Liquid level online monitoring method and plunger for monitoring

• Main Authors: WANG MIN, YANG YU, LIU SUYAN, ZANG WANCHEN, QI ZHENGANG, MAO QIN, XIAO GUANJUN, ZHANG CHAO
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The liquid level on-line monitoring method comprises the steps that the plunger is placed in a sealed oil pipe, and a measuring unit is arranged in the plunger; the measuring unit sends detected data to the controller; the controller analyzes the running state of the plunger based on the data; the measuring unit comprises a temperature sensor, a pressure sensor and an acceleration sensor; when it is detected that the variable quantity of the acceleration exceeds +/-0.6 g within 0.5 s, the plunger reaches a wellhead; when it is detected that the pressure rises by at least 3 Mpa within 10 seconds, the plunger is in a downward running state; when it is detected that the temperature stops rising and the plunger acceleration effective value Xrms is larger than 50% of the plunger static effective value XrmsB, the plunger is in a shaft bottom static state; and when it is detected that the acceleration data meets # imgabs0 #, the plunger is in an ascending state. The acceleration change of plunger movement can be sen