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.

Abstract: A well sucker rod shock absorber apparatus employs cushion means located transversely of the rod string. Cushion means may also be located in association with the drive for the pumping unit that reciprocates the rod string.

Abstract: A pumping unit pumps two wells, simultaneously, to save energy and space, weight of one rod string offsetting weight of the other string.

Abstract: A well tubing drain assembly includes a tubing wall containing a bore intersecting the tubing interior and a counterbore intersecting the tubing exterior, an annular retainer in the counterbore having connection to the wall, the retainer forming a side drain passage, a retainer member carried by the retainer and projecting into the drain passage, a closure in alignment with the drain passage and retained by the member at the side thereof closest to the tubing bore interior, the closure closing off said tubing wall bore, the closure adapted to be blown out the drain passage when fluid pressure in the tubing bore transmits sufficient force via the closure to rupture said member, and a sealing washer located in the counterbore and extending about the closure to have sealing engagement therewith in response to pressure exerted on the washer by the fluid in the tubing.

Abstract: Athletic training apparatus includes a frame to be lifted by an athlete's shoulder, and shifted from side to side, there being weight on the frame. The frame includes an elongated horizontal member having spaced apart pads attached at one of its ends and having a skid, roller or being pivotally anchored at its other end. The frame further includes a weight member which can be slidably adjusted lengthwise between the ends of the elongated frame member. The weight member includes an upstanding post attached to a slider for receiving weights.

Abstract: A well tubing anchor incorporates means to suddenly unblock movement of slips relative to a wedge surface upon predetermined build-up of well fluid pressure exerted on a piston or pistons that urge the slips axially.

Abstract: A surface controlled, sub-surface well valve includes a main valve, a main valve actuator, and a control pressure responsive pilot valve to control application of control pressure to the actuator. The construction is such that the effects of excessive control pressure due to well depth are obviated.

Abstract: A surface controlled, sub-surface well valve includes a main valve, a main valve actuator, and a control pressure responsive pilot valve to control application of control pressure to the actuator. The construction is such that the well valve is not affected by changes in pressure of the production flow, or excessive static control pressure in relation to production flow pressure, and irrespective of the depth at which the valve is installed in the well.

Abstract: A well tubing anchor incorporates means to delay movement of slips relative to a wedge surface until predetermined well fluid pressure is exerted on a piston or pistons that urge the slips axially.

Abstract: A well safety valve comprises:A tubing in a well and having a first side port through which well production fluid is flowable,B first means including a valving sleeve movable up and down between predetermined positions on the tubing to control flow of production fluid through said port, said means having surfaces exposed upwardly and downwardly to said flow and characterized in that the upward force exerted by said flow on said means is substantially equal to the downward force exerted by said flow on said means,C said means having a control surface to receive selective application of control fluid pressure for moving the sleeve valve in one direction between said positions.