Stratum rock debris supporting and packing device

A technology of isolation devices and cuttings, applied in sealing/isolation, drilling equipment, wellbore/well components, etc., can solve problems such as production layer plugging, oil and gas well scrapping, rupture, etc.

CN107939304AActive Publication Date: 2018-04-20BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-04-20

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Abstract

The invention discloses a stratum rock debris supporting and packing device. The stratum rock debris supporting and packing device comprises a first cylindrical body and a second cylindrical body which are sequentially connected, a first hydraulic thrust system and a supporting mechanism are sequentially arranged on the side wall of the outer side of the first cylindrical body from top to bottom,and a second hydraulic thrust system, a packing mechanism and a fixing sleeve are sequentially arranged on the side wall of the outer side of the second cylindrical body from top to bottom; and the first hydraulic thrust system and the second hydraulic thrust system act on the supporting mechanism and the packing mechanism correspondingly, axially downward pressure is applied to the supporting mechanism and the packing mechanism simultaneously under the hydraulic effect, and therefore the supporting mechanism and the packing mechanism expand radially due to being pressed. According to the stratum rock debris supporting and packing device, the problems of fallen rock debris supporting and permanent acting are effectively solved, effective packing is conducted on the upper and lower well sections, it is ensured that a borehole section located below the stratum rock debris supporting and packing device is effectively protected, normal mining and packing can be conducted on an oil and gaswell, therefore the shaft quality is improved, and the oil and gas recovery rate is increased.
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Description

technical field

[0001] The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to a formation cuttings support and isolation device. Background technique

[0002] During the drilling construction, it is often encountered that the easily collapsed formations are prone to collapse and drop cuttings. For example, if the oil and gas well is designed to be completed with open holes, the upper part of the well section of the production zone contains a collapsible formation, and the collapsed cuttings will block the lower wellbore or production zone, thereby affecting the recovery rate, and even causing the oil and gas well to be scrapped. Some people put the hydraulic expandable packer in the lower part of the easily collapsed well section for support and isolation, but it can only solve the short-term problem. As time goes by, the packer rubber sleeve will age and rupture, and the filled mud will flow out Afterwards, t...

Examples

Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0021] like figure 1 As shown, the formation cuttings support and isolation device includes an upper joint 1, a first cylindrical body 2 and a second cylindrical body 15 connected sequentially from top to bottom; A first hydraulic thrust system and a support mechanism are arranged in sequence from top to bottom; a second hydraulic thrust system, a packing mechanism and a fixing sleeve 14 are arranged in sequence on the outer side wall of the second cylindrical body 15 from top to bottom; among them,

[0022] The upper joint 1 and the first cylindrical body 2 are screwed and fixed, and the first cylindrical body 2 and the second cylindrical body 15 are connected and fixed by double female collars 8; The connection internal thread connected with the pipe string; the bottom oute...