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CN-121776539-B - Cutting device for machining embedded double slips of hanger

CN121776539BCN 121776539 BCN121776539 BCN 121776539BCN-121776539-B

Abstract

The invention relates to a cutting device for machining embedded double slips of a hanger, which belongs to the technical field of slip cutting devices and comprises a positioning structure, wherein the positioning structure comprises a mandrel and a plurality of support rods arranged on the mandrel, the plurality of support rods can be divided into a plurality of support rod groups which are uniformly distributed around the central axis of the mandrel, each support rod group is respectively supported on the inner side wall of a slip blank used for forming a slip area, each support rod group comprises two support rod rows which are symmetrically distributed around the plane of the central axis of the mandrel, each support rod row comprises a plurality of support rods with the same extending direction and distributed at intervals along the central axis direction of the mandrel, the support rods in the two support rod rows in the same support rod group are sequentially distributed in a staggered manner along the central axis direction of the mandrel, and the central axis of each support rod keeps different planes with the central axis of the mandrel. According to the invention, tangential supporting force can be applied to the slip blank, and the supporting stability is improved.

Inventors

  • HU JINJIAN
  • LIU XINGTIAN
  • ZHENG YULONG

Assignees

  • 德州地平线石油科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260304

Claims (9)

  1. 1. The cutting device for machining the embedded double slips of the hanger comprises a positioning structure, wherein the positioning structure comprises a mandrel (1) and a plurality of support rods (9) arranged on the mandrel (1), and is characterized in that the plurality of support rods (9) can be divided into a plurality of groups of support rod groups which are uniformly distributed around the central axis of the mandrel (1), each group of support rods is respectively supported on the inner side wall of an area forming the slips (3) in a slip blank (2), each group of support rod groups comprises two rows of support rod rows which are symmetrically distributed on the plane of the central axis of the mandrel (1), each row of support rod rows comprises a plurality of support rods (9) which are distributed at intervals along the central axis direction of the mandrel (1) and have the same extending direction, and each support rod (9) in the two rows of support rod rows in the same support rod group is sequentially distributed in a staggered manner along the central axis direction of the mandrel (1), and the central axis of each support rod (9) keeps different planes with the central axis of the mandrel (1) so that the support rods (9) form a branching supporting force along the tangential direction of the slip blank (2); The mandrel (1) is tubular, a push rod (6) is coaxially arranged in the mandrel (1) in a penetrating way, a plurality of conical pushing blocks (10) which are arranged at equal intervals along the length direction of the rod are fixedly sleeved on the push rod (6), the small diameter ends of the conical pushing blocks (10) face the same direction, a plurality of supporting rods (9) with the rod axis positioned in the same cross section of the mandrel (1) are called a circle of supporting rods, the circles of supporting rods correspond to the positions of the conical pushing blocks (10) respectively, the inner ends of the supporting rods (9) are elastically pressed on the outer side walls of the corresponding conical pushing blocks (10), and the push rod (6) can move along the length direction of the rod so as to push the supporting rods (9) in the supporting rod group to stretch out or retract.
  2. 2. The cutting device for machining the embedded double slips of the hanger according to claim 1 is characterized in that a mounting plate is fixedly mounted in the mandrel (1), the pushing rod (6) is spirally arranged on the mounting plate in a penetrating mode, and the conical pushing blocks (10) can be driven to reciprocate along the axis direction of the mandrel (1) by rotating the pushing rod (6).
  3. 3. The cutting device for machining the embedded double slips of the hanger according to claim 2, wherein the ejector rod (6) is provided with graduation marks (19), and the graduation marks (19) are positioned on one side of the mounting plate.
  4. 4. A cutting device for machining a hanger embedded double slip according to claim 3, characterized in that the end of the push rod (6) provided with the scale mark is connected with a screwing handle (7).
  5. 5. Cutting device for machining embedded double slips of a hanger according to any of claims 1-4, characterized in that the outer end of the support rod (9) is coaxially connected with a vibration damping assembly, which is elastically pressed against the inner side wall of the slip blank (2).
  6. 6. The cutting device for machining embedded double slips of a hanger according to claim 5, wherein the vibration damping assembly comprises a vibration damping rod (8), the outer end of the vibration damping rod (8) is connected with a rubber head (11), the support rod (9) is hollow, the vibration damping rod (8) and the support rod (9) are coaxially and slidably arranged in the support rod (9) in a penetrating manner, an elastic piece capable of stretching along the axis of the support rod (9) is connected between the vibration damping rod and the support rod (9), and the elastic piece applies elastic force back to the support rod (9) to the vibration damping rod (8) so that the rubber head (11) is tightly pressed on the inner side wall of a slip blank (2).
  7. 7. The cutting device for machining embedded double slips of a hanger according to any one of claims 1 to 4, wherein two end limiting members (4) are mounted on the mandrel (1), annular clamping grooves (404) into which the ends of the slip blanks (2) are clamped are formed in the end limiting members (4), and openings of the two annular clamping grooves (404) in the two end limiting members (4) are arranged oppositely.
  8. 8. The cutting device for machining a hanger-embedded double slip according to claim 7, wherein the position of the end stopper (4) on the mandrel (1) along the axial direction of the mandrel (1) is adjustable.
  9. 9. The cutting device for machining the embedded double slips of the hanger according to claim 8, wherein a plurality of threaded holes are formed in the mandrel (1) at equal intervals along the axis direction of the mandrel (1), locking bolts (5) are arranged on the end limiting piece (4) in a penetrating mode, and the locking bolts (5) can be screwed into different threaded holes to achieve adjustment of the positions of the end limiting piece (4) in the axis direction of the mandrel (1).

