JPH0454036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Background of the Invention) This invention relates to wireline borehole operations, particularly borehole operations using stayers for extending, moving, and positioning wireline tools in highly deflected oil wells. Concerning excavation and drilling operations.

In the ever-continuing oil and gas exploration and development of producing oil and gas fields, more and more oil wells are still being drilled, and the proportion of boreholes that deviate substantially from traditional vertical configurations is increasing. is increasing. For example, in offshore production, typically one
It is more economical to use one drilling and production platform for many wells. Accordingly, many of the boreholes drilled from such shared or common platforms must travel a considerable distance horizontally before reaching the area of reserves to be mined or produced. Other conditions that require highly deviated boreholes include gas production at shallow depths, exploration and production below shipping channels, operational limitations or restrictions imposed by government agencies on surface production facilities in certain areas. There are special circumstances, etc. These boreholes tend to have increasingly long and highly deflected ramps, often extending over 70 degrees of deflection and lengths of over 16,000 feet (4,800 m).

To determine various physical parameters of the formation in the vicinity of the borehole and to drill the production borehole, conventional oil well drilling tools and drilling equipment are typically connected to oil well drilling cables (“wireline”).
suspended in a borehole and lowered into the target area. However, in highly deflected boreholes such as those described above, gravity cannot be relied upon to lower the well drilling tool and pull the wireline cable behind the tool.

When pipes and piping can be used inside an oil well, there is a technique for moving underground oil well equipment by pumping the equipment through the pipe by using fluid flow inside the pipe. For example, U.S. Pat.
A locomotive system is disclosed. In this, stationary tubing pushes the well equipment in front of a locomotive. Although this device is useful for free-standing well equipment, the "capstan" effect in the curved tubing at the well entrance requires tremendous force to pull the cable through the curved entrance, making it difficult to use with wireline tools. is usually not valid.

No. 4,337,969 (issued July 6, 1982), both assigned to the assignee of the present invention.
and U.S. Patent No. 4,349,072 (issued September 14, 1982)
As described in more detail in ,
It has been proposed to move a conventional wireline tool through a deflected borehole. As described in more detail in both of the above patents, the stayer pushes and pulls the well drilling tool within the borehole region as required.

This technology faces many different challenges. One of these principles is that the drilling tool in the borehole, the surface equipment at the top of the borehole,
It is the point of electrical connection between the intermediate cable and the intermediate cable. Because the drill pipe is added to the drill train one section at a time at ground level, it is impractical to run the cable through the drill pipe. In some prior solutions, wire lines were attached to the outside of the drill pipe during assembly of the drill train. However, when the cable is attached to the outside of the drill pipe, as the cable moves through the borehole,
There is a great risk of damage and abrasion.

In another solution, described in the above-mentioned US Pat. No. 4,337,969, the cable was attached to the outside of the stinger, but the cable was passed inside the drill pipe above the stinger. Although this method protects the cable, it does not completely encapsulate the cable all the way to the tool.

No. 4,349,072 discloses another method and apparatus that is highly effective for pulling wireline cable through a drill pipe after assembly of the drill pipe. In this method, a regular sized wireline tool (usually too large to pass through the drill bank) is removably attached to the bottom end of the drill bank. An automatic propulsion machine propelled by mud pressure within the drill train pulls both the wireline and the stayer through the drill train. A steiner is then coupled to the upper end of the wireline tool, making mechanical and electrical connections and propelling the tool from the drill train into the borehole at one end of the steiner.
This invention also eliminates the need to install wireline throughout the length of the drill train during assembly. However, this still requires that the length of the cable, which is installed inside the stayer to protect the cable in this case, be fitted end-to-end with the stayer during assembly at the well site. This point unfortunately makes the use of long stayers inconvenient, and therefore long individual operations with long stayers cannot be carried out, and a series of short excavation operations are required for short stayer length intervals. . One of the major factors limiting the actual length of the stayer is the risk of the stayger buckling while being pushed out of the drill stem by the automatic propulsion machine. If the steiner is long,
The required pressing force is correspondingly greater and the risk of buckling is therefore also greater.

