The part of a sentence "had never established" is correct and usable in written English.
You can use this phrase when you are talking about something that was never set up, or agreed upon, or made clear. For example, "Although they had been roommates for years, they had never established clear boundaries for the apartment."
And another respected commentator on security affairs, Dr Reuvain Pedhazur, wrote that since the establishment of the state the political leadership had never established a serious alternative to the Israeli defense forces (IDF) policy forums when it comes to decision-making about war and peace.
Since it first arrived in 1897, Vickers had never established a smooth relationship with the workforce.
Living in an ecological environment that favoured tribal independence and small-group loyalties, the Arabs had never established lasting large-scale states, only transient tribal confederations.
Prior to the removal of Pluto from the official list of planets, astronomers had never established a rigorous scientific definition of a solar system planet, nor had they agreed on a minimum mass, radius, or mechanism of origin for a body to qualify as one.
As an insurgent candidate in 1968, Gravel had never established a firm party base.
Former President Bill Clinton at the 2006 World AIDS Conference on being asked why the United States government had never established ongoing programs for its own AIDS orphans America has the most AIDS orphans in the Western world, but you'd hardly know.
He has never established a recording career.
Scotland Yard has never established how the assassins transported the polonium.
"The scientific community has never established that coercive interrogation methods are an effective means of obtaining reliable intelligence information".
A former American official said intelligence experts have never established a direct link between the trade and Mr. bin Laden.
Treasury Secretary Paul H. O'Neill, a former chief executive of Alcoa, has never established himself with the financial markets.
