Gauge cutter and sampler apparatus

An apparatus comprising:

• a first body comprising a coupling;
• a second body comprising a cutter blade, wherein the coupling is separated from contact with the second body in an open position and is configured to couple the first body to the second body in a closed position in response to the coupling contacting the second body, wherein the first body and the second body cooperatively define an inner volume;
• a shear pin extending from the second body and into the first body, wherein the shear pin is configured to hold the position of the second body relative to the first body in the open position while the shear pin is intact, and the second body is configured to be able to move relative to the first body in response to the shear pin being sheared;
• and
• a divider disposed within the inner volume, the divider defining an inner bore, wherein:
• in the open position, the apparatus defines:
• a first flow path for fluids and solids to pass through the apparatus, the first flow path defined through the first body and through the inner bore of the divider, and
• a second flow path for fluids and solids to pass through the apparatus, the second flow path defined through the first body and through an annulus surrounding the divider;
• and
• in the closed position, the second flow path is closed, such that solids remain in the annulus surrounding the divider.

A method implemented by a gauge cutter apparatus comprising a first body, a second body, a shear pin, and a divider, wherein the first body comprises a snap ring, the second body comprises a gauge cutter, the first body and the second body define an inner volume, the divider is disposed within the inner volume, and the method comprises:

• separating, by the divider, the inner volume into a first flow path through the gauge cutter apparatus and a second flow path through the gauge cutter apparatus, wherein the first flow path is defined through an inner bore of the divider, and the second flow path is defined through an annulus surrounding the divider;
• coupling, by the shear pin, the second body to the first body, thereby securing a position of the second body relative to the first body in an open position;
• cutting, by the gauge cutter during a downhole motion of the gauge cutter apparatus through a tubing in a wellbore, a material from an inner wall of the tubing, such that the material is released from the inner wall of the tubing;
• in response to the gauge cutter cutting the material from the inner wall of the tubing, shearing the shear pin, thereby allowing the second body to move relative to the first body;
• contacting, by the snap ring during the downhole motion of the gauge cutter apparatus through the tubing, the second body;
• in response to the snap ring contacting the second body, securing the position of the second body relative to the first body in a closed position and closing the second flow path, such that the second flow path ends with the annulus surrounding the divider;
• separating, by the divider during an uphole motion of the gauge cutter apparatus through the tubing, the material into the first flow path through the gauge cutter apparatus and the closed second flow path into the annulus surrounding the divider;
• and
• collecting a sample of the material in the annulus surrounding the divider.