US965182A - Tool for lowering and raising well-tubes. - Google Patents

Description

P. HARDY. TOOL FOR LOWERING AND RAISING WELL TUBES.

APPLICATION FILED 811F124, 1909.

Patented July 26, 1910.

INVENTOR Pa? 0/ Hardy.

ATTORNEY WITNESSES: G. 0. Ja /m W T THE NORRIS PETERS 9a.. wAsmNcrou,.o. c.

PAUL HARDY, 0F WALNUT SPRINGS, TEXAS.

TOOL FOR LOWERING AND RAISING WELL-TUBES.

Specification of Letters Patent.

Patented July 26, 1910.

Application filed September 24, 1909. SETiH-INO. 519,440.

To all whom it may concern:

Be it known that I, PAUL HARDY, a citizen of the United States, residing at WValnut Springs, in the county of Bosque and State of Texas, have invented certain new and useful Improvements in Tools for Lowering and Raising WVell-Tubes, of which the fol lowing is a specification.

My invention relates to new and useful improvements in tools for lowering well tubes into a well or withdrawing them therefrom. Its object is to provide a tool, which may be inserted into a section of well tubing, and caused to firmly grip the wall thereof by means of cord controlled mechanism.

Another object is to provide cord controlled means of releasing the tool from the section of tubing when the latter has been properly positioned in the well.

A further object is to provide the tool with downwardly extending guides adapted to project into the interior of the tube already in place so as to guide the section which is being lowered, into alinement with the section beneath it.

Finally the object of the invention is to provide a. device of the character described,

that will be strong, durable, simple and efficient, and comparatively easy to produce, and also one which will not be likely to get out of working order.

With these and various other objects in view, my invention has relation to certain novel features of construction and operation an example of which is described in the following specification, and illustrated in the accompanying drawing, wherein;

Figure 1 is a front view of the tool, a partial section of well tube being shown gripped by the tool, and also the upper portion of the lower section upon which the upper section is being lowered. Fig. 2 is a side view of the same, the well tubes being omitted. Fig. 3 is a detail vertical section taken on the line ww of Fig. 1 showing how the guides are pivoted to the tongs of the tool.

Referring now more particularly to the drawings wherein like numerals of reference designate similar parts in all the figures the numeral 1 denotes a pair of tongs pivoted one upon the other at a point 2 near their lower extremities, which extremities are curved outwardly below said pivotal point. To the upper extremities of the arms are pivoted two diagonally opposite corners of a four-bar linkage, the links of which are designated by numerals 8, 4, 5, and 6.

To the upper of the vertically alined cor- 11ers of the four-bar linkage a pivotal arm 7 is attached, and an arm 8 is pivoted at the lower of said corners. The arm 8 is provided with a longitudinal slot 9, within which the pivot of the upper .corner slides. Cords 10 and 11 are attached to the arms 7 and 8 respectively.

The lower extremities of the arms 1 are reduced in width, forming a central tongue 12 of circular shape. These tongues furnish a seat for the bifurcated pivot heads 13 which carry the guides 14:. When the pivot heads 13 are clamped against the interior of the tube it is apparent that the guides 14 are caused to project downwardly so as to enter the well tube upon which another tube is being lowered, as shown in Fig. 1 a plurality of holes 15 are provided in the fourbar linkage links to permit said links to be adjusted in length according to the diameter of tubing being handled.

It is obvious that when the cord 11 is kept in tension, causing an upward pull on the arm 8, the four-bar linkage will be elongated laterally causing the tongs 1 to open out and grip the pipe with the pivot heads 11. When the cord 11 is relaxed, and the cord 10 is placed under tension, exerting an upward pull on the arm 7, the four-bar linkage will be elongated vertically causing the tongs to close and the pivot-heads to release the tube.

What I claim is:

1. In a device of the character described, the combination with a pair of tongs pivoted one upon the other near their lower extremities, and having said extremities curved outwardly, of a four-bar linkage, diagonally opposite corners of which are attached to the upper extremities of the tongs, means attached to the lower corner of the four-bar linkage adapted to elongate the same laterally when placed under tension, and means attached to the upper corner of the four-bar linkage, adapted to elongate the same vertically when placed under tension.

2. In a device of the character described, the combination with a pair of tongs, pivoted one upon the other near their lower extremities said extremities being curved outwardly, of arms extending downwardly from said lower extremities adapted to guide the tube being lowered to its proper position upon the tube below it, a four-bar linkage two diagonally opposite corners of which are pivotally secured to the upper extremities of the tongs, means attached to the lower of the other two four-bar linkage corners, adapted to elongate the four-bar l-inkage laterally when placed under tension, and means attached to the upper four-bar linkage corner ada ted to elongate the four-bar linkage vertica ly when p aced under tension.

3. In a device of the character described, the combination with a pair of tongs, pivoted one upon the other near their lower eX- tremities, said extremities being curved outwardly below the pivotal point, of a head pivoted upon the lower extremity of each tong adapted to clamp against the interior of a well tube, an arm extending downwardly from each of said heads adapted to guide the well tube into proper position upon the one below, a four-bar linkage, pivoted to the Sir

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