Pipe wiper system
AssigneeCameron Equipment Co.
InventorsJames R. Cameron, Benton F. Baugh
Life of this patent
Estimating the term…
Abstract
A pipe wiper assembly for stripping fluid from oil and gas well strings which has a pair of rams which can move from a first remote position relative to the pipe forward to a second position contacting and wiping the pipe and forward to a third position when the pipe is not in the oil or gas well to protectively cover the well, the rams being mounted in a carrier which has freedom of movement in any radial direction to allow the rams to be centralized around the oil or gas well string. The unit having alignment guides such that when the rams are returned to the first position the rams and carrier will be centralized over the well bore and the freedom of radial movement is eliminated.
Claims18
An assembly for stripping liquid from the external surface of a tubular article being pulled from a well, comprising
- an elongated housing having a bottom including a first opening allowing for the vertical passage of said tubular article therethrough and a first and second housing guidance means;
- a carrier having a second opening therethrough and being mounted for movement in the housing between a first position where the first and second openings are generally aligned and a second position where the first and second openings are eccentric and laterally offset from the central longitudinal axis of the housing;
- first and second wiper rams mounted on the carrier for movement between a closed position for stripping liquid from the tubular article as it is pulled from the well and an open position, and further wherein each of said first and second wiper rams has a ram guidance means which is adapted to cooperate with a respective one of said first and second housing guidance means;
- at least one actuator for moving said first and second wiper rams between said open and said closed positions;
- and
- said ram guidance means and said housing guidance means cooperate in such a manner whereby movement of said wiper rams toward said open position causes said carrier to be moved to said first position.
An assembly for stripping liquid from the external surface of a tubular article being pulled from a well, comprising
- a housing for mounting to equipment on said well and having a bottom including a first opening allowing for the vertical passage of said tubular article therethrough;
- a carrier having a second opening therethrough and being mounted for movement in the housing between a first position where the first and second openings are generally aligned and a second position where the first and second openings are eccentric;
- upper and lower wiper rams mounted on the carrier for movement between a closed position for stripping liquid and, the tubular article as it is pulled from the well and an open position;
- at least one actuator mounted on said carrier for moving said upper and lower wiper rams between said open and closed positions;
- and
- means on said rams and said housing which cooperate in such a manner whereby movement of said wiper rams toward said open position causes said carrier to be moved to said first position.
An assembly for stripping liquid from the external surface of a tubular article being pulled from a well, comprising
- a housing for mounting to equipment on said well and having a bottom including a first opening allowing for the vertical passage of said tubular article therethrough;
- a carrier having a second opening therethrough and being mounted for movement in the housing between a first position where the first and second openings are generally aligned and a second position where the first and second openings are eccentric;
- wiper rams mounted on the carrier for movement between a closed position for stripping liquid from the tubular article as it is pulled from the well and an open position;
- at least one actuator mounted on said carrier for moving said wiper rams between said open and closed positions;
- means on said rams and said housing which cooperate in such a manner whereby movement of said wiper rams toward said open position causes said carrier to be moved to said first position;
- said at least one actuator having a first actuator end and a second actuator end;
- and
- a fluid signal being directed to said first actuator end to move said wiper rams toward said closed position and said fluid signal being directed to said second actuator end to move said wiper rams to said open position.
Dependencies are inferred from the claim text.