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US 4,785,880 AGranted
Apparatus for dispensing chemicals into oil and gas wells
OwnerRobert Ashtoninventor
Life of this patent
Estimating the term…
Abstract
An apparatus for automatically dispensing chemicals into the well bore of a hydrocarbon producing well utilizes a double acting cylinder and piston to sequentially operate a plurality of valves associated with the well. The handles of each valve have a spring steel tine secured thereto which engages with a portion of the piston shaft which actuates the operation of each valve.
Claims16
An apparatus for automatically dispensing chemicals into a well bore of a well comprising:
- an elongate length of pipe, having upper and lower ends, in communication with the well bore;
- at least two valves associated with the length of pipe, each of the valves having a handle associated therewith for opening and closing the valve, one of the at least two valves being normally in a closed position, and the other of the at least two valves being normally in an open position;
- means for selectively actuating the handles of the at least two valves to alternately open and close the at least two valves, the selective actuation means including a valve operator member which is moveable in a direction substantially parallel with the longitudinal axis of the elongate length of pipe;
- means for filling a portion of the elongate length of pipe with the chemicals, the filling means including at least one container of the chemicals;
- and
- means for actuating the filling means, the actuating means for the filling means being operable by the valve operator member;
- whereby movement of the valve operator member in a direction substantially parallel with the longitudinal axis of the elongate length of pipe, in turn, closes one of the at least two valves to isolate a portion of the length of pipe from the well bore, opens the other of the at least two valves to place the portion of the length of pipe in communication with the filling means, and engages the actuating means for the filling means to fill the portion of the pipe with the chemicals;
- and further movement of valve operator member returns the at least two valves to their normal closed and open positions whereby the portion of the length of pipe is in communication with the well bore and the chemicals fall into the well bore.
5 more elements
An apparatus for automatically dispensing chemicals into the well bore of a well, comprising:
- an elongate length of pipe having upper and lower ends, the lower end in communication with the well bore;
- a first valve disposed in the length of pipe, proximate the lower end thereof, the first valve being normally in an open position;
- a second valve disposed in the length of pipe, proximate the upper end thereof, the second valve being normally in a closed position;
- each of the valves having a valve handle operable to open and close each valve;
- a rotatable carrousel member disposed above and adjacent the upper end of the length of pipe, the carrousel member including a plurality of vertical tubular members radially spaced about the carrousel member and adapted to contain cylindrical sticks of chemicals;
- and upon rotation of the carrousel member, a tubular member is indexed and aligned with the open upper end of the length of pipe;
- means for rotating the carrousel member;
- a double acting cylinder and piston shaft disposed adjacent the length of pipe, the longitudinal axis of the pipe and the cylinder being substantially parallel to each other, the piston shaft having attached thereto a valve operator member which is normally disposed below and adjacent the first valve, which upon upward movement of the piston shaft, the valve operator member sequentially engages the first valve handle, the second valve handles and the means for rotating the carrousel member, to sequentially close the first valve, open the second valve, and rotate the carrousel member to permit a stick of chemicals to fall into the open end of the pipe;
- and which upon downward movement of the piston shaft, the valve operator member sequentially engages the second valve handle and the first valve handle, to sequentially close the second valve and open the first valve to permit the stick of chemicals to fall into the well bore.
6 more elements
Dependencies are inferred from the claim text.