Well intervention apparatus and method
Well intervention apparatus is provided, the well intervention apparatus including a flexible hose to be lowered into a well, a stuffing seal which engages around the hose during lowering, at least one tool provided at a downhole end portion of the hose, and a plurality of individual tubes extending along an inside region of the hose and connecting to the at least one tool, each individual tube providing a fluid path for fluid communication between outside of the well and the at least one tool inside the well, and each individual tube being laterally supported in said inside region such that its lateral movement is restricted.
1. A well intervention apparatus comprising a flexible hose to be lowered into a well, a stuffing seal which engages around the hose during lowering, at least one tool provided at a downhole end portion of the hose, a plurality of individual tubes extending along an inside region of the hose and connecting to the at least one tool, each individual tube providing a fluid path for fluid communication between outside of the well and the at least one tool inside the well, and each individual tube being laterally supported in said inside region such that its lateral movement is restricted; and
a bottom hole assembly disposed at the downhole end portion of the hose, said bottom hole assembly having a sealing arrangement that includes a seal disposed around the downhole end portion of the hose, and a pair of wedge members, each wedge member extending a circumferential distance around the hose, wherein the sealing arrangement is configured so that the wedge members compress the seal into sealing engagement with the hose.
2. The well intervention apparatus of claim 1 , comprising a flexible material in the inside region to provide said lateral support to the individual tubes.
3. The well intervention apparatus of claim 1 , wherein the bottom hole assembly comprises a termination assembly for the hose.
4. The well intervention apparatus of claim 3 , wherein the hose extends into a body of the termination assembly, and the seal around the downhole end portion of the hose is provided in a cavity in the body of the termination assembly.
5. The well intervention apparatus of claim 4 , wherein the seal is compressed between the outside of the hose and the body of the termination assembly, and wherein the body of the termination assembly extends circumferentially around the hose.
6. The well intervention apparatus of claim 5 , wherein the pair of wedge members are axially movable and each wedge member is configured so that when the respective wedge member is moved axially towards the seal, the seal is caused to engage in sealing manner between the outside of the hose and the body.
7. The well intervention apparatus of claim 3 , wherein the inside region of the hose is open to a chamber in the bottom hole assembly, the chamber being sealed from the outside.
8. The well intervention apparatus of claim 7 , wherein the chamber is formed in the termination assembly of the bottom hole assembly, and wherein the chamber is sealed from above by the seal around the hose and sealed from below by a second seal.
9. The well intervention apparatus of claim 7 , comprising a connector in said chamber for connecting a continuation tube to one of said individual tubes, the continuation tube extending to the at least one tool.
10. The well intervention apparatus of claim 3 , wherein the termination assembly is removably connected to the at least one tool.
11. The well intervention apparatus of claim 1 , comprising at least two tools at the downhole end portion of the hose, a said individual tube providing a fluid path for fluid communication between outside of the well and a first one of said at least two tools, and a said individual tube providing for fluid communication between outside of the well and a second one of said at least two tools.
12. The well intervention apparatus of claim 1 , further comprising at least one second individual tube in the form of an electrical cable.
13. The well intervention apparatus of claim 1 , wherein the sealing arrangement further comprises a second seal, a first ring member, and a second ring member;
wherein the first ring member is disposed between the wedge members and the second seal, and the second ring member is disposed between the second seal and the seal.
14. A method of well intervention comprising lowering a flexible hose into a well through a stuffing seal which engages around the hose during lowering, at least one tool being provided at a downhole end portion of the hose, and a plurality of individual tubes extending along an inside region of the hose and connecting to the at least one tool, each individual tube providing a fluid path for fluid communication between outside of the well and the at least one tool inside the well, and each individual tube being laterally supported in said inside region such that its lateral movement is restricted;
wherein the flexible hose includes a bottom hole assembly disposed at the downhole end portion of the hose, and the bottom hole assembly has a sealing arrangement that includes a seal disposed around the downhole end portion of the hose and a pair of wedge members, each wedge member extending a circumferential distance around the hose, wherein the sealing arrangement is configured so that the wedge members compress the seal into sealing engagement with the hose.
15. The method of claim 14 , wherein flexible material is provided in the inside region of the hose to provide said lateral support to the individual tubes.
16. The method of claim 14 , comprising carrying out a plurality of operations using the at least one tool.
17. The method of claim 16 , comprising carrying out a first of said plurality of operations using a first one of said individual tubes for fluid communication, and carrying out a second of said plurality of operations using a second one of said individual tubes for fluid communication.
18. The method of claim 16 , comprising lowering the flexible hose once to perform said plurality of operations using the at least one tool, and then raising the flexible hose.
19. The method of claim 14 , wherein the well is a non-subsea well.