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departure/ dogleg/ rathole

Spanish translation: desviación de hoyos de perforación/ pata de perro/ ratonera

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:departure/ dogleg/ rathole
Spanish translation:desviación de hoyos de perforación/ pata de perro/ ratonera
Entered by: Manuel Cedeño Berrueta
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05:12 Apr 7, 2004
English to Spanish translations [PRO]
Tech/Engineering - Petroleum Eng/Sci
English term or phrase: departure/ dogleg/ rathole
Buenas noches/días, colegas.

departure/ dogleg/ rathole

Me disculpo por poner más de un término a la vez
No tengo mucho contexto; es un folleto sobre herramientas de perforación, con frases muy cortas:

Wellbore departure systems = sistemas de desviación de pozos/ perforaciones?

A high quality wellbore departure that delivers:

Optimum dogleg > ¿¿¿pata de perro????

Required rathole > ¿¿¿cueva de rata????

Las definiciones en inglés que tengo:


departure curve
1. n. [Formation Evaluation] ID: 3077

A graph that shows the effects of environmental factors on the ideal response of a measurement. The name comes from the departure of the actual response from the ideal. The term is used most commonly in relation to the effect of hole size, mud resistivity, bed thickness, invasion and other factors on electrical logs.

Synonyms: correction chart

See: environmental corrections


Dogleg
1. n. [Drilling] ID: 1349

A particularly crooked place in a wellbore where the trajectory of the wellbore in three-dimensional space changes rapidly. While a dogleg is sometimes created intentionally by directional drillers, the term more commonly refers to a section of the hole that changes direction faster than anticipated or desired, usually with harmful side effects. In surveying wellbore trajectories, a standard calculation of dogleg severity is made, usually expressed in two-dimensional degrees per 100 feet [degrees per 30 m] of wellbore length.
There are several difficulties associated with doglegs. First, the wellbore is not located in the planned path. Second is the possibility that a planned casing string may no longer easily fit through the curved section. Third, repeated abrasion by the drillstring in a particular location of the dogleg results in a worn spot called a keyseat, in which the bottomhole assembly components may become stuck as they are pulled through the section. Fourth, casing successfully cemented through the dogleg may wear unusually quickly due to higher contact forces between the drillstring and the inner diameter (ID) of the casing through the dogleg. Fifth, a relatively stiff bottomhole assembly may not easily fit through the dogleg section drilled with a relatively limber BHA. Sixth, excessive doglegs increase the overall friction to the drillstring, increasing the likelihood of getting stuck or not reaching the planned total depth. Usually these problems are manageable. If the dogleg impairs the well, remedial action can be taken, such as reaming or underreaming through the dogleg, or even sidetracking in extreme situations.

See: bottomhole assembly, casing string, directional drilling, inside diameter, keyseat


Rathole
1. n. [Drilling] ID: 1537

A storage place for the kelly, consisting of an opening in the rig floor fitted with a piece of casing with an internal diameter larger than the outside diameter of the kelly, but less than that of the upper kelly valve so that the kelly may be lowered into the rathole until the upper kelly valve rests on the top of the piece of casing.

See: kelly, mousehole

2. n. [Drilling] ID: 1538

Extra hole drilled at the end of the well (beyond the last zone of interest) to ensure that the zone of interest can be fully evaluated. The logging tool string may be as much as 120 ft [36.5 m] in length, so the rathole allows tools at the top of the logging string to reach and measure the deepest zone of interest. In addition, there is usually a small amount of extra hole drilled to allow for junk, hole fill-in and other conditions that may reduce the effective depth of the well prior to running logging tools.

See: junk

3. n. [Drilling] ID: 1539

Extra hole drilled at the bottom of the hole to leave expendable completion equipment, such as the carriers for perforating gun charges.

See: completion

http://www.glossary.oilfield.slb.com/Display.cfm?Term=apertu...


MUCHAS GRACIAS

Manuel
Manuel Cedeño Berrueta
Local time: 11:13
gráfica de corrección & recodo
Explanation:
Diccionario enciclopedico de terminos tecnicos

Los otros no se encuentran en el diccionario.

Ellen
Selected response from:

Ellen Singer
Local time: 17:13
Grading comment
wellbore departure systems = sistemas para desviación de hoyos de perforación

dogleg = (desviación tipo) pata de perro

rathole = ratonera

(términos usados Venezuela)


Muchas gracias, y saludos cordiales desde Caracas,
Manuel

4 KudoZ points were awarded for this answer

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Summary of answers provided
5gráfica de corrección & recodo
Ellen Singer


Discussion entries: 2





  

Answers


1 hr   confidence: Answerer confidence 5/5
correction chart & dogleg
gráfica de corrección & recodo


Explanation:
Diccionario enciclopedico de terminos tecnicos

Los otros no se encuentran en el diccionario.

Ellen

Ellen Singer
Local time: 17:13
Works in field
Native speaker of: Native in EnglishEnglish, Native in SpanishSpanish
PRO pts in category: 4
Grading comment
wellbore departure systems = sistemas para desviación de hoyos de perforación

dogleg = (desviación tipo) pata de perro

rathole = ratonera

(términos usados Venezuela)


Muchas gracias, y saludos cordiales desde Caracas,
Manuel
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