Mechanical-hydraulic integrated releasing device

An integrated, machine-hydraulic technology, applied in wellbore/well components, earthwork drilling and production, etc., can solve the problems of poor tensile capacity of mechanical drop and low reliability of hydraulic drop, and achieve the effect of enhancing tensile capacity

Active Publication Date: 2017-03-29
CHINA PETROLEUM & CHEM CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a machine-hydraulic integrated hand release device, which effectively combines the mechanical relea

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  • Mechanical-hydraulic integrated releasing device

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[0023] The embodiments of the present invention will be described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise stated, "a plurality" means two or more; the terms "upper", "lower", "left", "right", and "internal" "," "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addit...

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Abstract

The invention relates to the technical field of oil field oil extraction, in particular to a mechanical-hydraulic integrated releasing device. The mechanical-hydraulic integrated releasing device comprises an upper joint, a lower joint and a pawl. The upper joint and the lower joint are connected to the two ends of the pawl correspondingly. A releasing sleeve capable of moving in the axial direction of the pawl is arranged on the outer side of the pawl in a sleeving manner. A step is arranged on the outer wall of a ratchet of the pawl. A groove matched with the step is formed in the inner wall of the releasing sleeve. The step and the groove cooperate to limit the pawl. A releasing sleeve upper end is arranged between the releasing sleeve and the upper joint, one end of the releasing sleeve upper end is inserted in the releasing sleeve, and the other end of the releasing sleeve upper end is arranged on the outer portion of the upper joint in a sleeving manner and connected with the upper joint through a start pin. A pressure cavity is formed between the upper joint and the releasing sleeve upper end, a hydraulic cavity is formed in the upper joint, and two pressure transmission holes communicating with the pressure cavity are symmetrically formed in the side wall of the hydraulic cavity in the radial direction. According to the mechanical-hydraulic integrated releasing device, the problems that in the prior art, a mechanical releasing device is poor in resistance to tension, and the reliability of a hydraulic releasing device is not high are solved.

Description

Technical field [0001] The invention relates to the technical field of oil production, in particular to a mechanical-hydraulic integrated hand-off device, and more particularly to a safety hand-off joint used in oil and gas well completion string. Background technique [0002] The function of the safety release joint used in oil and gas well completion string is that when the lower completion string is stuck and cannot be lifted, the safety release joint can be used in the safe release position to lift the upper string, thereby reducing Small loss, and bring convenience to later operations. [0003] At present, there are two main types of safety release joints used during well completion: one is mechanical release. This type of safety release has the advantages of convenient operation, high reliability, and large tool diameter, but its tensile strength is poor. , Resulting in a block or jam in the process of running down the completion string, it is easy to lose hands early due to...

Claims

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Application Information

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IPC IPC(8): E21B23/00
CPCE21B23/00
Inventor 邹伟张梦华刘练王博伟樊凌云谢进周生福李文霞杨坤
Owner CHINA PETROLEUM & CHEM CORP
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