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device arranged to attach a pipe rod to a tubular body

A technology for attaching devices and tubular bodies, applied in the direction of drill pipes, casings, drill pipes, etc., which can solve the problems of expensive, permanent deformation of the contact surface of downhole units, etc.

Active Publication Date: 2016-11-30
ACE OIL TOOLS AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such attachment may require large and expensive tools, and some attachment methods (such as pressing) often cause permanent deformation of the contact surfaces of the associated downhole unit

Method used

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  • device arranged to attach a pipe rod to a tubular body
  • device arranged to attach a pipe rod to a tubular body
  • device arranged to attach a pipe rod to a tubular body

Examples

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Embodiment Construction

[0041] In the figures, reference numeral 1 designates a sleeve in the form of an elongated pipe provided with several functional elements 2, in figure 1 and figure 2 The middle functional element 2 is shown as a rib-like stabilizing element protruding from the jacket surface 12 of the pipe rod 1 . The stem 1 is arranged to releasably surround the tubular body 3 (in figure 1 and figure 2 Schematically shown as part of the bushing). exist figure 1 In this case, the pipe rod 1 is fixed by means of two separate support sleeves 1 a, for example when it is desired that the pipe rod 1 with the functional element 2 should be rotatable on the tubular body 3 because the support sleeves 1 a are axially supported The two ends 11 of the pipe rod 1 are placed in such a way that in this embodiment, the two ends of the pipe rod have straight end faces 111 . The support sleeve 1a is attached to the tubular body 3 in a rotationally rigid manner such that the tubular stem 1 can rotate fre...

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PUM

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Abstract

Attachment device for an element (1) arranged on a downhole tubular body (3), wherein the end (11) of a sleeve (1a) arranged around a part of the tubular body (3) is provided with an attachment ( 13) The attachment portion comprises at least one clamping element (1312, 1312') arranged to abut against a conical abutment (142) surrounding the joint sleeve (14) via an abutment surface (1315) Adjacent and radially displaced.

Description

technical field [0001] The present invention relates to an attachment device for a pipe stem provided on a downhole tubular body. Background technique [0002] In the oil and gas industry, elements attached to downhole tubular bodies, such as production tubing, are used for a variety of purposes. One example of such elements are so-called stabilizers or centralizers placed on the outside of the tubular body. The purpose of the stabilizer may be to ensure that the downhole unit is stably centered in the surrounding tubular body. For example, stabilizers on the casings are used as spacers ensuring sufficient radial space between the two casings for the cement to be introduced in a satisfactory manner. As with other downhole units, stabilizers may be used to reduce radial movement, eg especially for elongated units like drill tool assemblies (BHA). In one embodiment, the stabilizer is fixedly arranged on and attached to the sheath surface of a relatively short mandrel, where...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10
Inventor K·E·斯泰因
Owner ACE OIL TOOLS AS