Temperature-controlled hydraulic system for top drive drilling rig

Abstract

The invention discloses a temperature control hydraulic system for a top drive drilling rig. The temperature control hydraulic system for the top drive drilling rig comprises a hydraulic pump station, a temperature control valve set, a main valve and a cooler; the main valve is provided with a heating overflow valve and a first liquid-control opening check valve; the hydraulic pump station comprises a hydraulic oil tank, an unloading valve, an oil temperature sensor and an electric heater; the cooler is communicated with the hydraulic oil tank; the temperature control valve set comprises an electromagnetic reversing valve, a first speed adjusting valve, a second speed adjusting valve, a first throttling valve, a second throttling valve and a second liquid-control opening check valve; when the electromagnetic reversing valve is located at the middle position, oil of the hydraulic oil tank returns to the hydraulic oil tank through the unloading valve and the cooler; a first oil outlet of the electromagnetic reversing valve is communicated with the first speed adjusting valve and the cooler in sequence; and a second oil outlet of the electromagnetic reversing valve is connected with three oil ways. The system can adapt to the high temperature and low temperature environment requirements, performs self-adaptive heating or cooling on the oil tank and the main valve, and effectively reduces the manufacturing cost on the basis of guaranteeing reliability.

Description

technical field [0001] The invention relates to the technical field of geological drilling engineering hydraulic systems, in particular to a temperature-controlled hydraulic system for top drive drilling rigs. Background technique [0002] At present, most of the deep well drilling rigs, offshore and shallow sea oil drilling platforms, and construction special craft wells at home and abroad are equipped with top drive drilling devices. The top drive drilling device is also called top drive for short. The top drive drilling device can directly rotate the drill pipe from the upper space of the derrick, and send it down along the special guide rail to complete various drilling operations such as drill pipe rotation drilling, drilling fluid circulation, column connection, make-up and breakout, and back reaming. Top drive drilling rigs significantly increase the capability and efficiency of drilling operations and have become a standard product in the oil drilling industry. Due...

AI Technical Summary

Problems solved by technology

At present, the technical means of temperature-controlled hydraulic systems for top drive drilling rigs mainly have the following disadvantages: the heating form and control are single, and electric control heating is usually installed, the reliability is not high, and it is difficult to adapt to the requirements of high and low temperature environments; the electronic components of oilfield equipment require Explosion-proof, so the cost of general temperature control system is higher

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