Quill Injection SI

Description

Quill Injection SI plays an important role in pipeline maintenance. The chemical injection and sampler are the end devices of the chemical injection system or the piping medium sampling system.

Sampling & Injection Point

Installation Method

1. First, the staff wraps the sealing strip on the threaded end of the dropper. Then connect it to the NPT fitting of the injection nut. Then tighten.
2. In the second step, we put the main seal packing on the screw of the plug. And have its larger end facing the center of the stopper.
3. We attached the other thread of the injection nut to the screw of the plug. Then tighten it, and then tighten the set screw.
4. Now we temporarily fix the flange seat of the equipment to the mounting flange of the pipe. But don’t tighten it for now.
5. Secure the assembled stopper injection assembly on the flange seat and tighten it.
6. Then loosen the connection to the mounting flange. We took out the whole device and determined the orientation of the bevel of the injection cannula. After this, adjust the orientation. This makes the inclination of the spray sleeve opposite to the flow direction of the medium. Opposite of the nozzle. Measure or visually inspect the angle between the position of the tee port or tee flange adapter and the desired position.
7. Remove the fitting body from the plug injection assemblies. Rotate counterclockwise at a certain angle to loosen the fastening screw of the injection nut. Then screw it up.
8. If the injection body is in Tee port shape. Please wrap a sealing strip at two ends of the NPT tube with one end connected to the T-type side opening on the flange pedestal. And the other to the valve end, and screw up.

Attention

1. The operator should wear articles for labor protection and carry out installation and operation in accordance with relative standards for instruments and equipment.
2. In the case of under-pressure operation, any part of the operator’s body is not allowed to close to the interface port of the device to prevent medium leakage and damage during operation.

The chemical injection system can quantitatively inject chemical agents into the drilling or gathering system. Therefore, it can meet the normal production needs of oil (gas) wells.

Performance characteristics:

1. It can easily adjust the output pressure and flow arbitrarily;
2. It can be used for pipes of various pressure levels;
3. We can customize its materials according to your needs.
4. The main components are produced with high-quality raw materials. Which ensures the quality of the equipment.

In a word, if you have any other questions about Quill Injection SI, please contact our professionals to answer them for you.

Corrosion control measures for water injection system of offshore oil and gas fields

Overview

Oilfield water injection is one of the effective means to maintain formation pressure and improve oil recovery. It is widely used at home and abroad. However, in practical application, the water injection system appears corrosion and scaling problems. This will lead to substandard water quality and increased water injection pressure. Therefore, it will reduce the formation pressure and affect the normal production of the oilfield. At present, the water injection system of offshore oil and gas fields generally uses seawater/infiltration water and production water as the water source.

Corrosion causes seawater

Influence of drug compatibility

Seawater contains numerous corrosion factors. Such as dissolved oxygen, bacteria, and scaling ions. Deoxidizer, bactericide, scale inhibitor, reluctant. And other agents need to be added in the process. At the same time, the incompatibility of agents may lead to the reduction of agent effect, scaling, and other risks.

Bacterial influence

There are many kinds of bacteria in seawater. SRB can cause pitting corrosion. It will also block the pipeline by consuming sulfate metabolism to produce H2S and generate FES in the water. This will cause comprehensive damage to the water injection system.

Effect of dissolved oxygen

Seawater contains a large amount of dissolved oxygen. This will accelerate the corrosion of the water injection system. Deoxidizers can effectively remove dissolved oxygen in the water. However, it is necessary to ensure that the whole process is well sealed.

Corrosion control measures for water injection system

Drug compatibility

The filling position, compatibility, and other factors shall be fully taken into account in the filling of the agent. The pipeline used for continuous dosing shall extend into the pipeline/equipment. So that the medicine can be well dispersed. It is possible to prevent the mixing action of the high-concentration agent.

Sterilization

The bactericide is added to remove the bacteria in the water injection system. While reducing secondary H2S. The bactericide should be injected regularly by online impact. In addition, we should fully consider the filling mode and location of the bactericide.

For example, in an offshore platform, bactericide is filled at the air flotation inlet. Because the upper layer of the dual media filter has a small density and large particles. The lower layer has the opposite. So its interception ability is gradually enhanced. In this way, the bactericide can not penetrate the filter layer to act on the downstream process. And breed bacteria at the bottom of the lower filter material.

At this time, we can inject the bactericide into the backwash process to improve the sterilization effect. At the same time, it was noted that long-term use of a fungicide would make bacteria establish drug resistance. Even this will stimulate the reproduction of certain organisms. We should adjust the type and dosage of bactericide. According to the process to improve the germicidal effect.

Removal of dissolved oxygen

Adding deoxidizer in the process can effectively remove dissolved oxygen in the water. However, it shall be ensured that the whole process is well-sealed. For example, when the whole process of infiltration water injection system of an offshore platform monitors dissolved oxygen. Dissolved oxygen at the inlet of the prefilter is less than 50ppb. The dissolved oxygen at the outlet of the export pump is greater than 300ppb.

Anti-scaling and descaling

The anti-scaling agent is selected according to the scaling tendency of different injected water to reduce the scaling probability. When selecting an anti-scaling agent, we should consider compatibility, economy, and practicability with other agents. In particular, the water quality compatibility test shall be carried out for the two streams and the formation water before the new streams flow in. We should regularly carry out pipeline pigging, surface equipment cleaning, and other descaling operations.

Adjusting ions

Change the composition of ions in water to remove unstable ions. For example, an iron ion stabilizer is added in the process to reduce the content of free ferrous ions. Reduce FeCO3 and FES precipitation during oil, gas, and water treatment.

Removal of suspended solids

Use the net flapping effect of the flocculant. This allows the suspended particles in the sewage to settle quickly and remove suspended solids.

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