KR850006726A - Forceps assembly - Google Patents

Abstract

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Description

Forceps assembly

As this is a public information case, the full text was not included.

1 is a schematic plan view showing selected components of a support clamp according to the invention.

* Explanation of symbols for main parts of the drawings

20: tong assembly 22: support tongs

24: power tong 34: tool joint

58: free clip unit 60: die

76: power gear 126: tight arm

Claims (13)

A power tong having a longitudinal axis and also having means for gripping, rotating and positioning the top of the tool joint together with the central axis of the tool joint aligned with the longitudinal axis; Located at the bottom of the power tongs, the bushing includes a longitudinal axis, a rear face and two side faces, and a rigid support of the lower part of the tool joint between one of the side faces and the rear face and the die teeth. Means for engaging the lower part of the tool joint with the die teeth so that the lower part is positioned with the central axis of the tool joint which is inconsistent with the longitudinal side of the support tongs and a backup clamp having the die with the die teeth. tong); Upper and lower parts comprising means for interconnecting the power tongs and the support tongs and supporting one tongs from the other tongs, the means for axially limited displacement and limited rotation of the support and tongs relative to each other; Clamp assembly for combining and pulling out threaded tubular tool joints with a central axis. 2. The tool joint of claim 1, wherein the longitudinal axis of the power tongs and the longitudinal axis of the support tongs are generally coincident with each other up and down, these longitudinal axes of the tool joint being firmly supported between the die and the rear and side surfaces. A tong assembly isolated laterally on the bottom. The tong assembly of claim 1, wherein the bushing is interchangeable and the side surfaces are generally perpendicular to the rear surface. 2. The die of claim 1 wherein the die is self-energizing with respect to the tool joint when a lower portion of the tool joint contacts the die teeth and the rear and side surfaces and the lower portion rotates in a predetermined direction. A tong assembly contained in a jaw in the form of a cap. 5. The tongs assembly of claim 4, wherein the tongs are positioned in a shape having a cam angle between about 3 and 7 degrees. The support clamp according to claim 1, wherein the interconnecting means comprises: a pair of flexible arms extending from the rear position of the power tongs to the front position of the support tongs, an extension at the rear of the support tongs having a square cross section; A tong assembly rigidly attached to a power tong and comprising a gusset having a square opening that can be rotated and rotated through a limited angular rotation of about 3 ° to the extension. A power tong having a body, a front opening in the body for receiving a tubular joint, and means for gripping and rotating the tubular joint in the opening; A main housing supporting a bushing and a movable free gripper, wherein the bushing includes a hole for receiving the tubular joint partially bordered by a rear face and two sides, and the free clipper A support clamp adapted to be selectively positioned to engage the tubular joint received within the bushing and to support the tubular member secured between the forceps and one of the rear face and the sidewall; The tongs are movable supportable from the power tongs and the main housings and bushings of the support tongs are rotatable at a predetermined angle relative to the power tongs in a plane substantially perpendicular to the central axis of the tubular joint. Consisting of means for interconnecting the tongs; Clamp assembly for gripping and rotatably engaging a threaded tubular joint with an elongated central axis. 8. The clamp assembly of claim 7, wherein the bushing is removably mounted to the support tongs, wherein the aperture in the bushing is in the form of a generally channel each of the side surfaces generally perpendicular to the rear face. The tongs assembly of claim 8, wherein the bushing includes a window for moving the free tongs into and out of the hole. 10. The pair of flexible arms of claim 9, wherein the interconnecting means is attached to the rear portion of the power tong on one side and attached to the front portion of the support tong on the other side and around the axis perpendicular to the central axis. A tong assembly consisting of a reinforcing plate which allows a limited rotational movement of about 3 ° between the power tongs and the support tongs. 8. The power tool of claim 7, wherein the power tong includes a longitudinal axis of the power tong and the support tong includes a longitudinal axis of the support tong, and the shaft and the shaft are equal to the length when the tubular joint coincides with the bushing. If the central axis is coincident and the tubular joint is positioned in contact with one of the free clamping part and the rear and side surfaces, the elongated central axis of the tubular joint coincides with the central axis of the power clamp and the central axis of the support clamp Tongs assembly positioned axially isolated from the tongs assembly. The line and the point extending from the pin connecting point (b) through the central axis of the tubular joint when the free clamping part and the tubular joint contact at the primary contact point (a). A cam angle is formed between the other line extending from (b) through the point (a), and the cam angle is connected to the support clamp through the pin connection point (b) such that the cam angle is between about 3 ° and 7 °. Clamp assembly rotatably attached. 8. The device of claim 7, wherein one end is hingedly attached to the support tong and the other end is pivotally attached to the means for generating movement of the support to the tubular joint. And a power cylinder for rotating the flattened arm around the other end, wherein the flattened arm is shaped such that its length can be expanded and retracted. ※ Note: The disclosure is based on the initial application.