Improvements in or relating to downhole measurements
AssigneeRead Cased Hole Limited
InventorsMark Waddington, Maurillio Addario
Life of this patent
Estimating the term…
Abstract
A caliper finger for use as part of a multi-finger caliper logging tool has a body formed substantially of a first material and a finger tip formed substantially of a second material which has greater mechanical durability than the first material. The first material and second material are fused directly together at a joint between the first material and the second material. The finger tip may comprise a plurality of successively-fused layers of the second material, which can then be machined at its outer surface after fusion of the plurality of layers. The second material may be a composite material of tungsten carbide combined with a base material in which the tungsten carbide is embedded and securely bonded to the finger.
Claims23
A caliper finger for a multi-finger caliper logging tool, the caliper finger having a body comprising a first material and a finger tip comprising a second material, the caliper finger having a joint between the first material and the second material, wherein the second material has greater mechanical durability than the first material;
- wherein at the joint the first material and second material are fused directly together;
- wherein the finger tip comprises a plurality of successively fused layers of the second material;
- and wherein the finger tip comprises a machined outer surface.
A method of manufacturing a caliper finger for a multi-finger caliper logging tool, the method comprising the steps:
- providing a caliper finger formed of a first material;
- successively fusing a plurality of layers of a second material to an end of the caliper finger;
- and
- machining at least the second material to create a tip of the caliper finger from the second material.
(canceled)
A caliper finger for a multi-finger caliper logging tool, the caliper finger having a body formed of a first material and a finger tip formed of a second material, the caliper finger having a joint between the first material and the second material, wherein the second material has greater mechanical durability than the first material;
- wherein at the joint the first material and second material are fused directly together;
- wherein the finger tip comprises a plurality of fused layers of the second material;
- wherein the finger tip comprises a machined outer surface;
- wherein the second material comprises a composite material of tungsten carbide and a base material wherein the base material of the second material is fused directly with the first material in the joint and wherein the tungsten carbide is not fused with the first material at the joint.
Dependencies are inferred from the claim text.