Adjustable gauge downhole drilling assembly
First Claim
1. A downhole drilling assembly for connection with a drill string, comprising the following:
- (a) a drive assembly for driving a drilling bit without rotating the drill string, the drive assembly extending between a power unit and a lower end of the drilling assembly;
(b) an adjustable gauge stabilizer located between the power unit and the lower end of the drilling assembly such that the drive assembly extends therethrough, wherein the adjustable gauge stabilizer is comprised of a radially movable stabilizer; and
(c) an axially movable mandrel positioned about the drive assembly and associated with the stabilizer for causing radial movement of the stabilizer in response to axial movement of the mandrel.
3 Assignments
0 Petitions
Accused Products
Abstract
A downhole drilling assembly including a housing having an upper end for connection to a drill string and a lower end, a fluid passage extending through the housing from the upper end to the lower end, a power unit contained within the housing, a drive assembly extending within the housing between the power unit and the lower end of the housing such that a mandrel chamber is defined between the drive assembly and the housing, a radially movable first stabilizer associated with the housing and located between the power unit and the lower end of the housing, an axially movable mandrel contained within the mandrel chamber, the mandrel being associated with a stabilizer actuator for causing radial movement of the first stabilizer in response to axial movement of the mandrel, and a sensor apparatus located between the power unit and the lower end of the housing for sensing at least one drilling parameter. The drilling assembly may also include a second stabilizer located between the power unit and the lower end of the housing and a bent housing assembly located between the power unit and the lower end of the housing.
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Citations
39 Claims
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1. A downhole drilling assembly for connection with a drill string, comprising the following:
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(a) a drive assembly for driving a drilling bit without rotating the drill string, the drive assembly extending between a power unit and a lower end of the drilling assembly;
(b) an adjustable gauge stabilizer located between the power unit and the lower end of the drilling assembly such that the drive assembly extends therethrough, wherein the adjustable gauge stabilizer is comprised of a radially movable stabilizer; and
(c) an axially movable mandrel positioned about the drive assembly and associated with the stabilizer for causing radial movement of the stabilizer in response to axial movement of the mandrel.
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2. A downhole drilling assembly comprising the following:
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(a) a housing having an upper end for connection to a drill string and lower end;
(b) a fluid passage extending through the housing from the upper end to the lower end;
(c) a power unit contained within the housing;
(d) a drive assembly extending within the housing between the power unit and the lower end of the housing such that a mandrel chamber is defined between the drive assembly and the housing;
(e) a radially movable first stabilizer associated with the housing and located between the power unit and the lower end of the housing;
(f) an axially movable mandrel contained within the mandrel chamber, the mandrel being associated with a stabilizer actuator for causing radial movement of the first stabilizer in response to axial movement of the mandrel; and
(g) a sensor apparatus located between the power unit and the lower end of the housing for sensing at least one drilling parameter. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification