A hydraulic pliers with torque controller
A technology of torque control and hydraulic tongs, applied in the field of hydraulic tongs, to achieve the effect of less damage, improved service life and operational safety
Active Publication Date: 2018-07-31
吴立中
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Problems solved by technology
There is no technology for torque monitoring in hydraulic pliers in the prior art
Method used
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[0039] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0040] Such as figure 1 and 2 As shown, the hydraulic tongs with torque controller of the present invention include a back-up tong assembly 1, a main tong assembly 2 and a torque control device 7, the middle parts of the back-up tong assembly 1 and the main tong assembly 2 are provided with slip seats, and the slips 3 are circumferentially fixed on the slip seat at intervals. During operation, the back-up tong assembly 1 tightly holds the coupling of the pipe string, and the main tong assembly 2 tightly holds the pipe string to be connected and rotates, thereby screwing the...
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The invention relates to a pair of hydraulic tongs with a torque control instrument. The hydraulic tongs comprise a back tong assembly, a main tong assembly and the torque control device. The middle of the back tong assembly and the middle of the main tong assembly are each provided with a slip bowl. The torque control device is used for controlling the torque applied to a pipe column. The back tong assembly comprises a back tong shell and a clamping assembly arranged inside the back tong shell. The main tong assembly comprises a main tong shell, an idle gear assembly, an annular gear, an upper clamping plate and a lower supporting plate, wherein the annular gear is clamped between the upper clamping plate and the lower supporting plate, the upper clamping plate and the lower supporting plate are connected through a pin shaft, and a shell inside assembly and an input assembly are in transmission connection through the idle gear assembly. By the adoption of the hydraulic tongs with the torque control instrument, damage caused to the surface of the pipe column is small during operation; and meanwhile, the torque applied to the surface of the pipe column can be monitored in real time, the service life of an oil pipe can be greatly prolonged, and the operation safety of the oil pipe can be greatly improved.
Description
technical field [0001] The invention relates to a hydraulic tong with a torque controller, which is suitable for the technical field of petroleum engineering. Background technique [0002] The hydraulic power tong is an open type power tong, which is a mechanized device used for loading and unloading sucker rods, oil pipes, casings, heat insulation pipes, drill pipes and similar string threads during oilfield workover operations. Existing power tongs are mainly composed of main tongs and back-up tongs. The back-up tongs clamp the coupling of the pipe string, and the main tongs clamp the pipe string to rotate to complete the work of taking over and unloading the pipe. The tooth blocks equipped on the tooth blocks inside the jaws of the existing power tongs have relatively hard hardness and sharp teeth points, so that the tooth blocks can be cut into the pipe string when coupling to prevent the tubing from falling into the well. After each operation, an indentation of a certa...
Claims
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IPC IPC(8): E21B19/16
CPCE21B19/161E21B19/165E21B19/166
Inventor 吴立中陆野王小红张建萍
Owner 吴立中