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CN-122014143-A - Conical surface metal seal used for casing mud line suspension system

CN122014143ACN 122014143 ACN122014143 ACN 122014143ACN-122014143-A

Abstract

The invention discloses a sealing technology form-conical surface metal seal for a casing mud line suspension system, which relates to the technical field of casing mud line suspension systems and comprises an outer casing, an inner casing I arranged in the outer casing, an inner casing II arranged in the inner casing I, a fastening device arranged on the outer casing, and a fastening mechanism and a pushing mechanism, wherein the fastening mechanism comprises a fastening plate, a connecting block fixedly arranged on the fastening plate, a bevel ring fixedly arranged on the connecting block, a matching ring fixedly arranged on the outer casing and a bevel block I fixedly arranged on the matching ring, and can drive the fastening plate to start synchronous movement when moving along the bevel of the bevel block I through the bevel ring, gradually clamp the outer casing until the outer casing is completely clamped, so that the contact surface of the conical surface metal seal device can keep good contact pressure.

Inventors

  • WU QINGHUA
  • YU XIAOTAO
  • ZHANG ZHIQIANG
  • WANG TAO
  • Fan Zaichao
  • LIU HUAGUO
  • JIA PENG

Assignees

  • 威飞海洋装备制造有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (10)

  1. 1. A sealing technology form-conical surface metal seal for a casing mud line suspension system, which comprises an outer casing (1), an inner casing I (2) arranged inside the outer casing (1) and an inner casing II (3) arranged inside the inner casing I (2), and is characterized by further comprising a fastening device arranged on the outer casing (1); The fastening device comprises a fastening mechanism for fastening the outer sleeve (1) when the whole device works and a pushing mechanism for pushing the fastening mechanism to start moving work when the whole device starts working; The fastening mechanism comprises a fastening plate (9), a connecting block (10) fixedly installed on the fastening plate (9), an inclined plane ring (11) fixedly installed on the connecting block (10), a matching ring (12) fixedly installed on the outer sleeve (1) and an inclined plane block I (13) fixedly installed on the matching ring (12).
  2. 2. The sealing technology form-conical surface metal seal for a casing mud line suspension system according to claim 1, wherein the pushing mechanism comprises a fixed ring (4), an electric telescopic rod (5) arranged on the fixed ring (4), a top ring (6) fixedly arranged at the output end of the electric telescopic rod (5), a vertical plate (7) fixedly arranged on the top ring (6) and an elastic telescopic rod I (8) fixedly arranged on the vertical plate (7).
  3. 3. A sealing technique form-conical surface metal seal for a casing mud line suspension system according to claim 2, wherein the movable end of the elastic telescopic rod I (8) is fixedly connected with the fastening plate (9), and the surfaces of the inclined surface ring (11) and the inclined surface block I (13) which are close to each other are all inclined surfaces.
  4. 4. The sealing technique form-conical surface metal seal for a casing mud line suspension system according to claim 1, characterized in that the sealing technique form-conical surface metal seal for a casing mud line suspension system further comprises a protection device mounted on the outer casing (1); The protection device is used for effectively protecting the fastening device when the whole device works, and simply sealing the area of the fastening device.
  5. 5. The sealing technology form-conical surface metal seal for a casing mud line suspension system according to claim 4, wherein the protection device comprises a guide block (141) fixedly mounted on the circumferential surface of a fixed ring (4), a protection plate (142) slidingly mounted on the guide block (141), a first inclined plate (143) fixedly mounted on the protection plate (142), a sealing plate (144) fixedly mounted on the outer casing (1), a driving ring (145) arranged on the outer casing (1), a driven ring (146) fixedly mounted on the output end of the driving ring (145), a fixed block (147) fixedly mounted on the driven ring (146) and a second inclined plate (148) fixedly mounted on the fixed block (147).
  6. 6. The sealing technique for a casing mud line suspension system, namely a conical surface metal seal, according to claim 5, wherein the surfaces of the second inclined surface plate (148) and the first inclined surface plate (143) which are close to each other are inclined surfaces, the first inclined surface plate (143) is not contacted with the protection plate (142), and the driving ring (145) is electrically connected with the electric telescopic rod (5).
  7. 7. The sealing technique form-cone metal seal for a casing mud line suspension system according to claim 1, characterized in that the sealing technique form-cone metal seal for a casing mud line suspension system further comprises a locking device mounted on the outer casing (1); The locking device comprises a limiting mechanism for locking the protecting device when the whole device works and a releasing mechanism for releasing the locking of the protecting device after the work is finished.
  8. 8. The sealing technique form-conical surface metal seal for a casing mud line suspension system according to claim 7, wherein the limiting mechanism comprises two partition plates (151) fixedly mounted on a closing plate (144), a fixing rod (152) fixedly mounted between the two partition plates (151), a sliding plate (153) slidably mounted on a circumferential surface of the fixing rod (152), a connecting plate (154) fixedly mounted on the sliding plate (153), a limiting block (155) fixedly mounted on the connecting plate (154), and a limiting plate (156) fixedly mounted on a protecting plate (142).
  9. 9. The sealing technique form-conical surface metal seal for a casing mud line suspension system according to claim 8, wherein the release mechanism comprises a fixing frame (157) fixedly mounted on the closing plate (144), a second elastic telescopic rod (158) fixedly mounted on the fixing frame (157), a bevel rod (159) fixedly mounted on the movable end of the second elastic telescopic rod (158), a second bevel block (1510) fixedly mounted on the connecting plate (154), and a pulling plate (1511) fixedly mounted on the circumferential surface of the movable end of the second elastic telescopic rod (158).
  10. 10. The sealing technique form-conical surface metal seal for a casing mud line suspension system according to claim 9, wherein one surface of the limiting block (155) close to the limiting plate (156) is provided with an inclined surface, one surface of the inclined surface rod (159) and one surface of the inclined surface block II (1510) which are contacted with each other are provided with inclined surfaces, and a spring is arranged between the sliding plate (153) and the separation plate (151).

