Apparatus and method for stripping solids and fluids from a string used in drilling or servicing wells
First Claim
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1. A seal for placement within a supporting body, the supporting body defining a generally cylindrical passage for receiving a pipe, the seal comprising:
- three or more sealing members arranged circumferentially around the generally cylindrical passage and circumferentially overlapping within the supporting body, the three or more sealing members defining an opening to receive the pipe, the opening being aligned with the generally cylindrical passage, the three or more sealing members forming an annular seal around the pipe when the pipe is in the opening, in which the sealing members form a conical shape when unstressed, and are formed of an elastomeric material that flexes on passage of a tool joint or pipe through the supporting body, and the supporting body is disposed around a well string with the conical shape narrowing upward.
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Abstract
Three or more overlapping sealing members arranged circumferentially around a passage in a supporting body form an annular seal around a pipe inserted into the passage.
84 Citations
9 Claims
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1. A seal for placement within a supporting body, the supporting body defining a generally cylindrical passage for receiving a pipe, the seal comprising:
three or more sealing members arranged circumferentially around the generally cylindrical passage and circumferentially overlapping within the supporting body, the three or more sealing members defining an opening to receive the pipe, the opening being aligned with the generally cylindrical passage, the three or more sealing members forming an annular seal around the pipe when the pipe is in the opening, in which the sealing members form a conical shape when unstressed, and are formed of an elastomeric material that flexes on passage of a tool joint or pipe through the supporting body, and the supporting body is disposed around a well string with the conical shape narrowing upward. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification