Patent ID: 8973664
Filing Date: 2015-03-10
Classification: E21B

Abstract:
1. A wellhead assembly comprising: a low pressure housing that is annular and has a lower end for setting in a sea floor; a low pressure housing upper socket surface formed along a portion of an inner surface of the low pressure housing and a low pressure housing lower socket surface formed along a portion of the inner surface of the low pressure housing that is axially spaced apart from the to pressure housing upper socket surface; a low pressure housing load shoulder formed in the inner surface of the low pressure housing at a point axially between the low pressure upper socket surface and the low pressure lower socket surface; a latch profile formed in the inner surface of the low pressure housing at a point axially between the load shoulder and the low pressure socket surface; an annular high pressure housing having a single-piece body that is annular and coaxially disposed within the low pressure housing; a high pressure housing upper socket surface integrally formed with the body of the high pressure housing along a portion of an outer surface of the high pressure housing that is in contact with the low pressure housing upper socket surface; a high pressure housing lower socket surface integrally formed with the body of the high pressure housing on the outer surface of the high pressure housing axially spaced apart from the high pressure housing upper socket surface and in contact with the low pressure housing lower socket surface; a high pressure housing load shoulder on the high pressure housing landed on the low pressure housing load shoulder in the inner surface of the low pressure housing; a latch carried by the high pressure housing that engages the latch profile in the inner surface of the low pressure housing; and wherein the high pressure housing and low pressure housing upper socket surface are cylindrical and the high pressure housing and low pressure housing lower socket surfaces are cylindrical.