Petroleum drilling well depth measuring system and method

Abstract

The invention discloses a petroleum drilling well depth measuring system and method. The system comprises a winch sensor, a pressure sensor, a hanging load sensor, a laser range finder, a field controller and a monitoring operation terminal. According to the method, the laser range finder is fixed on a large hook during system initial assembly debugging, the large hook is controlled by a winch to move vertically, the onsite controller records the displacement value of the laser range finder and the ring number of the winch in real time to form the corresponding relation between the value of each ring and the displacement value, and the height value of the large hook is read automatically according to the ring number value program of the winch during normal during normal well drilling. In the drilling process, a hydraulic power tong pressure sensor transmits signals to indicate unfastening or fastening and the corresponding hanging load value change, a controller judges whether a drill pipe enters or leaves through the program, and the height change values of the large hook is accumulated to obtain the well depth and the drill bit position value. The system and method overcomes the shortcoming that the traditional measuring mode is in accurate in measurement or complex in measurement work and inconvenient to operate, and is capable of accurately measuring the well depth and the drill bit position and capable of displaying the well depth data in real time without manual operation.

Description

technical field [0001] The invention relates to a petroleum drilling well depth measurement system and method. Background technique [0002] In the previous oil drilling process, the well depth measurement is usually calculated by combining the number of coils of the winch sensor and the suspended weight. The essence is to multiply the coil value of the winch by the diameter of the coil of the drawworks steel rope to obtain the coiled-out or coiled-in length. Then the descending or ascending distance of the drill pipe is obtained, which is calculated in conjunction with the change of the hook suspension weight, and the value of the tripping movement of the drill bit is obtained, and then the position of the drill bit and the value of the well depth are obtained. In order to accurately obtain the formation parameters in well logging, it is necessary to ensure the accurate correspondence between the measurement parameters and the formation depth value. Therefore, the method of...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method that overcomes the shortcomings of traditional measurement methods such as inaccurate measurement or cumbersome measurement work, and inconvenie

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