Abstract
The invention relates to a high-temperature high-pressure large-drift-diameter hydraulic sleeve packer which comprises an inner central tube, a combined sealing rubber cylinder part, a setting piston part, a locking part, a slip set and an outer central tube, wherein the combined sealing rubber cylinder part, the setting piston part, the locking part, the slip set and the outer central tube are connected to the inner central tube in a sleeved mode. The front end of the inner central tube is connected with an upper connector in a screwed mode, a release sleeve is connected to the outer side of the upper connector, and the lower portion of the release sleeve is connected with a balancing connector in a screwed mode. A core sleeve is sleeved with the combined sealing rubber cylinder part, the inner central tube is sleeved with the core sleeve, and the upper end of the core sleeve is connected with the balancing connector in a screwed mode. The combined sealing rubber cylinder part comprises a rubber cylinder and a metal net, an upper guide ring and a lower guide ring butt against the upper side of the combined sealing rubber cylinder part and the lower side of the combined sealing rubber cylinder part, the upper guide ring is connected with the balancing connector in a screwed mode, the lower guide ring is connected with an oil drainage sleeve in a screwed mode, and the lower portion of the oil drainage sleeve is sequentially connected with a cylinder sleeve, the locking part and the slip set in a screwed mode. The setting piston part is arranged in the cylinder sleeve, the slip set is fixed into a slip sleeve through an upper cone and a lower cone, and the outer central tube is sleeved with the slip set in a wrapping mode. The high-temperature high-pressure large-drift-diameter hydraulic sleeve packer is high in pressure bearing capacity, high in temperature resistance, large in drift diameter, high in overall stability and long in effective separation time.
Description
technical field
[0001] The invention relates to a high-temperature, high-pressure and large-diameter casing hydraulic packer used in the process of reservoir reconstruction measures and production of oil and gas wells. Background technique
[0002] The function of the casing packer is to separate the oil casing at a certain depth downhole and protect the casing and the wellhead when the high-pressure gradient well undergoes reservoir stimulation such as acid fracturing and high-pressure well production. With the continuous development of exploration and development, oil and gas wells are getting deeper and deeper, and the pressure gradient of ground breaking is getting higher and higher, so the requirements for pressure bearing and temperature resistance of packers are getting higher and higher. At present, the commonly used domestic casing packers have a maximum pressure difference of 52MPa and a maximum temperature resistance of 150°C. The high-temperature and high-pressur...
