With a 917 rank in AP ECET for Civil Engineering and as an OC candidate, you have a good chance of getting admission into several well-regarded engineering colleges in Andhra Pradesh. Here are some colleges where you might secure a seat based on previous years' cutoffs:

1. JNTU Kakinada - Known for its reputation and strong placements in engineering.
   
   
2. Andhra University College of Engineering, Visakhapatnam - Often sought after for its quality education and campus facilities.
   
   
3. Sri Venkateswara University College of Engineering, Tirupati - Has a good Civil Engineering program.
   
   
4. University College of Engineering, Anantapur (JNTUA) - Known for solid infrastructure and faculty.
   
   
5. G. Pulla Reddy Engineering College, Kurnool - Known for good placements and campus facilities.
   
   
6. RVR & JC College of Engineering, Guntur - A popular choice among students for civil and other engineering branches.

Admission chances will ultimately depend on the exact cutoffs in the 2024 counseling sessions, so it’s beneficial to prioritize these and similar colleges during the seat allocation process.