The Republican Party is a based on Oil, Racism, Guns and Abortion.
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Big Oil already has what it paid for:
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Climate Change Denial in the White House; Senate; and House
State Dept.;
EPA
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The Red-Necks, gun-nuts, and evangelical Christians will never stop ranting, not even when the courts and public opinion are against them.
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They nonetheless remain "useful idiots", as Lenin might have said: as long as they are periodically tantalised with red meat they will keep frothing at the mouth, and will keep voting for the Climate Change Denial policies.  That's all Big Oil cares about.
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In the end, politics is about money; and for the money guys in the Republican Party the only thing that ever matters is Oil.
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If Trump and Congress never manage to pass a single bill, the Oil Companies don't care.
They already have what they want.  Anything more is gravy.
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Repealing Obamacare would have been bad for Big Oil = 2018 loss of the House or Senate.
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So Big Oil let repeal die. Not what they need.