Apparatus and method for conveying a tool into and/or from a well installation

1. An apparatus suitable for location on a wellhead of a well installation and for conveying a tool into and/or from the well installation, the apparatus comprising:

a conveying arrangement couplable to the tool to be conveyed and configured to mount to a housing configured to receive the tool to be conveyed into and/or from the well installation;

the conveying arrangement comprising an actuator arrangement configurable between a retracted configuration, an extended configuration and a further extended configuration to move the tool into and/from the housing and convey the tool into and/or from the well installation; and

the actuator arrangement comprising one or more actuators, each actuator comprising a housing and a piston arrangement comprising a first piston member and a second piston member carried by the first piston member, the first piston member defining a first chamber and a second chamber in the housing such that fluid in, or supplied to, the first chamber urges the first piston member towards an extended position relative to the housing,

wherein the first piston member comprises a channel for directing fluid in, or supplied to, the first chamber to the second piston member such that fluid in, or supplied to, the first chamber urges the second piston member towards the extended position relative to the first piston member.

2. The apparatus of claim 1 , wherein the apparatus is configured to convey the tool to be conveyed a distance greater than the minimum overall height of the actuator arrangement.

3. The apparatus of claim 2 , wherein the first member and the second member of each piston arrangement are telescopically arranged.

4. The apparatus of claim 1 , wherein the conveying arrangement comprises a coupling arrangement to couple the conveying arrangement to the tool to be conveyed.

5. The apparatus of claim 4 , wherein the coupling member comprises any one of or all of the following components: a yoke, a rod, a tie, and a tube.

6. The apparatus of claim 1 , further comprising a communication arrangement.

7. The apparatus of claim 6 , wherein the communication arrangement comprises a fluid communication arrangement.

8. The apparatus of claim 6 , wherein the communication arrangement comprises a control line arrangement.

9. The apparatus of claim 8 , wherein the control line arrangement comprises one or more control lines, each control line comprising a first portion and a second portion telescopically arranged relative to each other.

10. The apparatus of claim 1 , wherein the apparatus comprises, is coupled to, or is operatively associated with a fluid delivery arrangement for delivering fluid into the well installation.

11. The apparatus of claim 10 , wherein the fluid delivery arrangement comprises a fluid communication passage formed in, or disposed in, the apparatus.

12. A tool assembly comprising:

the apparatus of claim 1 ; and

a valve assembly, wherein the valve assembly comprises a subsea tree.

13. A method of conveying a tool into and/or from a well installation using the apparatus of claim 1 .

14. The method of claim 13 , comprising at least one of:

conveying the tool into the well installation by reconfiguring the actuator arrangement of the apparatus from the retracted configuration to the extended configuration;

conveying the tool into the well installation by reconfiguring the actuator arrangement of the apparatus from the extended configuration to a further extended configuration;

conveying the tool from the well installation by reconfiguring the actuator arrangement of the apparatus from the extended configuration to the retracted configuration; and

conveying the tool from the well installation by reconfiguring the actuator arrangement of the apparatus from a further extended configuration to the extended configuration.

15. The method of claim 13 , comprising at least one of:

conveying the tool into the well installation by reconfiguring the actuator arrangement of the apparatus from the extended configuration to the retracted configuration;

conveying the tool into the well installation by reconfiguring the actuator arrangement of the apparatus from a further extended configuration to the extended configuration;

conveying the tool from the well installation by reconfiguring the actuator arrangement of the apparatus from the retracted configuration to the extended configuration; and

conveying the tool from the well installation by reconfiguring the actuator arrangement of the apparatus from the extended configuration to the further extended configuration.

16. The method of claim 13 , further comprising conveying a valve assembly using the apparatus.

17. The method of claim 13 , further comprising applying a force to the tool to be conveyed or part of the tool to be conveyed, the force comprising one or both of:

a mechanical force, movement of the conveying arrangement applying the mechanical force to the tool to be conveyed or part of the tool to be conveyed; and

a pressure force.

18. The method of claim 13 , further comprising performing a fluid delivery operation in and/or on a well installation using the apparatus.