CN2214661Y - On-line oil casing J-value measuring rule - Google Patents

Abstract

The utility model relates to a vernier caliper. A coupling length acceptance limit line 2 is carved on a scale 1 of the caliper. A position of the scale 1 which is corresponding to the other side for measuring an outer diameter is provided with one measurement contact 3 whose width is a standard J value. On a measurement rule, double scales 6 are carved. Standard J value tolerance range lines 8 are carved on the both sides of a 0 position of a vernier 7. Coupling length is firstly measured, if the 0 position of the vernier 7 is in the range line 2, an indication needs to be memorized, and then the size of the contact 3 is used for measuring a distance from a pipe end to a coupling end. If a coupling length value line is in the range lines 8, a J value is accounted to be qualified. The utility model can accuracy judge whether the J value is qualified without calculation, and the utility model is simple, convenient and quick, being suitable for on-line measurement.

Description

On-line oil casing J-value measuring rule

The utility model is a kind of vernier caliper of measuring article length, measures check fast at online tubing and casing especially.

During tubing and casing is produced, after the box cupling machine is tightened on the body, the body end face is that the J value is that the important parameter that connects quality is twisted in a reflection to the distance at box cupling center, stipulated J value tolerance in API5CT standard and the 5B standard, especially in commodity inspection, whether the J value is qualified is to judge one of important parameter that tubing and casing is whether qualified, the defective larger specific gravity that occupies of J value in the tubing and casing quality objection.The main means that present domestic check hilllock tubing and casing J value is measured are at first to adopt metallic tape or the depth vernier gage measuring tube end face length to box cupling one end, and then use the vernier caliper measurement coupling length, can know just as calculated whether the J value is qualified, this method measuring speed is slow, all to calculate after each the measurement, concerning the field test worker, can not accomplish, and the metallic tape out of true.As calculated coupling length is divided into the plurality of segments scope though the technician gives first several tubing and casing specifications to normal production, the contrast measured value determines whether the J value is qualified, makes correct judgement in the time of can't being in critical conditions to the J value.Adopting special-purpose J value chi to measure can be judged accurately, but the J value chi that uses is manipulated all more complicated at present, the J value chi of the old-fashioned slipstick of a kind of picture that produces as West Germany, need to measure coupling length and coupling face distance, calculating J value on chi again to pipe end by vernier caliper and pit gauge; And homemade J value chi is measured respectively by tow sides coupling length and J value, and the measuring process complexity divides the action of five steps just can finish.These J value chis all are the actual numerical values of measurement J value, though accurately, speed is slow, are applicable to that the J value of off-line is accurately measured, or are used for commodity inspection and short run test usefulness, and are unsuitable for using at X-ray inspection X of streamline production equally.

The purpose of this utility model is intended to make improvements according to problems of the prior art, to obtain a kind of J value chi that can judge quick and precisely that the J value is whether qualified, be applicable to online checking measurements, outstanding simple and easy, accurate, directly perceived, quick, can catch up with the production of streamline fast pace.

For achieving the above object, the utility model is reformed traditional vernier caliper and is innovated; Make it to become a kind of J value chi of special use.

Accompanying drawing is depicted as the utility model structural representation.

Shown in Figure of description, the utility model is a kind of vernier caliper that has improved, acceptability limit according to the tubing and casing coupling length of required each specification of measurement, on the scale 1 of slide calliper rule, carve each specification coupling length acceptability limit line 2 and corresponding specification mark, the opposite side that corresponding measurement external diameter is a coupling length on scale 1 is provided with the measuring contacts 3 that a width equates with standard J value, its outer contacting measurement face be pipe end surface of contact 4 with the interior contact measurement face of the elbow card 5 of scale 1 head of measuring coupling length at grade, be carved with twice scale 6 on this side scale 1, be carved with two standard sets J value margin tolerance line 8 and respective markers in the both sides, " 0 " position of vernier 7.

During measurement, at first record coupling length by general vernier caliper method, if " 0 " on the vernier 7 position is in the acceptability limit line 2 of institute's gauge lattice, illustrate that then this coupling length is qualified, at this moment just need survey crew to remember the coupling length measured value, if " 0 " on the vernier 7 value is outside the acceptability limit line 2 of institute's gauge lattice, illustrate that then this coupling length is underproofly just needn't remove to read measured value again, with general vernier caliper measurement coupling face to the pipe end face apart from the time, actual recording equals 1/2 coupling length and adds the J value, if it is that J value tolerance is when being zero that actual measurement J value equals standard J value, J value chi is put in the box cupling, the pipe end surface of contact 4 of measuring contacts 3 contacts with pipe end, movable vernier is close to coupling face, the numerical value of surveying should just in time equal to survey 1/2 of coupling length, double measuring this scale value on one side of J value, then survey measurements just in time is a coupling length, people just needn't do one again and remove 2 computing like this, be not equal to standard J value if measure the J value, the numerical value groove of the coupling length of surveying will be departed from position, " 0 " on the vernier 7 so, if in the standard of tolerance scope line of the both sides, " 0 " position of the numerical value groove of the coupling length of surveying on vernier 7, the J value that product then is described is qualified, otherwise then defective, and needn't calculate by reading.

Use step of the present utility model is: measure coupling length, if qualifiedly remember numerical value, the measuring tube end face is to the coupling face distance again, needn't reading calculating, and whether intuitive judgment J value is qualified.The utility model whether in acceptability limit, judges whether product J value qualified so can measure rapidly owing to only consider J value, is particularly suitable for on-line measurement and checks, can accomplish that per minute is more than 2, easy, directly perceived, and can reduce the people for miscount, judging nicety rate is higher.

Claims (1)

1, a kind of online tubing and casing J value dip stick, be a kind of vernier caliper, it is characterized in that: according to the acceptability limit of the tubing and casing coupling length of required each specification of measurement, on the scale (1) of slide calliper rule, carve each specification coupling length acceptability limit line (2) and corresponding specification mark, the opposite side that is coupling length at the upward corresponding measurement external diameter of scale (1) is provided with the measuring contacts (3) that a width equates with standard J value, its outer contacting measurement face be pipe end surface of contact (4) with the interior contact measurement face of the elbow card (5) of scale (1) head of measuring coupling length at grade, be carved with twice scale (6) on this side scale (1), be carved with two standard sets J value margin tolerance line (8) and respective markers in two of " 0 " positions of vernier (7).

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