Pressure expansion large-diameter sand prevention packer
A packer and large-diameter technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc. The restoring force is not easy to blast, the service life is long, and the cost saving effect
Inactive Publication Date: 2019-01-04
JIANGSU WANMA MACHINERY MFG
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Problems solved by technology
At present, fracturing packers are often used in oil field fracturing operations. Due to the relatively small diameter of the existing fracturing packers, the displacement during fracturing is not enough, which makes construction difficult and fracturing cannot achieve the expected effect. Therefore, We have developed a large-diameter sand control packer with expansion pressure
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[0015] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.
[0016] Such as figure 1 As shown, a large-diameter sand control packer with expansion pressure is characterized in that it includes a packer main unit 1, a core pipe 4 and a lower joint 5, and the upper end of the core pipe 4 is sleeved with the packer main unit 1 and passed through Threaded fixed connection, the other end is sleeved with a lower joint 5 and fixedly connected through the thread, the middle end of the core tube 4 is sleeved with a high-temperature rubber cylinder 3, and the high-temperature rubber cylinder 3 is provided with three layers of high-elastic steel wires, the first-stage cylinder body 2 and The secondary cylinder 8 is sleeved on the core pipe 4. The inner surfaces of the primary cylinder 2 and the secondary cylinder 8 are provided with connecting threads. One end of the primary cylinder 2 is connected to the packer main unit 1...
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Abstract
The invention discloses a pressure expansion large-diameter sand prevention packer. The pressure expansion large-diameter sand prevention packer comprises a packer body unit, a core pipe and a lower joint. The previous end of the core pipe is fixedly connected with the packer body unit through a thread, and the other end of the core pipe is fixedly connected with the lower joint through a thread.The middle of the core pipe is sleeved with a high-temperature rubber cylinder, and three layers of high-elastic steel wires are arranged in the high-temperature rubber cylinder. The core pipe is sleeved with a first-stage cylinder body and a second-stage cylinder body, and connecting threads are arranged on the inner surfaces of the first-stage cylinder body and the second-stage cylinder body; one end of the first-stage cylinder body is connected with the packer body unit through a thread, and the other end of the first-stage cylinder body is connected with the high-temperature rubber cylinder through a thread; one end of the second-stage cylinder body is fixedly connected with the high-temperature rubber cylinder, and the other end of the second-stage cylinder body is connected with thelower joint through a thread; and a sand prevention net is arranged in the joint, a floating device is arranged on the lower joint in a sleeving mode, a thread is arranged on the outer surface of thefloating device, and the thread arranged on the outer surface of the floating device is matched with the thread on the inner surface of the second-stage cylinder body. The pressure expansion large-diameter sand prevention packer has the advantages of stable structure, large displacement and sand prevention.
Description
technical field [0001] The invention belongs to an oil production tool for an oil field, and mainly relates to a high-temperature, high-pressure expansion packer with a large diameter and a large displacement used in the fracturing construction of heavy oil reservoirs and high pour point oil reservoirs. Background technique [0002] The average recovery rate of oilfields developed by water flooding in China is only 32%, and 68% of geological reserves are difficult to recover by conventional development techniques. New technologies are needed to further improve the recovery rate of oilfields. At present, fracturing packers are often used in oil field fracturing operations. Due to the relatively small diameter of the existing fracturing packers, the displacement during fracturing is not enough, which makes construction difficult and fracturing cannot achieve the expected effect. Therefore, We have developed a large diameter sand control packer with expansion pressure. Conten...
Claims
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Login to View More IPC IPC(8): E21B33/126
CPCE21B33/126E21B33/1208
Inventor 刘冬林张斌
Owner JIANGSU WANMA MACHINERY MFG