Description

Conical surface metal seal used for casing mud line suspension system Technical Field The invention relates to the technical field of casing mud line suspension systems, in particular to a sealing technical form-conical surface metal seal for a casing mud line suspension system. Background The conical surface metal seal is a sealing technology form commonly used in casing mud line suspension systems, and is mainly used for sealing requirements in drilling operations of oil and gas wells, geothermal wells and the like. Under the action of a certain compression force, the sealing effect is realized by utilizing the contact of the opposite surfaces of the conical surfaces of the metal material. Patent publication number CN222879659U relates to casing mud line suspension system technical field, including outer casing hanger body is fixed in on the riser through first seat shoulder, and the middle level casing hanger body is fixed in on the outer casing hanger body through the second seat shoulder, and the inlayer casing hanger body is fixed in on the middle level casing hanger body through thorn buckle, and all seal through metal coating and metal seal circle between the upper portion of outer casing hanger body and middle level casing hanger body and its instrument of lowering down, seal through arc conical surface double V metal seal structure between the upper portion of inlayer casing hanger body and the instrument of lowering down. Through reasonable in design's structural layout, sealed setting, select material and screw thread to close length, make mud line suspension be applicable to in the harsh environment of high temperature high pressure well to effectively improve bulk strength and connection reliability. Above-mentioned scheme, through reasonable in design's structural layout, sealed setting, select material and screw thread to close length, make mud line suspension can be applicable to in the harsh environment of high temperature high pressure well to effectively improve bulk strength and connection reliability, but above-mentioned scheme exists and is difficult to fasten whole device at the during operation, makes the device appear not hard up problem easily at the during operation. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a sealing technology form-conical surface metal seal for a casing mud line suspension system, and solves the problems in the background art. In order to achieve the above purpose, the invention is realized by the following technical scheme: the sealing technology form-conical surface metal seal for the casing mud line suspension system comprises an outer casing, an inner casing I arranged in the outer casing, an inner casing II arranged in the inner casing I, and a fastening device arranged on the outer casing; The fastening device comprises a fastening mechanism for fastening the outer sleeve when the integral device works and a pushing mechanism for pushing the fastening mechanism to start moving work when the integral device starts working; The fastening mechanism comprises a fastening plate, a connecting block fixedly installed on the fastening plate, an inclined plane ring fixedly installed on the connecting block, a matching ring fixedly installed on the outer sleeve and an inclined plane block I fixedly installed on the matching ring, the electric telescopic rod is started after the device is installed in place, the electric telescopic rod pushes the top ring to start moving, the top ring drives the vertical plate to start moving when moving, the vertical plate moves to drive the elastic telescopic rod to start synchronously moving, the elastic telescopic rod drives the fastening plate to start synchronously moving when moving, the fastening plate moves to drive the connecting block to start synchronously moving, the connecting block moves to drive the inclined plane ring to start moving, the inclined plane ring moves to contact with the inclined plane block and start moving along the inclined plane extending direction of the inclined plane block, and the inclined plane ring drives the fastening plate to start synchronously moving when moving along the inclined plane of the inclined plane block I. The pushing mechanism comprises a fixed ring, an electric telescopic rod arranged on the fixed ring, a top ring fixedly arranged at the output end of the electric telescopic rod, a vertical plate fixedly arranged on the top ring and an elastic telescopic rod I fixedly arranged on the vertical plate, and the fastening mechanism can be ensured to smoothly move to fasten when in operation through the arrangement of the pushing mechanism. The movable end of the first elastic telescopic rod is fixedly connected with the fastening plate, the inclined plane ring and one surface of the first inclined plane block, which is close to each other, are all arranged to be inclined planes, the movable end of the first elastic telescopic rod can be