US1535083A - Drilling jar - Google Patents

Description

vPatented Apr. 28, 1925.

UNITED STATES PAUL AnBoN, or '.rUIsA, OKLAHOMA.

DRILLING- JAR.

Application led January 2, 1923. Serial No. 610,263.

To all whom it may concern.'

Be it known that PAULARBON, a subject of the King of Great Britain, residing vat Tulsa, in the county of Tulsa and State of Oklahoma, has invented ,certain new. and

useful Improvements in Drilling Jars, of

which the following is a specification.

This invention contemplates the construction of a device of the class mentioned having the advantages of both a swivel socket and a jar.

In drilling oil wells through certain formations such as heavy 'gumbo and sticky clay the tools have a tendency to stick and .dive causing an irregular and erratic motion of the walking beam. The jar of the conventional socket type is insufficient to give an upward flow which will free the tools in such formations and such efforts as jarring action have resulted in constructions unsatisfactor from the standpoint of strength an durability. For instance in one known construction there is no shoulder er if a sufficient-shoulder is put in the lower member, it is necessary to weaken the main stem or the outside body. By going through the side of the body it is possible for me to keep my main stem of proper thickness and at the same time have plenty of strengthl through the outside body of the socket. Other well known jars are subj ect to the same complaints and while slight changes may be necessary to overcome same, nevertheless, such changes indicate the difference between success and failure in a .drilling operation which is an expensive undertaking. On the other hand, in the construction of a jar the necessity of providing a construction which will permit a rope action is essential. In other words, at the present time no one jar has all the essential features to answer the requirements of certain drilling operations.

L' of the assembled device,

have been made to procure the necessary The present device contains a construction 1n com-pllance to the essential requlre- Figure 2 is a vertical sectional view of Figure 1,

Figure 3 shows a modified form of the present invention showing the manner of inserting the lower` section',

Figure 4 is a vertical sectional view of Figure 3 with the lower section removed,

Figure 5 is a sectional view on line 5-5 of Figure 1 and Figure 6 is a sectional view on line 6-6 of Figure 2.

Referring more to the details of construction attention is directed to the fact that the upper portion of that type of the present invention shown'in Figures 1, 2, 5 and 6 is similar to the Burns device and in so far as the immediate construction is concerned form no part of the present invention. For the sake of clearly disclosing the present nvention, however, the construction will be seen to include the .body A formed with the lateral opening B through which the swivel head C is inserted, the latter carryin the cable D. The guard pin b extends paral el to the axis of the body and prevents the escape of the swivel. Lower transverse perforations a are arranged for the reception .of the conventional pin to lprevent the escape of the swivel through the longitudinal passage.

The body A is elongated for the ap lication of the present invention and the lbwer portion of this body has extending therethrough a continuation of the longitudinal passage formed in the upper portion for the reception of the swivel, this passage, however, is slightly enlarged from the lower walls of the transverse pin perforations, downwardly as indicated by reference character E. Two oppositely arranged lateral passages extend through the walls at F and F for a considerable portion of their length for the reception of the lateral extension on the lower section as will more clearly appear. y

The lower member G includes the body and the upper annular shank; This upper' shank includes the flattened head portion formed by the lateral extensions g and g" and the vertical extension g", the entire head being in the form of a cross. The arms or extensions g, g are constructed to t and travel within the passages F and F extending outwardly and terminating liush with the outer face of the body portion A.. The

upper extension corresponds in dimensions within the passage during the upper movement of the head, it being apparent that the lateral extensions g and g at the end of their upward stroke engage the walls f and f.

A T he upper annular shank -is of suiiicient' diameter to permit proper clearance during movement within the longitudinal passage as shown more clearly in Figure 6, this figure also showing more clearly the arrangement' of the head within the passage.

In Figures' 3 and 4 the inventionis sho-wn without the swivel socket as there are cases Figure-3 also ls owsclearly the method of constructing and assembling the two sections of the jar. In this ligure and -the same method applies to that form sho-wn in Figures l and 2, the lower end ofthe body is cut for a distance equal to the 'length of the enlarged longitudinal passage or for such a distance as may be necessary to procure the pro er expansion to permit the introduction ci) the head of the lower section. This cut indicated by reference character H is made by any suitable ymeans such as by a saw and the leg sections it and h 'are exanded until the head can be inserted. The egs k and lz. can then be brought together by a hammer or other suitable mechanism and electrically welded.

Particular attention is directed to the assembling of the elements and the relation of the parts whereby the strong, durable and compact construction is obtained.

What I claim as new and useful and desire to secure by Letters Patent, is.:

1. A jar comprising an uncut solid body portion free from joints and havingan extension provided at opposite sides with welded joints extending throughout the len th of the extension, said extension inclu 'ng two sections integral with the body portion and connected together by said welded joints, each of said sections being provided with an internal longitudinally extending groove and a slot extending through its wall from its outer surface to the groove, the slots having their outer'ends open at all times to permit dirt and the like to pass out of the Slo-ts, aA stem of slightly less diameter than the body arranged in said grooves and having a attened cross-shaped head, the arms of lwhich are slidably mounted in said slots, the upper ends of said grooves being spaced from the upper ends of the slots a distance equal to the length of the head above the arms to permit the arms to strike the upper ends of the slots simultaneously with the impact of the head against the upper ends of the grooves.

2. A jar as claimed in claim 1in which `the stem is provided with an annular shoulder arranged below the extension of the body portion and adapted to engage the lower end of said extension during the oper- \ation of the jar.

3. A jar as claimed in claim 1in which the body portion is provided with a bore extending from its upper end to said grooves, a cable extending through the upper end of the body portion into said bore and. having its lower end swiveled and axially movable within the bore, and means in the body portion above the grooves to permit a cross-pin to be passed across the bore for preventing the swivel from falling downwardly into said grooves. l

4. A jar comprising a tubular body portion free of joints and having an extension at its lower end provided at opposite sides with welded joints extending throughout the length of the extension, said extension including two sections integral with the body portion Aand connected together by Welded joints, each of said sections being provided with an internalv longitudinally extending groove and a slot extending through its wall from its outer surface to the groove, the grooves forming a passageway coaxial with the bore ofthe body portion, a cable .rotatable and axially movable in the upper end of the bore ofthe body portion and provided atits lower end with a swivel, said body portion having ports extending through the same to receive a pin for limiting the downward movement of the swivel, said ports being arranged above the grooves, and a stem of slightly-less diameter than the body portion arranged in said grooves and having a flattened cross-shaped head, the arms of PAUL ARBON.

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