| 摘要 |
<p>A method of fracturing a formation 24 that at the same time drills a wellbore 22 through the formation 24 selectively deploys a seal from a drill string 26 to define a space 64 in the wellbore 22 beneath the seal; and the pressurizes the space 64. The seal can be formed by moving sliding blades 58 into channels 56 between cutting blades 42 on a drill bit 40. The seal can also be a packer 62 on the drill bit 40 that selectively expands radially outward into sealing engagement with the wellbore 22. At a designated depth in the wellbore 22, the seal is deployed and fluid is diverted into the space 64. A pressurizing system pressurizes the fluid so that pressure in the space 64 overcomes the formation 24 strength and fractures the formation 24 adjacent the enclosed, space 64. The packer 62 can be released, drilling can resume, and. fracturing can occur at a different depth in the wellbore 22.</p> |
