Force analysis and tightening optimization of gas sealing drill pipe joints

Yong, Zhuang; Gao, Lianxin; Pengbin, Yuan

doi:10.1016/j.engfailanal.2015.08.032

Cited by 13 publications

(9 citation statements)

References 6 publications

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“…On the other hand, the body of more slender drill pipes has a reduced thickness and smaller outer diameters. The tool joint connection has also been studied in terms of thread load distribution, local stresses at the thread root and fatigue prediction [13,14,15]. Several optimization techniques aimed at the connection have been evaluated, for example by proposing specific geometry modifications to the connection elements [16].…”

Section: Introductionmentioning

confidence: 99%

Fatigue resonant tests on S140 and S150 grade corroded drill pipe connections and pipe bodies

Santus

Burchianti²,

Inoue

et al. 2020

International Journal of Pressure Vessels and Piping

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Section: Introductionmentioning

confidence: 99%

Fatigue resonant tests on S140 and S150 grade corroded drill pipe connections and pipe bodies

Santus

Burchianti²,

Inoue

et al. 2020

International Journal of Pressure Vessels and Piping

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“…C. Santus et al [11,12] found that the critical stress between the male and female couplings of the oil casing mainly depends on the preload of the shaft pair, and the calculation process takes into account the initial make-up torque and alternating bending load. Yuan GJ et al conducted a reliability evaluation of pipeline joint threads and conducted experimental research on the stress field of threads during the threading process [13,14]. Feng Chen et al [15,16] established a three-dimensional finite element model of casing threads based on the principle of virtual work, nonlinear contact theory, and elastic-plastic yield criterion.…”

Section: Introductionmentioning

confidence: 99%

Research on the Mechanical Properties and Structural Optimization of Pipe String Joint under Deep Well Fracturing Operation

Ma,

Duan,

Huang

et al. 2024

Processes

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In order to reduce the failure accidents caused by the insufficient strength of fracturing string joints, theoretical calculation and string design methods were adopted to conduct finite element calculations on commonly used long circular threads. The distribution laws of stress and contact pressure of long round threads were obtained, a non-standard special thread was designed, and a finite element model of the joint of the casing was established. Considering different make-up torques, tensile loads, and tensile torque loads within a certain range, the stress variation law of the special casing threaded joint under this design size was analyzed. Finally, the stress and contact pressure variation law on the threaded tooth was analyzed under different structures, working conditions, and wall thickness parameters. The thread strength and sealing function were compared under various parameters. The results showed that the smaller the wall thickness of the joints, the greater the contact pressure at the threaded tooth. Among them, the contact pressure of the external threaded tooth is too high, and is prone to the sticking phenomenon. The distribution of contact pressure in the middle section is relatively reasonable. Compared with the original structure, the new structure significantly reduces the contact pressure at the head and tail ends of the threaded connection, reducing the risk of sticking.

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“…Through experiment and simulation, an increase in fatigue strength with an increase in the make-up torque was revealed [1, [27][28][29]. The optimal make-up torque can increase fatigue life of tool joints [30] and sucker rod couplings [18].…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Increasing the fatigue strength of threaded joints of oil and gas equipment by plastic deformation of the thread under high load before make-up

Kopei

Onysko

Panchuk

et al. 2023

J. Phys.: Conf. Ser.

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Uneven distribution of stresses in the thread can cause fatigue failure of the joint, usually in the area of the first roots of the thread. This problem is very relevant for shouldered threaded joints of oil and gas equipment, which operate under conditions of significant cyclic loads. One of the ways to equalize the stresses in the thread is plastic deformation of the thread with a high load before make-up. The influence of various methods of such pre-deformation of the tool joint of drill pipes and the connection of sucker rods on the fatigue life in the thread roots of the pin and box has been studied. A method for optimizing the load for pre-deformation was proposed and it was found that the optimal load can increase the fatigue life by 5 times. The study was carried out by finite element analysis of the axisymmetric model in Abaqus/CAE and calculation of the fatigue life from the Brown-Miller dependence using fe-safe.

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Force analysis and tightening optimization of gas sealing drill pipe joints

Cited by 13 publications

References 6 publications

Fatigue resonant tests on S140 and S150 grade corroded drill pipe connections and pipe bodies

Fatigue resonant tests on S140 and S150 grade corroded drill pipe connections and pipe bodies

Research on the Mechanical Properties and Structural Optimization of Pipe String Joint under Deep Well Fracturing Operation

Increasing the fatigue strength of threaded joints of oil and gas equipment by plastic deformation of the thread under high load before make-up

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