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The invention provides a bore protector for a tubing hanger, the bore protector is to be arranged in a tubing hanger in a spool in a subsea production Xmas tree for through tubing rotary drilling (TTRD) in an existing production well. The bore protector is distinctive in that it comprises a means to

The invention provides a bore protector for a tubing hanger, the bore protector is to be arranged in a tubing hanger in a spool in a subsea production Xmas tree for through tubing rotary drilling (TTRD) in an existing production well. The bore protector is distinctive in that it comprises a means to be releasably fastened in at least one of: the spool in the Xmas tree and the tubing hanger, and a wear sleeve extending down into the tubing hanger, covering the tubing hanger sealing surfaces for the tubing hanger plugs, the wear sleeve comprises a shoulder at or near an upper end, the shoulder is arranged on a below positioned seat of a main part of the bore protector, in which position the wear sleeve is releasably fastened.

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1. A bore protector arranged in a tubing hanger within a spool of a subsea production Xmas tree for through tubing rotary drilling (TTRD) in an existing production well, the bore protector comprising: a means to be releasably fastened in at least one of: the spool of the Xmas tree and the tubing han

1. A bore protector arranged in a tubing hanger within a spool of a subsea production Xmas tree for through tubing rotary drilling (TTRD) in an existing production well, the bore protector comprising: a means to be releasably fastened in at least one of: the spool of the Xmas tree and the tubing hanger; anda wear sleeve extending down into the tubing hanger, covering tubing hanger sealing surfaces for tubing hanger plugs, the wear sleeve comprising a shoulder at or near an upper end, the shoulder arranged on a below positioned seat of a main part of the bore protector, in which position the wear sleeve shoulder is releasably fastened to the seat. 2. The bore protector according to claim 1, wherein the bore protector comprises a split lock ring that is expandable for locking to a spool bore. 3. The bore protector according to claim 1, wherein the wear sleeve is releasably fastened with bolts to a main part of the bore protector. 4. The bore protector according to claim 1, wherein the bore protector comprises a seat or a shoulder for hanging up a drill string. 5. The bore protector according to claim 1, comprising means for facilitating pressure testing, the means for facilitating comprising at least one of seal elements and seats functioning to reduce a volume required to pressurise for said pressure testing. 6. The bore protector according to claim 1, wherein a geometry and a dimension of an outer structure is adapted to standard Xmas tree geometry and dimension. 7. The bore protector according to claim 1, wherein a geometry and a dimension of a lower part of the wear sleeve is adapted to a geometry and a dimension of the tubing hanger. 8. The bore protector according to claim 1, wherein the wear sleeve comprises a wear indicator. 9. Use of a bore protector according to claim 1, for protecting the tubing hanger sealing surfaces for the tubing hanger plugs when performing through tubing rotary drilling.