Why does Eliezer address his prayer to Hashem, 24(12), “Hashem, the G-d of my master Avrohom” and repeat this formulation in verses 27 and 42. He himself was after all a believer. In verse 35, he is content to say “And Hashem blessed my master exceedingly…” without the mention of “the G-d of my master Avrohom”.
On 24(12), Ohr HaChaim says that he was confident that in the merit of Avrohom his prayer would be answered and Haemek Dovor says, he starts the prayer with praise of Hashem before making his request as is proper.
Are there other explanations please?