CN111101888A - Novel soluble bridge plug - Google Patents

Abstract

Translated fromChinese

本发明公开一种新型可溶桥塞，包括中心管、球座、剪切销钉、上卡瓦、上椎体、可溶胶筒、C型支撑环、引鞋、下椎体和下卡瓦，所述剪切销钉设于球座上端，所述剪切销钉贯穿于中心管并向内延伸将其与球座固定连接，可溶胶筒适配设于上椎体和C型支撑环间，C型支撑环能够起到支撑可溶胶桶的作用，C型支撑环机辅助密封性能极佳，能够通过上椎体和C型支撑环将可溶胶筒卡套于中间，使得可溶胶桶不会存在通过挤压分瓣式结构使得可溶胶筒从分瓣开口处向两端挤压从椎体和中心管之间的环空处挤出损坏的问题，保证可溶胶桶整体的稳定密封性；引鞋外端镶嵌有防磨颗粒，能够有效避免引鞋在井底与井壁产生摩擦，是桥塞安全可靠的送至指定位置，保证施工安全可靠。

The invention discloses a novel dissolvable bridge plug, comprising a central tube, a ball seat, a shearing pin, an upper slip, an upper vertebral body, a soluble glue cylinder, a C-shaped support ring, a guide shoe, a lower vertebral body and a lower slip. The shearing pin is arranged on the upper end of the ball seat, the shearing pin penetrates the central tube and extends inward to be fixedly connected with the ball seat, and the soluble glue tube is fitted between the upper vertebral body and the C-shaped support ring, The C-type support ring can play the role of supporting the sol barrel. The C-type support ring has excellent auxiliary sealing performance. By squeezing the split-valve structure, the soluble glue barrel is squeezed from the split opening to both ends, and it is extruded and damaged from the annulus between the vertebral body and the central tube, so as to ensure the overall stable sealing performance of the soluble glue barrel; The outer end of the shoe is inlaid with anti-wear particles, which can effectively avoid the friction between the guide shoe and the well wall at the bottom of the well.

Description

Novel soluble bridge plug

Technical Field

The invention relates to the technical field of soluble bridge plugs, in particular to a novel soluble bridge plug.

Background

Dissoluble bridge plug is a neotype bridge plug technique based on quick drilling fracturing bridge plug development, this bridge plug is applicable to horizontal well pumping fracturing, techniques such as temporary shutoff of oil gas well, current dissoluble bridge plug structural design is tedious, the sealing ring that the dissoluble glue bucket supported and sealed the dissoluble glue section of thick bamboo adopts split type sealing ring to seal usually, there may be the clearance after the split type sealing ring is set up, and the dissoluble glue bucket is very easily to be followed the department and extruded the damage at the setting pressure-bearing, influence the leakproofness, and when the shaft bottom operation, the guide shoe can often produce the friction with the wall of a well, lead to the guide shoe damaged, influence normal pumping construction, consequently, need for technical staff in the field to design a neotype dissoluble bridge plug urgently.

Disclosure of Invention

The soluble rubber barrel is arranged between the upper cone and the C-shaped support ring in a matched mode, the C-shaped support ring can play a role in supporting the soluble rubber barrel, the C-shaped support ring is excellent in auxiliary sealing performance, the soluble rubber barrel can be clamped and sleeved in the middle through the upper cone and the C-shaped support ring, the soluble rubber barrel cannot be damaged by extrusion from a split opening to two ends through extrusion, and the problem that the soluble rubber barrel is extruded and damaged from an annular space between the cone and a central tube through extrusion of a split structure is solved, and the stable sealing performance of the whole soluble rubber barrel is guaranteed; the outer end of the guide shoe is inlaid with anti-abrasion particles, so that friction between the guide shoe and a well wall can be effectively avoided, the bridge plug is safely and reliably conveyed to a designated position, and the construction safety and reliability are guaranteed.

In order to solve the problems, the invention provides a novel soluble bridge plug which comprises a central tube, a ball seat, a shearing pin, an upper slip, an upper cone, a soluble rubber tube, a C-shaped support ring, a lower cone, a lower slip and a guide shoe, wherein the inner end of the central tube is provided with the ball seat, the shearing pin is arranged at the upper end of the ball seat, penetrates through the central tube and extends inwards to be fixedly connected with the ball seat, the central tube is sequentially sleeved with a compression ring, the upper slip, the upper cone, the soluble rubber tube, the C-shaped support ring, the lower cone, the lower slip and the guide shoe, the upper slip and the lower slip are both embedded into an integrated structure by ceramic hard alloy, the soluble rubber tube is adaptive to the upper cone and the type support ring, the soluble rubber tube is of a single-layer rubber tube structure, and the outer end of the guide shoe is embedded.

