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US 4,375,946 AGranted
Well pump
OwnerJohn S. Page, Jr.inventor
Life of this patent
Estimating the term…
Abstract
Well fluid pumping apparatus comprises: (a) body structure defining an upright plunger bore, (b) a plunger reciprocable in that bore, (c) the body structure also defining a chamber sidewardly offset from an axis defined by the plunger bore and communicating with the bore, and (d) valving carried by the body structure to pass intake fluid via the chamber into the plunger bore in response to stroking of the plunger in one direction in the bore, and to pass discharge fluid from the plunger bore into and from the chamber in response to stroking of the plunger in the opposite direction in the bore.
Claims12
In well fluid pumping apparatus, the combination comprising
- (a) body structure defining an upright plunger bore,
- (b) a plunger and a plunger stem reciprocable in said bore,
- (c) the body structure also defining chamber means sidewardly offset from an axis defined by said plunger bore and communicating with said bore, and
- (d) lower valve means carried by said body structure to pass intake fluid via said chamber means into said plunger bore in response to stroking of the plunger in one direction in said bore, and to pass discharge fluid from said plunger bore into and from said chamber means in response to stroking of the plunger in the opposite direction in said bore,
- (e) the plunger bore into which liquid is passed being below the level of said valve means, the plunger extending generally vertically, the bore being open to the well below the apparatus,
- (f) the valve means including an elastomeric sleeve extending about an axis defined by the plunger, the sleeve being radially movable away from valve ports defined by said valve means to allow said passage of fluid into said plunger bore, and the sleeve being radially movable toward said ports to close the ports during said passage of fluid from said plunger bore, the stem extending upwardly through said sleeve,
- (g) upper valve means including valve elements located above the level of the lower valve means, one of said valve elements being movable relative to the other element and the valve elements when relatively open defining an annularly extending flow path which is upwardly open, the stem being reciprocable with the plunger, independently of movement of said movable element, the stem extending upwardly through said upper valve means,
- (h) guide means associated with one element of the upper valve, said stem extending through said guide means for reciprocation relative to said guide means,
- (i) the plunger having an up-position in which it is openly spaced below the lower valve means, and the plunger bore extending downwardly from a location immediately below the lower valve means whereby a straight through annular flow path is provided in approximate alignment with said flow path through the upper valve means for passing fluid flow upwardly from said bore and through the elastomeric sleeve and the upper valve means, in response to upward movement of the plunger,
- (j) the entirety of the lower valve means located within a vertical extension of a cylinder defined by an outer surface of said body.
7 more elements
In well fluid pumping apparatus, the combination comprising
- (a) body structure defining an upright plunger bore,
- (b) a plunger reciprocable in said bore,
- (c) the body structure also defining chamber means sidewardly offset from an axis defined by said plunger bore and communicating with said bore, and
- (d) valve means carried by said body structure to pass intake fluid via said chamber means into said plunger bore in response to stroking of the plunger in one direction in said bore, and to pass discharge fluid from said plunger bore into and from said chamber means in response to stroking of the plunger in the opposite direction in said bore,
- (e) the plunger bore into which liquid is passed being below the level of said valve means, the plunger extending generally vertically,
- (f) the valve means including an elastomeric sleeve extending about an axis defined by the plunger, the sleeve being radially movable away from valve ports defined by said valve means to allow said passage of fluid into said plunger bore, and the sleeve being radially movable toward said ports to close the ports during said passage of fluid from said plunger bore,
- (g) the valve means including annular valve stopper and seat elements through which a plunger stem extends, the stem being reciprocable with the plunger, independently of movement of the stopper element,
- (h) movable guide means integral with the stopper element, and through which said stem extends for reciprocation relative to said guide means,
- (i) and including a tensioning piston integral with the stem, the piston having a fluid pressure receiving surface facing upwardly within the movable guide means which is tubular.
6 more elements
Dependencies are inferred from the claim text.