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Category Archives: Engineering
Shear pin analysis using FEA
It is interesting to see how does wellhead tooling mechanism works on installing & retrieving wellhead (and associated components) in the field embodied in simple mechanical design that we might find in our daily life. Shear pin is one of … Continue reading
Posted in Engineering
Tagged angle shear, direct shear, FEA, half angle shear, wellhead, wellhead tooling
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Pressure VS Concentrated Force comparison (with Continuum Distributing Coupling) in Finite Element Analysis
Pressure [PSI] is one of mechanical loading that normally applied on Static stress/displacement analysis. One of the benefits by applying pressure is simplicity for applying uniform distributed load in the normal direction of the surface. However, many mechanical static analysis … Continue reading
Is there any gap in face-to-face 6BX flange / 16BX hub connection?
One time, I was monitoring how the wellhead technician make-up flange connection to compress a (brand new) ring gasket. The make-up process started with stud being torque up to recommended value in criss-cross manner to mate 2 (two) flanges end … Continue reading
Posted in Engineering
Tagged 16BX, 6BX, API, contact pressure, contact stress, end connection, face to face, FEM, finite element method, Flange, flange connection, hub, make-up, Ring gasket, sealing, wellhead
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Know Galling Further on Stainless Steel Fastener
Stainless steel fasteners are a common mechanical joint that used in many industries. Typically, stainless steel is selected due to corrosion resistance feature, instead of mechanical properties required. Apart from these commercial reasons for selecting stainless steel, there is another … Continue reading
Posted in Engineering
Tagged 300 series, 50HBW, abrasive, aluminum coat, astm g40, austenitic, bolt, button-on-block, cold welding, cold work, corrosion resistance, cutting, dissimilar, face center cubic, fastener, fcc, female thread, galling, galling resistant, groove, high work hardening, improper thread joint, male thread, martensitic, material selection, mechanical joint, nitriding, Nitronic® 60, non-abrasive wear, nut, precipitation harden, rolling, s17400, s21800, s28200, s30400, s316000, s41000, s42000, self-mating material, sliding, smooth surface finish, stainless steel, surface roughness, TGS, thread, thread machining, threshold galling stress, wear, wear debris, work harden, xylan
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History of API Casing Grade
some short history to answer what’s behind API letter casing grade Continue reading
Posted in Engineering
Tagged 100k, 105k, 110ksi, 13Cr, 1927, 1930, 1934, 1938, 1940, 1956, 1960, 1968, 1984, 1985, 1987, 1989, 1992, 2011, 22HRC, 25.4HRC, 30ksi, 35ksi, 45ksi, 55ksi, 5CT, 75k, 90ksi, 95k, 9Cr, 9th Edition, API Spec 5A, API Specification 5CT, API Tentative Standard 5AC, API user member, B, C, C110, C75, C90, C95, casing, deeper well, drill pipe, Electric Resistant Welding, embrittlement, ERW, F25, grade, Grade A, Grade D, H40, hardness controlled, high carbon steel pipe, History, IADC, J55, K55, L80, M65, mild sour service, MR0175, MR0175-98, N80, NACE, normalized and tempering, OCTG, oil industry, P105, P110, phonetic clarity, Q125, quench and temper, R95, restricted yield strength, seamless, SPE, sulphide, T95, tensile, tubing, upstream, yield strength
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Reinhold-Spiri Equation
Nowadays, oil and gas operator continually deepen the casing setting depth to reach the well target. These trends have created various operational and well design challenges. One of the challenges lies in the limited capacity of suspended drilling and landing … Continue reading
How to Determine O-Ring Static Friction by using Nomograph
O-Ring is a torus shape mechanical element primarily used for sealing purpose. It is widely used at fluid power system where pressure isolation needed between shaft & cylinder mechanism, both for static sealing (no relative motion between parts & O-Ring) … Continue reading
Casing / Tubing Premium Thread (Part 2)
Regardless various type of premium thread (post 1), there are several aspects that worth to know on premium thread, such as taper profile, coating selection, joint strength, torque value, and connection application level (CAL) performance. Taper profile is a kind … Continue reading
Posted in Engineering
Tagged 13679, anodic, CAL, connection application level, copper, corrosion protection, FEA, finite element analysis, galling resistance, galvanic chart, HPHT, ISO 13679, less noble, make-up, medium weight, medium weight conversion coating, premium thread, Taper, thread compound, torque-turn, torque-turn graph, VME, Von Mises Equivalent, xylan, zinc-phosphate
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