Wellhead Protection Agency
A technology for protecting mechanisms and connecting steel plates, applied in wellbore/well parts, earthwork drilling, sealing/isolation, etc., can solve the problems of deformed downhole tools passing through, radial load in-hole pressure load not in place, etc., to achieve increased Bottom friction, guaranteed pressure bearing capacity, not easy to deform
Active Publication Date: 2016-04-20
YANCHENG BAOTONG MASCH TECH CO LTD
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Problems solved by technology
The existing wellhead devices are not in place in terms of radial load, tensile load due to casing weight and in-hole pressure load, and are prone to deformation during use and affect the passage of downhole tools
Method used
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Embodiment
[0017] like figure 1 As shown, the present invention includes a top ring 1, a plurality of connecting steel plates 2, a chuck 3 and a plurality of triangular supports 5, a plurality of grooves 7 are uniformly arranged at the bottom of the chuck 3, the chuck 3 is a regular octagon, and the chuck 3 A plurality of fixing bolts 6 are also arranged on the upper surface. Both ends of the multiple connecting steel plates 2 in this embodiment are respectively fixed between the top ring 1 and the chuck 3 by bolts, and the multiple connecting steel plates 2 are all perpendicular to the top ring 1 and the chuck 3 at the same time. The center of the chuck 3 of this embodiment is provided with a locking ring 4, and the outer wall of the locking ring 4 is evenly fixed by a plurality of triangular supports 5, and the plurality of triangular supports 5 are all vertically fixed on the upper surface of the chuck 3 . The locking ring 4 is clamped in the cylindrical cavity surrounded by a plura...
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The invention discloses a well mouth protecting mechanism which comprises a top ring (1), a plurality of connecting steel plates (2), a chuck (3) and a plurality of triangular supporting pieces (5). The two ends of each connecting steel plate (2) are fixed between the top circle (1) and the chuck (3) through bolts. The connecting steel plates (2) are all simultaneously perpendicular to the top circle (1) and the chuck (3). A locking ring (4) is arranged at the center of the chuck (3). The outer wall of the locking ring (4) is uniformly fixed through the three triangular supporting pieces (5). The triangular supporting pieces (5) are all perpendicularly fixed to the upper surface of the chuck (3). Through the structure, the well mouth protecting mechanism is improved on the aspects of radial load, textile load of sleeve weight action and inter-well pressure load, the well mouth protecting mechanism does not easily deform and can ensure that underground tools can pass through a well mouth, and oil field yield and economic benefits are improved.
Description
technical field [0001] The invention relates to the field of well drilling, in particular to a well head protection mechanism. Background technique [0002] In oil and natural gas drilling, it is usually installed at the wellhead to control the pressure and direction of gas and liquid (oil, water, etc.), to suspend casing, tubing, and to seal tubing, casing, and the annular space of each layer of casing. device. The loads on the casing suspension device mainly include the radial load of the prototype step, the tensile load of the casing weight and the well pressure load. The casing suspension device should be able to bear the weight of the suspended casing string, so as not to cause necking deformation and affect the passage of downhole tools. The existing wellhead devices do not do enough in terms of radial load, tensile load due to casing weight and well pressure load, and are prone to deformation during use and affect the passage of downhole tools. In order to promote ...
Claims
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IPC IPC(8): E21B33/03E21B23/00
Inventor 谭正怀
Owner YANCHENG BAOTONG MASCH TECH CO LTD