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US 4,049,057 AGranted
Paraffin cleaner
OwnerWilliam Stan Hewesinventor
Life of this patent
Estimating the term…
Abstract
A valve unit is placed in the eduction tube of an oil well. The unit has two valves therein, one to discharge fluid from the eduction tube into the annulus between the tube and the casing and the other to receive fluid from the annulus into the eduction tube. The ball of the valves are held against a seat by cupped or "Belville" washers. The valves are located within an enlarged cylindrical portion of the eduction tube.
Claims7
In an oil well having
- a. an eduction tube within
- b. a casing;
- An improved value unit comprising:
- c. a tubular body,
- d. said body having a cylindrical exterior portion having an axis,
- e. said body having a cylindrical bore therethrough having an axis parallel to, but eccentric from, said exterior portion axis,
- f. joint means on each end of the body for connecting the body to the eduction tube,
- g. said joint means concentric with said bore, and
- h. out pressure relief valve means in said body for flowing high pressure fluids from said bore,
- j. in pressure relief valve means in said body for flowing high pressure fluids into said bore.
7 more elements
In an oil well having
- a. an eduction tube within
- b. a casing;
- An improved value unit comprising:
- c. a tubular body,
- d. said body having a cylindrical exterior portion having an axis,
- e. said body having a cylindrical bore therethrough having an axis parallel to said exterior portion axis,
- f. joint means on each end of said body for connecting the body to the eduction tube,
- g. said joint means concentric with said bore,
- h. a valve bore into said body with an axis parallel to said body axis,
- j. a plug plugging said bore,
- k. a valve seat in said bore,
- m. a ball on said seat between the seat and the plug,
- n. an outside opening from said valve bore to the outside of the body between the valve seat and plug,
- o. a bore opening from said valve bore to the cylindrical bore on the other side of the valve seat from said plug,
- p. an elongated cup in the valve bore extending from said plug to said ball, and
- q. a plurality of cupped whashers in said cup,
- r. a second valve bore into said body with an axis parallel to said body axis,
- s. a plug plugging said second bore,
- t. a valve seat in said second bore,
- u. a ball on said seat between the seat and plug,
- v. a bore opening from said second valve bore to the cylindrical bore between said valve seat and plug,
- w. an outside opening from said second valve bore to the outside of the other side of the said valve seat,
- x. an elongated cup in the second valve bore extending from said plug to said ball, and
- y. a plurality of cupped washers in said cup.
21 more elements
In an offshore oil well having
- a. an eduction tube, within
- b. a casing;
- An improved method of treating a well from within the eduction tube without polluting the environment comprising:
- c. placing
- i. an in pressure relief valve for flow from the annulus of the casing into the tubing adjacent to
- ii. an out pressure relief valve for flowing from the tubing into the annulus,
- d. pumping treatment fluids into the eduction tube, thus
- e. opening the out pressure relief valve so that the eduction tube contents are pumped into the annulus between the tube and casing, then
- f. pumping neutral fluids into the annulus, thus
- g. opening the in pressure relief valve so that the eduction tube contents are returned thereto.
7 more elements
Dependencies are inferred from the claim text.