Tool positioning technique
AssigneeSchlumberger Technology Corporation
InventorRod William Shampine
Life of this patent
Estimating the term…
Abstract
Systems and techniques for locating a tool component in a channel of a blowout preventer. The system and technique may include the use of glide rams that are configured to sealably engage a deployment bar of a toolstring supporting the tool component in the channel. The glide rams may allow for movement of the deployment bar and toolstring while maintaining the seal. Due to greater diameter of the tool component, contact with the rams may be detected in the form of a spike in load detected at an oilfield surface by equipment supporting the conveyance means for the toolstring. Thus, tool component location may be ascertained. This same diameter difference of the tool component may also be utilized to deflect a member in the channel for sake of tool location.
Claims20
A method of moving a toolstring through a blowout preventer, the method comprising:
- moving the toolstring through a channel of the blowout preventer;
- contacting one of a pair of glide rams and a deflectable member with a tool component of the toolstring, wherein the pair of glide rams is one of a plurality of rams pairs;
- detecting the contacting;
- and
- changing positioning of a pair of rams of the plurality in response to the detecting.
A method of moving a toolstring through a blowout preventer, the method comprising:
- moving the toolstring through a channel of the blowout preventer;
- engaging a deployment bar of the toolstring with a pair of glide rams during the moving;
- contacting the pair with a tool component of the toolstring;
- detecting the contacting;
- and
- disengaging the pair of glide rams from the deployment bar in response to the detecting of the contacting.
A blowout preventer comprising:
- a plurality of pairs of glide rams interfacing a channel through the preventer, the glide rams configured for sealably engaging a deployment bar of a toolstring and to facilitate movement of the bar during the engaging;
- and
- a deflectable member disposed in the channel between pairs of the plurality, the toolstring having a component for contacting one of the deflectable member and a pair of the plurality to trigger disengagement of the rams from the deployment bar.
Dependencies are inferred from the claim text.