Well repair self-balancing derrick

Abstract

The invention provides a well repair self-balancing derrick. The derrick is vertically installed on a base or a vehicle-mounted chassis, an overhead travelling crane is arranged at the upper end of the derrick and consists of an overhead travelling crane support, a front pulley block and a rear pulley block, the front pulley block and the rear pulley block are located at two ends of the overhead travelling crane support, the front pulley block and a rider hook are located on one side, and the rear pulley block, a steel wire rope, a fixed pulley block and a fixed rope end are located on one side. The self-balancing derrick has no upsetting moment and can complete well repair operation under the guy-rope-free condition, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of workover equipment, in particular to a workover self-balancing derrick. Background technique [0002] During the production process, oil, gas, and water wells often have some failures, resulting in reduced production or even shutdown of the well. In order to maintain the normal production of the well, it must be repaired. Well workover refers to the operation and implementation measures to remove the fault in order to restore the normal production of the well or improve the production capacity of the well, also known as downhole operation. The purpose and task of workover is to ensure the normal operation of the well, complete various downhole operations, improve the utilization rate and production efficiency of the well, and maximize the production of the well. [0003] Major oil fields in China have entered the middle and late stages of development. The failure rate of oil, gas and water wells is increasing, an...

AI Technical Summary

Problems solved by technology

[0003] Major oil fields in China have entered the middle and late stages of development. The failure rate of oil, gas and water wells is increasing, and the workload of minor repair operations is increasing. A fast and efficient workover equipment is needed. Currently, the derricks of the workover equipment in use in The inclination angle is generally 3°~5°, and the number of wire ropes at the front and back of the derrick is different. Therefore, the derrick inevitably bears the forward overturning moment during operation. Therefore, it is necessary to pre-dig the ground anchor pit before the operation, and pre-bury the ground. Anchors, outside guylines, need more vehicle cooperation

At the same time, with the continuous urbanization of the oil region, some oil and water wells are adjacent to the living area, and the land for the well site is continuously reduced, which also leads to more and more restrictions on the operation of conventional workover rigs

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