47results about How to "Improve workover efficiency" patented technology

The invention discloses an iron driller. The iron driller comprises a rotating translational stretching mechanism and a tongs assembly. The tongs assembly is composed of a support, back tongs, main tongs and spinning tongs; the rotating translational stretching mechanism is composed of a base, a rotating device, a translation device and a support arm assembly; one end of the support arm assembly is connected with the support and the other end of the support arm assembly is connected with the translation device which is connected with the base through the rotating device; the main tongs, the back tongs and the spinning tongs are connected with the support; the main tongs positioned above the back tongs are hinged to the back tongs; and the spinning tongs are mounted above the main tongs and the back tongs. By the aid of the iron driller, the automation of the overall process of attaching and detaching drilling tools is achieved, the automation level of drilling and repairing wells is improved, and the working efficiency and security are improved.

The invention discloses a centralizing string and a restoring string for horizontal well casing pipe dislocation and a restoring process of the centralizing string and the restoring string so as to solve the problem that existing dislocation wells with the casing pipe dislocation and inner diameter coincidence degree ranging from 30-50% in an oil field are incapable of being centralized and restored. The centralizing string comprises a booster, a hydraulic anchor and an oil pipe, and an eccentricity centralizing hanger, the booster and the hydraulic anchor are sequentially connected through the oil pipe. The restoring string matched with the centralizing string in use comprises an oil pipe and a casing pipe restoring tool which are connected, an insertion pipe is connected at the bottom of a cylinder of the casing pipe restoring tool, and a casing pipe is inserted into an outer positioning cylinder of the eccentricity centralizing hanger. The restoring process is particularly applicable to thermal recovery horizontal well casing pipe dislocation restoring works and similarly applicable to other casing pipe dislocation horizontal wells. The centralizing string and the restoring string and the restoring process can be used for effectively restoring the dislocation casing pipe at a horizontal segment of the horizontal well, have no chemical pollution to an oil layer and are wide in application range, simple in construction steps and capable of effectively reducing production cost.

The invention relates to a workover device in drill floor type, used in non-manned operation under the oil well, wherein it is formed by driving control room 1, thick support post 2, discharge tube 3, lifter 4, amplitude-variable hydraulic cylinder 5, support post base 6, well-open hydraulic blowout preventer 7, drill floor hydraulic base 8, fixing hydraulic clamp disc 9, back tyre, back driving bridge 10, hydraulic clamper 11 with flexible sliding channel 11, hydraulic gear box 12, high-pressure gear pump 13, hydraulic torque converter 14, front tyre, front driving bridge 15, engine 16, frame and drill floor 17; the front part of frame 17 is arranged with driving control room 1, engine 16, hydraulic torque converter 14, hydraulic gear box 12 and high-pressure gear pump 13, while the back part has fixing hydraulic clamp disc 19, support post base 6, and hydraulic clamper 11; the support post base 6 is mounted with thick support post 2, discharge tube 3 and lifter 4. The invention can automatically set discharge tube and improve the working efficiency.

The invention provides a special eccentric correcting hanger for a casing fracture horizontal workover sleeve, which solves the difficulty that the traditional fractured well with front casing fracture internal diameter coincidence degree of 30-50% in an oil field cannot be corrected. The special eccentric correcting hanger for the casing fracture horizontal workover sleeve comprises a guide head, a hydraulic anchoring hanging device and an eccentric locating and correcting device, which are connected with one another by conversion joints, wherein the hydraulic anchoring hanging device comprises a seat seal locating mechanism and an inserted unsealing mechanism; the seat seal locating mechanism is mounted in the inserted unsealing mechanism and connected by a limiting pin; a counterweight mounting vertical slot is fixedly formed in an inner circle of a circumferential limiting inner cylinder of the eccentric locating and correcting device; a counterweight strip is mounted in the counterweight mounting vertical slot; and the lower end of the counterweight strip is connected with the guide head. After being put into a horizontal well section, one side of the special eccentric correcting hanger mounted with the counterweight strip is always positioned on downside, so that the bottom tip of the guide head can be accurately inserted into a lower casing of the fracture together with the special eccentric correcting hanger according to a preliminary determined casing fracture direction, a restoring passage of the fractured casing is broken through and the production is made again after restoring.