A elongated plunger assembly for pressurized, conduit-enclosed travel utilized in recovery of hydrocarbon deposits in a ground penetrating oil or gas well. The plunger comprises an elongated mandrel, a plurality of radially movable curvilinear wear pads circumferentially disposed adjacent each end o
A elongated plunger assembly for pressurized, conduit-enclosed travel utilized in recovery of hydrocarbon deposits in a ground penetrating oil or gas well. The plunger comprises an elongated mandrel, a plurality of radially movable curvilinear wear pads circumferentially disposed adjacent each end of the elongated mandrel, a pad-edge retaining housing extending on at least one end of the elongated mandrel to enclosably retain the longitudinally distal end of a circumferential array of wear pads onto the mandrel, and a centrally disposed wear pad securement ring arrangement to permit release of a worn wear pad, replacement of the worn wear pad at an inner longitudinal edge thereof, thus to permit simple field-accessable removal and replacement of any particular “conduit-worn” “wear” pad from the mandrel of the plunger.
대표청구항▼
1. An elongated plunger assembly for pressurized, conduit-enclosed travel utilized in recovery of hydrocarbon deposits in a ground penetrating oil or gas well, comprising: an elongated mandrel;a plurality of replaceable, radially movable curvilinear wear pads circumferentially disposed adjacent each
1. An elongated plunger assembly for pressurized, conduit-enclosed travel utilized in recovery of hydrocarbon deposits in a ground penetrating oil or gas well, comprising: an elongated mandrel;a plurality of replaceable, radially movable curvilinear wear pads circumferentially disposed adjacent each end of the elongated mandrel;a wear pad edge-retaining housing extending on each end of the elongated mandrel to enclosably retain the longitudinally distal end of the replaceable wear pads onto the mandrel of the plunger assembly;a centrally disposed pad securement ring arrangement to simultaneously secure and permit release of an inner longitudinal edge of at least one wear pad from the plurality thereof, thus to permit simple removal and replacement of any particular conduit-worn wear pad from the mandrel of the plunger, wherein the curvilinear wear pads are biased radially outwardly by a plurality of spring members extending radially outwardly from the body of the elongated mandrel, wherein the centrally disposed pad securement ring arrangement is secured to a central ring-ridge by a releasably controlled bolt member therethrough, wherein a single bolt member secures a semi-circular securement ring to the central ring-ridge, and wherein the semi-circular securement ring has a biasable lock washer receiving opening for receipt of a releasable lock washer member therein. 2. The elongated plunger assembly as recited in claim 1, wherein the releasable lock washer has spring strength indicia arranged thereon. 3. The elongated plunger assembly as recited in claim 1, wherein the curvilinear wear pads are biased radially outwardly by a plurality of spring members extending radially outwardly from the body of the elongated mandrel. 4. The elongated plunger assembly as recited in claim 1, wherein the wear pad retaining housing comprises a cylindrically shaped shoe on a lower end of the mandrel. 5. The elongated plunger assembly as recited in claim 4, wherein the shoe on the lower end of the mandrel has an array of spiraled flutes thereon to effect rotation of the plunger during its travels in a well. 6. The elongated plunger assembly as recited in claim 4, wherein the releasable lock washer has a visable spring-capacity indicator thereon to indicate to field repair personnel the stiffness-capacity of the springs being utilized to bias each wear pad outwardly. 7. The elongated plunger assembly as recited in claim 1, wherein the wear pad retaining housing on the lower end of the mandrel has an electronic sensor enclosure therein to protect and replaceably enclose a electronic sensor monitoring and control mechanism therein. 8. The elongated plunger assembly as recited in claim 7, wherein the sensor in the pad retaining housing is in communication with a sensor embedded within a wear pad attached to the mandrel of the plunger. 9. The elongated plunger assembly as recited in claim 1, wherein the wear pad is of a curvilinear parallelogram shape to facilitate even wear thereof. 10. An elongated plunger assembly for pressurized, conduit-enclosed travel utilized in recovery of hydrocarbon deposits in a ground penetrating oil or gas well, comprising: an elongated mandrel;a first and a second annular array of replaceable, radially movable curvilinear wear pads disposed on the elongated mandrel, and spaced longitudinally apart from one another;a wear pad-edge retaining housing extending on each end of the elongated mandrel to enclosably retain the longitudinally distal end of the pads onto the mandrel; anda centrally disposed pad securement ring arrangement to simultaneously secure and permit release of an axially-inner longitudinal edge of at least one wear pad from the plurality thereof, thus to permit simple removal and replacement of any particular conduit-worn wear pad from the mandrel of the plunger. 11. The elongated plunger assembly as recited in claim 10, wherein the centrally disposed wear pad securement ring arrangement is secured to a central ring-ridge by a releasably controlled bolt member therethrough. 12. The elongated plunger assembly as recited in claim 11, wherein the semi-circular securement ring has a lock washer receiving opening for receipt of a releasable lock washer member. 13. The elongated plunger assembly as recited in claim 12, wherein the releasable lock washer has at least one bendable tab thereon, to releasably secure the bolt thereby. 14. The elongated plunger assembly as recited in claim 10, wherein a single bolt member secures a semi-circular securement ring to the central ring-ridge. 15. The elongated plunger assembly as recited in claim 10, wherein at least one of the wear pads has a spiral array of grooves thereon to indicate levels of wear thereon, to facilitate rotation of the plunger, and to generate turbulence during the plunger's travels within the well's tubing. 16. A method of replacing at least one worn arcuate outer wear pad from a plunger assembly used in an oil or gas recovery well operation, comprising: arranging a first circumferential set and a second circumferential set of biased outwardly, elongated, arcuate wear pads on an elongated oil/gas well plunger mandrel, each of the circumferential sets being disposed longitudinally apart from one another on the mandrel;securing the respective longitudinal ends of one annular set of the outer elongated arcuate wear pads to the mandrel by a retrieval neck member screwed onto an end of the mandrel;securing the inwardly directed ends of the one annular set of the outer elongated arcuate wear pads to the mandrel by a wear pad securing split ring releasably bolted to the mandrel. 17. The method as recited in claim 16, wherein the wear pad securing split ring comprises a pair of semi-circumferential bands releasably attachable to the mandrel each by a bendable, field-accessable lock washer. 18. The method as recited in claim 16, wherein the semi-circumferential bands are secured to a load bearing annular ridge of the mandrel.
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이 특허에 인용된 특허 (1)
Gray, William R.; Holt, James H., Plunger with flow passage and improved stopper.
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