초록 ▼

There are disclosed several embodiments of an inflatable tool of the type comprising a mandrel adapted to be raised and lowered within a well bore and an inflatable element including a sleeve of elastomeric material surrounding a tubular section of the mandrel and anchored at its ends to upper and l

There are disclosed several embodiments of an inflatable tool of the type comprising a mandrel adapted to be raised and lowered within a well bore and an inflatable element including a sleeve of elastomeric material surrounding a tubular section of the mandrel and anchored at its ends to upper and lower heads which are disposed about the tubular section and relatively movable longitudinally toward and away from one another, upon inflation of the sleeve, as well as substantially flat reinforcing strips of sheet metal or other relatively rigid but flexible material which are arranged about the sleeve with their side edges in overlapping relation and with their ends anchored to the heads so that the strips flex outwardly with the sleeve to cause the inflatable element to engage a wall of the well bore.

대표청구항 ▼

An inflatable tool, comprising a mandrel adapted to be arranged concentrically with respect to a cylindrical wall and including a tubular section having upper and lower heads thereabout which are longitudinally movable relatively toward and away from one another, and an inflatable element adapted to

An inflatable tool, comprising a mandrel adapted to be arranged concentrically with respect to a cylindrical wall and including a tubular section having upper and lower heads thereabout which are longitudinally movable relatively toward and away from one another, and an inflatable element adapted to be moved into engagement with the wall, said inflatable element including a sleeve of elastomeric material arranged concentrically of the tubular section of the mandrel and anchored at each longitudinal end to the heads, substantially flat, relatively rigid but flexible strips arranged concentrically of the side of the sleeve opposite the tubular section and with their sides in overlapping relation, means anchoring the longitudinal ends of the strips to the heads while leaving their intermediate portions free to move radially toward the wall in response to inflation of the sleeve, said anchoring means comprising means in each head having radially inner and outer walls confining the radially inner and outer side edges of the strips and a shoulder about one wall which faces away from the shoulder about one wall of the other head, a portion which extends from each end of each strip to dispose its longitudinally inner end edge over the shoulder, said portion being inclined at an acute angle with respect to the longitudinal and extending in a direction from one side edge toward its other side edge, and spacers between the portions of adjacent strips. A packer, comprising a mandrel adapted to be arranged concentrically with respect to a cylindrical wall and including a tubular section having upper and lower heads thereabout which are longitudinally movable relatively toward and away from one another, and an inflatable element adapted to be moved into engagement with the wall of the well bore, said inflatable element including a sleeve of elastomeric material arranged concentrically of the tubular section and anchored at each longitudinal end to the heads, substantially flat, relatively rigid but flexible strips arranged concentrically of the side of the sleeve opposite the tubular section and with their sides in overlapping relation, and means anchoring the longitudinal ends of the strips to the heads while leaving their longitudinally intermediate portions free to move radially toward the wall in response to inflation of the sleeve, and another sleeve of elastomeric material arranged concentrically of the sides of at least a portion of the strips opposite the first mentioned sleeve and longitudinally intermediate the heads for sealably engaging the cylindrical wall when forced radially thereagainst, portions of at least certain of the strips which are not covered by the other sleeve having tabs struck therefrom for biting engagement with the cylindrical wall so as to anchor the packer with respect thereto.