US67059A - Henry kewley - Google Patents

Description

fat-ten gieten 'tttrnt @frn IMPROVBD TUBING-CLAMP.

"cite Stimuli nient tu in ilgrss-grtin's Qz-ltntt :uit making tutt at tigt snm.

TO ALL WHOM I'l MAY CONCERN:

Be itknown that I, HENRY KEWLEY, of Perry, in the county of Lahe, and State of Ohio, have invented certain new and useful Improvements` in Tubing-Clamps; and I do hereby declare that the following is a full and complete description of the saine, reference bcingbad to'the accompanying drawings, making a part of this specification, in which- Figurel is'a side`view ofthe cianips.

Fig'ure 2 is :Lvertical longitudinal section.

Figure 3 is 'a top view.

Figure 4 is an under side view of the saine.

`Like letters refer to like parts in the dicrent views.

This clamp is made of iron, and is constructed in two sections, A and B, tig. 3, which are connected to each other by the hinge-joint C, by the means of which the two sections may be opened for a purpose, as will be hereafter shown. D is a pawl, pivoted between the two sections at the point a', and is of the shape shown in iig. 2. The face of this pawl is groored so as toconform to the circumference ofthe eye or hole D', into which it is seen to project, as shown in fig. 3, this being the upper part of the pawl, and the project-ion in fig. 4 the lower end. E is a lever inserted in the pawl, by the means of which it is operated. F is a spring, for the purpose ofthrowing the pawl forward into the eye. G is a bolt, by means of which the two sections are secured together. H is a brace, for the purpose'of keeping the two sections apart, so as to permit a free play of the pawl. J is a. boss o'r collar upon the under side ofthe clamp, the inner diameter of which is made largcrithan the diameter of the hole, forming thereby a reccssor.enlargement, J', at the lower end. I

A lhis implement is for tbc purpose of raising and llowering tubing into the oil-wells or other wells in which tubing is used, and is operated as follows: The clamp is placed upon the top ofthe curbing within the chamber, so that `the implement may rest upon the shoulder' K, and thercbybe supported, or prevented from sliding down upon the curbing. 'lhe pipe or tube is introduced into the curbing through the eye or hole of the clamp, and as it descends into the well, the measure of its descent is controlled by the lower end of the pawlwhich is forced against the tube by pulling'back thc-lever E in the direction indicated by the dotted-lines E', fig. 2, and the speed of the descending tube is thereby controlled. When it is necessary to retain the tube at any point in its descent, or to withdraw it from the well, the upper part ofthe pawl is thrown forwardinto the position shown in the drawing. By this it is obvious that its further descent is impossible so long as the pawl remains in. this position, as the greater the weight downward, the stronger willvbe the pressure of the pawl exerted against the tube; and so, on the withdrawing ofthe tube from the well, the clamp is lifted up, and, as a consequence, the pipe is drawn up with it, for the descent of the tube and the lifting up of the -`'clamp alike cause the pawl to draw tight against the pipe, inorder to allow the enlargement or collar, by which the several sections of the pipe are connected, to pass through the eye.I The clamp is opened by loosening the bolt, by the means of which the two sections are secured, and the clamp thereby opened suicient-ly to admit of the passage of the joint, and, when passed, again closed together as before. y

By the use of this clamp, tubing can be let down the well with ease and safety, and without slipping, as is the case in the old method. The more especial advantage derived from `this clamp is in withdrawing the tubing from the well. In the old way of doing thiswith tongs, it is always attended with much labor, inconvenience, and trouble; in consequence of the slipping of the tongs, the tubing being oily, hence eutremely slippery, it is very ditlcult to make the tongs'hold sufficiently tight to withdraw the pipe. By the use of the clamp, this diiculty is avoided, for, as above remarked, the greater the weight to be lifted the stronger lwill be the action of the pawl against the tube, and the edge ofthe pawl being sharp, it cuts into the side of the tube, and thereby making it impossible for the tube to slip.

What I claim as my improvement, and desire to secure by Letters Patent, is

The collar J, jointed sections A B, paw] D, lever E, und spring F, arranged in relation to each other in the manner and for the purpose set forth.

HENRY KEWLEY.

Witnesses:

G. W. CnownLL, O. B. Pennen.

Images