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US 8,783,344 B2Granted
Integral wear pad and method
OwnerThein Htun Aung, Raul G. Garza +2inventors
InventorsThein Htun Aung, Raul G. Garza, Andrew J. Allen, R. Thomas Moore
Life of this patent
Estimating the term…
Abstract
The current invention provides a drill pipe of standard weight with an integral wear pad. The drill pipe with integral wear pad provides increased durability while retaining the strength, flexibility, lightweight, and other performance characteristics of standard weight drill pipe. The current invention also provides methods for making a standard weight drill pipe with integral wear pad.
Claims81
A wear resistant drill pipe for use in the down-hole environment comprising:
- a standard weight drill pipe body having at least one integral wear pad, wherein the wear pad comprises a redistributed portion of a substrate material of the standard weight drill pipe body.
A wear resistant drill pipe for use in the down-hole environment comprising:
- a standard weight drill pipe body having at least one integral wear pad, wherein the wear pad has an external diameter at least about 0.5 inches greater than an external diameter of the standard weight drill pipe body;
- and
- wherein the wear pad comprises a redistributed portion of a substrate material of the standard weight drill pipe body.
A wear resistant drill pipe for use in the down-hole environment comprising:
- a standard weight drill pipe body having at least one integral wear pad, wherein the wear pad has an external diameter of at least about 0.5 inches greater than an external diameter of the standard weight drill pipe body, and wherein the wear pad has mechanical properties substantially identical to the mechanical properties of the standard weight drill pipe body;
- and
- wherein the wear pad comprises a redistributed portion of a substrate material of the standard weight drill pipe body.
A method of manufacturing wear resistant drill pipe for use in the down-hole environment comprising:
- upsetting an end of a first standard weight drill pipe, the first standard weight drill pipe having an external diameter, thereby providing a first upset comprising a redistributed portion of a substrate material of the first standard weight drill pipe, the first upset having an external diameter greater than the external diameter of the first standard weight drill pipe;
- upsetting an end of a second standard weight drill pipe, the second standard weight drill pipe having an external diameter, thereby providing a second upset comprising a redistributed portion of a substrate material of the second standard weight drill pipe, the second upset having an external diameter greater than the external diameter of the second standard weight drill pipe, wherein the external diameter of the second upset is substantially equal to the external diameter of the first upset;
- and
- joining the first upset to the second upset, wherein the first standard weight drill pipe remains substantially concentric to the second standard weight drill pipe, thereby forming an integral wear pad on the resulting wear resistant drill pipe, the wear pad having an external diameter substantially equal to external diameters of the first and second upsets.
1 more element
A method of manufacturing wear resistant drill pipe for use in the down-hole environment comprising:
- upsetting an end of a first standard weight drill pipe, the first standard weight drill pipe having an external diameter, thereby providing a first upset comprising a redistributed portion of a substrate material of the first standard weight drill pipe, the first upset having an external diameter greater than the external diameter of the first standard weight drill pipe;
- upsetting an end of a second standard weight drill pipe, the second standard weight drill pipe having an external diameter, thereby providing a second upset comprising a redistributed portion of a substrate material of the second standard weight drill pipe, the second upset having an external diameter greater than the external diameter of the second standard weight drill pipe, wherein the external diameter of the second upset is substantially equal to the external diameter of the first upset;
- providing a third tubular member having first and second ends, the third tubular member having an external diameter substantially equal to the external diameters of the first and second upsets;
- joining the first upset to the first end of the third tubular member, wherein the first standard weight drill pipe remains substantially concentric with the third tubular member;
- and
- joining the second upset to the second end of the third tubular member, wherein the second standard weight drill pipe remains substantially concentric with the third tubular member and the first standard weight drill pipe, the joining of the first and second upsets to the third tubular member thereby defining an integral wear pad having an external diameter substantially equal to the external diameters of the first and second upsets.
3 more elements
A method manufacturing wear resistant drill pipe for use in the down-hole environment comprising:
- upsetting an end of a first standard weight drill pipe body, the first standard weight drill pipe having external diameter, thereby a first upset comprising a redistributed portion of a substrate material of the first standard weight drill pipe, the first upset having an external diameter greater than the external diameter of the first standard weight drill pipe;
- upsetting an end of a second standard weight drill pipe body, the second standard weight drill pipe having an external diameter, thereby providing a second upset comprising a redistributed portion of a substrate material of the second standard weight drill pipe, the second upset having an external diameter greater than the external diameter of the second standard weight drill pipe;
- concentrically connecting the first upset to a tool joint pin and the second upset to a tool joint box;
- threadedly connecting the tool joint pin to the tool joint box, the connection of the tool joint pin to the tool joint box thereby forming a wear pad;
- and
- permanently securing the connection of the tool joint pin to the tool joint box.
3 more elements
A method of manufacturing wear resistant drill pipe for use in the down-hole environment comprising:
- upsetting an end of a first standard weight drill pipe having a first external diameter, thereby providing a first upset having a second external diameter, the second external diameter comprising a redistributed portion of a substrate material of the first standard weight drill pipe, the first upset;
- upsetting an end of second standard weight drill pipe having a first external diameter, thereby providing a second upset having a second external diameter, the second external diameter comprising a redistributed portion of a substrate material of the first standard weight drill pipe, the first upset, wherein the second external diameter of the second upset is substantially the same as the second external diameter of the first upset;
- providing a third tubular member comprising a wear pad having a third external diameter, a first end having a fourth external diameter, and a second end having a fourth external diameter, wherein the fourth external diameters of the first and second ends of the third tubular member are substantially equal to one another and substantially equal to the second external diameters of the first and second upsets, and wherein the third external diameter of the wear pad is greater than the first external diameters of the first and second standard weight drill pipes and the second external diameters of the first and second upsets, and wherein the wear pad is located between the first and second ends of the third tubular member;
- joining the first upset to the first end of the third tubular member, wherein the first standard weight drill pipe remains substantially concentric with the third tubular member;
- and
- joining the second upset to the second end of the third tubular member, wherein the second standard weight drill pipe remains substantially concentric with the third tubular member and the first standard weight drill pipe.
3 more elements
A wear resistant drill pipe for use in the down-hole environment comprising:
- a standard weight drill pipe body having at least one integral wear pad, wherein the wear pad has an external diameter at least about 0.5 inches greater than an external diameter of the standard weight drill pipe body;
- and
- at least a pair of tapers providing a transition from the external diameter of the standard weight drill pipe body to the external diameter of the wear pad wherein each taper has a metallurgical grain structure parallel with an angular slope thereof.
A wear resistant drill pipe for use in the down-hole environment comprising:
- a standard weight drill pipe body having at least one integral wear pad, wherein the wear pad has an external diameter at least about 0.5 inches greater than an external diameter of the standard weight drill pipe body, and wherein the wear pad has mechanical properties substantially identical to the mechanical properties of the standard weight drill pipe body;
- and
- at least a pair of tapers providing a transition from the external diameter of the standard weight drill pipe body to the external diameter of the wear pad wherein each taper has a metallurgical grain structure parallel with an angular slope thereof.
Dependencies are inferred from the claim text.