Heavy-load landing string system

Abstract

A tubular handling system includes a slip apparatus, a high capacity landing string and high capacity elevator bushings.

1 . A system for landing tubular goods comprising: 
 a. a plurality of pipe sections having a first and second end, wherein each pipe section comprises: 
 i a threaded male connection disposed at said first end;  
 ii a threaded female connection having an outer diameter disposed at said second end;  
 iii a tubular body having an outer diameter disposed between said threaded connections, wherein the outer diameter of said threaded female connection is greater than the outer diameter of said tubular body; and  
 iv a tapered shoulder between said threaded female connection and said tubular body, wherein the angle of said taper is in the range between 18 degrees and 90 degrees.  
   b. a slip apparatus having a tapered outer surface;    c. a slip bowl insert having a tapered inner surface, wherein the taper angle of said inner surface is substantially equal to the taper angle of said outer surface of said slip apparatus; and    c. elevators having a top, a bottom and a tapered shoulder, wherein the angle of said tapered shoulder is in the range between 18 and 90 degrees, and is substantially equal to angle of the tapered shoulder of said pipe sections.    
   
   
       2 . The system of  claim 1 , wherein the angle of the tapered shoulder of said pipe sections is 45 degrees.  
   
   
       3 . The system of  claim 1 , wherein the angle of the tapered surface of said elevators is 45 degrees.  
   
   
       4 . The system of  claim 1 , wherein said tapered surface of said elevators is situated near the top of said elevators.  
   
   
       5 . The system of  claim 1 , wherein said tubular body further comprises a thick-walled section disposed adjacent to said tapered shoulder.  
   
   
       6 . The system of  claim 5 , wherein the length of said thick-walled section is about 6 feet.  
   
   
       7 . The system of  claim 1 , wherein said slip bowl insert has a continuous inner surface.  
   
   
       8 . The system of  claim 1 , wherein said slip apparatus further comprises: 
 a. a first slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle in a range between 11 and 15 degrees;    b. a second slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle that is substantially equal to the taper angle of the outer face of said first slip segment;    c. a third slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle that is substantially equal to the taper angle of the outer face of said first and second slip segments;    d. means for attaching said first slip segment with said second slip segment; and    e. means for attaching said second slip segment with said third slip segment.    
   
   
       9 . The system of  claim 7 , wherein the length of said first, second and third slip segments are at least 20 inches.  
   
   
       10 . The system of  claim 7 , wherein the taper angle of the outer faces of said first, second and third slip segments are about 12 degrees.  
   
   
       11 . The system of  claim 9 , wherein the taper angle of the inner surface of the slip bowl insert is about 12 degrees.  
   
   
       12 . A landing string comprising a plurality of pipe sections having first and second ends, said pipe sections further comprising: 
 a. a threaded male connection disposed at said first end of each pipe section;    b. a threaded female connection having an outer diameter disposed at said second end of each pipe section;    c. a tubular body having an outer diameter disposed between said threaded connections, wherein the outer diameter of said threaded female connection is greater than the outer diameter of said tubular body; and    d. a tapered shoulder between said threaded female connection and said tubular body, wherein the angle of said taper is in the range between 18 degrees and 90 degrees.    
   
   
       13 . The system of  claim 12 , wherein the angle of the tapered shoulder of said pipe sections is 45 degrees.  
   
   
       14 . The system of  claim 12 , wherein said tubular body further comprises a thick-walled section disposed adjacent to said tapered shoulder.  
   
   
       15 . The system of  claim 14 , wherein the length of said thick-walled section is about 6 feet.  
   
   
       16 . A slip system comprising: 
 a. a slip apparatus having a tapered outer surface; and    b. a slip bowl insert having a tapered inner surface, wherein the taper angle of said inner surface is substantially equal to the taper angle of said outer surface of said slip apparatus.    
   
   
       17 . The slip system of  claim 16  further comprising: 
 a. a first slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle in a range between 11 and 15 degrees;    b. a second slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle that is substantially equal to the taper angle of the outer face of said first slip segment;    c. a third slip segment having an arcuate inner face and a tapered outer face, wherein said outer face has a taper angle that is substantially equal to the taper angle of the outer face of said first and second slip segments;    d. means for attaching said first slip segment with said second slip segment; and    e. means for attaching said second slip segment with said third slip segment.    
   
   
       18 . The system of  claim 17 , wherein the length of said first, second and third slip segments are at least 20 inches.  
   
   
       19 . The system of  claim 17 , wherein the taper angle of the outer faces of said first, second and third slip segments are about 12 degrees.  
   
   
       20 . The system of  claim 19 , wherein the taper angle of the inner surface of the slip bowl insert is about 12 degrees.  
   
   
       21 . The slip system of  claim 16 , wherein said slip bowl insert has a continuous inner surface.  
   
   
       22 . Landing string elevators comprising a top, a bottom and a tapered shoulder, wherein the taper angle of said tapered shoulder is in the range between 18 and 90 degrees.  
   
   
       23 . The elevators of  claim 22 , wherein the angle of the tapered shoulder of said elevators is 45 degrees.  
   
   
       24 . The elevators of  claim 22 , wherein said tapered shoulder of said elevators is situated near the top of said elevators.