Elongated flow stopper in standing valve of bottom hole spring assembly for facilitating production of hydrocarbons

A flow stopper for a standing valve within a bottom hole spring assembly for facilitating production of hydrocarbons from a subterranean well, the bottom hole spring assembly including a tubular cavity within a housing wherein the standing valve prevents backflow of a fluid column to allow a surface controlled plunger system to remove the fluid column, the housing having a plurality of ports providing fluid access to the tubular cavity, wherein:

• the flow stopper is moveable between a first position and a second position within the tubular cavity;
• the flow stopper in the first position is adjacent to a seat of a bottom port of the ports thereby obstructing fluid flow through the bottom port;
• the flow stopper in the second position is away from the seat of the bottom port thereby allowing fluid to flow through the bottom port;
• the flow stopper has an elongated shape;
• and
• the elongated shape has a concave section such that the flow stopper can impact a line running along an inner surface of the housing in a lengthwise direction of the tubular cavity, the concave section allowing the flow stopper to impact the housing with a first point of contact and a second point of contact on the line, the concave section ensuring that the first point of contact and the second point of contact are separated by a gap where the flow stopper does not contact the inner surface of the housing on the line.