This allows drill stems and stayers of virtually any desired length to be "pre-wired" (pre-wired).
It can be assembled and used without the need for wired or wireline cables, and the wireline cable can be attached to the drilling tool through the drill stem and stainer to prevent the cable from being damaged in the borehole. and that can efficiently pull the stayer out of the drill pipe and virtually protect it from buckling, regardless of the length of the stayer.
What is needed is an apparatus and method for drilling or perforating operations in highly deflected wellbore.

In summary, the present invention provides a dual- or A two-stage motion member satisfies the above needs and objectives. Furthermore, when performing a drilling operation, the two-stage motion device essentially pulls (rather than pushes) the stinger from the bottom end of the stinger into the borehole, thereby virtually eliminating the risk of buckling. Therefore,
The entire stayer and drill stem can be assembled to virtually any length without the need for pre-threading.
The high expense and/or inconvenience and delays associated with conventional methods and devices can be avoided. Furthermore, the special shape of the present invention effectively prevents buckling of the stinger even if the cable pulls the bottom end of the stinger away from the tool when the stinger is retracted into the drill pipe.

It is therefore an object of the invention to use a pipe, such as a drill pipe, for drilling and/or perforating geological formations surrounding a borehole; can be used with pipes without needing to be connected; tubing and pipe can be assembled in a disconnected manner; wireline can be successfully transferred through the pipe and steiner tube, and electrically and mechanically connected to the wireline tool at the bottom of the steiner and to provide new and improved devices and methods that enable the use of compound motion devices to perform these functions;
It is inexpensive and has a wide range of uses, especially suitable for drilling and drilling highly deviated boreholes.
The objective is to achieve the above objectives with a highly reliable and highly efficient method and apparatus.

Other objects and advantages of the invention will become apparent from the following description, accompanying drawings, and claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the drawings, a new and improved apparatus and method for drilling or perforating geological formations surrounding boreholes, particularly highly deviated boreholes, will now be described. Figure 1 shows stratum 15.
A borehole 10 is shown having a deflection section 12 extending across. A conventional wireline tool 20 is shown attached to the lower end 22 of the hollow extension member or stayer 25, opposite the upper end 27, for performing the desired excavation or drilling operation in the target section of the deflection section 12. The tool 20 is actually attached to and supported by the lower end 22 of the stainer 25 by a coupling head 30, as will be explained below. On the other hand, the coupling head 30 is removably engaged with the lower end 32 of the drill pipe 35, and the stainer 25 is extendably received within the drill pipe 35, thereby allowing the drill pipe 35 to extend through the target deflected borehole 1.
Transported to 2.

As will be apparent to those skilled in the art, wireline tool 2
0 consists of conventional oil well drilling tools used to drill the strata surrounding the borehole 10, or conventional oil well drilling machines used in finishing operations such as drilling coated boreholes. Accordingly, as used herein, the term "wireline tool" refers to any borehole that is connected to surface equipment, such as conventional surface equipment 38, via an oil well drilling connection cable 40, commonly known as a "wireline." Shows tools for use.

Drill pipe 35 and steiner 25 are assembled by any conventional means commonly used in deflected borehole operations with taingers carried within the drill pipe. It is important to the present invention that the drill pipe and stayer do not include any length of wireline cable during their assembly, during their transfer to the deflection borehole 12, and after assembly and transfer. This means that there is no need to install a cable within the stayer as disclosed in the above-cited U.S. Pat. There is no need to prepare a stainger that is lowered from the surface along with the.
Furthermore, during drilling and perforation operations, the cables are not carried outside the drill pipe or stainer where they may be exposed to wear and tear from contact with the borehole wall.

Instead, in the present invention, a dual motion body having a first motion section 44 and a second motion section 45 directs the wireline cable 40 to the wireline tool 20 and extends the stayer 25 from the drill pipe 35. That's what I do.

More specifically, since the hollow Steinger tube 25 has an outer diameter smaller than the inner diameter of the drill pipe 35 to which the present invention is applied, the Steinger tube 25 can freely move up and down within the drill pipe 35. A first coupling means 50 provided at the upper end 27 of the stayer 25 is arranged to receive the first moving part 44 . It is also possible to lock the first moving part 44 and the first coupling means 50 together, but as will become clear from the following description of the invention, this locking is not necessary and the first The moving part need only be seated on the coupling means 50.