Preferably, a compression ring is sleeved on the central pipe and arranged at the front end of the upper slip.

Preferably, a lower cone is arranged between the C-shaped support ring and the lower slip and sleeved on the central pipe.

Preferably, the inner diameter of the front end of the ball seat is 35-45 mm.

Preferably, the wear resistant particles are cast from ceramic cemented carbide as an integrally formed structure.

Adopt above-mentioned structure, its beneficial effect lies in:

the soluble rubber barrel is arranged between the upper cone and the C-shaped support ring in a matched mode, the C-shaped support ring can play a role of supporting the soluble rubber barrel, the C-shaped support ring is high in machining accuracy and excellent in sealing performance, the soluble rubber barrel can be clamped and sleeved in the middle through the upper cone and the C-shaped support ring, the soluble rubber barrel cannot be extruded and damaged from an annular space between the cone and a central pipe by extruding a split opening through extruding a split structure, the C-shaped support ring is installed at an opening of 180 degrees, the openings are not overlapped when the soluble rubber barrel is expanded in work, the performance of the protective rubber barrel is excellent, and the stable sealing performance of the whole soluble rubber barrel is guaranteed; the soluble rubber barrel is of a single-layer rubber barrel structure, and the original double-layer structure of the soluble rubber barrel is changed into the single-layer structure, so that the size of the rubber barrel can be effectively reduced, the time for dissolving the rubber barrel at the bottom of a well is greatly shortened, and the efficiency is improved; the upper slip and the lower slip are both cast into an integrally formed structure by ceramic hard alloy, the original cast iron of the upper slip and the lower slip is changed into the ceramic hard alloy, the integral strength of the slip can be effectively enhanced, slip particles are arranged at the outer ends of the upper slip and the lower slip, the integral fixity of the slip can be enhanced, the slip cannot generate deviation after being set, and the fixity is excellent; the outer end of the guide shoe is embedded with anti-abrasion particles, so that the guide shoe can be effectively prevented from rubbing with the well wall at the well bottom, the service life of the whole guide shoe is prolonged, and the fixity between the guide shoe and the central pipe is ensured; the ball seat and the pull rod are installed at the inner end of the central tube, the pull rod is sleeved at one end of the ball seat, the shear pin is arranged at the upper end of the ball seat, the shear pin can be taken out more easily after setting, and safety is greatly improved.

Drawings

FIG. 1 is a schematic structural view of a soluble bridge plug of the present invention.

In the figure: 1-central tube, 2-ball seat, 3-shearing pin, 4-bearing ring, 5-upper slip, 6-upper cone, 7-guide shoe, 8-soluble rubber cylinder, 9-C type support ring, 10-lower cone, 11-lower slip and 12-anti-abrasion particle.

Detailed Description

The invention is further explained below with reference to the figures and examples.

The utility model provides a novel soluble bridging plug, includes center tube 1,ball seat 2, shear pin 3, goes up slips 5, goes upcentrum 6, soluble packing element 8, C type support ring 9,guide shoe 7,centrum 10 down andslips 11 down, 1 inner of center tube is equipped withball seat 2, shear pin 3 is locatedball seat 2 upper end, shear pin 3 runs through in center tube 1 and inwards extends with its andball seat 2 fixed connection, the cover is equipped with slips 5 in proper order on center tube 1, goes upcentrum 6,guide shoe 7, soluble packing element 8, C type support ring 9,centrum 10 down and slips 11 down, it inlays as integrated into one piece structure by carbide to go up slips 5 andslips 11 down, soluble packing element 8 adaptation is located between centrum and type support ring 9, soluble packing element 8 is the individual layer packing element structure,guide shoe 7 outer end is inlayed and is hadabrasionproof granule 12.

The central tube 1 is sleeved with acompression ring 4, thecompression ring 4 is arranged at the front end of the upper slip 5, alower cone 10 is arranged between the C-shaped support ring 9 and thelower slip 11, and the central tube 1 is sleeved with thelower cone 10.

The inner diameter of the front end of theball seat 2 is 35-45mm, and theanti-abrasion particles 12 are cast into an integrally formed structure by ceramic hard alloy.

In order to facilitate understanding of the above-described embodiments of the present invention, the following detailed description will be given of the above-described embodiments of the present invention in a specific manner of use.

