Systems and methods for obtaining a shape of a component within a subterranean well with an impression tool includes the impression tool having a top sub. The top sub is an elongated member having a central axis and a downhole facing surface. A threaded recess of the top sub extends axially from the downhole facing surface. A bottom body section has a block body, a lead impression block positioned at a downhole side of the block body, and a threaded member located at an uphole side of the block body. The threaded member of the bottom body section threadingly engages the threaded recess of the top sub. The bottom body section is operable to be selectively threaded to, and unthreaded from, the top sub.

An apparatus includes a gauge cutter, a lead impression block (LIB), a locking pin, and a locking device. The gauge cutter has a gauge cutter tubular body, a gauge cutter head, and an orifice. The LIB has an LIB body and an LIB head. The LIB is fixed in a first position within the orifice of the gauge cutter by being connected to an inner circumferential surface of the gauge cutter tubular body using a shear pin. The locking pin is disposed around the LIB body. The locking device is disposed around the inner circumferential surface of the gauge cutter tubular body and is configured to mate with the locking pin to hold the LIB in a second position within the gauge cutter. The second position includes a portion of the LIB body located within the orifice and the LIB head located outside of the orifice.

An apparatus includes a gauge cutter, a lead impression block (LIB), a locking pin, and a locking device. The gauge cutter has a gauge cutter tubular body, a gauge cutter head, and an orifice. The LIB has an LIB body and an LIB head. The LIB is fixed in a first position within the orifice of the gauge cutter by being connected to an inner circumferential surface of the gauge cutter tubular body using a shear pin. The locking pin is disposed around the LIB body. The locking device is disposed around the inner circumferential surface of the gauge cutter tubular body and is configured to mate with the locking pin to hold the LIB in a second position within the gauge cutter. The second position includes a portion of the LIB body located within the orifice and the LIB head located outside of the orifice.

A lead-free pinscreen imprint device for retrieving at least one imprint of a topmost surface of a fish located in a wellbore may include a housing with a central aperture that extends along a section of a central axis thereof. The lead-free pinscreen imprint device may include a pinscreen portion disposed in the housing. The pinscreen portion may include various pins that are disposed along a vertical axis that is parallel to the central axis. The pinscreen portion may include an imprint surface that faces in a downward direction and a scanning surface that faces in an upward direction. The lead-free pinscreen imprint device may include a three-dimensional (3D) laser image scanner disposed in the housing at a location that is immediately above the pinscreen portion. The 3D laser image scanner may be configured to scan the scanning surface and identify any depth changes in the scanning surface.

A lead-free pinscreen imprint device for retrieving at least one imprint of a topmost surface of a fish located in a wellbore may include a housing with a central aperture that extends along a section of a central axis thereof. The lead-free pinscreen imprint device may include a pinscreen portion disposed in the housing. The pinscreen portion may include various pins that are disposed along a vertical axis that is parallel to the central axis. The pinscreen portion may include an imprint surface that faces in a downward direction and a scanning surface that faces in an upward direction. The lead-free pinscreen imprint device may include a three-dimensional (3D) laser image scanner disposed in the housing at a location that is immediately above the pinscreen portion. The 3D laser image scanner may be configured to scan the scanning surface and identify any depth changes in the scanning surface.

A method is for testing the pressure integrity of a barrier in an annulus outside a pipe string in a wellbore, the method including the steps of: establishing a fluid connection between an inside of the pipe string and an annulus out-side the pipe string at a first position and second positions in the wellbore, the second position being offset from the first position along the axial direction of the wellbore; establishing a temporary barrier between the fluid connections at the first and second positions in the wellbore; establishing a pressure differential across the temporary barrier; releasing a tracer from below the temporary barrier; and sniffing for tracer above the temporary barrier to verify a leakage through the temporary barrier and/or the barrier in the annulus. There is also disclosed a tool for executing such a method.

A method is for testing the pressure integrity of a barrier in an annulus outside a pipe string in a wellbore, the method including the steps of: establishing a fluid connection between an inside of the pipe string and an annulus out-side the pipe string at a first position and second positions in the wellbore, the second position being offset from the first position along the axial direction of the wellbore; establishing a temporary barrier between the fluid connections at the first and second positions in the wellbore; establishing a pressure differential across the temporary barrier; releasing a tracer from below the temporary barrier; and sniffing for tracer above the temporary barrier to verify a leakage through the temporary barrier and/or the barrier in the annulus. There is also disclosed a tool for executing such a method.

A lead impression system having a downhole tool and a lead impression assembly assembled radially around the downhole tool is landed on a previously installed host casing hanger or a casing hanger being installed in the current/same trip to obtain a lead impression from the bore of the wellhead housing and indicate where the host casing hanger is located axially within the wellhead housing with respect to a feature on the bore of the wellhead housing from which the lead impression is obtained. Lead impression modules in the assembly have a lead pad that protrudes radially outward through a window on an outer sleeve according to a pressure differential between an internal and an external pressure of the lead impression assembly. The lead pad retracts to its pre-set position when the pressure differential exceeds a preset burst pressure.

Reservoir sweep efficiency includes obtaining fluid front arrival times for streamlines in a reservoir. A wellbore is partitioned into independent production zones, and a target flow rate is allocated to each of the independent production zones based on the fluid front arrival times. Partition choke parameters complying with the target flow rates are allocated to generate a completion design, which is presented.

Reservoir sweep efficiency includes obtaining fluid front arrival times for streamlines in a reservoir. A wellbore is partitioned into independent production zones, and a target flow rate is allocated to each of the independent production zones based on the fluid front arrival times. Partition choke parameters complying with the target flow rates are allocated to generate a completion design, which is presented.