A second coupling means 55 is attached to the lower end 22 of the stayer 25. A second coupling means 55 of known suitable shape is adapted to receive and couple to the second moving part 45 after the second moving part 45 has passed through the interior of the hollow Steiner tube 25. There is. The second coupling means 55 also forms at least one electrical connection with the second moving part 45 and completes the electrical circuit from the wireline cable 40 to the wireline tool 20. The attachment of the wireline tool 20 to the second coupling means 55 at the lower end 22 of the stayer 25 can be done, for example, by
This is done by means of a lower coupling head 30 to which the tool 20 is fixed. Coupling head 30 and second moving part 4
5 each have complementary wet-engage connector portions 59a, 59b of designs known in the oil well drilling art for completing one or more electrical connections.

Electrically or mechanically actuated removable locking means 60 known in the art cooperate to lock coupling means 55 into an adjacent drill when coupling means 55 is not coupled to second moving part 45. It locks onto the pipe 35, and the wire line tool 20 and the stayer 25
and are supported within the lower end 32 of the drill pipe 35.
The locking means 60 also release the second coupling means 55 from the drill pipe 35 when the second coupling means 55 is coupled to the second moving part 45 .

The first moving portion 44 has a seal 64 having an effective outer diameter substantially equal to the inner diameter of the drill pipe 35 in which the seal 64 is to be used. Also, as shown, the first moving portion 44
is adapted to engage the first coupling means 50 and is adapted to engage the first coupling means 50, as will be explained further below.
The pressure of the fluid flow within 5 moves it to the coupling means 50 . Similarly, the second moving portion 45 has a seal portion 65 having an effective outer diameter substantially equal to the inner diameter of the Steiner tube 25 . Second motion part 4
5 is similarly propelled within the Steiner tube 25 by the pressure of the fluid flow through the Steiner tube 25. Furthermore, the first moving portion 44 has a hollow recess 67 having a diameter substantially equal to the inner diameter of the Steiner tube 25, and the second moving portion 45 is disposed within the recess 67.
and the upper end 2 of the stayer 25
Until reaching the first coupling means 50 of 7, the recess 6
7 and thus the second moving part 45 arranged in the drill pipe 35 . Thus, as can be seen from the drawings, the second moving section 45 pulls the wireline cable 40 through the drill pipe 35, the first moving section 44, and the Steiner tube 25, and the first moving section 44 After being coupled to the coupling means 50 of the first moving part 44, it is adapted to be lowered independently of the first moving part 44.

The first moving part 44 has a fluid passageway 70 that includes a hollow recess 67 such that the second moving part 45 moves together with the first moving part 44 .
, the fluid passageway 70 is closed. On the other hand, when the hollow recess 67 is open, the fluid passageway 70 completely fluidly connects both sides of the seal portion 64 via the first moving portion 44 and directs the fluid through the passageway 70. Exercise part 4
Equilibrate the fluid pressure on both sides of 4. As shown in Figure 4, this situation occurs in particular when the first moving part 44 is received in the first coupling means 50 of the upper end 27 of the stayer 25. By equalizing both body pressures on both sides of the first moving part 44, the first moving part 44 is then propelled out of the end of the drill pipe 35 so that the first moving part 44 is propelled out of the end of the drill pipe 35.
Substantially no pressing force or thrust is applied to the upper end 27 of the stayer 25. (In fact, the only applied pressing force is due to mud pressure acting on the effective cross-sectional area of the upper end 27 of the Steiner tube 25.) Below the first coupling means 50, preferably adjacent the lower end 32 of the drill pipe 35. The Steinger seal 73 movably seals the outer circumference of the Steinger tube 25 with respect to the inner circumference of the drill pipe 35 to prevent fluid fed into the drill pipe 35 from leaking from the outer circumference of the Steinger tube 25. do.
The fluid being fed into the drill pipe first moves both moving parts into the drill pipe from the upper end of the drill pipe 35 at the surface until the first moving part 44 reaches the first coupling means 50 and seats there. propel downward. The fluid pressure then continues to propel the second moving part 45 further down through the Steinger tube until it finally reaches the second coupling means 55.

