Patent ID: 8307889

Claim:
An assembly for controlling an annulus between tubulars comprising: a first annular member securable to an outer tubular; a second annular member securable to the first annular member; wherein each of the first and second annular members have eccentric bores therethrough; wherein the tubulars are nonconcentric; and wherein the orientation of the annular members about the tubulars is determined by a value derived from the following equation: Alignment Value= D 1 /D 2 ×90 where (1) D 1 =the minimum annular distance between non-concentric tubulars; (2) D 2 =the annular distance between the same tubulars if concentric to one another; and (3) 90 represents the maximum rotational orientation required of each annular member to travel through a complete range of offsets.