Landing string assembly

Abstract

A landing string assembly ( 10 ) comprises a first end ( 12 ) adapted to be coupled to a wellhead assembly ( 14 ), a second end ( 16 ) adapted to be located relative to a surface platform ( 18 ), and a pump ( 34 ) mounted intermediate the first and second ends ( 12, 16 ). In one disclosed embodiment the pump ( 34 ) is located adjacent the first end ( 12 ), and the string assembly ( 10 ) is configured for use in deepwater applications.

1 . A landing string assembly comprising:
 a first end adapted to be coupled to a wellhead assembly;   a second end adapted to be located relative to a surface platform; and   a pump mounted intermediate the first and second ends.   
     
     
         2 . The assembly according to  claim 1 , wherein, when in normal use, the first end defines a lower end of the landing string assembly, and the second end defines an upper end of the landing string assembly. 
     
     
         3 . The assembly according to  claim 1 , wherein the pump is configured to pump fluids to and/or from a well. 
     
     
         4 . The assembly according to  claim 1 , configurable for temporary use. 
     
     
         5 . The assembly according to  claim 1 , adapted for use in at least one of well testing operations, production operations, intervention operations, deployment operations, well kill and abandoning operations. 
     
     
         6 . The assembly according to  claim 1 , adapted to extend through a riser. 
     
     
         7 . The assembly according to  claim 1 , comprising a plurality of tubular members secured together. 
     
     
         8 . The assembly according to  claim 7 , wherein the pump is mounted at least one of within a tubular member and intermediate two tubular members. 
     
     
         9 . The assembly according to  claim 1 , wherein the pump is located nearer to the first end than the second end. 
     
     
         10 . The assembly according to  claim 1 , wherein the pump is located adjacent the first end of the landing string assembly. 
     
     
         11 . The assembly according to  claim 1 , wherein the pump is adapted to be powered from surface level by at least one of electrical power, hydraulic power, mechanical work and pneumatic power. 
     
     
         12 . The assembly according to  claim 1 , wherein the first end is adapted to be directly coupled to a wellhead assembly. 
     
     
         13 . The assembly according to  claim 1 , wherein the first end comprises a connecting arrangement adapted to permit the landing string assembly to be coupled to a wellhead assembly, either directly or indirectly. 
     
     
         14 . The assembly according to  claim 13 , wherein the connecting arrangement comprises a releasable connecting arrangement. 
     
     
         15 . The assembly according to  claim 1 , wherein at least a portion of the landing string assembly is configured to be releasable from a wellhead assembly. 
     
     
         16 . The assembly according to  claim 1 , wherein the entire landing string assembly is configured to be releasable from a wellhead assembly. 
     
     
         17 . The assembly according to  claim 1 , wherein the wellhead assembly comprises a subsea wellhead assembly. 
     
     
         18 . The assembly according to  claim 1 , wherein the wellhead assembly comprises a fluid control assembly, such as at least one of a blow out preventor, a Xmas tree, such as a horizontal or vertical Xmas tree and a test tree. 
     
     
         19 . The assembly according to  claim 1 , comprising components arranged to form part of a wellhead assembly. 
     
     
         20 . The assembly according to  claim 19 , comprising a subsea test tree located adjacent the first end of the landing string assembly. 
     
     
         21 . The assembly according to  claim 20 , wherein the subsea test tree is configured to be releasably secured to the landing string assembly. 
     
     
         22 . The assembly according to  claim 1 , comprising a tubing hanger arranged to support a tubing string extending into an associated well. 
     
     
         23 . The assembly according to  claim 22 , wherein the tubing hanger is configured to be releasable from the landing string. 
     
     
         24 . The assembly according to  claim 1 , comprising a valve assembly. 
     
     
         25 . The assembly according to  claim 24 , wherein the valve assembly is located adjacent the first end of the landing string assembly. 
     
     
         26 . The assembly according to  claim 24 , wherein the valve assembly is configured to isolate the landing string assembly in the event of disconnection from the wellhead assembly. 
     
     
         27 . The assembly according to  claim 24 , wherein the valve assembly is located below the pump. 
     
     
         28 . The assembly according to  claim 1 , comprising a lubricator valve assembly configured to permit the passage of tooling and the like into the landing string. 
     
     
         29 . The assembly according to  claim 28 , wherein the lubricator valve is located more towards the second end than the first end. 
     
     
         30 . The assembly according to  claim 1 , configured to be coupled to a wellhead assembly comprising a blow out Preventor (BOP), wherein the pump is positioned within the landing string assembly to be located above the BOP. 
     
     
         31 . The assembly according to  claim 1 , wherein the second end is adapted to be coupled at the location of a surface platform. 
     
     
         32 . The assembly according to  claim 1 , adapted to communicate with a downhole tubing string extending downhole from an associated wellhead assembly. 
     
     
         33 . A method of establishing a flow path between a wellhead assembly and a surface platform, said method comprising the steps of:
 incorporating a pump intermediate first and second ends of a landing string assembly;   coupling the first end of the landing string assembly to a wellhead assembly; and   locating the second end of the landing string assembly relative to a surface platform.   
     
     
         34 . A well construction comprising:
 a wellhead assembly; and   a landing string having a first end coupled to the wellhead assembly and a second end secured relative to a surface platform, wherein the landing string comprises a pump located intermediate the first and second ends.   
     
     
         35 . A deepwater landing string assembly comprising:
 a first end adapted to be coupled to a wellhead assembly;   a second end adapted to be located relative to a surface platform; and   a pump mounted intermediate the first and second ends.