Upon reaching the second coupling means 55, the second moving part 45 actuates the locking means 60 to release the Steiner tube 25 from the drill pipe 35, and at the same time the second moving part 45 acts on the locking means 60. Connect to 60. The fluid flow through the drill pipe 35 then urges or propels the second moving portion 45 further down and out of the drill pipe 35, causing the stayer 25
a second moving part 45 positioned at the lower end 22 of the
The entire stayer is pulled out from the bottom of the drill pipe 35. That is, substantially all of the force for moving the steiner 25 and wireline tool 20 from the drill pipe 35 to the drilling position is applied by the second moving portion 45 at the lower end of the steiner; It is a tensile force over the entire length. The only force trying to push the steiner is the first
Since the pressures on both sides of the moving part 44 are balanced, there is a small force corresponding to the pressure acting on the effective cross-sectional area of the upper end 27 of the Steinger tube 25.

After the wireline tool 20 and stayer 25 are extended as desired, a conventional drilling or drilling operation is performed. In an excavation operation, the wireline cable 40 is retrieved and moves the tool 20 into position at the desired speed to perform the excavation operation. This simultaneously causes the stayer 25 to be retrieved or retracted into the drill pipe 35. The collection power is
This is provided by pulling and retracting the wireline cable 40. As is readily apparent, the stayer 25 is then pushed back into the drill pipe 35 by the second moving part 45 of the lower end 22 of the stayer 25. However, the stayer 25 is again protected from buckling by the invention. That is, the buckling tendency of the stayer 25 results in a lateral force on the wireline cable 40. Such forces are applied to the cable 40
By simply increasing the tension of the Steiner 2
5 will not buckle. Since the deviation from "straight line" at this point is only very small, only a very small lateral force is required to resist the large longitudinal forces on the steiner and keep it from buckling. is required.

This point is an important feature of the present invention, and although it may not be easy to understand, a string is passed through a small diameter rubber tube, the string is fixed to one end of the rubber tube, and the string is passed through the rubber tube from the other end. This can be easily demonstrated by pulling . It will be seen that no matter how large a tensile force is applied to the string, the tube will not buckle because the tension on the string far exceeds the net lateral buckling force applied to the tube. In other words, the present invention allows the use of steiners 25 of virtually unlimited length;
The stayer can be extended and retracted without fear of buckling.

After finishing the operation, the second moving part is removed from the Steinger tube 25. By further retracting the wire cable 40, the second moving part 45 moves to the first
is pulled into the hollow recess 67 of the moving part 44 of the second moving part 45 as the second moving part 45 is pulled upwardly by the wireline cable 40 attached to the second moving part 45. The first moving part 44 is then pushed upwards. The two moving parts and the wireline cable are now completely retracted and removed from the Steiner tube and drill pipe, and the tool 20 can be subsequently repositioned by changing the length of the drill pipe 35 and the Steinger tube can be removed. Maximum simplicity and convenience is provided for adjusting the length of 25 or removing either or both from borehole 10 without having to insert wireline cables therein, if desired.

As can be seen from the above description, the present invention has many advantages. First, it allows easy and rapid assembly of virtually unlimited lengths of drilling or perforating Steiner tubes and drill pipes for use in drilling highly deviated oil wells. In addition, the unique construction of the dual-motion device allows the Steinger to be extended from the drill pipe by being pulled rather than pushed, and the retraction is performed by a tension cable within the Steinger tube, making it possible to The risk of buckling is virtually avoided regardless of the length of the tube. Therefore, with the present invention, virtually any length of stayer can be easily used, and the wireline cable can be quickly, easily, minimally costed, and in a manner that protects the cable from damage in the borehole. connected to the wireline tool.

Although the embodiments of the method and apparatus described above constitute preferred embodiments of the present invention, the present invention is not limited to these exemplified embodiments of the method and apparatus, and various modifications may be made without departing from the scope of the invention. It should be understood that it is possible to apply

[Brief explanation of the drawing]

