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CN-224214148-U - Ram blowout preventer and locking device thereof

CN224214148UCN 224214148 UCN224214148 UCN 224214148UCN-224214148-U

Abstract

The utility model relates to the technical field of drilling engineering, and particularly discloses a locking device of a ram blowout preventer, which comprises a hydraulic cylinder head, wherein the hydraulic cylinder head is provided with an inner hole and an observation groove communicated with the inner hole, the wall of the inner hole is provided with at least two first locking petals protruding in the radial direction, each first locking petal is distributed at intervals in the circumferential direction, the middle part of each first locking petal is provided with a locking groove, a manual locking shaft is penetrated in the inner hole, a locking shaft sleeve is sleeved outside the manual locking shaft, the outer circumferential surface of the locking shaft sleeve is provided with second locking petals corresponding to each first locking petal respectively, and a locking rod is penetrated in the observation groove and inserted into the locking hole to drive the locking shaft sleeve and the manual locking shaft to rotate around an axis so that the second locking petals rotate in the locking grooves to be opposite to the first locking petals to be axially locked. The locking device of the ram blowout preventer is simple in structure, convenient to operate, safe and reliable, and is not easy to lock due to corrosion and the like due to the fact that the first locking clack and the second locking clack are matched to lock.

Inventors

  • ZHANG LIANG
  • HAN RU
  • WU LIJIE
  • HAN ZHIMIN
  • ZHI JUNFENG
  • Zhang Jiangye

Assignees

  • 中石化石油工程技术服务股份有限公司
  • 中石化中原石油工程有限公司
  • 中石化中原石油工程有限公司管具公司

Dates

Publication Date
20260508
Application Date
20250606

Claims (10)

  1. 1. A ram blowout preventer locking apparatus, comprising: the hydraulic cylinder head (1), the hydraulic cylinder head (1) is provided with an inner hole and an observation groove (14) communicated with the inner hole, the wall of the inner hole is provided with at least two first lock petals (12) protruding along the radial direction, each first lock petal (12) is distributed at intervals along the circumferential direction, and the middle part of each first lock petal (12) is provided with a lock groove (13) extending to two sides of the first lock petal (12) along the circumferential direction; The manual locking shaft (3) is arranged in the inner hole in a penetrating way, and one end of the manual locking shaft (3) is provided with a thread (31) used for being connected with a hydraulic cylinder piston of the ram blowout preventer; The locking shaft sleeve (2) is sleeved outside the manual locking shaft (3), second lock petals (21) are respectively arranged on the outer peripheral surface of the locking shaft sleeve (2) and correspond to the first lock petals (12), the second lock petals (21) can be respectively inserted into gaps of the first lock petals (12) to axially and relatively move to the locking grooves (13), and locking holes (22) are formed in the locking shaft sleeve (2); The locking rod (4) is used for penetrating through the observation groove (14) and inserting into the locking hole (22) so as to drive the locking shaft sleeve (2) and the manual locking shaft (3) to rotate around the axis, so that the second locking lobe (21) rotates to the position, opposite to the first locking lobe (12), of the second locking lobe (21) in the locking groove (13) so as to be axially locked.
  2. 2. The locking device of the ram blowout preventer according to claim 1, wherein the wall of the inner bore is provided with N first locking lobes (12) and uniformly distributed in the circumferential direction, each first locking lobe (12) is in a sector shape, and the central angle is 180 °/N, wherein N is a natural number greater than 1; The second lock lobes (21) are correspondingly provided with N second lock lobes (21) which are uniformly distributed along the circumferential direction, each second lock lobe (21) is in a fan shape, and the central angle is 180 degrees/N.
  3. 3. The locking device of the ram blowout preventer according to claim 1, wherein the outer circumferential surface of the manual locking shaft (3) is provided with a locking shaft sealing groove (34), a locking shaft sealing ring (5) is provided in the locking shaft sealing groove (34), and the locking shaft sealing ring (5) is in close contact with the inner circumferential surface of the locking shaft sleeve (2).
  4. 4. The locking device of the ram blowout preventer according to claim 1, wherein the wall of the inner hole is provided with a hydraulic cylinder head sealing groove (15), a hydraulic cylinder head sealing ring (6) is installed in the hydraulic cylinder head sealing groove (15), and the hydraulic cylinder head sealing ring (6) is in close contact with the outer peripheral surface of the locking shaft sleeve (2).
  5. 5. The ram blowout preventer lock apparatus according to any one of claims 1 to 4, wherein the lock shaft sleeve (2) comprises two split semi-cylindrical pieces, the two semi-cylindrical pieces being fixedly connected.
  6. 6. The ram blowout preventer lock apparatus according to any one of claims 1 to 4, wherein at least part of the lock lever (4) is a magnetic member to be magnetically attracted to the hydraulic ram head (1).
  7. 7. The locking device of the ram blowout preventer according to any one of claims 1 to 4, wherein the outer circumferential surface of the manual locking shaft (3) is provided with two positioning steps (32), the two positioning steps (32) are disposed opposite to each other in the axial direction, and the locking shaft sleeve (2) is disposed between the two positioning steps (32) and is axially limited.
  8. 8. The ram blowout preventer locking device according to any one of claims 1 to 4, wherein the other end of the manual locking shaft (3) is provided with a square shaft (33) to mate with a square hole hand wheel.
  9. 9. The ram blowout preventer locking device according to any one of claims 1 to 4, wherein the hydraulic ram head (1) is provided with a plurality of the observation grooves (14), the plurality of observation grooves (14) being uniformly distributed in the circumferential direction.
  10. 10. A ram blowout preventer comprising a locking device as claimed in any one of claims 1 to 9.

