# US 2021/0277722 A1 · Multiple ridge diamond compact for drill bit and drill bit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277722 A1 - Document ID: US20210277722A1 - Status: Published application - Kind: A1 - Application number: 17/259,383 - Filed: 2019-07-10 - Published: 2021-09-09 - Earliest claimed: 2018-07-13 - Assignees: Kingdream Public Limited Company - Applicants: Kingdream Public Limited Company - Inventors: Qiang LIU; Guanfu TU; Hong XU - Web page: https://patentgrep.com/patent/US20210277722A1 ## CPC - E21B 10/5673: {having a non planar or non circular cutting face} - E21B 10/5676: {having a cutting face with different segments, e.g. mosaic-type inserts} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract The disclosure relates to a multiple ridge diamond compact for a drill bit, comprising a hard alloy substrate (cemented carbide substrate) (102) and a diamond composite layer (101), wherein an end surface of the diamond composite layer is provided with at least two ridges angled relative to each other, and converging ends of two adjacent ridges extend to an edge of the diamond composite layer (101) so as to form a concave cutting edge portion on the edge. The plurality of ridges angled relative to each other are set as a cutting surface group to simultaneously cut a formation, the formation is first pre-crushed by means of the ridges angled relative to each other, the ridges first enter the formation from sharp surfaces (the converging ends of the ridges), a crushing pit in the direction of the ridges is further enlarged, and then the formation is further extruded and crushed by inclined surfaces on two sides of the group of ridges, such that the cutting surfaces thereof have a plowing effect, thus improving the crushing and drilling performance of the diamond compact, reducing the drilling cutting resistance, and further increasing the mechanical drilling speed (rate of penetration) of the diamond drill bit. ## Claims ### Claim 1 A multiple ridge diamond compact for a drill bit, comprising a cemented carbide substrate (102) and a diamond composite layer (101), wherein the end surface of the diamond composite layer is provided with at least two ridges angled relative to each other, and converging ends of two adjacent ridges extend to the edge of the diamond composite layer (101) to form a concave cutting edge portion on the edge. ### Claim 2 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the edge of the diamond composite layer (101) is chamfered, so that a tapered surface is formed at the circumferential edge of the diamond composite layer (101), and the tapered surface and the converging ends of the two adjacent ridges constitute the cutting edge portion. ### Claim 3 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the ridges extend radially. ### Claim 4 (depends on 3) The multiple ridge diamond compact for a drill bit according to claim 3, wherein there are at least three ridges, and one of the ridges is arranged along the radial direction of the diamond composite layer (101). ### Claim 5 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the ridges constitute a polygon. ### Claim 6 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein there are at least two groups of ridges, each group of ridges is composed of at least two ridges angled relative to each other, and adjacent expanding ends of adjacent groups of ridges intersect in pairs within the end surface of the diamond composite layer. ### Claim 7 (depends on 6) The multiple ridge diamond compact for a drill bit according to claim 6, wherein the groups of ridges are evenly arranged along the circumference of the diamond composite layer, and the intersection of the expanding ends of the ridges of the adjacent groups is located on the middle area of the end surface of the diamond composite layer. ### Claim 8 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein each ridge is formed by the intersection of two inclined surfaces, and a groove are disposed between adjacent inclined surfaces which are located between two adjacent ridges. ### Claim 9 (depends on 3) The multiple ridge diamond compact for a drill bit according to claim 3, wherein the expanding ends of the ridges are higher than the converging ends of the ridges. ### Claim 10 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein an inclined angle between the ridges and the bottom plane of the cemented carbide ranges from 0 to 20 degrees. ### Claim 11 (depends on 10) The multiple ridge diamond compact for a drill bit according to claim 10, wherein the inclined angle is 0 or 15 degrees. ### Claim 12 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the inclined angle between the two adjacent ridges ranges from 10 degrees to 90 degrees. ### Claim 13 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the shape of the ridges is one of a line, a plane, a cambered surface, and a gradual curved surface. ### Claim 14 (depends on 13) The multiple ridge diamond compact for a drill bit according to claim 13, wherein the ridges are parts of a conical surface, and the conical ridges are tapered from the expanding end toward the converging end. ### Claim 15 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the width L of the cutting edge portion is in a range of 1 mm to 4 mm. ### Claim 16 (depends on 15) The multiple ridge diamond compact for a drill bit according to claim 15, wherein the width L of the cutting edge portion is 1.5 mm or 2 mm. ### Claim 17 (depends on 1) The multiple ridge diamond compact for a drill bit according to claim 1, wherein the radial cross section of the diamond compact is circular or elliptical. ### Claim 18 (depends on 1) A drill bit, comprising the multiple ridge diamond compact for a drill bit according to claim 1.