Overview

The Y457R-88-70 Dissolvable Bridge Plug serves as a temporary barrier for oil, gas, water, and other potential leak zones. It is designed for versatility and facilitates high-pressure hydraulic fracturing in the production zones above the plug. Currently, its predominant application is in segmented fracturing and reservoir enhancement techniques, specially tailored for shale gas and tight gas wells.

Bridge Plug Overview:

① The plug incorporates a bidirectional anchoring design complemented by a compression-type sealing approach.

② Thoughtfully equipped with an anti-premature seating system, it significantly diminishes potential risks of unintended early deployment during well insertions.

③ Sporting a unified anchoring mechanism, it bolsters safe well entries and showcases superior anchoring prowess.

④ The terminal section boasts a flow-enhancing groove, adeptly catering to jetting procedures on-site.

⑤ The plug's seal safeguard boasts a dual-direction, dual-layer protective cuff, adeptly preserving its rubber constituents, ensuring sealing efficiency up to 70MPa.

⑥ With its straightforward architecture and maximal diameter located at its extremities, it ensures minimal friction with the casing, promoting smooth descents.

⑦ Our enterprise tailors material choices, leveraging metals and rubbers of varied dissolution rates, to adeptly meet operational needs spanning from 30-150℃.

Operating Mechanism

The Y457R-88-70 dissolvable bridge plug and the perforating apparatus and seating mechanism are deployed into the well via an electrical cable. A ground-operated device ignites the seating instrument as the equipment assembly is accurately positioned at the designated sealing point through a pumping action. The combustible material generates propulsion upon ignition, instigating the seating cylinder's movement. This activity propels the barrier ring downwards, inducing the rubber sleeve to contract and expand, ensuring an effective seal. Concurrently, dual-direction anchoring features engage to solidify the grip. Once the plug achieves its desired position, the force exerted by the seating tool surpasses the shear strength of the designated pin, leading to its detachment facilitating the plug's independent positioning.

Field Application Overview

Throughout 2022, the Changqing Oil Field employed 662 bridge plug sets across 181 well operations. These activities predominantly took place in four sectors: Yulin, Jingbian, Ansai, and Sulige. Most operations utilized clean water, but a blend of clean water and flowback fluid was preferred in certain circumstances, showcasing a mineralization level between 200 and 2000. Operational well temperatures fluctuated from 80-120℃. As of April 25, 2023, the oil field had incorporated 137 bridge plug sets over 39 well operations.

Case Study #1: On March 29, 2023, at Changqing Oil Field's Yulin Project Department, during the operation of Well Double 38-63H3, Section 6, our company deployed the Double Slip 88 Dissolvable Bridge Plug (Serial No. 2022120242). The insertion occurred at 16:44, with a seating depth of 2819 meters. Notably, the maximum pumping velocity in the vertical section reached 5800m/h, while it reached 4500m/h in the horizontal segment. The pumping medium employed was clean water. At 17:36, the bridge plug underwent ignition for seating, resulting in a tension drop from 7.4KN to 6.7KN. Substantial wellhead vibrations were observed. Following this, the tool string was raised, and the perforation process proceeded seamlessly, affirming the successful seating of the bridge plug. At 18:14, the sealing ball was introduced into the well, with ball delivery commencing at 18:23. By 18:40, the ball had reached its designated position. The operation achieved a maximum pumping rate of 2m³/min, with the final delivery rate settling at 1.96m³/min. When the total liquid volume reached 23.6m³, the pressure escalated from 25.64MPa to 38.05MPa. Notably, clean water served as the pumping fluid, and the bridge plug remained in the well for a total of 1 hour.

Example 2: On April 1, 2023, at Changqing Oil Field's Jingbian Project Department, during the execution of operations in Well Jing 76-0H1, Section 3, our company deployed the Double Slip 88 Dissolvable Bridge Plug-S (Serial No. 2022112550). The insertion occurred at 11:40, and the seating depth was 3680 meters. Notably, the vertical section allowed for a maximum velocity of 5800m/h, while the horizontal segment accommodated up to 4400m/h. Clean water served as the pumping fluid. At 12:30, the bridge plug underwent ignition for seating, resulting in a tension reduction from 7.4KN to 6.8KN. Significant wellhead vibrations were evident. Subsequently, the tool string was raised, and the perforation process proceeded without issue, affirming the successful seating of the bridge plug. At 1:28, the sealing ball was introduced into the well, with ball delivery commencing at 1:35. By 2:00, the ball had reached its designated position. The operation attained a maximum pumping rate of 1.5m³/min, ultimately settling at a final delivery rate of 1.19m³/min. With a total liquid volume reaching 24.82.m³, the pressure surged from 28.6MPa to 52.3MPa. Clean water was the selected pumping fluid, and the bridge plug remained in the well for a total of 2 hours.

Case Study #3: On April 6, 2023, at Changqing Oil Field's Sulige Project Department, during the execution of operations in Well Peach 2-28-36H2, Section 9, our company employed the Single Slip 83 Dissolvable Bridge Plug (Serial No. 2023021009). It was inserted into the well at 12:10, with a seating depth of 3756 meters. Notably, the vertical section allowed for a maximum pumping velocity of 5000m/h, while the horizontal segment accommodated up to 3600m/h. Clear water served as the pumping fluid. At 13:20, the bridge plug underwent ignition for seating, reducing tension from 7.6KN to 7.1KN. Significant wellhead vibrations were evident. Subsequently, the tool string was raised, and the perforation process proceeded without issue, affirming the successful seating of the bridge plug. At 14:20, the sealing ball was introduced into the well, with ball delivery commencing at 14:32. By 14:55, the ball had reached its designated position. The operation attained a maximum pumping rate of 1.3m³/min, with the final delivery rate also at 1.3m³/min. With a total liquid volume reaching 27.2m³, the pressure surged from 25MPa to 51MPa. Clear water was the selected pumping fluid, and the bridge plug remained in the well for a total of 3 hours.

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