Device for connecting electrical lines for boring and production installations

1. A device for connecting electrical lines to essentially tubular connecting elements ( 1 , 2 ) of drill pipes ( 32 ), said connecting elements configured to be screwed to one another,

characterized in that on one connecting element ( 1 ), a first electrical contact element ( 10 ) is located and movable in a direction of rotation of the one connecting element ( 1 ), and

on an other connecting element ( 2 ), a second electrical contact element ( 23 ) is located in a fixed manner,

wherein the movable first electrical contact element ( 10 ) is located on a ring ( 9 ) that is pivotable on the one connecting element ( 1 ).

2. The device according to claim 1 , wherein the ring ( 9 ) is an outer ring of a slip ring ( 3 ).

3. The device according to claim 1 , wherein in the one and the other connecting elements ( 1 , 2 ), there are bores ( 26 , 27 , 29 ) through which the electrical lines lead.

4. The device according to claim 1 , wherein a carrier frequency system is connected to the electrical lines.

5. The device according to claim 1 , wherein the contact element ( 10 ) on the ring ( 9 ) is at least one contact pin that projects in an axial direction from the ring ( 9 ).

6. The device according to claim 1 , wherein the second electrical contact element ( 23 ) located in a fixed manner is a contact bushing that has a seal ( 25 ) on a side facing the movable first electrical contact element ( 10 ).

7. The device according to claim 6 , wherein the seal ( 16 , 25 ) is a seal that can be perforated.

8. The device according to claim 1 , wherein the movable first electrical contact element ( 10 ) on the ring ( 9 ) is at least one contact pin that projects in an axial direction from the ring ( 9 ).

9. The device according to claim 8 , wherein in the axial direction of the ring ( 9 ), there is a catch ring ( 4 ) that has a through opening ( 11 ) for the contact pin ( 10 ).

10. The device according to claim 9 , wherein the catch ring ( 4 ) has a elastically supported catch pin ( 15 ) configured to engage a catch opening ( 22 ) on the other connecting element ( 2 ).

11. The device according to claim 10 , wherein the catch ring ( 4 ) is movable relative to the slip ring ( 2 ) in a lengthwise direction of the contact pin ( 15 ).

12. The device according to claim 9 , wherein the catch ring ( 4 ) is movable relative to the slip ring ( 2 ) in a lengthwise direction of the contact pin ( 15 ).

13. The device according to claim 12 , wherein the catch ring ( 4 ) is movable from a first position in which a tip of the contact pin ( 10 ) lies within the catch ring ( 4 ) into a second position in which the tip of the contact pin ( 10 ) lies outside of the catch ring ( 4 ).

14. The device according to claim 13 , wherein the catch ring ( 4 ) is pressed by at least one spring ( 13 ) from a first position in the lengthwise direction to a second position.

15. The device according to claim 12 , wherein the catch ring ( 4 ) is pressed by at least one spring ( 13 ) from a first position in the lengthwise direction to a second position.

16. The device according to claim 9 , wherein the through opening ( 11 ) has a seal ( 16 ) on a side facing away from the slip ring ( 2 ).

17. The device according to claim 16 , wherein the seal ( 16 , 25 ) is a seal that can be perforated.

18. The device according to claim 17 , wherein the seal is a rubber seal.

19. The device according to claim 9 , wherein the ring ( 9 ) and the catch ring ( 4 ) are surrounded by an outer ring ( 5 ).

20. The device according to claim 19 , wherein the outer ring ( 5 ) has an outside diameter that is greater than an outside diameter of the one and the other connecting elements ( 1 , 2 ).