Patent ID: 7779904
Filing Date: 2010-08-24
Classification: E21B

Abstract:
1. A guide rail plate for top drive of a drilling system, including a guide rail plate consisting of 5-7 guide rail sections, characterized in that there is a boss ( 3 ) and a mated recess ( 4 ) on a surface of an upper guide rail section ( 1 ) and an opposite surface of a lower guide rail section ( 2 ) interconnected with the said upper one respectively; first hinge lugs ( 5 ) are fixed on the right and left side of both ends of the said upper guide rail section ( 1 ) respectively, and second hinge lugs are fixed on the right and left side of both ends of the said lower guide rail section ( 2 ); the first and second hinge lugs on the upper and lower guide rail sections ( 1 , 2 ) are connected by pins ( 6 ) respectively; a hydraulic cylinder ( 7 ) is centrally longitudinally fixed at the lower end of the said upper guide rail section ( 1 ); a cone plate ( 8 ) is connected to the lower end of a piston of said hydraulic cylinder ( 7 ); the right and left sides of the cone plate ( 8 ) are connected with lock shafts ( 9 ); the said lock shafts ( 9 ) are placed in corresponding transverse lock shaft holes ( 10 ) of the upper and lower guide rail sections ( 1 , 2 ); the hydraulic cylinder ( 7 ) is connected to a hydraulic pump via oil pipe, and the hydraulic pump is fixed in the lower end of the bottom guide rail section of the guide rail plate.