Device for inserting tubular members together

Details Device for inserting tubular members together Device for inserting tubular members together

1990-09-07

1992-03-17

Dang, Hoang C.

Wells

Processes

Assembling well part

166115, 166242, 166345, 166387, 285139, 285345, E21B 3310

Patent

active

050959913

ABSTRACT:
A running tool allows an upper tubular member to be inserted into a lower tubular member in a well without damage to sealing surfaces. The upper tubular member has a first side and a sealing section on a second side. A running tool with a tubular sidewall locates on the upper tubular member. Seals on the running tool engage the first side opposite the sealing section. These seals isolate a pressure area on the opposite side from the sealing section. While running into the well, hydrostatic pressure communicates with the sealing section. A pressure differential between the isolated area and the sealing section results in a radial force. The radial force deflects the sealing section radially. This allows the members to be inserted into each other with the sealing section spaced from the sealing surface of the lower tubular member. Once in place, moving the running tool upward equalizes the pressure across the sealing section. The sealing section springs into engagement with the sealing surface of the lower tubular member.

REFERENCES:
patent: 4165880 (1979-08-01), Olsson
patent: 4281841 (1981-08-01), Kim et al.
patent: 4302018 (1981-11-01), Harvey et al.
patent: 4817716 (1989-04-01), Taylor et al.
patent: 4869319 (1989-09-01), Szymozak et al.
patent: 4872253 (1989-10-01), Carotensen
patent: 4892149 (1990-01-01), Hoes et al.

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