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A top drive cement head

A cement head and waist technology, which is used in wellbore/well components, earthwork drilling, sealing/packaging, etc., can solve the problems of low comprehensive capacity, poor applicability, and many specifications of cement heads, and achieve torsion-bearing capacity. The effect of high height, large hook load, avoiding the risk of climbing wiring and operation

Active Publication Date: 2018-04-27
BAOJI PETROLEUM MASCH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a top-driven cement head, which solves the problems of many cement heads in the prior art, poor applicability, and low comprehensive ability

Method used

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  • A top drive cement head
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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] refer to figure 1 , the overall structure of the device of the present invention is that, from top to bottom, it includes a rotating assembly 10, an upper rubber plug release assembly 20, a lower rubber plug release assembly 30, and an indicator assembly 40 connected in sequence, and each assembly is sequentially connected by The components are sealed; in addition, the cylinder and accumulator ( figure 1 not shown), the cylinder is used to rotate the rotary valve A202 in the upper rubber plug release assembly 20 and the rotary valve B302 in the lower rubber plug release assembly 30, and the accumulator is used to provide power (high pressure gas) to the cylinder.

[0038] refer to figure 2 The structure of the rotating assembly 10 is to include an upper joint 101 with a central through hole, the upper joint 101 is used as the main s...

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Abstract

The invention discloses a top driving cement head. The top driving cement head comprises a rotation assembly, at least one upper rubber plug releasing assembly and an indicator assembly which are sequentially in sealing connection from top to bottom through connecting assemblies. The structure of the rotation assembly is that the rotation assembly comprises an upper joint provided with a center through hole; a cylinder sleeves the periphery of the waist of the upper joint; the waist of the upper joint is symmetrically provided with two injection ports along the diameter direction; the outer end of each injection port is fixedly connected to the cylinder through an injection head; an upper bearing and a lower bearing are arranged between the inner wall of the cylinder and the periphery of the waist of the upper joint; an inner ring of the upper bearing and an inner ring of the lower bearing sleeve the periphery of the upper joint; an upper end cover and a lower end cover are respectively mounted at the upper end port and the lower end port of the cylinder; and the lower end port of the upper joint is connected to a diverter in a sleeving manner. The top driving cement head is simple in structure and high in adaptability, and works reliably.

Description

technical field [0001] The invention belongs to the technical field of petroleum machinery and equipment, and is used for cementing operations of oil and gas wells, in particular to a top-driven cement head. Background technique [0002] At present, fixed, semi-submersible and floating drilling platforms are mainly used in offshore oil and gas development. However, the existing cement head has a large turning space, low tensile strength, and weak torsion bearing capacity. It can only put in a single type of rubber plug (drill pipe rubber plug or casing rubber plug, etc.), and cannot cast and seal the ball. The operation process needs to be stopped. Pumps and other disadvantages cannot meet the needs of offshore oil and gas development, and cannot fully meet the needs of deep and ultra-deep wells on land. At the same time, the cementing pressure is getting higher and higher. Conventional cementing requires the operator to work in close quarters, which not only bears the risk...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13
Inventor 惠坤亮张宏桥阎永宏王德贵董毅军
Owner BAOJI PETROLEUM MASCH CO LTD
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