Integrated Surface Treatments and Coatings for Artificial Lift Pump Components
AssigneeSchlumberger Technology Corporation
InventorsBing Han, Manuel Marya, Yuteng Liang
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Abstract
Artificial lift pump components such as couplings are disclosed, all having a body formed from a selected material, the body having an inner diameter and an outer diameter, a first surface treatment introducing carbon, nitrogen, boron into the material to form a first and hard layer, and a second layer defined as an deposited coating to the first layer that is also made of a carbon, nitrogen, or boron and is further characterized as being ceramic like (hard) and having a low-friction.
Claims20
A method for producing pump components for artificial lift comprising:
- selecting a material for machining, the material forming an item for production;
- performing a surface treatment, among nitrocarburizing and boronizing processes, to produce a case hardening on the item;
- performing a grinding of the nitrocarburized or boronized surface on the item;
- and
- performing a coating deposition process for producing an exterior coating comprising primarily carbon, nitrogen, or boron on the item
A component for an artificial lift pump system, comprising:
- a body formed from a material;
- a first carbon, nitrogen, and/or boron layer introduced from the exterior surface of the material with case depth in excess of 25.4 micron-meters;
- and
- a second layer placed on the first layer that is equal or less than 25.4 micron-meters.
A component for a sucker rod pump system, comprising:
- a body formed from a steel with less than 0.4% carbon, the body having an inner diameter and an outer diameter;
- a first carburized layer placed on the outer diameter on an exterior surface of the steel;
- and
- a second layer made of a diamond like coating placed on the first carburized layer.
The component according to claim 20 wherein the second layer is between 2.0 and 25.4 micron-meters in thickness.
Dependencies are inferred from the claim text.