TESCOM CORPORATION
198Patents
151Active
198Granted
55Portfolio score
Filing activity: Jul 14, 1980 → May 16, 2022 · 67 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6311792A | Casing clamp | Fixed Constructions | 204 | Expired |
| US6742584B1 | Apparatus for facilitating the connection of tubulars using a top drive | Fixed Constructions | 125 | Expired |
| US7108080B2 | Method and apparatus for drilling a borehole with a borehole liner | Fixed Constructions | 117 | Expired |
| US7140443B2 | Pipe handling device, method and system | Fixed Constructions | 111 | Expired |
| US6199641A | Pipe gripping device | Fixed Constructions | 89 | Expired |
| US7861781B2 | Pump down cement retaining device | Fixed Constructions | 72 | Active |
| US7044241B2 | Method for drilling with casing | Fixed Constructions | 64 | Expired |
| US5345376A | Switching power supply with electronic isolation | Electricity | 59 | Expired |
| US6705413B1 | Drilling with casing | Fixed Constructions | 54 | Expired |
| US7270189B2 | Top drive assembly | Fixed Constructions | 51 | Expired |
| US7013992B2 | Borehole stabilization while drilling | Fixed Constructions | 47 | Expired |
| US7694730B2 | Spear type blow out preventer | Fixed Constructions | 41 | Active |
| US7854265B2 | Pipe gripping assembly with power screw actuator and method of gripping pipe on a rig | Fixed Constructions | 39 | Active |
| US7909109B2 | Anchoring device for a wellbore tool | Fixed Constructions | 38 | Active |
| US7878237B2 | Actuation system for an oilfield tubular handling system | Fixed Constructions | 37 | Active |
| US5413311A | Gas valve | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5039837A | Plasma torch head, body, handle and control circuitry | Electricity | 37 | Expired |
| US7082997B2 | Pipe centralizer and method of attachment | Emerging Cross-Sectional Technologies | 37 | Expired |
| US8651175B2 | Top drive output torque measurement method | Fixed Constructions | 32 | Active |
| US6679335B2 | Method for preparing casing for use in a wellbore | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5234026A | Pressure reducing regulator | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5755289A | Drilling rig elevator with replaceable clamping inserts and method for installation | Fixed Constructions | 27 | Expired |
| US7784552B2 | Liner drilling method | Fixed Constructions | 25 | Active |
| US7140455B2 | Valve method for drilling with casing using pressurized drilling fluid | Fixed Constructions | 23 | Expired |
| US7219727B2 | Wear resistant tubular connection | Fixed Constructions | 23 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.