Claims
- 1. A wellhead assembly, comprising:a wellhead member having a bore and a landing shoulder located therein; a tubing hanger adapted to be connected to a string of tubing; a landing adapter mounted to the tubing hanger for axial movement relative to the tubing hanger from an extended position, while running the tubing hanger into the wellhead member, to a retracted position, the landing adapter having a shoulder that lands on the landing shoulder in the bore, the shoulder having an outer diameter that is at least equal to the outer diameter of all other portions of the landing adapter, the landing adapter having an inner portion that sealingly and slidingly engages the tubing hanger, defining a fluid chamber; and a relief passage for the fluid chamber, that relieves fluid pressure in the fluid chamber after the shoulder of the landing adapter lands on the landing shoulder, causing the tubing hanger to move downward relative to the landing adapter until the landing adapter reaches the retracted position.
- 2. The wellhead assembly according to claim 1, wherein the inner portion of the landing adapter has an upper portion located at an upper end of the landing adapter.
- 3. The wellhead assembly according to claim 1, further comprising a seal located on the inner portion of the landing adapter for sealingly engaging the tubing hanger, the seal being located adjacent an upper end of the inner portion.
- 4. The wellhead assembly according to claim 1, wherein:the tubing hanger has an upper cylindrical surface and a lower cylindrical surface separated by a downward facing surface that is stationary relative to the tubing hanger; and the inner portion of the landing adapter engages the upper and lower cylindrical surfaces and has an upward facing portion that contacts the downward facing surface while in the retracted position.
- 5. The wellhead assembly according to claim 1, wherein:the tubing hanger has a cylindrical surface; the tubing hanger has a ring stationarily mounted thereto at an upper end of the cylindrical surface; the inner portion of the landing adapter comprises a first portion that sealingly engages the cylindrical surface of the tubing hanger and a second portion that sealingly engages an outer diameter of the ring; and the landing adapter has a portion that contacts a lower side of the ring while in the retracted position.
- 6. The wellhead assembly according to claim 5, further comprising a seal on an inner diameter of the ring that seals the ring to the tubing hanger.
- 7. A wellhead assembly, comprising:a tubing hanger adapted to be connected to a string of tubing, the tubing hanger having an upper cylindrical surface and a lower cylindrical surface of lesser diameter than the upper cylindrical surface, defining a downward facing surface at a junction of the cylindrical surfaces that is stationary relative to the tubing hanger; a landing adapter mounted to the tubing hanger for axial movement relative to the tubing hanger from an extended position, while running the tubing hanger into the wellhead member, to a retracted position, the landing adapter having a shoulder adapted to land on a landing shoulder in a bore of a wellhead member; the landing adapter having a first inner portion that sealingly and slidingly engages the upper cylindrical surface of the tubing hanger; the landing adapter having a second inner portion that sealingly and slidingly engages the lower cylindrical surface of the tubing hanger, defining a fluid chamber; the landing adapter having an upward facing portion that contacts the downward facing surface while in the retracted position; and a relief passage for the fluid chamber for relieving fluid pressure in the fluid chamber after the landing adapter lands on the landing shoulder in the bore, allowing the tubing hanger to move downward relative to the landing adapter until the landing adapter reaches the retracted position.
- 8. The wellhead assembly according to claim 7, wherein the first inner portion is located at an upper end of the landing adapter.
- 9. The wellhead assembly according to claim 7, wherein the landing adapter has a maximum outer diameter, and wherein the shoulder has a diameter that is not less than the maximum outer diameter.
- 10. A wellhead assembly, comprising:a wellhead member having a bore; a landing adapter mounted in the bore of the wellhead member for axial movement relative to the wellhead member between upper and lower positions, the landing adapter having a landing shoulder; the landing adapter having an exterior portion that sealing engages the bore of the wellhead member, defining a fluid chamber between the landing adapter and the bore; a tubing hanger adapted to be connected to a string of tubing and having a shoulder that lands on the landing shoulder of the landing adapter while the landing adapter is in the upper position; and a relief passage in the wellhead member leading to the fluid chamber for relieving fluid pressure in the fluid chamber after the tubing hanger lands on the landing adapter, causing the landing adapter and the tubing hanger to move downward until the landing adapter reaches the lower position.
- 11. The wellhead assembly according to claim 10, wherein the relief passage supplies hydraulic fluid pressure to maintain the landing adapter in the upper position prior to the shoulder of the tubing hanger landing on the landing shoulder of the landing adapter.
- 12. The wellhead assembly according to claim 10, wherein the bore has an upper cylindrical portion and a lower cylindrical portion of lesser inner diameter than the upper cylindrical portion, and wherein the landing adapter sealingly engages the upper and lower cylindrical portions to define the fluid chamber.
Parent Case Info
This patent application is based upon U.S. provisional patent application Ser. No. 60/232,011, filed Sep. 12, 2000.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
Patent Application Filed Aug. 22, 2001 entitled “Running Tool for Soft Land a Tubing Hanger in a Wellhead Housing”. |
Provisional Applications (1)
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Number |
Date |
Country |
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60/232011 |
Sep 2000 |
US |