Description

Ram blowout preventer and locking device thereof Technical Field The utility model relates to the technical field of drilling engineering, in particular to a ram blowout preventer and a locking device thereof. Background Ram blowout preventers are core components of well control equipment, and are mainly used for wellhead pressure control in oil and gas drilling operations so as to prevent blowout accidents. Ram blowout preventers generally include a housing, a drive assembly (hydraulic/manual), a ram assembly, a locking device, a sealing mechanism, and the like. After the hydraulic driving piston pushes the flashboard to close towards the center, if the condition that the well is sealed for a long time or the flashboard is prevented from being opened due to hydraulic failure is needed, the flashboard is locked at the position of the flashboard by using a flashboard locking device, the flashboard is prevented from moving outwards under the action of the fluctuating pressure in the well, and the stability and the reliability of the well sealing of the blowout preventer are ensured. The existing manual locking is realized by utilizing the trapezoidal reverse buckling screw thread rotation, but the locking process is troublesome and laborious, and in addition, due to long-time locking, the locking process is influenced by the severe environment of a well site, the screw thread is rusted or the locking surface is blocked, the locking or unlocking is difficult, and the blowout preventer cannot be normally opened or closed. In summary, how to effectively solve the problem that the reliability of the manual locking device of the ram blowout preventer is low is a problem that needs to be solved by those skilled in the art at present. Disclosure of utility model In view of the above, the present utility model aims to provide a ram blowout preventer and a locking device thereof, and the structural design of the ram blowout preventer and the locking device thereof can effectively solve the problem of lower reliability of a manual locking device of the ram blowout preventer. In order to achieve the above purpose, the present utility model provides the following technical solutions: A ram blowout preventer locking apparatus, comprising: The hydraulic cylinder head is provided with an inner hole and an observation groove communicated with the inner hole, the wall of the inner hole is provided with at least two first lock petals protruding in the radial direction, the first lock petals are distributed at intervals in the circumferential direction, and the middle part of each first lock petal is provided with a lock groove extending to two sides of the first lock petal in the circumferential direction; The manual locking shaft penetrates through the inner hole, and one end of the manual locking shaft is provided with threads for connecting with a hydraulic cylinder piston of the ram blowout preventer; The locking shaft sleeve is sleeved outside the manual locking shaft, second lock petals are respectively arranged on the outer peripheral surface of the locking shaft sleeve and correspond to the first lock petals, the second lock petals can be respectively inserted into the gaps of the first lock petals to axially and relatively move to the locking grooves, and locking holes are formed in the locking shaft sleeve; The locking rod is used for penetrating through the observation groove and inserting into the locking hole so as to drive the locking shaft sleeve and the manual locking shaft to rotate around the axis, so that the second locking valve rotates in the locking groove until the second locking valve and the first locking valve are opposite to each other to be axially locked. Optionally, in the locking device of the ram blowout preventer, the hole wall of the inner hole is provided with N first locking lobes which are uniformly distributed along the circumferential direction, each first locking lobe is in a sector shape, and the central angle is 180 °/N, wherein N is a natural number greater than 1; The second lock lobes are correspondingly provided with N second lock lobes and are uniformly distributed along the circumferential direction, each second lock lobe is in a fan shape, and the central angle is 180 degrees/N. Optionally, in the locking device of the ram blowout preventer, a locking shaft sealing groove is formed in the outer peripheral surface of the manual locking shaft, a locking shaft sealing ring is arranged in the locking shaft sealing groove, and the locking shaft sealing ring is in tight contact with the inner peripheral surface of the locking shaft sleeve. Optionally, in the locking device of the ram blowout preventer, a hydraulic cylinder head sealing groove is formed in a hole wall of the inner hole, a hydraulic cylinder head sealing ring is arranged in the hydraulic cylinder head sealing groove, and the hydraulic cylinder head sealing ring is in tight contact with the outer peripheral surface of th