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US 10,767,424 B2Granted
Device arranged for attaching a pipe stem on a tubular body
AssigneeAce Oil Tools AS
InventorKen Erik Steine
Life of this patent
Estimating the term…
Abstract
An attachment device for an element is made to be arranged on a downhole tubular body, in which an end portion of a sleeve, which is arranged to surround a portion of the tubular body, comprises an attachment portion. The attachment portion comprises at least one clamping element arranged for axial displacement by the abutment of an abutment surface against a conical abutment portion of a surrounding adapter sleeve.
Claims28
A device for attachment to a tubular body comprising:
- a first sleeve including an end portion, the sleeve configured to surround the tubular body, the end portion comprising a plurality of axial extensions separated by a plurality of slits, the extensions including a locking portion and a gripping portion;
- and
- a second sleeve configured to encircle the end portion of the first sleeve, the second sleeve including a conical abutment portion and a corresponding locking portion configured to engage with the locking portion of the first sleeve;
- wherein the gripping portion of the extensions comprises a radially inward facing clamping surface including radially inwardly gripping projections, as well as a radially outward facing abutment surface opposite the clamping surface the extensions further comprise a radially outward facing abutment surface, the locking portion of the first sleeve comprises a plurality of circumferential annular catches located on the external surface of the first sleeve;
- and the locking portion of the second sleeve comprises a plurality of complimentary circumferential annular catches located on the internal surface of the second sleeve;
- and
- wherein the end portion of the first sleeve and the second sleeve are configured such that when the end portion of the first sleeve is axially brought together with the second sleeve so that the locking portion of the extensions of the first sleeve are engaged with the locking portion of the second sleeve, the conical abutment portion of the second sleeve displaces the abutment surface of the gripping surface.
4 more elements
An attachment assembly for a tubular body comprising:
- a sleeve having a tubular attachment portion, the attachment portion comprising a plurality of clamping elements extending in an axial direction towards a distal end of the attachment portion and arranged for radial displacement toward an encircled tubular body, the clamping elements formed by parallel, axial slits, the plurality of clamping elements comprising a gripping face on an inner surface of the clamping elements, the gripping face comprising teeth, the plurality of clamping elements further comprising at least one circumferential annular catch on an outer surface of the clamping element, the circumferential annular catch comprising a sloped first side face facing the distal end of the clamping element and an opposite second side face forming an abutment surface approximately perpendicular to a center axis of the sleeve;
- and
- an adapter sleeve arranged to inwardly, radially displace the clamping elements, the adapter sleeve comprising an engagement element projecting inwards having a complementary cross section to a cross section of the circumferential annular catch,
- wherein the attachment assembly is arranged such that when the adapter sleeve is moved in over the attachment portion, the adapter sleeve displaces the clamping elements inwards and the engagement element slides over the sloped first side face until the engagement element engages behind the catch by axially supporting abutment against the abutment surface of the catch.
1 more element
An assembly for tubular body comprising:
- a centralizer deployed on the tubular body;
- and
- an attachment device deployed and fixed on the tubular body, the attachment device adjacent to the centralizer, the attachment device comprising;
- a sleeve having a tubular attachment portion, the attachment portion comprising a plurality of clamping elements extending in an axial direction towards a distal end of the attachment portion and encircling tubular body, the clamping elements formed by slits penetrating the attachment portion, the plurality of clamping elements comprising a gripping face on an inner surface of the clamping elements, the gripping face comprising a plurality of axially spaced circumferential teeth at least partially embedded into the surface of the tubular body, the plurality of clamping elements further comprising at least one circumferential annular catch on an outer surface of the clamping element, the circumferential annular catch comprising a sloped first side face facing the distal end of the clamping element and an opposite second side face forming an abutment surface approximately perpendicular to a center axis of the sleeve;
- and
- an adapter sleeve that encircles and engages with the tubular attachment portion, providing inward radial force upon the clamping elements, the adapter sleeve comprising an engagement element projecting inwards having a complementary cross section to a cross section of the circumferential annular catch.
3 more elements
Dependencies are inferred from the claim text.