Ball thrower for liner cementing liner seat and its control method
A technology for liner cementing and pitcher, which is applied in the field of pitcher, can solve problems such as temporary failure of remote control of pitcher, and achieve the effects of wide range of use, guaranteed reliability and simple operation.
Active Publication Date: 2017-01-04
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] The object of the present invention is to: aim at the above existing problems, to provide a liner cementing liner seat hanger and its control method that can be matched with the cement head, mainly used to solve the problem of remote control of the ball launcher in the prior art. To control the problem of temporary failure, there is no need to remove the cement head and manually throw the ball again, ensuring the reliability of the cementing and cementing operations
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[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0035] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features that are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0036] Such as Figure 1 to Figure 4As shown, the ball thrower for hanging the liner seat of the liner cementing well of the present invention includes an assembly set 21 and a cavity body 17; the cavity body 17 is arranged in the assembly set 21 to form an accommodating cavity; The set screw 11 passes through the cavity body 17 outwardly from the containing cavity and is connected with the reciprocating push mechanism. The reciprocating push mechanism includes a cy...
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The invention discloses a ball thrower for hanging a liner seat for liner cementing and a control method thereof, belonging to the technical field of oil and natural gas exploitation. The present invention includes an assembly kit and a container body; the container body is arranged in the assembly kit to form a container cavity; the screw provided on the container body passes through the container body from the container cavity outward and is connected with the reciprocating push mechanism The cavity body is provided with a plurality of brackets located in the cavity, and the brackets are provided with holding claws, and the ends of the screws cooperate with the holding claws to catch the seat hanging ball in the cavity. The present invention is mainly used to solve the problem of remote control temporary failure of the ball feeder in the prior art, without removing the cement head and manually throwing the ball again, so as to ensure the reliability of the ball feeding and cementing operation.
Description
technical field [0001] The invention relates to the technical field of oil and natural gas exploitation, in particular to a ball feeder on a rotary cement head during rotary liner cementing. Background technique [0002] Well cementing is to use cementing equipment to inject cement into the outer annular space of the casing in the oil and gas well where the casing is run, so as to effectively seal between the casing and the formation. This process requires the use of a liner hanger to connect the liner (casing) to the upper casing. Most liner hangers can be classified according to their seating mechanism, either hydraulic or mechanical Seat type. The seating mechanism of the hydraulic seating type stern tube hanger is to realize the seating through the fluid pressure difference of the hydraulic cylinder in the stern tube hanger. In order to prevent the tailpipe from being accidentally seated during lowering, the hydraulic cylinder is secured by shear pins. Normally the cy...
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IPC IPC(8): E21B33/13E21B23/01
Inventor 王国荣张敏何霞胡刚蒋龙楚飞陈宝康
Owner SOUTHWEST PETROLEUM UNIV