US1507991A - Tool joint - Google Patents

Description

Sept. 9, 1924.

C. R. EDWARDS TOOL JOINT Filed on. 14; 19 19 ?etent et. 9, i224 e i. rsr ori ore srnrss a n. or nonsrorv, it

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Application filled @ctober 1d, 1919. Serial No. 380,555.

To all whom it may concern:

Be it known that I, CHAnLns REDwAnos, citizen of the United States, residin at Houston, in the county of Harris and tat/e 7 necting together the adjacent ends of the sections of a drill stern. In drilling wells by the well known rotary process, a drill stem is employed formed of sections and to the lower end of which the drill bit is attached. In drilling the bit becomes worn and the stem must be withdrawn from the bore, for the purpose of substituting a new hit andlin withdrawing the stem, the stem must be broken up, usually at every third joint, so that it can be easily handled and when the new hit is substituted for the old one, the stem must be again made up and let down into the bore. in described has been desied so that the stem may be easily broken up as it is being withdrawn .trom' the bore and easily made up 1 when it is being let down into the bore. T e joint may also be used to connect the grief stem or the drill bit to the drill stem.

Another object of the invention is to provide a tool joint of the character described so constructed that the stem may be readily held suspended in the bore by elevators while it is bein made up, or broken up.

With the above and other obgects in view, the invention has particular re ation to certain novel features of construction, arrangement or parts, and use an example of which is given in this specification and illustrated in the accompanying drawing wherein: Figure 1 shows a vertical sectional view of the device and Figure 2 shows a sectional view taken on the line 2-2 of Figure 1.

Referring now, more particularly to the drawing, the numerals 1 and 2, respectively, refer to the adjacent sections of the drill stem, the lower end of the section 1 bein shown reduced and somewhat thickened an the upper end of section 2 being shown up-- set, or formed with thickened walls and externally threaded. As shown in Fl ure 1, the adjacent ends of said sections are orined with projecting interlocking shoulders 3 and The tool joint here-' 4, said resective shoulders bein spaced apart, and t e shoulders 3 arrange in stagred relation to the shoulders 4t and fitting utween them so as to form, in efi'ect, a clutch. These intermeshing shoulders may be of various forms, the preferredforin being shown. lower end of the section 1 is a ring like nut 5, which is provided to hold the connecting coupling 6 against detachment from sai section. This coupling is sleeve like in form and its upper end has the inwardly extending annular flange 7 which fits closely,

wherein the reduced lower end of the section 1. This coupling is first fitted over said reduced end and the nut 5, then screwed in lace. The lower end of the'coupling 6 is internally l threaded and when it is desired to couple together the two sections of the string, said coupling 6 is first secured Screwed upon the reduced upon the section 1 as explained and is then threaded on to the upper end of the section 2 and screwed up tight so as to form a tight. fitting joint. The coupling 6 sustains the weight of the stem, but as the stem is rotated in the well known manner, in the process of drilling, the interloclrin shoulders 3 and 4 will sustain the torsiona strain Underneath the coupling 6 there is an annular shoulder 8, carried by the section 2, and while the stem is bein. made up or broken up as above explains this shoulder rests u on the upper end of the elevators 9 of wel known construction, which in turn are sustained by the rotary table of the well known rotary, one of the chief lectures of this form of tool joint residing in the provision of said shoulder to engage with and rest upon the elevators and to sustain the weight of the stern down the here.

at l claim is: s A tool joint, including two ipe sections whose ends abut, one of said u utting ends being reduced and thickened andthe other abutting end being nest and formed with thickened walls wich are externally threaded, interlocking shoulders carried by said abutting ends, said shoulders being spaced apart and arranged. in stagger relation, the shoulders of one end fitting b tween the shoulders or the other end, a ringlike not threaded onto said reduced end, a coupling titted around said reduced end, said coupling heing sleeve-like in form and having one end formed into an inwardlyextending unnnlar flange which engages littl- Q images-v1 against said null and having its other emi name to this specificatiun in the presexdce 01E lnternally inhreadedi and thus adeped L0 be We subscnblng wmlesses.

screwed onto the outwardly threaded upset end of the other section and a set screw by CHARLES EDWVARDS means of which said ringlike nut is locked Witnesses:

against unscrewing. E. V. PARDWAY3 in testimony whereef I have slgmed my ALBERTA ALLEN,

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