"disengaged himself from" is a correct and usable phrase in written English.
It means to separate or detach oneself from something or someone. Example: After years of working at the company, John finally decided to disengaged himself from his colleagues and pursue a career in a different field. In this example, "disengaged himself from" shows that John is separating himself from his current job and colleagues in order to move on to a new career path.
Scholes disengaged himself from midfield when he spotted, or sensed, Wayne Rooney running with the ball toward Bolton's penalty box.
The writer of the suicide note has disengaged himself from his past; what he remembers are only slights, failures, and grievances.
Mr. Protas maintained that in the last two years he had disengaged himself from the administrative management of the company to concentrate on artistic matters.
Strayed's stepfather, whom she had loved, disengaged himself from the family and quickly found new love, unwilling even to take care of his late wife's beloved mare, who became so enfeebled that — in one of the book's most harrowing scenes — Strayed and her brother are forced to put her down.
Lennon disengaged himself from the music business in 1975 to raise his infant son Sean, but re-emerged with Ono in 1980 with the new album Double Fantasy.
Gilmore disengages himself from the conversation with impressive speed.
If Allen Craig hadn't had to disengage himself from Will Middlebrooks's legs, he'd have scored easily.
" I felt the impulse to ask Bernhardt if at any point he had found it necessary to disengage himself from the eight hundred.
And Messi saw out of the corner of his eye that Pedro also was on the move, to disengage himself from the remnants of the Madrid defense.
He photographed his subjects at a conversational distance and, he said, to avoid disengaging himself from the situation, he never used a telephoto lens.
Disengaging himself from the throng, he made his way to those gathered for a group photo with the mayor, who had reminded the guests of the need for philanthropy, that "not everyone is as lucky as us".
