Working supporting tools and construction methods of carbon fiber continuous sucker rod

Abstract

The invention discloses an operation supporting tool for a carbon fiber continuous sucker rod and a construction method. The operation supporting tool comprises a lower flange, a reducing coupling, aprimary blowout prevention assembly, a connection short circuit, a secondary blowout prevention assembly, an upper flange, an auxiliary tool flange and an auxiliary tool guide rail, wherein the lowerflange, the reducing coupling, the first-stage blowout prevention assembly, the connection short circuit, the second-stage blowout prevention assembly, the upper flange, the auxiliary tool flange andthe auxiliary tool guide rail are connected in sequence from bottom to top. The primary blowout prevention assembly is provided with a first blowout prevention matrix cross, the lower end of the firstblowout prevention matrix cross is connected with the reducing coupling, the upper end of the first blowout prevention matrix cross is connected with the connection short circuit, and flexible sealing units matched with the carbon fiber continuous sucker rod are arranged at the left and right ends of the first blowout prevention matrix cross. The secondary blowout prevention assembly is providedwith a second blowout prevention matrix cross, the lower end of the second blowout prevention matrix cross is connected with the connection short circuit, the upper end of the second blowout prevention matrix cross is connected with the upper flange, and shear cutting devices are arranged at the left and right ends of the second blowout prevention matrix cross. The auxiliary tool guide rail is provided with a track with predetermined radian, one end of the track is connected with the auxiliary tool flange, and the other end of the track is provided with a supporting rod. The operation supporting tool for the carbon fiber continuous sucker rod and the construction method can realize safe and reliable operation of the carbon fiber continuous sucker rod.

Description

technical field [0001] The invention relates to the technical field of oil field safety, in particular to an operation supporting tool and a construction method of a carbon fiber continuous sucker rod. Background technique [0002] In the process of oilfield development, with the deepening of development, the water cut in the well increases, and the number of deep wells and ultra-deep wells is increasing. For these deep wells (wells with a depth of 4,500 meters to 6,000 meters) or ultra-deep wells (wells with a depth of more than 6,000 meters), the formation pressure drops rapidly. If the energy of the formation is supplemented by water injection, it cannot be further exploited, and it needs to be deepened continuously. Pumps are hung to meet production needs. However, conventional rod pumps have the following limitations when lifting: [0003] (1) Increased ground investment and high energy consumption: [0004] Existing sucker rods are steel sucker rods, and their dead ...

AI Technical Summary

Problems solved by technology

[0003] (1) Increased ground investment and high energy consumption:

[0004] The existing sucker rods are steel sucker rods, and their dead weight accounts for 60%-80% of the suspension point load. Therefore, the current deep wells need to be equipped with large models and high-power motors, which require large investment and high energy consumption.

[0005] (2) The depth of the lower pump is limited and it is difficult to extract liquid:

[0007] (3) The pump hangs deeper and the eccentric wear intensifies

[0008] When the pump hanger is deepened, the length of the sucker rod will be lengthened, and the neutrality of the sucker rod will become worse, which will aggravate the problem of eccentric wear of the sucker rod and shorten the life of the sucker rod

On the whole, the ordinary sucker rod and its supporting technology in the prior art cannot meet the needs of deep or ultra-deep wells

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