Two Permian Basin pipeline firms are combining with Midland's EagleClaw Midstream acquiring Humble-based Caprock Midstream for $950 million. The two private equity-backed pipeline and processing firms are both focused on the Permian's Delaware Basin, which is the fastest growing part of the basin in West Texas and New Mexico. Caprock, which was founded in 2015, was jumpstarted with funding from Dallas-based Energy Spectrum Capital while the larger EagleClaw is supported by New York-based Blackstone Energy. Blackstone last year bought EagleClaw for $2 billion from a Texas private equity form, San Antonio's EnCap Flatrock Midstream.