Axial, Lateral and Torsional Force Dampener
First Claim
1. A downhole tool for dampening compressive and tensile forces within a drillstring comprising:
- a bottom end shaft configurable to a drillstring, the bottom end shaft telescopically engaged within a compression housing and a torsional housing;
the torsional housing having at least one longitudinal slot operatively containing at least one pin for sliding engagement within a corresponding longitudinal slot and engagement within a recess on the bottom end shaft, wherein engagement of the at least one pin within the corresponding longitudinal slot allows axial movement of the bottom end shaft relative to the torsional housing and prevents rotational movement of the bottom end shaft relative to the torsional housing;
the compression housing configurable to drillstring equipment, the compression housing operatively containing a first spring between the compression housing and the bottom end shaft, the first spring for absorbing compression forces between the bottom end shaft and the compression housing.
1 Assignment
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Accused Products
Abstract
A downhole tool for dampening vibrational, lateral, compressive, and tensile forces within a drillstring is described. The downhole tool generally includes a bottom end shaft configurable to a drillstring and that is telescopically engaged within a compression housing and a torsional housing. The torsional housing enables the bottom end shaft to slide axially with respect to the torsional housing whilst preventing torsional movement of the bottom end shaft relative to the torsional housing. The compression housing is configurable to drillstring equipment and operatively contains a first spring between the compression housing and the bottom end shaft that absorbs compression forces between bottom end shaft and compression housing.
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Citations
24 Claims
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1. A downhole tool for dampening compressive and tensile forces within a drillstring comprising:
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a bottom end shaft configurable to a drillstring, the bottom end shaft telescopically engaged within a compression housing and a torsional housing; the torsional housing having at least one longitudinal slot operatively containing at least one pin for sliding engagement within a corresponding longitudinal slot and engagement within a recess on the bottom end shaft, wherein engagement of the at least one pin within the corresponding longitudinal slot allows axial movement of the bottom end shaft relative to the torsional housing and prevents rotational movement of the bottom end shaft relative to the torsional housing; the compression housing configurable to drillstring equipment, the compression housing operatively containing a first spring between the compression housing and the bottom end shaft, the first spring for absorbing compression forces between the bottom end shaft and the compression housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A downhole tool for dampening compressive and tensile forces within a drillstring comprising:
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a bottom end shaft configurable to a drillstring, the bottom end shaft telescopically engaged within a compression housing and a torsional housing; a first seal operatively connected between the torsional housing and bottom end shaft; a second seal operatively connected between the compression housing and bottom end shaft; the torsional housing having at least one longitudinal slot operatively containing at least one pin for sliding engagement within a corresponding longitudinal slot and engagement within a recess on the bottom end shaft, wherein engagement of the at least one pin within the corresponding longitudinal slot allows axial movement of the bottom end shaft relative to the torsional housing and prevents rotational movement of the bottom end shaft relative to the torsional housing;
wherein the torsional housing includes a rubber insert configured to inner surfaces of the torsional housing and wherein the at least one pin engages with the rubber insert;the compression housing configurable to drillstring equipment, the compression housing operatively containing; a first spring contained within a first hydraulic chamber containing hydraulic fluid between the compression housing and the bottom end shaft, the first spring for absorbing compression forces between the bottom end shaft and the compression housing; and a second spring contained within a second hydraulic chamber containing hydraulic fluid between the compression housing and the bottom end shaft, the second spring for absorbing tension forces between the bottom end shaft and the compression housing; wherein when under no compressive or tensile forces the first and second springs return the bottom end shaft to a balanced position. - View Dependent Claims (22)
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23. A downhole tool for dampening compressive and tensile forces within a drillstring comprising:
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a bottom end shaft configurable to a drillstring, the bottom end shaft telescopically engaged within a compression housing and a torsional housing; a first seal operatively connected between the torsional housing and bottom end shaft; a second seal operatively connected between the compression housing and bottom end shaft; the torsional housing comprising an outer torsion housing and an inner torsion cartridge have mating splines and recesses enabling helical and axial movement of the inner torsion cartridge relative to the outer torsion housing when the inner torsion cartridge is subjected to a torsional force relative to the outer torsion housing;
the inner torsion cartridge comprising;at least one longitudinal slot operatively containing at least one pin for sliding engagement within a corresponding longitudinal slot and engagement within a recess on the bottom end shaft, wherein engagement of the at least one pin within the corresponding longitudinal slot allows axial movement of the bottom end shaft relative to the torsional housing and prevents rotational movement of the bottom end shaft relative to the torsional housing; and a disk spring seated against downhole and uphole surfaces of the inner torsion cartridge for absorbing axial uphole and downhole forces when the inner torsion cartridge moves relative to the outer torsion housing; and wherein the compression housing is configurable to drillstring equipment, the compression housing operatively containing; a first spring contained within a first hydraulic chamber containing hydraulic fluid between the compression housing and the bottom end shaft, the first spring for absorbing compression forces between the bottom end shaft and the compression housing; and a second spring contained within a second hydraulic chamber containing hydraulic fluid between the compression housing and the bottom end shaft, the second spring for absorbing tension forces between the bottom end shaft and the compression housing; wherein when under no compressive or tensile forces the first and second springs return the bottom end shaft to a balanced position. - View Dependent Claims (24)
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Specification