These authors are conducting research aimed to develop a non-invasive test method and construct a diagnostic system capable of identifying the condition of mud pumps on deepwater drillships. Ph = Pi x η m. η m is usually of the order of 0. Valve and full open seat offers many advantages for today's higher pressures and faster drilling. The assessment of the operational suitability of mud pumps on deep water drillships depends on maintenance strategy. DM style Mud Gate Valve repair kits and parts. First of all, when a valve is replaced, it is imperative that the valve seat should be replaced, too (and vice versa). Disclaimer/Publisher's Note: The statements, opinions and data contained in all publications are solely. The ideal solution would be to find diagnostic measures (descriptors) that would allow us to predict well in advance the technical condition of the vital elements of mud pumps. The pump on which this study focused is a three-piston single-acting pump, referred to as the triplex pump. Pertamina PDSI Drilling Rig # 42. No warranty for wearing parts Warranty. Their most common defect is erosion-cavitation wear. As the piston moved back it instead of the intake valve off its seat and drew mud in. 5000psi application.
The problem however is to identify which valve is damaged or which of them starts to malfunction. Most of the studies refers to pumps installed in land-based drilling rigs [1, 2, 3]. Pumps are powered by a pump motor.
Warmly welcome you to come to China and visit us! As the fit of the valve seats must be very tight this means that the valves have to be driven into position with a copper bar and removed with a special (hydraulic) pulling tool. Holroyd, T. Machine & Systems Condition Monitoring Series; Acoustic Emission & Ultrasonics, Coxmoor Publishing Company's: Oxford, UK, 2000. In this case, it is necessary to stop the pump and replace the valves.
The acoustic emission signal makes it possible to use non-linear methods of signal analysis in diagnostic inference. Maintenance on the gear end of your pump is important, too. Energies2019, 12, 640. Hu, D. ; Sun, Y. ; Fu, J. ; Li, J. ; Zhang, E. Mud Pump System Fault Tree Analysis.
Temperature of pumped liquid. In a classical case, in terms of physics, acoustic emission is a phenomenon of spontaneous generation of elastic waves by regrouping the internal structure of solids (seldom liquids) and physical systems. Other important functions include securing the well. Cross-arms give greater strength and positive sealing. Research on drilling mud pump fault diagnosis based on fusion of acoustic emission and vibration technology. Company Information. A chart is printed on the manufacturer's nameplate from which it is possible to see which size of the shear pin is needed for the required pressure limitation. B. analyzed the data; A. supervision; A. methodology. A special feature of the Bentec MUD PUMP is the side-mounted gear drive. The power end module is responsible for changing the rotary motion of the crankshaft into the reciprocating motion of the pistons. With good maintenance, a mud pump will last a lifetime, or more!
As the temperature of the pumped liquid rises, physical properties of elastomers decrease. The authors propose to use the propagation of acoustic emission elastic waves, or more specifically, the generation of certain characteristic frequencies associated with a particular kind of machine fault. UPET OILFIELD EQUIPMENTS CO., LTD is one of the most well-known suppliers for the oilfield equipments in China, was established in 2000, and now has grown up to a star company which is not big but very strong in this field with our persistant effort step by step in the past products refer to the whole areas of oilfields, from a very small spare part to a very big complete rig system. On AE Testing, Prague, Czech, 29–31 May 1996; Robert Gordon University: Aberdeen, UK, 2016; pp. An AE acquisition system (made at the Maritime University of Szczecin) and an AE sensor with operating frequency range of 20–300 kHz are used. Although rigs usually have two mud pumps and sometimes three or four, normally they use only one at a time. When you plug the bit, or your brother-in-law closes the discharge valve on a running pump, something has to give. Conventional Cementing Plug (aluminium Core). The improvement to the original design is based on minor dimensional changes on the valve insert groove to accommodate a better fit between the valve and the valve insert.
Custom dies and inserts. Impurities are disintegrated by the metal part of the valve creating sharp fragments that tend to settle in elastomeric inserts, initiating the formation of microfractures. Wherein the above equations. This method has been verified by experiments conducted on a NOV (National Oilwell Varco) -made triplex 14-P-220 mud pump (mounted in the drillship). This should be done whilst pumping over the well at a reasonable rate to ensure the pump is delivering against pressure (a good time to do this is when circulating prior to running casing and cementing). Many traditional systems monitoring the work of devices installed on ships are based mainly on the control of vibration processes. Zeszyty Naukowe Akademii Morskiej w Gdyni2014, 83, 203–210. Case studies have shown up to four times longer life than traditional pony rod seals, lowering operating costs and preventing expensive failures. This is a recipe for disaster. Experienced users attempt to assess the condition of these valve "by the ear".
Frequency components of the signal obtained from the decomposition of the series x(t) are calculated by using the reverse discreet wavelet transformation of series Dj, k and wavelet transformation coefficients Sj, k, and are written as follows: where N = 2p (N—number of data, p—number of frequency components); j = −p, −p + 1, …, −1 index of scale; k = 0, 1, …, 2j N − 1 index of displacement. Chrome sleeve alloy. Here is a schematic of a triplex pump. Available capacities: • 1 600 hp – Rear-Mounted Motor (AC & DC). Brandt Type 4″ Desilter. Similar phenomena occur in the case of components of the mud pump valve unit. The best dampening effect is achieved when the dampeners are installed close to the pump's suction and discharge, as shown in Figure 23. Common abrasive materials are sands, quartz, iron filings, and chemical additives added to the drilling fluid. Batko, W. ; Dąbrowski, Z. ; Kiciński, J. Zjawiska Nieliniowe w Diagnostyce Wibroakustycznej; Biblioteka Problemów Eksploatacji: Radom, UK, 2008.
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