US 12,404,765 B1
Sand bailer and lead impression block combination for downhole sample collection and obstruction diagnosis
Ghulam Murtaza Kalwar, Udhailiyah (SA); and Abdulaziz M Sagr, Udhailiyah (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Feb. 29, 2024, as Appl. No. 18/592,133.
Int. Cl. E21B 47/098 (2012.01); E21B 27/00 (2006.01); E21B 34/14 (2006.01)
CPC E21B 47/098 (2020.05) [E21B 27/00 (2013.01); E21B 34/142 (2020.05); E21B 2200/04 (2020.05); E21B 2200/05 (2020.05)] 14 Claims
OG exemplary drawing
 
8. A method for detecting an obstruction in a tubular, the method comprising:
running an apparatus to a location adjacent to an obstruction in the tubular, wherein the apparatus comprises a lead impression block connected to a sand bailer using a valve, wherein the lead impression block comprises lead filled into a shoe of the valve to create a lead-filled shoe and a pathway formed into a center of the lead-filled shoe;
lowering the apparatus onto the obstruction to compress a piston located in a barrel of the sand bailer and obtain an impression of the obstruction on the lead impression block;
pulling the apparatus off of the obstruction to cause the piston to stroke and create a suction pressure in a cavity of the barrel to open the valve;
retrieving a sample of the obstruction from the tubular, through the valve, and into the cavity of the barrel using the suction pressure;
holding the sample of the obstruction in the cavity of the barrel using the valve; and
pulling the apparatus from the tubular to analyze the sample and the impression of the obstruction.