System to perforate a cemented liner having lines or tools outside the liner
AssigneeSchlumberger Technology Corporation
InventorMichele Arena
Life of this patent
Estimating the term…
Abstract
The present application relates to a downhole perforating system having a cemented-in lower completion including one or more orienting nipples, each orienting nipple having a recess key, and one or more lines or tools carried on the exterior of the lower completion and oriented relative to the recess key. The downhole perforating system also includes a perforating string having one or more blank sections oriented relative to an orienting key that is brought into alignment with the recess key when the perforating string is landed in the orienting nipple. Upon landing, the perforating string can be fired without damaging the lines or tools outside the lower completion.
Claims20
A downhole perforating system, comprising:
- a cemented-in lower completion including one or more orienting nipples, each orienting nipple having a recess key, and one or more lines or tools carried on the exterior of the lower completion and oriented relative to the recess key;
- and
- a perforating string having one or more blank sections oriented relative to an orienting key that is brought into alignment with the recess key when the perforating string is landed in the orienting nipple.
A method to perforate a lower completion disposed in a wellbore, comprising:
- providing the lower completion, wherein the lower completion includes one or more orienting nipples, each orienting nipple having a recess key, and one or more lines or tools carried on the exterior of the lower completion and oriented relative to the recess key;
- disposing the lower completion in the wellbore;
- cementing in place the lower completion disposed in the wellbore;
- connecting the lines or tools to an upper completion using a wet connector;
- running into the interior of the lower completion a perforating string having one or more blank sections oriented relative to an orienting key that is brought into alignment with the recess key when the perforating string is landed in one of the orienting nipples;
- and
- perforating the lower completion by firing shaped charges carried on the perforating string without damaging the lines or tools carried on the exterior of the lower completion.
A method to orient a perforating device, comprising:
- assembling a lower completion using liners, quick connectors, and orienting nipples;
- using the quick connectors to secure lines or tools to the exterior surface of the lower completion in a desired orientation relative to a point on the lower completion;
- using the quick connectors to orient a recess key in each of the orienting nipples relative to the point on the lower completion;
- and
- using one of the recess keys to orient an orienting key on the perforating device, thereby orienting the perforating device relative to the point on the lower completion.
Dependencies are inferred from the claim text.