Downhole Pump Sand Coupling Segmented Barrel Design
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Solution Overview
Problem
Pump jacks with downhole pumps face sand damage issues between the barrel and plunger assembly, leading to inefficiencies and increased maintenance costs, as well as environmental risks due to gas leakage and shorter equipment lifespan.
Innovation Solution
The design incorporates multi-segment barrels with sand and wiper couplings to prevent sand from entering the metal surfaces, using hollow cylindrical bodies with inner grooves and wiper rings to create seals, allowing for efficient fluid compression and minimizing maintenance needs by enabling partial barrel replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sand enters between the barrel and plunger assembly, then sand damage occurs leading to grooves and reduced pump lifespan, but preventing sand entry requires additional protective structures that increase device complexity
Solution Approach 1:
A sand coupling with a hollow cylindrical body and inner groove is introduced as an intermediary component between the barrel segments. This sand coupling acts as a mediator that captures and contains sand particles in its groove, preventing them from reaching and damaging the metal surfaces of the barrel and plunger assembly.
Solution Approach 2:
The barrel is divided into multiple stationary segments that are fluidly connected in series. This segmentation allows the barrel to be assembled with sand couplings positioned between segments, creating a modular structure that can be maintained by replacing only affected segments rather than the entire barrel.
2Reliability
If the entire barrel must be replaced when sand damage occurs, then pump lifespan is extended through proper maintenance, but maintenance time and cost increase significantly
Solution Approach 1:
The barrel is segmented into multiple stationary sections that are fluidly connected in series, with sand couplings positioned between segments. This segmentation enables maintenance personnel to replace only the specific barrel segment that has suffered sand damage, rather than replacing the entire barrel assembly, thereby reducing maintenance time and cost.
3Object-affected harmful factors
If sand damage occurs between barrel and plunger, then repair costs increase and environmental risks arise from gas leakage, but implementing protective measures increases initial equipment cost
Solution Approach 1:
The sand coupling serves as a protective intermediary component that intercepts sand particles before they can damage the barrel and plunger assembly. By containing sand in its hollow body with an inner groove, it prevents the harmful effects of sand ingress while being a relatively simple and cost-effective solution compared to the costs of repair and environmental remediation.
Data Source
AI summary
A pump jack has a horse head, a sucker rod connected to the horse head, and a downhole pump connected to the sucker rod. The downhole pump has a reciprocating plunger, a multi-segment barrel, a plurality of sand couplings, and a plurality of wiper couplings.