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An improved apparatus and a method to insert a wireline through a blow out preventer to log an underbalanced open hole well without killing the well or causing formation damage while maintaining well control during the process. A dual throated blow out preventer (10) provides a moveable sealing elem

An improved apparatus and a method to insert a wireline through a blow out preventer to log an underbalanced open hole well without killing the well or causing formation damage while maintaining well control during the process. A dual throated blow out preventer (10) provides a moveable sealing element (1210, 1402) to allow a wireline (13) and a drill string (25) to be placed in a well for assembly, then seals off the dual throat to isolate the drill string from the wireline, thereby permitting pressure to be maintained on both the wireline through a standard packoff arrangement (1218) and on the drill string using the rams of the blow out preventer (10).

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1. A method of inserting a wireline into a dual channel rotating blow out preventer comprising: closing a pressure isolation valve in a well bore;rigging up wireline tools on a rotary floor;reeving a wireline through a wireline packoff assembly and a cable side entry sub;connecting a downhole wet co

1. A method of inserting a wireline into a dual channel rotating blow out preventer comprising: closing a pressure isolation valve in a well bore;rigging up wireline tools on a rotary floor;reeving a wireline through a wireline packoff assembly and a cable side entry sub;connecting a downhole wet connector head to tools and making up drill pipe;running an assembly containing the wireline tools to a position above the pressure isolation valve;connecting the downhole wet connector head to the wireline such that communication and power may be transmitted to or from Earth's surface;slacking off the wireline and tying the wireline to the cable side entry sub;moving the drillstring to a position that the cable side entry sub is below the rotating blow out preventer;moving the wireline into a wireline channel fabricated in the rotating blow out preventer;manipulating a sealing element in the rotating blow out preventer to separate the wireline channel from a drillstring channel;closing the seals on the wireline packoff assembly;closing the seals on the rotating blow out preventer;equalizing pressure in the drillstring channel with the pressure at the pressure isolation valve; andinserting the drillstring into the well under pressure while rotating the drillstring. 2. The method of claim 1 further comprising using the sealing element to seal the wireline and the drillstring to pressures independent of each other. 3. The method of claim 1 wherein the downhole wet connector head is attached to a logging string. 4. The method of claim 1 wherein the wireline is sealed to pressure by a wireline lubricator and the wireline packoff assembly. 5. The method of claim 1 further comprising operating the rotating blow out preventer with an underbalanced well. 6. A method of inserting a wireline into a dual channel rotating blow out preventer comprising: closing a pressure isolation valve in a well bore;rigging up wireline tools on a rotary floor;reeving a wireline through a wireline packoff assembly and a cable side entry sub;connecting a downhole wet connector head to tools and making up drill pipe;running an assembly containing the wireline tools to a position above the pressure isolation valve;connecting the downhole wet connector head to the wireline such that communication and power may be transmitted to or from Earth's surface;slacking off the wireline and tying the wireline to the cable side entry sub;moving the drillstring to a position that the cable side entry sub is below the rotating blow out preventer;moving the wireline into a wireline channel fabricated in the rotating blow out preventer;manipulating a sealing element in the rotating blow out preventer to separate the wireline channel from a drillstring channel;closing the seals on the wireline packoff assembly;closing the seals on the rotating blow out preventer;equalizing pressure in the drillstring channel with the pressure at the pressure isolation valve; andoperating the rotating blow out preventer with an underbalanced well. 7. The method of claim 6, further comprising using the sealing element to seal the wireline and the drillstring to pressures independent of each other. 8. The method of claim 6, wherein the downhole wet connector head is attached to a logging string. 9. The method of claim 6, wherein the wireline is sealed to pressure by a wireline lubricator and the wireline packoff assembly.