Method and system for deployment of tubing strings for riser-less applications

Abstract

The disclosed embodiments include a tubing deployment system. In one embodiment, the tubing deployment system includes a first tubing string having a first weightable collar. The tubing deployment system also includes a second tubing string having a second weightable collar. The first weightable collar and the second weightable collar each includes an interlocking locking member and a plurality of receivers spaced radially about an external surface of the respective weightable collar, where each of the plurality of receivers is configured to receive a weight.

What is claimed is: 
     
         1 . A tubing deployment system comprising:
 a first tubing string having a first weightable collar; and   a second tubing string having a second weightable collar,   wherein each of the first weightable collar and second weightable collar comprises:
 an interlocking member and 
 a plurality of receivers spaced radially about an external surface of the weightable collar, each of the plurality of receivers being configured to receive a weight. 
   
     
     
         2 . The system of  claim 1 , further comprising a clamping member having a fixed interface with the first tubing string, the fixed interface comprising a clamp. 
     
     
         3 . The system of  claim 1 , further comprising a clamping member having a vertically compliant interface with the second tubing string. 
     
     
         4 . The system of  claim 3 , wherein the vertically compliant interface comprises an articulated chain. 
     
     
         5 . The system of  claim 4 , wherein each link of the articulated chain comprises one or more ball bearings. 
     
     
         6 . The system of  claim 4 , wherein each link of the articulated chain comprises one or more rollers. 
     
     
         7 . The system of  claim 1 , further comprising a first deflector overlying to the plurality of receivers of the first weightable collar and coupled to the first tubing string, and a second deflector overlying to the plurality of receivers of the second weightable collar and coupled to the second tubing string. 
     
     
         8 . The system of  claim 1 , wherein the interlocking member of the first weightable collar and the interlocking member of the second weightable collar are engagable along an engagement surface to secure the interlocking member of the first weightable collar to the interlocking member of the second weightable collar. 
     
     
         9 . The system of  claim 8 , further comprising a pinned coupling, wherein the first interlocking member is secured to the second interlocking member by a shear pin. 
     
     
         10 . The system of  claim 1 , further comprising:
 a first clamping member having a fixed interface with the first tubing string, the fixed interface comprising a clamp;   a second clamping member having a vertically compliant interface with the second tubing string;   a first deflector overlying to the plurality of receivers of the first weightable collar and coupled to the first tubing string; and   a second deflector overlying to the plurality of receivers of the second weightable collar and coupled to the second tubing string,   wherein the first interlocking member of the first weightable collar extends from the first weightable collar and the interlocking member of the second weightable collar extends from the second weightable collar.   
     
     
         11 . The system of  claim 10 , further comprising a releasable coupling between the interlocking members of the first and the second weightable collars. 
     
     
         12 . A weightable collar, the weightable collar comprising:
 a hollow interior for receiving a tubing string;   an interlocking mechanism; and   a plurality of receivers spaced radially about an external surface of the weightable collar, each receiver of the plurality of receivers being configured to receive a weight.   
     
     
         13 . The weightable collar of  claim 12 , wherein the weight is radially and inwardly inserted within a receiver of the plurality of receivers. 
     
     
         14 . The weightable collar of  claim 13 , wherein the receiver comprises a securing mechanism configured to engage the inserted weight. 
     
     
         15 . The weightable collar of  claim 12 , wherein the weight is radially and downwardly inserted into one or more receivers of the plurality of receivers. 
     
     
         16 . The weightable collar of  claim 12 , wherein the interlocking mechanism is configured to engage an adjacent interlocking mechanism of an adjacent weightable collar. 
     
     
         17 . The weightable collar of  claim 16 , wherein the interlocking mechanism comprises a shear pin to engage the adjacent interlocking mechanism. 
     
     
         18 . A method of securing at least two tubing strings, the method comprising:
 attaching the first tubing string to a first weightable collar, the first weightable collar comprising an interlocking member and a plurality of receivers spaced radially about an external surface of the first weightable collar, each of the plurality of receivers being configured to receive a weight;   attaching a second tubing string to a second weightable collar, the second weightable collar comprising an interlocking member and a plurality of receivers spaced radially about an external surface of the second weightable collar, each of the plurality of receivers being configured to receive a weight;   inserting at least one weight into one or more of the plurality of receivers of the first weightable collar and the second weightable collar; and   engaging the first interlocking member with the second interlocking member.   
     
     
         19 . The method of  claim 18 , further comprising:
 engaging a first deflector to the first tubing string, the first deflector overlying to the plurality of receivers of the first weightable collar and coupled to the first tubing string; and   engaging a second deflector to the second tubing string, the second deflector overlying to the plurality of receivers of the second weightable collar and coupled to the second tubing string.   
     
     
         20 . The method of  claim 18 , wherein each of the first and second interlocking members comprises a hollow passage, and wherein engaging the first interlocking member with the second interlocking member further comprises:
 engaging the first and second interlocking members along an engagement surface to align the hollow passages of the first and second interlocking members; and   inserting a shear pin through the hollow passages of the first and second interlocking members.