Oil pipe band joint detecting device

Abstract

The invention discloses an oil pipe band joint detecting device. The oil pipe band joint detecting device comprises a measuring cylinder body provided with a vertical penetrating inner hollow cavity. An upper opening and a lower opening of the vertical penetrating inner hollow cavity are correspondingly formed in the upper end and the lower end of the measuring cylinder body, and a plurality of service ports communicating with the vertical penetrating inner hollow cavity are evenly formed in the cylinder wall of the measuring cylinder body in the circumferential direction; a plurality of detecting parts are evenly arranged in the measuring cylinder body in the circumferential direction, and the detecting parts correspond with the service ports; each detecting part comprises a transverse spring, a sensor and an elastic-arm arch, wherein the transverse spring, the sensor and the elastic-arm arch are sequentially arranged from outside to inside in the radial direction of the measuring cylinder body; and sensor outlet flanges are mounted on the service ports, the outer ends of the transverse springs are fixed to the sensor outlet flanges, the inner ends of the transverse springs are fixed to the sensors, and the inner ends of the sensors are fixed to the elastic-arm arches. In this way, the oil pipe band joint detecting device achieves detection of the band joint pulling operation under pressure effectively, is safe and reliable, and is high in environmental adaptability, automatic in detecting, and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to an oil pipe hoop detection device. Background technique [0002] Traditional drilling and workover techniques often require well killing or blowout and depressurization operations. Killing wells will cause production layer pollution or even blockage, reducing oil well production. Snubbing workover machines can better meet this requirement. In order to prevent blowout, the annular blowout preventer is a key component for isolating the high temperature and high pressure in the well during the snubbing operation. During the process of lifting or lowering the pipe string, the rubber core of the annular blowout preventer is in a closed state. When a pipe collar passes through, in order to avoid damage to the rubber core, the rubber core of the annular blowout preventer should be opened. When one of the rings The rubber core of the blowout preventer is opened, and the rubber ...

AI Technical Summary

Problems solved by technology

At present, we use the contact type cam switch mechanism to detect the arrival of the joint collar in the workover pressure operation, or use the non-contact differential transformer detection technology and the excitation coil excitation method to pass through the magnetic field when the joint collar passes It is feasible in principle to detect the arrival of the hoop by sudden change, but there are many problems in the process of use: 1. The shaking of the tubing during the lifting and lowering process deviates from the center, which directly leads to the inaccuracy of the detection; 2. The oil stains and mud on the pipe wall will seriously affect the detection of the hoop when the pipe is lifted; 3. The sludge on the oil pipe with ferromagnetic debris will also affect the accuracy of the detection of the hoop

The emergence of the above three problems has made the detection of hoop joints in the wellhead operation under pressure a "world" level problem, which has brought great problems to the automation of wellhead operations.

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