Front opening double wellhead derrick for offshore drilling platform
A drilling platform and front opening technology, which is applied to drilling equipment, earthwork drilling, support devices, etc., can solve the problems of insufficient V-shaped front opening height, limited capacity of the second-floor platform, affecting the movement of drilling tools, etc., and achieves a reduction in weight. , the effect of reducing the height and reducing the volume
Active Publication Date: 2018-08-10
LANZHOU LS PETROLEUM EQUIP ENG CO LTD
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Problems solved by technology
[0003] The object of the present invention is to provide a double wellhead derrick structure with front openings for offshore drilling platforms, to solve the problem that the two-story platform and the pipe arrangement machine are located inside the main body of the derrick, the derrick is bulky, the capacity of the second-story platform is limited, and the height of the V-shaped front opening is not enough. Issues Affecting Drill Tool Movement
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Embodiment Construction
[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0019] Such as Figure 1 to Figure 4 Shown is a double wellhead derrick with front openings for an offshore drilling platform, which includes a base 1 with four legs connected to the surface of the drilling platform, and a derrick main body 11. The derrick main body 11 includes a driller's opposite side unit composed of transverse tie rods and diagonal tie rods. 7. Driller’s side unit 8, main drilling rig’s side unit 9, auxiliary drilling rig’s side unit 10, each adjacent derrick unit is connected by bolts and connecting plates, the feature is that the derrick main body 11 is located between the main wellhead and the auxiliary wellhead , the outer side of the driller's opposite side unit 7 of the derrick main body 11 is provided with a two-story platform 2, and the top of the second-story platform 2 is provided with a pipe row machine 5, and the lower section...
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The invention discloses a double wellhead derrick with front openings for an offshore drilling platform, which includes a base, a derrick main body located between the main wellhead and the auxiliary wellhead, the derrick main body includes a driller's opposite side unit composed of a transverse tie rod and an inclined tie rod, a driller's Drilling side unit, main drilling rig side unit, auxiliary drilling rig side unit, the side unit opposite to the driller is equipped with a second-floor platform, and the top of the second-floor platform is equipped with a pipe laying machine, and the lower section of the track of the pipe laying machine is located below the main deck of the drilling platform The upper section of the track of the pipe rower is connected to the cantilever frame protruding from the main body of the derrick; the side of the driller's side unit opposite to the second floor platform is open. The derrick described in the present invention has a front opening structure with four legs, and the front side of the driller side unit is open, which facilitates the movement of drilling tools; the capacity of the second floor platform is not affected by the main body of the derrick, which increases the storage capacity of drilling tools. The internal space of the main body of the derrick is saved, the cross-sectional size of the main body of the derrick becomes smaller, the volume of the main body of the derrick is reduced, and the weight of the main body of the derrick is reduced.
Description
technical field [0001] The invention relates to the technical field of an offshore drilling platform derrick, in particular to a front opening double wellhead derrick for an offshore drilling platform. Background technique [0002] The derrick of an ocean drilling rig is an important part of an ocean drilling platform. The traditional structure of the derrick for an ocean drilling rig mainly includes a tower-type or bottle-type single derrick. It is arranged inside the derrick, at the middle and upper part of the derrick. For these two types of derricks, in order to increase the stability of the derrick, the height of the V-shaped opening should not be too high, resulting in limited movement space for drilling tools; When placed on the drilling floor, the drilling platform bears a large wind load; since the two-story platform and the pipe arrangement machine are located inside the derrick, the derrick is bulky and the manufacturing cost is high. Contents of the invention ...
Claims
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IPC IPC(8): E21B15/00
CPCE21B15/003
Inventor 成斌陈波张建
Owner LANZHOU LS PETROLEUM EQUIP ENG CO LTD