Patent ID: 9650861
Date: 2017-05-16
CPC Classifications: E21B

Claim:
1. A bridge plug tool for use in a well, comprising: a tool body; a mandrel extending through the tool body; a setting sleeve positioned on the tool body; a packer module located below the setting sleeve, the packer module having an expanded position in which its outer surface is expanded radially with respect to the tool body and a contracted position in which its outer surface is substantially the same as that of the tool body; and an anchor module located below the packer module, the anchoring module comprising anchor elements moveable between an expanded position in which the anchor elements extend radially from the tool body and a contracted position in which the anchor elements are substantially aligned with the surface of the tool body; wherein the mandrel extends through the sleeve, packer module and anchor module; the mandrel and setting sleeve are relatively moveable between an axially extended position and an axially contracted position; and wherein the mandrel and setting sleeve engage the anchor module and packer module such that relative movement of the mandrel and setting sleeve between the axially extended and axially contracted positions correspondingly moves the anchor module and packer module between the respective contracted and expanded positions; and wherein the mandrel comprises a main part and an extension part connected by means of a threaded engagement, wherein the extension part engages the tool body such that rotation of the main part extends the extension part by the action of the thread so as to provide relative movement of the mandrel and the sleeve to the extended position; the tool further comprising a locking mechanism for holding the setting sleeve and mandrel in the contracted position, wherein the locking mechanism comprises: a ratchet sleeve surrounding the mandrel which extends within and engages the setting sleeve; and locking dogs located within the ratchet sleeve which engage the mandrel; and a release mechanism for releasing the mandrel and sleeve from the contracted position, wherein the release mechanism comprises a release sleeve which extends within the ratchet sleeve and is axially moveable to allow the locking dogs to disengage from the mandrel.