Cementing Tools And Casing Accoessories Tools
Cementing, the construction of running casing into the well, and injecting cement into the annular space between the wellbore and the casing. It is an indispensable and important link in the process of drilling and completion operations, which includes casing running and cement injection.
Cementing technology is a multi-disciplinary comprehensive application technology, which is systematic, one-time and short in time. The main purpose of cementing is to protect and support the casing in oil and gas wells, and to seal oil, gas and water formations.
1. Floation Collar:
Floation collar is used for completion operation in extended reach well.It technically uses a sealing device to seal a certain light liquid or gas in the casing to reduce the weight of the entire casing string in the drilling fluid, thereby effectively reducing the friction between the casing and the borehole wall, and solving the problem of large displacement Difficulty in running casing during well completion. It has a simple structure, strong practicability, can reduce frictional resistance so that the casing can be smoothly lowered to position, and can be widely used in oilfield drill bit extended-reach completion operations.
2. Casing scraper:
Casing scraper is mainly used in cleaning cement,sandy,residual bullets,scratches,paraffin,burs and other attchments from inner wall of cassing,to keep inner wall of casing clean,so as to run into various downhole tools.
3. Washover Pipe:
The washover pipe is a necessary tool for performing washover operation,and washover operation can relieve various of sticking accidengts in the well.In addition to rotary washover function,it can also sand washover,salt washover,hot washing and deblocking etc.
4. Guide Shoe:
Casing guide shoe is mainly used as running in casing guide equipment and connect at the bottom of casing,in order to ensure casing does not poke towards well and make casing run into well smoothly.
5. Reamer Shoe:
Reamer shoes can overcome the obstacle of wellbore and guide the casing or liner to desired depth.
It has short shape and best cutting structure. So it can relieve the expectable and unnexpectable difficulties in running in casing for liner process.