Patent ID: 8215391
Filing Date: 2012-07-10
Classification: E21B

Abstract:
1. A method of collecting single phase fluid samples from a well extending below a surface of the earth, the method comprising: running first and second fluid samplers into the well on a coiled tubing string by deploying a continuous pipe string from a coiled tubing reel, the fluid samplers each including a longitudinally extending central passageway defining a charging chamber, a metering fluid chamber and a sample fluid chamber, the fluid samplers in fluid communication with each via an internal bypass passageway of the first fluid sampler; actuating the first fluid sampler to establish fluid communication between the sample fluid chamber of the first fluid sampler and an exterior of the first fluid sampler; obtaining a fluid sample from the well in the sample fluid chamber of the first fluid sampler at a controlled rate by metering a fluid through a restriction in the metering fluid chamber of the first fluid sampler; actuating the second fluid sampler to establish fluid communication between the sample fluid chamber of the second fluid sampler and an exterior of the second fluid sampler; obtaining a fluid sample from the well in the sample fluid chamber of the second fluid sampler at a controlled rate by metering a fluid through a restriction in the metering fluid chamber of the second fluid sampler; increasing fluid pressure in the coiled tubing string and the internal bypass passageway using a pressure source located above the surface of the earth to pressurize fluid in the charging chambers of the first and second fluid samplers; pressurizing the fluid samples in response to increasing fluid pressure in the charging chambers; and retrieving the coiled tubing and the fluid samplers containing the fluid samples from the well.