High-pressure well-mouth continuous feeding device

Abstract

The invention provides a high-pressure well-mouth continuous feeding device which comprises a plunger pump and a drivepipe feeding head (7), wherein the plunger pump is fixed on a well mouth through a pump fixing barrel (10) and a support, the drivepipe feeding head (7) is installed on a high-pressure well-mouth drivepipe, the plunger pump is communicated with a feeding box (4) through a sucking pipeline (5), and the plunger pump is connected with the drivepipe feeding head (7) through a discharging pipeline (6). A pressing board (1) is further installed on an oil-extraction polish rod (14) of the high-pressure well mouth, the pressing board (1) presses and drives a plunger regulation rod (2) of the plunger pump to reciprocate, and dispersing agents in the feeding box (4) enter the plunger pump through the sucking pipeline (5) under the action of the plunger pump and then are conveyed into the drivepipe feeding head (7) through the discharging pipeline (6). By means of the design of the high-pressure well-mouth continuous feeding device, infusion type continuous and uninterrupted feeding of oil wells with high concentration of colloid and asphaltene is achieved, and the purpose that the oil well colloid and the oil well asphaltene are prevented from blocking wellholes is achieved.

Description

technical field [0001] The invention relates to an oil well dosing device, in particular to a continuous dosing device for a high-pressure wellhead in the process of oil exploitation. Background technique [0002] In oilfield exploitation, oil wells with colloidal asphaltene content as high as 50% are often used. With the extension of oilfield development time, affected by the decrease of oil well pressure, temperature and other parameters, colloidal asphaltenes will continue to precipitate, and in the wellbore Accumulation leads to wellbore blockage and affects the normal production of oil wells. In response to such problems, oil mining companies have screened out dispersive plugging removers for colloidal asphaltene-precipitated plugs; and used periodic dosing to wash wells to prevent colloidal asphaltene from clogging the wellbore. Although periodic dosing and flushing can basically suppress the problem of colloidal asphaltene clogging the wellbore, the method of periodi...

AI Technical Summary

Problems solved by technology

Although periodic dosing and flushing can basically suppress the problem of colloidal asphaltene clogging the wellbore, the method of periodic dosing and flushing still has the following disadvantages: 1. The periodic dosing and flushing operation not only requires the organization of various operating vehicles to increase Operating costs, and the need to shut down the well, seriously affect the production of oil wells; 2. The precipitation rate of colloidal asphaltenes is unpredictable, and it is difficult to accurately grasp the cycle of periodic dosing and washing wells. The well will not solve the problem and will eventually require a workover to deal with the wellbore

Images