Reverse Circulation Drilling Hammer

 

 

A Reverse Circulation Drilling Hammer is a specialized drilling tool used in reverse circulation drilling operations. In reverse circulation drilling, the drilling fluid and cuttings are brought to the surface through an inner tube, allowing for efficient and high-quality sample collection from the subsurface.

 

 

Reverse Circulation Drilling Hammers are connected to the RC (Reverse Circulation) Drill Pipe using a specific connection method to facilitate the efficient flow of drilling fluids and cuttings in reverse circulation drilling. Here's how the connection between the hammer and RC drill pipe typically works:

 

Hammer Sub: The Reverse Circulation Drilling Hammer has a threaded sub or connection point at its upper end. This sub is designed to connect to the lower end of the RC drill pipe.

 

RC Drill Pipe: The RC drill pipe also has a corresponding threaded connection at its lower end, known as the "hammer sub" or "hammer joint." This connection is specifically designed to match the hammer's sub.

 

Threaded Connection: To make the connection, the threaded sub of the Reverse Circulation Drilling Hammer is screwed onto the threaded connection of the RC drill pipe. This creates a secure and sealed connection between the two components.

 

Sealing and Locking: To ensure a proper seal and prevent leaks, a sealing element, such as an O-ring or seal, may be used within the threaded connection. This helps maintain the integrity of the drilling fluid flow.

 

Torqueing: Proper torqueing or tightening of the connection is essential to maintain the integrity of the connection and prevent any separation during drilling operations. A torque wrench or similar tool may be used to achieve the recommended torque values specified by the manufacturer.

 

Inspection: Before drilling operations begin, it's important to inspect the connection to ensure that it is properly tightened, sealed, and free of any defects that could affect the flow of drilling fluids.