Integrated wellhead continuous dosing device

Abstract

The invention discloses an integrated wellhead continuous dosing device which comprises a power end and an overflowing end in mutual connection with each other, wherein the power end comprises a cylinder and a plunger; the cylinder is vertically arranged; the plunger is inserted into a chamber of the cylinder; an extending end of the plunger is connected with a power source; a compression spring for resetting the plunger is arranged between the chamber and the plunger; the overflowing end comprises a channel which is respectively in annular communication with the chamber, a drug kit and a wellhead. Compared with the prior art, the integrated wellhead continuous dosing device has the advantages of simple structure, stability and reliability in work, high adaptive capacity to environment, accurate dosage and convenience in maintenance and repairing.

Description

technical field [0001] The invention relates to the field of petrochemical equipment, in particular to an integrated wellhead continuous dosing device. Background technique [0002] After drilling to find oil in the oil field, it is necessary to install a recovery machine to extract the crude oil in the well. In the extraction of crude oil, with the extraction of crude oil, a large amount of colloidal asphaltenes will be precipitated in the wellbore, which will block the oil pipe and affect oil recovery. , At this time, it is necessary to carry out well washing operation, and the construction process of well washing operation is cumbersome, the cost is high, and the environment is polluted. The anti-scaling operation is low in cost, safe and reliable. The anti-scaling operation needs to use a dosing device, which is connected with the medicine box and the wellhead annulus respectively, and injects the medicament into the wellhead annulus through a plunger pump. The prior art...

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Problems solved by technology

[0002] After drilling to find oil in the oil field, it is necessary to install a recovery machine to extract the crude oil in the well. In the extraction of crude oil, with the extraction of crude oil, a large amount of colloidal asphaltenes will be precipitated in the wellbore, which will block the oil pipe and affect oil recovery. , at this time, it is necessary to carry out well washing operations, and the construction procedures of well washing operations are cumbersome, costly, and pollute the environment

The anti-scaling operation is low in cost, safe and reliable. The anti-scaling operation needs to use a dosing device, which is connected with the medicine box and the wellhead annulus respectively, and injects the medicament into the wellhead annulus through a plunger pump. The prior art In the anti-scaling equipment, the dosing device at the wellhead has a complex mechanical structure. The return spring is set outside the pump body and is equipped with a shield. The shield is easy to rub against the pump body and generate sparks, which may cause hidden dangers at the wellhead. The return of key parts The position spring is arranged on the outside of the pump body, which is easy to contact with corrosive substances such as air to cause rust and corrosion damage, especially in the oil pumping wells in coastal areas with high air salt content and high humidity, and it is easy to be damaged. The sealing of the dosing device in the prior art is a packing seal, and the sealing performance is poor. At the same time, the drug absorption principle of the dosing device in the prior art is that the large plunger drives the small plunger to move through the hydraulic oil to absorb the medicine. The structure is complex and the transmission efficiency is low. Low

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