Abstract

The measurement apparatus (50) comprises at least one hybrid elastic cable (52) wound around the deformable object (22), and a measurement unit (54) capable of measuring the inductance of a wire of the hybrid elastic cable (52) comprising a conductive material between two reference points (58).

IPC Classes  ?

• A61B 5/107 - Measuring physical dimensions, e.g. size of the entire body or parts thereof
• G01B 7/28 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures

Abstract

The measurement apparatus (50) comprises at least one elastic hybrid cable (52) wound around the deformable object (22), and a measurement unit (54) capable of measuring the inductance of a wire of the elastic hybrid cable (52) comprising a conductive material between two reference points (58).

IPC Classes  ?

• G01B 7/12 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
• G01B 7/24 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
• A61B 5/107 - Measuring physical dimensions, e.g. size of the entire body or parts thereof
• E21B 33/127 - PackersPlugs with inflatable sleeve
• D02G 3/32 - Elastic yarns or threads
• G01L 9/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
• A61B 5/113 - Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb occurring during breathing

Abstract

The invention relates to a method for drilling into the ground, which includes the following step: digging a longitudinal hole (6) in the ground (8), simultaneously lining the hole (6) using a tube (14) extending substantially over an entire longitudinal length of the hole (6). The tube includes an inner tube (16) and an outer tubular sheath (18) inserted between the inner tube (16) and a wall of the hole (6), the method including, after the step of digging the hole (6), a raising step during which the inner tube (16) is removed from the hole (6), the outer sheath (18) remaining in place inside the hole (6).

IPC Classes  ?

• E21B 7/20 - Driving or forcing casings or pipes into boreholes, e.g. sinkingSimultaneously drilling and casing boreholes

Abstract

a tubular sheath (19) slid around the casing (17), the tubular sheath (19) having a central segment (27) and first and second longitudinal ends (23, 25) situated on either side of the central segment (27), the first and/or second ends (23, 25) of the tubular sheath (19) being fixed to the mandrel (15), the tubular sheath (19) being extensible from a rest state to an expanded state. the first and/or second ends (23, 25) of the tubular sheath (19) have a longitudinal elongation capacity from the rest state of the tubular sheath (19) comprised between 1.05 and 2.5, chosen to limit the diametric expansion of the first and/or second ends (23, 25) of the tubular sheath and give the first and/or second ends their shape (23, 25).

IPC Classes  ?

• E21B 33/127 - PackersPlugs with inflatable sleeve

Abstract

The invention relates to an inflatable sleeve (13) including: a mandrel (15) extending in a longitudinal direction; an inflatable casing (17) placed around the mandrel (15); and a tubular sheath (19) slid onto the casing (17). The tubular sheath (19) has a central section (27) and first and second longitudinal ends (23, 25) that are located on either side of the central section (27), the first and/or second ends (23, 25) of the tubular sheath (19) being attached to the mandrel (15), and the tubular sheath (19) being extendable from a rest state to an expanded state. The tubular sheath (19) has a predetermined capacity for circumferential elongation from the rest state of the tubular sheath (19); and the first and/or second ends (23, 25) of the tubular sheath (19) have a capacity for longitudinally elongating by between 105% and 250% from the rest state of the tubular sheath (19), said capacity being selected such as to limit the diametric expansion of the first and/or second ends (23, 25) of the tubular sheath (19) and give the shape thereof to said first and/or second ends (23, 25).

IPC Classes  ?

• E21B 33/127 - PackersPlugs with inflatable sleeve

Abstract

sE, and the distinct turns about itself of the elastic filament yarn (1) is wound in the opposite direction from that of the said helix.

IPC Classes  ?

• D02G 3/02 - Yarns or threads characterised by the material or by the materials from which they are made
• D02G 3/32 - Elastic yarns or threads

Abstract

Hybrid elastic cable comprising at least one elastic wire (1) and at least one resistant wire (2), the elastic wire (1), at a maximum degree of elongation of the cable, encircles the resistant wire (2) in a helix with a specific number of turns per linear metre of the cable, this number of turns ranging between nsE -15% and nsE +15%, nsE being determined from the following formula: formula (I), in which φe is the diameter in mm of the elastic wire (1) at rest, φK is the diameter in mm of the resistant wire (2) and Kmax is the preset maximum degree of elongation of the hybrid cable, the elastic wire (1) furthermore being twisted over itself with a specific number of distinct turns per linear metre of the cable, this number of distinct turns ranging between nsE and 3×nsE, the distinct turns in the wire (1) of the first type being wound in the opposite direction to the turns of said helix.

IPC Classes  ?

• D02G 3/32 - Elastic yarns or threads