Description

Cutting device for machining embedded double slips of hanger Technical Field The invention relates to the technical field of slips cutting devices, in particular to a cutting device for machining an embedded double slips of a hanger. Background In modern oil and gas drilling engineering, a liner hanger is a key device for realizing efficient and safe well completion of complex wells, deep wells and small-clearance wells. The performance of the embedded double slips of the core anchoring component directly determines the reliability and safety of the whole pipe column suspension system. In recent years, as drilling technology advances toward ultra-deep, ultra-high temperature and high pressure and unconventional resource exploitation, unprecedented challenges are presented to the load-bearing capacity, sealing performance and operational reliability of liner hangers. In this context, an in-line double slip construction has evolved and is gradually replacing conventional slips due to its significant technical advantages. The embedded double slips are double conical surface and multi-piece anchoring mechanisms integrated in the inner cavity of the hanger body. The core design concept is that two groups of independent slip components are preset in a specific cavity of a hanger body in an embedded mode, and are excited in a hydraulic or mechanical mode to synchronously expand along the radial direction of a conical surface and bite the upper sleeve wall, so that the reliable hanging and load transmission of a tail pipe string are realized. In the prior art, when a slip is processed, a tubular blank is usually clamped on a cutting device, and is cut to form a plurality of slips. The utility model provides a slips processingequipment as disclosed in patent application document of application publication number CN119657970A, the device includes the dabber, set up in the elastic support subassembly of dabber surface and cover is arranged in first clamp plate and the second clamp plate of dabber surface, first draw-in groove and second draw-in groove have been seted up respectively on first clamp plate, the second clamp plate, the both ends of slips block respectively in first draw-in groove and second draw-in groove, the tip that elastic support subassembly kept away from the dabber is in pressing contact with the surface of slips. The device can provide sufficient holding power through first clamp plate, second clamp plate and elastic support subassembly to can provide damping performance for the slips through elastic support subassembly, thereby make the slips possess better stability in the course of working, avoid the slips to drop from loading mechanism, improve work piece precision and machining efficiency. However, in the device, the elastic support component generally extends along the radial direction of the mandrel, the elastic support component can only support the slip blank in the radial direction of the slip blank, and the slip blank is limited in the tangential direction, in the machining process, if the blank encounters large tangential resistance, the blank is easy to rotate relative to the mandrel, and the machining precision is affected. Disclosure of Invention The invention provides a cutting device for machining an embedded double-slip of a hanger, which aims to solve the technical problem that in the prior art, the cutting device for machining the slip cannot limit a slip blank in the tangential direction, so that the slip blank is easy to rotate relative to a mandrel when subjected to larger tangential resistance in the machining process, and the machining accuracy is affected. In order to solve the problems, the cutting device for machining the embedded double slips of the hanger provided by the invention adopts the following technical scheme: the utility model provides an embedded two slips processings of hanger are with cutting device, including location structure, location structure includes the dabber and installs at the multiple spinal branch vaulting pole of dabber, multiple spinal branch vaulting pole can divide into the multiunit bracing piece group of evenly arranging around the dabber central axis, each bracing piece group is supported respectively on the inside wall in the region that forms the slips in the slips blank, every group bracing piece group all includes two and is listed as the bracing piece row that the plane symmetry arranged about the dabber central axis place, every row bracing piece row all includes the bracing piece that the many extension directions that arrange along dabber central axis direction interval are the same, every bracing piece in two rows of bracing piece rows in the same bracing piece group is along dabber central axis direction crisscross arranging in proper order, the central axis of every bracing piece all keeps the abnormal plane with the central axis of dabber, so that the bracing piece forms the branch props power along its tangential to the sl