RPC. has filed a patent for a downhole well tool assembly that includes a perforator and a selectively openable and closable perforation plug discharge port. The assembly allows for perforating and treating multiple formation zones of a well in a single trip. The patent also includes a valve assembly that can selectively open and close the perforation plug discharge port based on the manipulation of fluid flow rate. GlobalData’s report on RPC gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on RPC, Water gas shift catalysts was a key innovation area identified from patents. RPC's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
A downhole well tool assembly with a selectively openable and closable perforation plug discharge port
A recently filed patent (Publication Number: US20230127815A1) describes a downhole well tool assembly that includes a perforator, a selectively openable and closable perforation plug discharge port, and a valve assembly. The valve assembly is designed to selectively open and close the perforation plug discharge port by manipulating the flow rate of a fluid through a longitudinal flow passage. This manipulation involves decreasing the flow rate after it has been increased to a predetermined level.
The downhole well tool assembly also includes a valve that opens and allows fluid flow through the flow passage to the perforator when the perforation plug discharge port is closed. Conversely, the valve closes and prevents fluid flow through the flow passage to the perforator when the perforation plug discharge port is open. This arrangement ensures that the perforation plug discharge port is positioned downstream of the perforator relative to fluid flow through the flow passage.
The patent also describes a method for perforating and treating multiple formation zones of a well in a single trip of the downhole well tool assembly. The method involves perforating a first zone using an abrasive perforator, treating the first zone by flowing a treatment fluid through the annulus formed between the downhole well tool assembly and the casing of the well, and discharging perforation plugs from the downhole well tool assembly to plug the perforations of the first zone. The flow rate of the fluid flowing through the downhole well tool assembly is manipulated to open the perforation plug discharge port during this process.
After treating the first zone, the downhole well tool assembly is positioned at a second zone, and the process is repeated. The second zone is perforated using the abrasive perforator, and the treatment fluid is flowed through the annulus to treat the second zone.
The method allows for the commencement of certain steps before the conclusion of others. For example, step (c) of discharging the perforation plugs can be commenced prior to the conclusion of step (b) of treating the first zone. Similarly, step (d) of positioning the downhole well tool assembly at the second zone can be commenced prior to the conclusion of step (b) or step (c).
Overall, this patent presents a downhole well tool assembly and a method for perforating and treating multiple formation zones in a well efficiently and effectively. The manipulation of flow rate and the selective opening and closing of the perforation plug discharge port contribute to the success of the method.
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