Threaded connection for hammering interconnected tubular members

A threaded connection for hammering interconnected tubular members into a ground that comprises onshore land or offshore seabed for exploration and production of a hydrocarbon well, comprising:

• a pin member comprising an external shoulder, a pin nose, a tapered pin threaded portion located between the external shoulder and the pin nose, and a sealing surface located between the pin nose and the pin threaded portion;
• a box member comprising an internal shoulder, a box nose, a tapered box threaded portion located between the internal shoulder and the box nose, and an elastomeric sealing member located between the internal shoulder and the box threaded portion, where
• the pin threaded portion and the box threaded portion are configured to engage each other during rotational make-up of the threaded connection,
• the pin threaded portion and the box threaded portion comprise hooked threads providing radial interference between at least one of (1) crests of the pin threaded portion and roots of the box threaded portion or (2) crests of the box threaded portion and roots of the pin threaded portion, at final make-up of the threaded connection, wherein the hooked threads comprise a positive stab flank angle and a negative load flank angle,
• facing load flanks of the hooked threads of the pin threaded portion and the box threaded portion are in contact with each other at final make-up of the threaded connection,
• facing stab flanks of the hooked threads of the pin threaded portion and the box threaded portion are located at a flank distance from each other at final make-up of the threaded connection,
• the sealing surface and the elastomeric sealing member are configured to form a radial seal at final make-up of the threaded connection,
• the box nose is in contact with the external shoulder at final make-up of the threaded connection,
• the pin nose is located at a shoulder distance from the internal shoulder at final make-up of the threaded connection, and
• wherein the threaded connection comprises at least one anti-rotational key and at least one key slot configured to receive the anti-rotational key in a locking position in which at least part of the anti-rotational key extends between the pin member and the box member to prevent rotational movement of the pin member and the box member relative to each other at final make-up of the threaded connection.

A threaded connection for hammering interconnected tubular members into a ground that comprises onshore land or offshore seabed for exploration and production of a hydrocarbon well, comprising:

• a pin member comprising an external shoulder, a pin nose, a tapered pin threaded portion located between the external shoulder and the pin nose, and a sealing surface located between the pin nose and the pin threaded portion;
• a box member comprising an internal shoulder, a box nose, a tapered box threaded portion located between the internal shoulder and the box nose, and an elastomeric sealing member located between the internal shoulder and the box threaded portion, where
• the pin threaded portion and the box threaded portion are configured to engage each other during rotational make-up of the threaded connection,
• the pin threaded portion and the box threaded portion comprise hooked threads providing radial interference between at least one of (1) crests of the pin threaded portion and roots of the box threaded portion or (2) crests of the box threaded portion and roots of the pin threaded portion, at final make-up of the threaded connection, wherein the hooked threads comprise a positive stab flank angle and a negative load flank angle,
• facing load flanks of the hooked threads of the pin threaded portion and the box threaded portion are in contact with each other at final make-up of the threaded connection,
• facing stab flanks of the hooked threads of the pin threaded portion and the box threaded portion are located at a flank distance from each other at final make-up of the threaded connection,
• the sealing surface and the elastomeric sealing member are configured to form a radial seal at final make-up of the threaded connection,
• the box nose is in contact with the external shoulder at final make-up of the threaded connection, and
• the pin nose is located at a shoulder distance from the internal shoulder at final make-up of the threaded connection, and
• wherein the threaded connection is at final make-up free from any radial seal provided between the external shoulder and the engaged pin threaded portion and box threaded portion.

A threaded connection for hammering interconnected tubular members into a ground that comprises onshore land or offshore seabed for exploration and production of a hydrocarbon well, comprising:

• a pin member comprising:
• an external shoulder;
• a pin nose;
• a tapered pin threaded portion located between the external shoulder and the pin nose;
• a sealing surface located between the pin nose and the pin threaded portion;
• a pin pipe part having a pin pipe part outer surface located at a pin pipe part outer surface radius (R2) from a central axis of the threaded connection;
• a pin member shoulder section which forms the external shoulder and is located between the pin pipe part and the pin threaded portion;
• and
• a pin connector part extending from the pin member shoulder section until the pin nose;
• a box member comprising:
• an internal shoulder;
• a box nose;
• a tapered box threaded portion located between the internal shoulder and the box nose;
• an elastomeric sealing member located between the internal shoulder and the box threaded portion;
• a box pipe part having a box pipe part outer surface located at a box pipe part outer surface radius (R3) from the central axis;
• a box member shoulder section which forms the internal shoulder and is located between the box pipe part and the box threaded portion;
• and
• a box connector part extending from the box member shoulder section until the box nose;
• wherein the pin threaded portion and the box threaded portion are configured to engage each other during rotational make-up of the threaded connection,
• the pin threaded portion and the box threaded portion comprise hooked threads providing radial interference between at least one of (1) crests of the pin threaded portion and roots of the box threaded portion or (2) crests of the box threaded portion and roots of the pin threaded portion, at final make-up of the threaded connection, wherein the hooked threads comprise a positive stab flank angle and a negative load flank angle,
• facing load flanks of the hooked threads of the pin threaded portion and the box threaded portion are in contact with each other at final make-up of the threaded connection,
• facing stab flanks of the hooked threads of the pin threaded portion and the box threaded portion are located at a flank distance from each other at final make-up of the threaded connection,
• the sealing surface and the elastomeric sealing member are configured to form a radial seal at final make-up of the threaded connection,
• the box nose is in contact with the external shoulder at final make-up of the threaded connection,
• the pin nose is located at a shoulder distance from the internal shoulder at final make-up of the threaded connection,
• at final make-up, the pin connector part and the box connector part define together an outer connector surface located at an outer connector radius (R4) from the central axis, and
• the outer connector radius (R4) is larger than each of the pin pipe part outer surface radius (R2) and the box pipe part outer surface radius (R3).

A method of hammering a string of interconnected tubular members into a ground, the method comprising:

• forming a threaded connection by causing relative rotation of a pin member and a box member, wherein:
• the pin member comprises an external shoulder, a pin nose, a tapered pin threaded portion located between the external shoulder and the pin nose, and a sealing surface located between the pin nose and the pin threaded portion;
• and
• the box member comprises an internal shoulder, a box nose, a tapered box threaded portion located between the internal shoulder and the box nose, and an elastomeric sealing member located between the internal shoulder and the box threaded portion;
• the pin threaded portion and the box threaded portion comprise hooked threads with a positive stab flank angle and a negative load flank angle;
• and
• the relative rotation causes the pin threaded portion and the box threaded portion to engage each other;
• continuing the relative rotation of the pin member and box member until final make-up of the threaded connection, at which point:
• the pin threaded portion and the box threaded portion provide radial interference between at least one of (1) crests of the pin threaded portion and roots of the box threaded portion or (2) crests of the box threaded portion and roots of the pin threaded portion;
• facing load flanks of the hooked threads of the pin threaded portion and the box threaded portion are in contact with each other;
• facing stab flanks of the hooked threads of the pin threaded portion and the box threaded portion are located at a flank distance from each other;
• the sealing surface and the elastomeric sealing member form a radial seal;
• the box nose is in contact with the external shoulder;
• the pin nose is located at a shoulder distance from the internal shoulder;
• and
• the elastomeric sealing member is spaced apart from the tapered pin threaded portion;
• and
• hammering the threaded connection into the ground.