Patent US3993368A successfully refreshed from Google Patents.
US3993368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool joint wear protectors
Assignee: Norton Christensen Inc
•
Filing: 1975-07-21
•
Granted: 1976-11-23
•
Expires: 1995-07-21
Abstract
Abstract A tool joint for well drilling pipe includes a body having a wear protector including a split ring disposed in an annular groove in the tool joint body, the ring segments being welded together and to the groove portion of the body. Hardmetal elements secured in the outer periphery of the ring are irregularly distributed, with the distribution or density of the hardmetal elements being greatest adjacent to the end of the tool joint body and progressively less inwardly from the end of the tool joint body.
Inventors
- 👤 Rainer Jurgens
- 👤 Gerhard Exner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1085; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/24; F16L; F16L57/00
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
85 words
In a well pipe tool joint part comprising an elongated body having thread means at one end of the body for connection with a complemental tool joint part, and wear protector means extending circumferentially about said body in an axially extended region spaced from the end of said one body: the improvement wherein said wear protector means comprises hardfacing material distributed about said region more densely closest to said one end of said body and progressively less densely towards the other end of said body.
Claim 2
Dependent Claim
85 words
In a well pipe tool joint part comprising an elongated body having thread means at one end of the body for connection with a complemental tool joint part, and wear protector means extending circumferentially about said body in an axially extended region spaced from the end of said one body: the improvement wherein said wear protector means comprises hardfacing material distributed about said region more densely closest to said one end of said body and progressively less densely towards the other end of said body.
Claim 3
Dependent Claim
29 words
In a well pipe tool joint part as defined in claim 1, said hardfacing material being in the form of slugs arranged in circumferentially spaced rows of diminishing number.
Claim 4
Dependent Claim
40 words
In a well pipe tool joint part as defined in claim 1, said hardfacing material being in the form of slugs arranged in triangular plots with the apex of each triangle pointing away from said one end of said body.
Claim 5
Dependent Claim
59 words
In a well pipe tool joint part as defined in clam 1, said hardfacing material being in the form of elongated elements extending axially of the body and arranged in plots forming rows of elements about said body in which the elements in each plot diminish in number from the row closest to said one end of said body.
Claim 6
Dependent Claim
59 words
In a well pipe tool joint part as defined in clam 1, said hardfacing material being in the form of elongated elements extending axially of the body and arranged in plots forming rows of elements about said body in which the elements in each plot diminish in number from the row closest to said one end of said body.
Claim 7
Dependent Claim
24 words
In a well pipe tool joint part as defined in claim 4, said rows of elements slightly overlapping each other axially of said body.
Claim 8
Dependent Claim
27 words
In a well pipe tool joint part as defined in claim 4, the elements of each plot being uniformly circumferentially spaced in each row about said body.
Claim 9
Dependent Claim
33 words
In a well pipe tool joint part as defined in claim 4, the elements of adjacent plots being axially displaced with respect to the elements of adjacent plots in some of said rows.
Claim 10
Dependent Claim
25 words
In a well pipe tool joint part as defined in claim 4, the adjacent plots of elements being axially displaced with respect to one another.
Claim 11
Dependent Claim
24 words
In a well pipe tool joint part as defined in claim 4, said elements being skewed with respect to the axis of the body.
Claim 12
Dependent Claim
38 words
In a well pipe tool joint part as defined in claim 4, said elements being skewed with respect to the axis of the body and the plots of skewed elements being axially displaced with respect to one another.
Claim 13
Dependent Claim
42 words
In a well pipe tool joint part as defined in claim 1, supporting ring means for said hardfacing material, said body having an annular groove, said ring means being disposed in said groove, and means retaining said ring means in said groove.
Claim 14
Dependent Claim
35 words
In a well pipe tool joint part as defined in claim 11, said ring means being an axially split ring comprising ring segments, and said retaining means including welds interconnecting the segments of said ring.
Claim 15
Dependent Claim
53 words
In a well pipe tool joint part as defined in claim 11, said ring means being an axially split ring comprising ring segments, and said retaining means including welds interconnecting the segments of said ring, and welds extending circumferentially between said body and said ring segments to secure said ring to said body.
Claim 16
Dependent Claim
56 words
In a well pipe tool joint part as defined in claim 11, said groove in said body being undercut and being of greater axial dimension than said ring means, and said retaining means includes a malleable ring forced into said groove at an end of said ring means to hold said ring means in said groove.
Claim 17
Dependent Claim
61 words
A wear protective ring for well pipe tool joints comprising: a pair of ring half-parts adapted to be joined together in a groove of the tool joint, each half-part having wear protector means on its outer side comprising hardfacing material distributed more densely closest to one end of said half-part and progressively less densely toward the other end of said half-part.
Claim 18
Dependent Claim
61 words
A wear protective ring for well pipe tool joints comprising: a pair of ring half-parts adapted to be joined together in a groove of the tool joint, each half-part having wear protector means on its outer side comprising hardfacing material distributed more densely closest to one end of said half-part and progressively less densely toward the other end of said half-part.
Claim 19
Dependent Claim
50 words
A wear protective ring as defined in claim 15, said hardfacing material being in the form of slugs arranged in circumferentially spaced rows axially of said half-parts, the slugs in each row diminishing in number from one end portion of the half-parts toward the other end portion of the half-parts.
Claim 20
Dependent Claim
53 words
A wear protective ring as defined in claim 15, said hardfacing material being in the form of elongated elements extending axially of the body and arranged in plots forming rows of elements about each of said half-parts of diminishing numbers of elements from the row closest to said one end of said half-part.
Claim 21
Dependent Claim
30 words
A wear protective ring as defined in claim 17, the elements of adjacent plots being axially displaced with respect to the elements of adjacent plots in some of said rows.
Claim 22
Dependent Claim
22 words
A wear protective ring as defined in claim 17, the adjacent plots of elements being axially displaced with respect to one another.
Claim 23
Dependent Claim
21 words
A wear protective ring as defined in claim 17, the elements being skewed with respect to the axis of said half-part.
Claim 24
Dependent Claim
64 words
A wear protective ring for well pipe tool joints comprising: a plurality of ring parts adapted to be joined together in a groove of the tool joint, each ring part having wear protector means on its outer side comprising hardfacing material distributed more densely closest to one end of said ring part and progressively less densely toward the other end of said ring part.
Claim 25
Dependent Claim
64 words
A wear protective ring for well pipe tool joints comprising: a plurality of ring parts adapted to be joined together in a groove of the tool joint, each ring part having wear protector means on its outer side comprising hardfacing material distributed more densely closest to one end of said ring part and progressively less densely toward the other end of said ring part.
Claim 26
Dependent Claim
53 words
A wear protective ring as defined in claim 21, said hardfacing material being in the form of slugs arranged in circumferentially spaced rows axially of said ring parts, the slugs in each row diminishing in number from one end portion of the ring parts toward the other end portion of the ring parts.
Claim 27
Dependent Claim
55 words
A wear protective ring as defined in claim 21, said hardfacing material being in the from of elongated elements extending axially of the body and arranged in plots forming rows of elements about each of said ring parts of diminishing numbers of elements from the row closest to said one end of said ring part.
Claim 28
Dependent Claim
30 words
A wear protective ring as defined in claim 23, the elements of adjacent plots being axially displaced with respect to the elements of adjacent plots in some of said rows.
Claim 29
Dependent Claim
22 words
A wear protective ring as defined in claim 23, the adjacent plots of elements being axially displaced with respect to one another.
Claim 30
Dependent Claim
22 words
A wear protective ring as defined in claim 23, the elements being skewed with respect to the axis of said ring part.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |