公开(公告)号：US07044243B2

公开(公告)日：2006-05-16

申请号：US10356381

申请日：2003-01-31

Applicant: Kumar T. Kembaiyan ,  Thomas W. Oldham ,  John (Youhe) Zhang

Inventor： Kumar T. Kembaiyan ,  Thomas W. Oldham ,  John (Youhe) Zhang

IPC: E21B10/00

CPC classification number: C22C38/04 ,  C22C38/02 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  E21B10/00 ,  E21B10/42 ,  E21B10/55

Abstract: Drill bit reinforcing members or blanks of this invention are formed from high-strength steels having a carbon content less than about 0.3 percent by weight, a yield strength of at least 55,000 psi, a tensile strength of at least 80,000 psi, a toughness of at least 40 CVN-L, Ft-lb, and a rate of expansion percentage change less than about 0.0025%/° F. during austenitic to ferritic phase transformation. In one embodiment, such steel comprises in the range of from about 0.1 to 0.3 percent by weight carbon, 0.5 to 1.5 percent by weight manganese, up to about 0.8 percent by weight chromium, 0.05 to 4 percent by weight nickel, and 0.02 to 0.8 percent by weight molybdenum. In another example, such steel comprises in the range of from about 0.1 to 0.3 percent by weight carbon, 0.9 to 1.5 percent by weight manganese, 0.1 to 0.5 percent by weight silicon, and one or more microalloying element selected from the group consisting of vanadium, niobium, titanium, zirconium, aluminum and mixtures thereof.

Abstract translation: 本发明的钻头加强构件或坯料由碳含量小于约0.3重量％，屈服强度至少为55,000psi，抗拉强度至少为80,000psi的高强度钢形成， 在奥氏体相对铁素体相变期间，至少40CVN-L，Ft-lb，膨胀率变化率小于约0.0025％/°F。 在一个实施方案中，这种钢包含约0.1至0.3重量％的碳，0.5至1.5重量％的锰，至多约0.8重量％的铬，0.05至4重量％的镍和0.02至0.8 钼重量百分比。 在另一个实例中，这种钢包含约0.1至0.3重量％的碳，0.9至1.5重量％的锰，0.1至0.5重量％的硅和一种或多种选自钒的微合金元素 ，铌，钛，锆，铝及其混合物。

公开(公告)号：US20090120692A1

公开(公告)日：2009-05-14

申请号：US12120896

申请日：2008-05-15

Applicant: Kumar T. Kembaiyan ,  Madapusi K. Keshavan ,  Alysia C. White ,  Brian A. White

Inventor： Kumar T. Kembaiyan ,  Madapusi K. Keshavan ,  Alysia C. White ,  Brian A. White

IPC: E21B10/46 ,  E21B10/26 ,  C23C30/00

CPC classification number: E21B10/54

Abstract: A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket, hardfacing applied to at least a selected portion of the drill bit is shown and described. The hardfacing includes a first hardfacing layer disposed on the selected portion of the drill bit, a second hardfacing layer disposed on the first hardfacing layer, wherein the first hardfacing layer has a hardness different than a hardness of the second hardfacing layer.

Abstract translation: 一种具有位于其上的至少一个刀片的钻头体的钻头，设置在所述至少一个刀片上的至少一个切割器凹槽，设置在所述至少一个切割器凹槽中的至少一个切割器，至少施加到所述至少一个刀片的选定部分的硬化面 显示和描述钻头。 表面硬化包括设置在钻头的选定部分上的第一表面硬化层，设置在第一表面硬化层上的第二表面硬化层，其中第一表面硬化层具有与第二表面硬化层的硬度不同的硬度。

公开(公告)号：US20080164070A1

公开(公告)日：2008-07-10

申请号：US11650860

申请日：2007-01-08

Applicant: Madapusi K. Keshavan ,  Kumar T. Kembaiyan ,  Alysia C. White ,  Anthony Griffo

Inventor： Madapusi K. Keshavan ,  Kumar T. Kembaiyan ,  Alysia C. White ,  Anthony Griffo

IPC: E21B10/46

CPC classification number: E21B10/54 ,  E21B10/55

Abstract: A drill bit that includes a matrix bit body having a reinforcing overlay thereon and having at least one blade thereon; at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; and a braze material disposed between the at least one cutter and the at least one cutter pocket, wherein the reinforcing overlay comprises carbide particles and at least one binder and has a melting point greater than a melting point of the braze material is disclosed.

Abstract translation: 一种钻头，其包括其上具有加强覆盖物并且在其上具有至少一个刀片的矩阵钻头体; 设置在所述至少一个叶片上的至少一个切割器袋; 至少一个切割器设置在所述至少一个切割器凹槽中; 以及布置在所述至少一个切割器和所述至少一个切割器袋之间的钎焊材料，其中所述增强覆盖物包含碳化物颗粒和至少一个粘合剂并且具有大于所述钎焊材料的熔点的熔点。

公开(公告)号：US07267187B2

公开(公告)日：2007-09-11

申请号：US10692926

申请日：2003-10-24

Applicant: Kumar T. Kembaiyan

Inventor： Kumar T. Kembaiyan

IPC: E21B10/567

CPC classification number: B23K1/0008 ,  B23B27/148 ,  B23B2222/28 ,  B23B2226/125 ,  B23B2226/315 ,  B23B2240/08 ,  B23K35/3006 ,  B23K2101/20

Abstract: A down hole cutting tool includes a cutting element support structure. The cutting element support structure has at least one cavity formed therein. A cutting element is disposed in the cavity. Braze alloy is also disposed in the cavity between the cutting element and the cutting element support structure. The braze alloy comprises between about 0.5% and about 10% by weight of at least one selected from the group of gallium (Ga), indium (In), thallium (Tl). Methods for building a down hole tool using the braze alloy are also disclosed.

Abstract translation: 井下切割工具包括切割元件支撑结构。 切割元件支撑结构具有形成在其中的至少一个空腔。 切割元件设置在空腔中。 钎焊合金还设置在切割元件和切割元件支撑结构之间的空腔中。 钎焊合金包含约0.5重量％至约10重量％的选自镓（Ga），铟（In），铊（Tl）中的至少一种。 还公开了使用钎焊合金构造井下工具的方法。

公开(公告)号：US07250069B2

公开(公告)日：2007-07-31

申请号：US10464873

申请日：2003-06-18

Applicant: Kumar T. Kembaiyan ,  Thomas W. Oldham

Inventor： Kumar T. Kembaiyan ,  Thomas W. Oldham

IPC: C22C29/08 ,  E21B10/46

CPC classification number: C22C29/08 ,  B22F2005/001 ,  B22F2999/00 ,  C22C1/051 ,  C22C32/0052 ,  E21B10/46 ,  B22F1/0003 ,  C22C29/06 ,  B22F1/0048

Abstract: A new composition for forming a matrix body which includes spherical sintered tungsten carbide and an infiltration binder including one or more metals or alloys is disclosed. In some embodiments, the composition may include a Group VIIIB metal selected from one of Ni, Co, Fe, and alloys thereof. Moreover, the composition may also include cast tungsten carbide. In addition, the composition may also include carburized tungsten carbide.

Abstract translation: 公开了一种用于形成基体的新组合物，其包括球形烧结碳化钨和包含一种或多种金属或合金的渗透粘合剂。 在一些实施方案中，组合物可以包括选自Ni，Co，Fe中的一种的ⅧB族金属及其合金。 此外，组合物还可以包括铸造碳化钨。 此外，组合物还可以包括渗碳碳化钨。

公开(公告)号：US06461401B1

公开(公告)日：2002-10-08

申请号：US09635746

申请日：2000-08-10

Applicant: Kumar T. Kembaiyan ,  Thomas W. Oldham

Inventor： Kumar T. Kembaiyan ,  Thomas W. Oldham

IPC: C22C104

CPC classification number: C22C29/067 ,  B22F7/06 ,  B22F2005/001 ,  E21B10/00

Abstract: A composite structural metal use, for example, in drill bit bodies is disclosed. The metal includes powdered tungsten carbide, and binder metal consisting of a composition by weight of manganese in a range of about zero to 25 percent, nickel in a range of about zero to 15 percent, zinc in a range of about 3 to 20 percent, tin in a range of more than 1 percent to about 10 percent, and copper making up about 24 to 96 percent by weight of the composition. In one embodiment, the composition includes about 6 to 7 percent tin therein. In another embodiment, the composition includes about 0-6 percent by weight of cobalt.

Abstract translation: 公开了一种复合结构金属用途，例如在钻头体中。 该金属包括粉末状碳化钨和由重量约为零至25％的锰组成的粘合剂金属，约0.5至约15％的镍，约3％至20％的锌， 锡在超过1％至约10％的范围内，铜占组合物重量的约24至96％。 在一个实施方案中，组合物包含其中约6至7％的锡。 在另一个实施方案中，组合物包含约0-6重量％的钴。