The Y257R-103-70 Dissolvable Bridge Plug provides temporary zonal isolation, effectively sealing off sections with oil, gas, water, or potential leaks. It facilitates high-pressure hydraulic fracturing operations in the productive strata positioned above the plug. This innovative tool is primarily employed for enhancing shale gas formations.
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Specifications/Parameters
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5 1/2″
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1. Material Composition: The main body utilizes a magnesium-aluminum alloy engineered for rapid dissolution, ensuring smooth wellbore accessibility.
2. Granular Slip Teeth Design: Optimally designed to guarantee foundational support while ensuring no interference with subsequent operations.
3. Physical Dimensions: Boasts an outer diameter of 103mm, tailored for compatibility with 5.5-inch casings. The inner diameter measures 43mm, strategically crafted to enhance dissolution and promote effective flowback. With a concise length of 374mm, its streamlined, compact structure further facilitates dissolution.
4. Pressure Resilience: Demonstrates robust resistance with a threshold of up to 70MPa, emphasizing its superior pressure-bearing capability.
5. Adaptability to Well Conditions: Operating efficiently within a temperature bracket of 30-150℃, it aligns seamlessly with the varied conditions across the Changqing oil fields.
6. Operational Longevity: Offers an impressive effective sealing duration of 24 hours, paving the way for prolonged work phases.
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Applicable Casing Inner Diameter
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114.3mm
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Bridge Plug Max. Outer Diameter
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103mm
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Bridge Plug Min. Inner Diameter
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43mm
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Bridge Plug Length
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374±3mm
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Dissolvable Ball Diameter
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65mm
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Rated Differential Working Pressure
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70MPa
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Operational Temperature Range
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30~150℃
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Associated Setting Tool
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Baker20#
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Push Sleeve Outer Diameter
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102mm
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Designated Release Force
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14-16t
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Effective Seal Duration
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24h
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Time for Anchor Disengagement
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36h
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Rate of Dissolution
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95%
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Drillability
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Yes, Can Be Drilled
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Bridge Plug Overview:
① Designed with simplicity in mind, facilitating easy insertion into the well.
② The Absence of rubber sleeves diminishes the potential risks associated with drilling and grinding, leading to significant time and cost savings during operations.
③ The plug's main body and slips are dissolvable, ensuring an unobstructed full-bore production capability.
④ The high-strength dissolvable metal composition demonstrates resilience, bearing pressures up to 70Mpa, thereby adhering to rigorous sealing standards.
⑤ The tool's design allows flexibility, with no constraints tied to the continuous tubing length, enabling endless deployments.
⑥ Its rapid and efficient dissolution process optimizes costs, particularly in terms of wellbore access expenses.
The setting tool is activated for sealing when positioning the Y257R-103-70 dissolvable bridge plug at its designated location within the well. The tool's setting sleeve engages with the segmenter, specifically Cone 1, prompting its downward motion. This movement facilitates the metal sealing ring and accompanying gasket to expand, ensuring a tight seal within the casing. Simultaneously, Cone 2, in tandem with Cone 1's movement, activates the slips to expand, providing a secure anchoring mechanism for the casing. In this process, the shear pin is strategically cut, allowing for the seamless release of the setting tool.
Field Application Overview
The Y257R-103-70 dissolvable bridge plug has been predominantly deployed across locations such as the Changning oilfields, Shunan gas mine, Sichuan shale gas, and the Zhejiang oilfields. A cumulative count indicates the application of over 400 sets across these diversified areas, with specialized plug variations tailored to fit distinctive well conditions, including but not limited to standard, water-soluble, and special coated variants.
Case Study #1: During the operation of well YS108H8-6 in its second segment, Wewodon's 103R model was utilized. The tool string was lowered into the well at 17:25, targeting a predetermined sealing depth of 4125m. The pumping operation commenced at 18:10 from the 2200m marker. The tool exhibited a peak speed of 5000m/h in the vertical section and maintained an average pace of 3800m/h in the horizontal stretch. The upper limit of pumping volume was registered at 2.2m³/min. The pumping reached its designated position by 19:00, with the activation procedure following at 19:10. This process saw a tension modulation from 7.0KN down to 6.3KN. Subsequent tool string retrieval for perforation was executed without any hindrances, suggesting an effective sealing of the bridge plug. At 11:00, a dissolvable ball of 65mm diameter was introduced, progressing to the ball deployment phase at 11:57. A notable surge in pressure was recorded by 12:15, elevating from 53.7MPa to 55.9MPa.
Case Study #2: During operations at well 201H4-5, segment 18, Wewodon's 103R-A variant was the model of choice. At 10:20, the tool string was initiated into the well, targeting a sealing depth of 4454m. The pumping phase was launched at 19:55, with operations commencing from the 3150m mark. Speed metrics indicated a zenith of 5800m/h in the vertical stretch and a maintained average of 4400m/h across the horizontal span. Pumping displacement was capped at 2m³/min. By 11:35, the pumping achieved its predetermined location, and the ignition was promptly activated at 11:36. A noted tension adjustment from 8.6KN to 8.1KN was observed. Following this, the tool string's routine retrieval for perforation maneuvers faced no challenges, confirming a successful sealing of the bridge plug. Ball introduction was conducted at 13:02, progressing to the delivery phase at 13:42. By 13:56, the ball was adeptly positioned in its designated seat. The operational capacity exhibited a maximum volume displacement of 5m³/min, stabilizing at 2m³/min upon the ball's optimal placement. Comprehensive measurements denoted a wellbore volume of 45.7m³, juxtaposed with a total liquid volume of 48.2m³. A significant pressure augmentation from 70MPa to 82MPa was recorded, with the bridge plug's well-entry procedure spanning 3 hours. For the ball pumping, clean water was utilized, marking the onset of the displacement phase.