The specific working process is as follows: firstly, theball seat 2 is installed through a hydraulic or ignition setting tool, the pull rod and the bridge plug are driven to run together, so that the shear pin 3 at the upper end of theball seat 2 is broken, the upper slip 5 and thelower slip 11 can prevent the bridge plug from deviating after being seated, theupper cone 6 and the C-shaped support ring 9 clamp the soluble rubber cylinder 8 in the middle, prevent the soluble rubber cylinder 8 from extruding towards two ends and being extruded out from the annular space between theupper cone 6, thelower cone 10 and the central pipe 1 to be damaged, ensure the stable sealing performance of the soluble rubber barrel 8, the pore can be sealed up with last centrum and C type support ring 9 forsoluble packing element 8, and 7 outer ends of guide shoe are inlayed and are hadabrasionproof granule 12, avoidguide shoe 7 to produce the friction with the wall of a well in the shaft bottom, guarantee that the bridging plug safely delivers to the assigned position, guarantee the fixity betweenguide shoe 7 and center tube 1, carry out fracturing construction afterwards, and soluble fracturing ball dissolves by oneself after the fracturing construction finishes.

The foregoing is illustrative and explanatory of the invention and is not intended to limit the advantages attainable thereby, and it is within the scope of the present application for any one or more of the advantages to be realized, whether simple changes in construction and/or implementation in some embodiments are possible in the practice of the invention.

Claims (5)

Translated fromChinese

1.一种新型可溶桥塞，其特征在于：包括中心管（1）、球座（2）、剪切销钉（3）、上卡瓦（5）、上椎体（6）、可溶胶筒（8）、C型支撑环（9）、引鞋（7）、下椎体（10）和下卡瓦（11），所述中心管（1）内端设有球座（2），所述剪切销钉（3）设于球座（2）上端，所述剪切销钉（3）贯穿于中心管（1）并向内延伸将其与球座（2）固定连接，所述中心管（1）上依次套装有上卡瓦（5）、上椎体（6）、引鞋（7）、可溶胶筒（8）、C型支撑环（9）、下椎体（10）和下卡瓦（11），所述上卡瓦（5）和下卡瓦（11）均由陶瓷硬质合金镶嵌为一体成型结构，所述可溶胶筒（8）适配设于上椎体（7）和型支撑环（9）间，所述可溶胶筒（8）为单层胶筒结构，所述引鞋（7）外端镶嵌有防磨颗粒（12）。1. A novel soluble bridge plug, characterized in that it comprises a central tube (1), a ball seat (2), a shear pin (3), an upper slip (5), an upper vertebral body (6), a soluble glue A tube (8), a C-shaped support ring (9), a guide shoe (7), a lower vertebral body (10) and a lower slip (11), the inner end of the central tube (1) is provided with a ball seat (2), The shearing pin (3) is arranged on the upper end of the ball seat (2), the shearing pin (3) penetrates the central tube (1) and extends inward to be fixedly connected with the ball seat (2). The upper slip (5), the upper vertebral body (6), the guide shoe (7), the sol tube (8), the C-shaped support ring (9), the lower vertebral body (10) and the The lower slips (11), the upper slips (5) and the lower slips (11) are both inlaid with ceramic cemented carbide into an integral molding structure, and the soluble glue cylinder (8) is adapted to be arranged on the upper vertebral body ( 7) and the type support ring (9), the soluble glue tube (8) is a single-layer glue tube structure, and the outer end of the boot shoe (7) is inlaid with anti-wear particles (12).2.根据权利要求1所述的新型可溶桥塞，其特征在于：所述中心管（1）上套设有压缩环（4），所述压缩环（4）设于上卡瓦（5）前端。2. The novel soluble bridge plug according to claim 1, characterized in that: a compression ring (4) is sleeved on the central pipe (1), and the compression ring (4) is arranged on the upper slips (5). )front end.3.根据权利要求1所述的新型可溶桥塞，其特征在于：所述C型支撑环（9）与下卡瓦（11）间设有下椎体（10），所述下椎体（10）套设于中心管（1）上。3. The novel dissolvable bridge plug according to claim 1, characterized in that: a lower vertebral body (10) is arranged between the C-shaped support ring (9) and the lower slip (11), and the lower vertebral body (10) is sleeved on the central pipe (1).4.根据权利要求1所述的新型可溶桥塞，其特征在于：所述球座（2）前端内径为35-45mm。4. The novel soluble bridge plug according to claim 1, wherein the inner diameter of the front end of the ball seat (2) is 35-45mm.5.根据权利要求1所述的新型可溶桥塞，其特征在于：所述防磨颗粒（12）由陶瓷硬质合金铸造为一体成型结构。5 . The novel soluble bridge plug according to claim 1 , wherein the anti-wear particles ( 12 ) are cast in an integral structure from ceramic cemented carbide. 6 .

Images