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Dosing of inhibitors of hydrate formation in oil and gas industry.

Continuous feed units of methanol.

 

 


 

Methanol injection

 

Gas hydrates are formed in the technical systems of gas production:

  • Bottomhole formation zone
  • Well
  • Train
  • Infield manifold
  • Gas preparation system
  • The gas transmission system (pipelines)
  • Gas distribution stations
  • Installation of gas processing

 

The change in the temperature and pressure of the gaseous surrounding causes the formation of technical hydrants that violates the processes of production, transportation and processing of gas. Even in the southern climate zone drilling fields can not avoid the problem of hydrate formation due to large fluctuations in daily temperature, but the frequency of formation of hydrates in the South less than in the North.

To control the formation of hydrates there are several ways, but the most effective of them is the introduction of a hydration inhibitor – methanol.

90 % of gas in Russia has a Northern origin since it is extracted in the Yamalo-Nenets Autonomous district, in the district of the far North. During its production as the hydration inhibitor methanol is used only.

In the design and development of new fields (Nadym, Yamal) in the technology of production and processing methanol use is included as a hydration inhibitor.

 


 

The advantages of BNDR Areopag units for dispensing methanol

  • Reliability and leak free at pressures up to 250 bar.
  • Long life membrane (10,000 hours and more). Simple and quick replacement of the membrane.
  • Several options for signaling a rupture of the membrane.
  • Gap 1 membrane is not an emergency case, dosing is continued until the maintenance or workflow stoppage.
  • The process of regularly addition of oil to the feed tank is not required. Staff is required to periodically check the oil level and to replace it.
  • Modern compact plunger seals without tightening.
  • The continuous monitoring of seal and amount of leakage through it is not required. Increased service life of plunger seals and a pair of plunger.
  • Low maintenance requirements and reliable monitoring tools work allow to use the flow units of methanol in places of low temperatures and also in case of remote control.

 

   

Other benefits

Compact modular design allows to install the units in small spaces or block boxes.

High speed continuous dispensing.

Low ripple in modular design of the metering pumps.


 

Methanol is the reagent that can be used not only to prevent hydrate formation, but also to control the already-existing hydro sediments.

 

Why methanol?

  1. Low cost in comparison with the cost of other inhibitors of hydrate formation
  2. Large production volume..
  3. High anti-hydrate activity
  4. Retains its properties at low temperature
  5. The low temperature of the freeze concentrated solutions and low viscosity at low ambient temperatures ( - 40 °С -50 °С)
  6. Methanol production does not require large production capacity, its production is economically justified when you spray gas directly at the gas facility.

7. Input and distribution of methanol the block of preparation of the reagent is not required, which reduces the cost of the production line.

8. Introduction of methanol does not increase the corrosion of metals in systems of production, preparation and transportation of gas.

9. The possibility of using aqueous solutions of methanol, technical methanol, low quality requirements of the inhibitor.

10. The ability and ease of regeneration of spent solutions.

11. The effectiveness of methanol injection in the problem solution of the non-continuous hydrate plugs elimination in wells, reservoirs, systems, gas treatment, compressors and pipelines.

   

The usage of methanol, like any chemical substance has the complexity and the main one – high toxicity (effects on the human body by inhalation and in contact with the skin and in the human body.

To protect the staff and to reduce the effect of methanol on the environment, company Areopag uses in methanol dosing blocks of methanol dosing new dosing equipment - diaphragm dosing pumps, the design of which ensures no leakage of the pumped fluids into the environment.

 


 

 Dosing equipment

 

Dosing pump open type units based on frame

Dosing blocks (BNDR) – block of continuous reagent dosing can be complected on the basis of the electric pumps of piston or diaphragm units, and also   with an additional equipment according to the technological requirements of the customer. 

Borehole installation of chemical dosing (BIDCR, DPM)

Dosing blocks are designed for chemicals supply in oil and gas wells and in pipelines of gathering and transportation of oil to protect the oil equipment from corrosion, salt depositions, paraffin, etc.

Reagent batching blocks (mini BRF)

Light and mobile design of the block allows you to use it without a foundation and mix depending on production requirements.

The block of reagent equipment (BRF, DC, UD)

Blocks of continuous reagent dosing in a heated shelter units designed for automatic injection of chemicals into a pipeline of commercial collection, transportation and preparation of oil. 

Mobile block of reagent facilities 

MBRE– Designed  for preparation, transportation and dosing injection of a neutral, toxic and flammable liquid chemical reagents in the annulus of oil and gas wells and also in pipelines.

Methanol supply block, EG, DG

Blocks are intended for supplying methanol or glycol in gas wells, gathering pipelines and transportation of gas to prevent hydrate plugs and deposits, and also for providing EG, DG and TG for gas dehydration and regeneration of the spent glycol.