The Rebco HD Hold-Down Tool, also known in the field as the No-Blow Tool, is an essential safety and operational accessory for BHP surveying in active or flowing wells. Its purpose is straightforward but critical: when a well is producing gas or fluid upward through the tubing during a survey, the upward flow creates a force that acts on the instrument assembly and tries to push it, and the entire wireline tool string back up the tubing. In severe cases, this upward force can blow the instruments and tool string back to the surface uncontrollably, creating a hazardous situation at the wellhead. The HD Hold-Down is placed in the tool string above the instrument assembly, and its spring-loaded dogs expand against the tubing wall to anchor the tool string downward against the upward flow force.

A second benefit of the HD is that by anchoring the tool string in place, it reduces the total number of Stems required to keep the instruments at the survey depth, since the hold-down force from the dog grip supplements the weight of the stem, the operator can use less stem weight to achieve the same depth stability. The HD is available in nominal sizes 1½" through 5½", in both Amerada (¾"–16) and Sucker Rod (15/16"–10) pin-box thread connections, and is manufactured from Stainless Steel throughout for corrosion resistance in wellbore fluid environments.

How to Order: Available in assembly numbers 11006032060 through 11006035500 (Amerada) and 11006032061 through 11006035501 (Sucker Rod). Specify nominal size and thread connection type (Amerada or Sucker Rod) when ordering.