Investigation on the Depth of Slip Hanger Teeth Bite into Casing and the Mechanical Properties of Casing under Different Suspension Loads in Ultra-Deep Wells

There is great difficulty in controlling the setting load of large-size slip casing hanger Northwest Oilfield China, and a reasonable significance. This paper studied relationship between bite depth suspension ? 273 mm WE-type China through experiment, theoretical computation, finite element analysis. The accuracy model was proved by comparing simulation results with experimental marks on surface. study show that mark insert deeper lower part sitting position. When hanging increases from 1000 kN to 6000 kN, maximum slips gradually load. residual collapse strength decreases correspondingly. certain value, force corresponding can be obtained. Based research equations, stress distribution wall where deepest obtained derivation. suggestions improving material structure under this were proposed. limit wellhead for avoiding obtained, which significance guiding field-casing setting.