Special pump for sand well recovery

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Characteristic

  1. With locking device at bottom, the barrel will not be extended due to the action of liquid column, and the clearance will not increase. So it’s more suitable for deep wells;
  2. A valve blocking device is added to prevent the sand from falling back into barrel, resulting in sand stuck for plunger;
  3. A centralizer is added to increase pump stability and avoid bottom seal failure due to pump swinging;
  4. Sand channel is added to prevent pump from being buried by sand.

Application

1.Suitable for pump depth is within 2900m and well liquid viscosity below 400cP

2.Suitable for wells which has frequent sand stuck when stopping pumping.

3.Suitable for wells with sand cut≤2%

 

The plunger is equipped with a sand scraping assembly to clean the sand on inner wall of the barrel, prevent the pump from sand stuck.

Characteristic: The sand scraping assembly on the plunger can clean the sand on the inner wall of barrel, then the sand is discharged by liquid flow.

  1. Prevent plunger from sand stuck.
  2. Reduce the abrasion between plunger and barrel.Prolong the service life of the pump.

Application

1.Suitable for the thin oil wells without sand burial problems.

2.Not suitable for high gas cut wells, which has frequent gas locking.

3.Suitable for wells with sand cut≤2%.

Application

1.Suitable for the thin oil wells without sand burial problems.

2.Not suitable for high gas cut wells, which has frequent gas locking.

3.Suitable for wells with sand cut≤2%.

Characteristic

  1. The special structure has reduced the resistance on plunger, suitable for heavy oil recovery.
  2. The sand-settling centralizing and locating device can prevent from sand stuck.
  3. The sealing & rotary device can relieve the reverse torque of making up or breaking out the tubing, making the operationeasier.
  4. It can drain the oil when need lifting and inspecting the pump.

Application

  1. Suitable for wells with viscosity of crude oil≤4000Mpa.s;
  2. Suitable for wells with sand cut≤1.2%;
  3. Not apply to the wells which has high gas cut and frequent gas locking.

on pump

It is suitable for single-well requires steam injection for thermal recovery. It is a pump can realize simultaneous steam injection and recovery and anti sand stuck.

Features

  1. Both steam injection and oil recovery: The conversion between steam injection and oil recovery is simple and reliable. When injecting steam, simply lower the plunger assembly to the end to expose the steam injection hole and then inject steam. After steam injection, the plunger is lifted to cover the steam injection hole and then the recovery can be performed which can timely exert the thermal recovery effect of steam injection and reduce the cost of oil recovery.
  2. Anti sand stuck: Short plunger and long plunger structure are adopted. During normal oil recovery, the plunger is always outside the barrel, which can reduce the occurrence of sand stuck.
  3. The steam injection hole has the function of draining oil: during operation, lift the plunger to realize the draining of oil. Ensure safe and civilized production at the operating well site and saving operating costs.

Application

Suitable for single well that requires steam injection for thermal recovery.

It can prevent scaling and damage of barrel after steam injection and can prevent falling objects.It is suitable for single well with injection-recovery dual-purpose .

Features

1.The special structure makes barrel non-scaling and damaged after steam injection and can prevent falling objects from entering the pump cavity.

2.Special structure prevents damage to the casing by steam injection.

3.The bottom of plunger is equipped with a special structure to prevent the high temperature and high pressure in the tubing string from damaging the plunger.

 

Application

Suitable for single well that requires steam injection for thermal recovery.

Characteristic

1.The traveling valve adopts a mechanical valve structure which will open/close with sucker rod going up and down.

2.The sealing function is separated from the stress of plunger, greatly improving the service life of the pump.

3.The plunger is of floating structure with self-repair function, which can prolong the service life of valves .

Application

1.Can achieve cold production at 50 ℃ and crude oil viscosity within 4000mpa.s.

2.Suitable for wells with gas-oil ratio lower than 800;

3.Can be used in wells that with a slant degree less than 40°.

Characteristic

  1. Has short barrel, long plunger, and the barrel has high wear resistance.

2.Both ends of plunger will always be out of barrel to prevent sand from going into barrel, avoiding sand stuck.

3.There is a sand passage between the inner barrel and outer barrel, along which sand can enter in tubing. So that sand will not bury the pump.

Application:

1.Suiteble for sand wells in which sand stuck often happens when pump stops running.

2.Not suitable for high gas cut wells, which has frequent gas locking.

  1. Must not be used at inflection point or below it.
  2. Suiteble for sand cut ≤3.2%。

 

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