API 11AX tubing pump
The raw material of API 11AX tubing pump parts should be inspected after heat treatment, the mechanical properties, chemical compositions and metallographic structures must be inspected by batch. The API 11AX tubing pump parts should be inspected several times during the processing procedure.
- Some key points like the outer diameter of the pump plunger and the inner diameter of the pump barrel should be 100% inspected.
- Sanjack also developed the downhole pumps with various processes of boronizing, nitriding, chrome plating, tungsten plating for special well conditions.
- API 11AX tubing pump manufacturer.
The whole barrel tubing pump has been widely used in mechanical oil recovery in oil fields.
It is a rational rod-type oil recovery equipment for medium and deep wells.
The whole barrel type pump is in accordance with American Petroleum Institute API SPEC 11AX “Subsurface Rod Pump and Its Fittings and GB/T 18607 “Specifications for pumping pump and its components”.
Our company has a history of producing subsurface pumps for more than 50 years.
The products we produce are of good quality and reliable performance and can manufacture pumps with different strokes and clearances according to user requirements.
Our tubing pumps consist of a mechanical support tubing pump, cup support tubing pump, standing valve non-extractable pump.
API type TH pumps are heavy wall, stationary barrel, bottom anchor design tubing pumps.
Available with either 3 cup type hold down (THC) or with a mechanical lock hold down (THM), TH pumps give the largest possible bore size for a given tubing size, meaning the maximum amount of displacement with each stroke and therefore the greatest possible production.
TH API tubing pumps are heavy-walled, stationary barrel pumps recognized by API as a standard design.
They are often used in wells that produce more fluid than an insert rod pump can accommodate.
Unlike rod pumps, the working barrel of these pumps is a section of the tubing string, which enables them to displace more fluid than insert pumps.
The hold down is an independent piece that is typically inserted in the assembly prior to field delivery.
The travelling assembly is installed on the end of the sucker rod string. Tubing pumps include a mechanism on the bottom end of the traveling assembly to retrieve the hold down assembly should the valve require repair.
The API-Type TH tubing pumps feature heavy-walls and full-barrels.
These pumps can be assembled with:
•Box-end and pin-end plungers;
•Cup-type or mechanical seating assemblies;
•Tap-type or lock-type, standing-valve pullers;
All-metal, heavy-wall-barrel tubing pumps combine heavy-duty construction and a stroke-through design with the largest bore possible for any given tubing size to maximize production.
The one-piece barrel eliminates joints susceptible to failure under working loads and is precision honed from end to end to ensure a perfect bore for the plunger and increase pumping efficiency.
These pumps are recommended for the following applications:
• Wells where greater capacity is needed in a given tubing size
• Wells of any depth with severe pumping conditions
• Wells with scale problems
• Deep wells
Heavy-wall, one-piece barrel with special barrel couplings provides a positive seal and superior assembly strength and rigidity to perform in the harshest environments.
• Extension nipples threaded into the barrel couplings permit the plunger to stroke out of the barrel at each end of the stroke. This stroke-through design combats buildup of scale on the inside of the pump barrel.
• Components are offered in a broad range of materials so that pumps can be tailored to any environment for maximum cost efficiency and pump life.
• A variety of exclusive pump accessories extends the range of pump applications to provide greater versatility, adaptability and value.
Structural characteristics and working principle
- Structural Characteristics
The tubing pump is structurally robust and consists of pump barrel plunger, an oil drain (optional), standing valve, and extension nipple.
The pump barrel is installed at the bottom of the tubing, the standing valve is installed under the pump barrel, the plunger is connected to the sucker rod, and the entire plunger is placed in the pump barrel, above the standing valve.
- Working Principle
When the pumping unit is in motion, the sucker rod and the plunger are driven to reciprocate linearly in the pump barrel to recovery oil.
When the plunger is running on the stroke, under the action of the gravity of the liquid column in the oil pipe, the traveling valve is closed, and the pressure in the pump barrel below the plunger is lowered, and the standing valve is opened under the action of the oil pressure in the annular cavity of the casing.
The oil enters the cavity created by the upward movement of the plunger.
When the plunger is stroked down, the standing valve is closed, and the pressure inside the pump barrel under the plunger increases.
The traveling valve is opened, so that when the plunger is stroked, the well fluid passing through the standing valve passes through the cavity of the traveling valve and the plunger during the down stroke, into the annular cavity between the sucker rod and the oil pipe above the plunger.
On the next upstroke, these well fluids are lifted together with the remaining well fluid in the annular cavity of the tubing and sucker rods. In fact, only the upstroke is lifted.
1.Sand content in well fluid ≤0.2%
2.he total salinity dissolved in the well fluid does not exceed 10000mg/L or the chloride does not exceed 6000mg/L, the hydrogen sulfide content is less than 10ppm, and the carbon dioxide content is less than 250ppm.
3.Gas-liquid ratio ≤60m3/m3, well deviation ≤30°
4.Ban touching pumps
|Basic pump diameter||1 1/16||1 1/4||1 1/2||1 3/4||2||2 1/4||2 1/2||2 3/4||3 1/4||3 3/4|
|Pump barrel length||≤34(10363)|
|Stroke ft (mm)||≤32(9754)|
|Connecting tubing thread||2 7/8 NU(EU)||3 1/2 NU(EU)||4NU||4EU|
|Connecting sucker rod thread||3/4 in||7/8 in||1 in|
|Theoretical displacement||0.824 sn||1.140 sn||1.642 sn||2.235 sn||2.918 sn||3.694sn||4.560 sn||5.518 sn||7.707 sn||10.261 sn|
|Maximum outer diameter (mm)||3.5||3.5||3.5||3.5||3.5||3.5||4.25||4.25||4.5||4.6|