Petroleum instrument salvaging system and salvaging head

Abstract

The present invention discloses a salvaging head for a petroleum instrument salvaging system, which comprises: a lifting part, for connecting a lifting rope; an insertion rod, which is located under the lifting part and used for protruding into a stair-shaped salvaging hole, and is set with a notch on both sides of the free end thereof; two clamping pieces, which are respectively hinged in two notches, and the clamping face thereof can be in hooking fit with a hooking face in the horizontal plane, wherein the hinge part of the two clamping pieces is located on one end thereof, and the other end is set with a pulling rope, wherein the pulling rope is strained gradually as the clamping face rotates to the horizontal plane, and the orientations of the other ends, which are connected with the pulling rope, of the two clamping pieces are opposite to each other; a compression spring, which is set between the other end of each clamping piece and the sidewall of the corresponding notch, for applying a restoring force that makes the clamping face of the clamping piece in the horizontal plane. The invention further discloses a petroleum instrument salvaging system. By the above solutions, the current problems of large labor intensity, low efficiency, high cost and large economic loss caused by salvaging a petroleum instrument via pulling drill rods out of the drilling well can be solved.

1 . A salvaging head ( 2 ) for a petroleum instrument salvaging system, which is used for the salvaging of a petroleum instrument ( 1 ), wherein the petroleum instrument ( 1 ) has a stair-shaped salvaging hole ( 11 ), and the stair face of the stair-shaped salvaging hole ( 11 ) is a hooking face ( 112 ); wherein, the salvaging head comprises:
 a lifting part ( 21 ), for connecting a lifting rope;   an insertion rod ( 22 ), which is located under the lifting part ( 21 ) and used for protruding into the stair-shaped salvaging hole ( 11 ), and is set with a notch ( 26 ) on both sides of the free end thereof;   two clamping pieces ( 28 ,  210 ), which are respectively hinged in the two notches ( 26 ), and the clamping face can be in hooking fit with the hooking face ( 112 ) in the horizontal plane, and the hinge part of the two clamping pieces ( 28 ,  210 ) is located on one end thereof, and the other end is set with a pulling rope ( 25 ,  24 ), wherein the pulling rope ( 25  or  24 ) is strained gradually as the clamping face ( 281 ) rotates to the horizontal plane, and the orientations of the other ends, which are connected with the pulling rope ( 25  or  24 ), of the two clamping pieces ( 28 ,  210 ) are opposite to each other; and   a compression spring ( 27 ), which are set between the other end of each clamping piece ( 28  or  210 ) and the sidewall of the corresponding notch ( 26 ), for applying a restoring force that makes the clamping face ( 281 ) of the clamping piece ( 28  or  210 ) in the horizontal plane.   
     
     
         2 . The salvaging head ( 2 ) according to  claim 1 , wherein, an intermediate jointing part ( 29 ) is further included between the lifting part ( 21 ) and the insertion rod ( 22 ); and
 the cross-sectional areas of the lifting part ( 21 ), the intermediate jointing part ( 29 ) and the insertion rod ( 22 ) decreases gradually to form a stair-shaped structure.   
     
     
         3 . The salvaging head ( 2 ) according to  claim 2 , wherein, the lifting part ( 21 ), the intermediate jointing part ( 29 ) and the insertion rod ( 22 ) form an integral structure. 
     
     
         4 . The salvaging head ( 2 ) according to  claim 2  or  3 , wherein, the intermediate jointing part ( 29 ) is set with a first through hole ( 291 ) and a second through hole ( 292 ), and the first through hole ( 291 ) and the second through hole ( 292 ) intersect with each other; and
 the first through hole ( 291 ) is set with a cross rod ( 23 ) that traverses the intermediate jointing part ( 29 ), and the pulling rope ( 25  or  24 ) passes through the openings of the second through hole ( 292 ) that are located on the same side and is connected fixedly with the cross rod ( 23 ), and the cross rod ( 23 ) can be in stopping fit with the entrance end of the stair-shaped salvaging hole ( 11 ). 
 
     
     
         5 . The salvaging head ( 2 ) according to  claim 1 , wherein, the sidewall of the notch ( 26 ) is set with a through hole ( 221 ) that extends to the surface of the insertion rod ( 22 ), and one end of the pulling rope ( 25  or  24 ) that is connected with the clamping piece ( 28  or  210 ) passes through the through hole ( 221 ). 
     
     
         6 . The salvaging head ( 2 ) according to  claim 1 ,  2 ,  3  or  5 , wherein, the free end of the insertion rod ( 22 ) has a coniform insertion head ( 222 ). 
     
     
         7 . The salvaging head ( 2 ) according to  claim 1 , wherein, the surface of the lifting part ( 21 ) is set with a plurality of crash-proof strips ( 211 ) that are distributed circumferentially;
 the two ends of the crash-proof strip ( 211 ) are fixed on the lifting part ( 21 ), and the part of the crash-proof strip ( 211 ), which is located between the two ends thereof, and the surface of the lifting part ( 21 ) form a buffer clearance ( 212 ).   
     
     
         8 . The salvaging head ( 2 ) according to  claim 7 , wherein, the crash-proof strip ( 211 ) is a beryllium copper crash-proof strip. 
     
     
         9 . A petroleum instrument salvaging system, comprising: a rope winder ( 3 ), a lifting rope ( 4 ) and a salvaging head ( 2 ); wherein, one end of the lifting rope ( 4 ) is wound on the rope winder ( 3 ), and the other end is connected with the salvaging head ( 2 ); wherein:
 the salvaging head ( 2 ) is the salvaging head ( 2 ) according to any one of the above  claim 1 - 3 ,  5 , or  7 .   
     
     
         10 . A petroleum instrument salvaging system, comprising: a rope winder ( 3 ), a lifting rope ( 4 ) and a salvaging head ( 2 ); wherein, one end of the lifting rope ( 4 ) is wound on the rope winder ( 3 ), and the other end is connected with the salvaging head ( 2 ); wherein:
 the salvaging head ( 2 ) is the salvaging head ( 2 ) according to any one of the above  claim 1 - 3 ,  5 , or  7 , and further wherein, the lifting rope ( 4 ) is a nylon rope.