, achieving dampening of torsional oscillations on the bit and equipment. The system reacts on torque rate of change and adjusts the speed. Increasing torque reduces the speed proportional to the torque rate of change. A controller adjusts the speed according to torque variations measured. Increasing torque indicates sticking of pipe or bit. Decreasing torque increases the speed likewise. The system easily adapts to existing top drive systems, AC, DC or hydraulic.
Operacje wyciągania-zapuszczania przewodu wiertniczego a bezpieczeństwo przeciwerupcyjne
(2005) Bednarz, Stanisław
Safety of drilling requires careful control of pressure in the boreholes in the course of drilling operations, tripping of the single casing, exchange of tool replacement as well as tripping/drawing of the string. Regardless the type of well's outlet, the tripping/drawing operations frequently are hindered by fracturing of the walls of the hole, lost circulations, cavings, unexpected flux of formation fluid etc. In a number of cases these effects are due to gross hydrodynamic changes of pressure caused by the movement of the string in the fluid filling up the borehole. When in motion, the string moves with a varying rate. These operations also depend on whether or not they are conducted in an open borehole. Another serious cause of such problems is the lack of well trained crew who would understand the processes taking place in the borehole. Frequently the procedures applied in the first symptoms of eruption are appropriate in the process of drilling, but they are not fit for the tripping/drawing operations. This may lead to an open eruption. Another factor vital for maintaining the readiness to adequately respond to the hazard is the precision of measurements of drilling mud in the trip tank.
Badania korozyjności cieczy nadpakerowych na bazie chlorku sodu w warunkach dopływu siarkowodoru
(2005) Bielewicz, Danuta; Wysocka, Marta; Wysocki, Sławomir
The authors present the results of experiments oriented to determining the corrosiveness of over-packer $Na-Cl$-based fluids, saturated with hydrogen sulfide, in the area of the BMB field, as well as the selection of the most efficient corrosion inhibitor. The experiments concentrated on the measurement of $H_{2}S$, pH and corrosiveness of over-packer fluids saturated with hydrogen sulfide at temperature 60 and 80 Celsius degrees. The experiments were conducted for two types of solutions: $NaCl$ and $NaCl+CMC LV$, with the initial pH mpos 10 and 12. Analogous experiments were performed for the above fluids after adding three corrosion inhibitors. The analysis of the results showed that the lowest corrosiveness in the hydrogen sulfide conditions at a temperature of 80 Celsius degrees was obtained for the $NaCl$-based fluid with CMC LV and admixture of the corrosion inhibitor ANTYKOR PP with the initial pH = 12.
Badanie wpływu miejsca pobrania i sortymentu prób węgla na oceny jego metanonośności
(2005) Broda, Piotr; Kwarciński, Jan; Twardowski, Kazimierz
This paper is based on the analysis of long-term desorption tests with the use of the USBM - a method applied to document coalbed methane in Poland since the mid 1990s. Tests were performed on coal samples representing five grain classes and samples were taken from six different sites in the technological process of coal mining, processing and post-exploitation processing on the surface. The tests were carried out with the use of variance analysis method with a single (one factor) classification on the example of the Hard Coal Mine „Budryk”.