Oil and gas reservoir electric logging overflow safety control wireline hanger

摘要

The present invention provides an oil and gas reservoir electronic logging overflow safety control wireline hanger which comprises a body (1) and a wireline clamping apparatus. Threads (5) are provided on a part of the outer surface of the upper end of the body (1). An entry opening (12) extending along a vertical direction is provided in the body (1) to receive the wireline. A tapering-down, truncated cone shaped passage (2) is provided inside the body (1). A detachable support apparatus (9) is fixed on the upper part of the body (1). The wireline clamping apparatus comprises two wedges (3), and each has a sector shaped cross-section and tapering-down truncated cone shape corresponding to the passage (2). The wedges are symmetrically fixed inside the passage (2) so that a wireline hole (4), with a diameter less than that of the wireline, is formed between the two wedges (3).

主权项

1. An oil and gas reservoir electronic logging overflow safety control wireline hanger, comprising a body and a wireline clamping apparatus,
wherein threads are provided on a part of an outer surface of an upper end of the body, the body is provided with a tapering-down truncated cone shaped passage and a wireline entry opening extending along a vertical direction to receive a wireline, a detachable support apparatus is fixed to the upper end of the body, and the wireline clamping apparatus comprises two wedges each of which has a sector shaped cross-section and a tapering-down truncated cone shape corresponding to the truncated cone shaped passage, and wherein the two wedges are symmetrically fixed inside the truncated cone shaped passage so that a wireline hole is formed between the two wedges, when the two wedges are fully pressed together, a diameter of the wireline hole is less than that of the wireline received between the two wedges; wherein threads are provided on a part of an inner surface of the upper end of the body to fix a wedge nut capable of pushing up the two wedges tightly and the wedge nut is provided with a through-hole to communicate with the wireline hole.