FIG. 1 shows a deflection borehole extending across the formation to be drilled, with the drill train, stayer and drilling tool shown already assembled and placed in the borehole, and inside the drill train. A schematic diagram showing the compound moving body about to enter the stainger; Figure 2 is a diagram showing the compound moving body connected to the upper end of the steiner; Figure 3 is a diagram showing the compound moving body connected to the steiner in the position shown in figure 2. FIG. 4 is a view similar to FIG. 3, showing the inner moving part that separates from the outer moving part and enters the Steiner; FIG. , a diagram showing the inner moving part that connects to the lower end of the steiner and begins to pull the steiner out of the tube;
Figure 6 is a partially detailed sectional view showing the inner moving part in the position shown in Figure 5; Figure 7 is a view showing the steiner in its fully extended state; and Figure 8 is a view of the drill during excavation work. FIG. 6 shows the tool and stainer partially retracted into the row. Explanation of symbols, 10...Borehole, 12...
Deflection unit, 15... Geological formation, 20... Wire line tool, 22... Steinger lower end, 25... Steinger, 27... Steinger upper end, 35... Drill pipe, 40... Connection cable, 44... First (outer) moving part, 45... Second (inner) moving part, 50... First coupling means, 55...
Second coupling means, 60...Locking means, 64, 65...
... Seal portion, 67 ... Hollow recess, 70 ... Fluid passage, 73 ... Steinger seal.

Claims (1)

[Scope of Claims] 1. In a method for performing wireline work such as drilling and/or perforation in a borehole extending through a geological formation: (a) A hollow pipe such as a drill row containing a hollow extending member in the borehole; (b) removably attaching a wireline tool to the bottom of the hollow pipe, the tool engaging the hollow extension member when attached to the bottom of the hollow pipe; is moved within the hollow pipe; (c) a two-stage moving body is moved, and when the hollow extending member is reached, the first stage moving body engages with the upper end of the extending member; After the stage motion body engages the extension member, a second stage motion body continues to be lowered by moving through the extension member to the tool; (d) attaching a wireline cable to the motion body; mounting, moving the moving body within the hollow pipe to pull the wire line cable through the hollow pipe and the hollow extension member to the tool, electrically and mechanically connecting the wire line and the tool. Wireline working method inside a borehole. 2. The wire line working method according to claim 1, characterized in that the moving body is lowered from the ground surface through the hollow pipe and the hollow extending member. 3. The wire line working method according to claim 2, wherein the moving body is lowered by applying fluid pressure into the hollow pipe. 4 When the hollow extending member is reached, the first stage moving body is engaged with the extending member, the pressure in the hollow pipe before and after the first stage moving body is balanced, and the first stage moves towards the above extending member. After engaging the member, the second stage moving body continues to be lowered through the hollow extending member to reach the tool. Wireline working method. 5 The hollow extending member is pulled out from the bottom of the hollow pipe by applying fluid pressure to the second stage moving body, and the extending member is pulled back into the pipe by pulling the cable. A wire line working method according to any one of claims 2 to 4. 6. Wireline working equipment used in combination with a pipe such as a drill pipe for excavating or perforating the strata surrounding a borehole, which includes: (a) a device for removably attaching a wireline tool to the lower end of said pipe; and (b) the above-mentioned equipment. a hollow extension member adapted to travel through the pipe and extend beyond the lower end of the pipe and engage the wireline tool; (c) a wireline cable is attached to the lower end of the pipe; a motion device coupled to the attached tool for moving within the pipe and extension and pulling a wireline cable through the pipe and extension; (d) a motion device coupled to the tool; a first stage moving body that descends and engages the upper end of the hollow extending member; and a second stage moving body that descends within the extending member after the first stage moving body engages the upper end of the extending member. 1. A wire line working device comprising a stepped moving body. 7. Claim No. 7, characterized in that the extending member below the first moving body is provided with a sealing means to movably seal the outside of the extending member with respect to the inside of the pipe. The wire line working device according to item 6. 8. The method according to claim 6 or 7, further comprising means associated with the movement device for extending the hollow extension member from the bottom of the pipe by applying fluid pressure through the pipe. Wireline work equipment as described. 9. Claim 6, wherein the first stage moving body includes means for equalizing the pressure between the inside of the hollow extending member and the inside of the pipe before and after the first stage moving body. The wire line working device according to any one of items 1 to 8. 10. The wire line working device according to claim 9, wherein the pressure equalization means is activated when the upper end of the hollow extending member and the first stage moving body engage with each other. 11 The pressure equalization means is configured to direct fluid to equalize fluid pressure above and below the first stage moving body when the first stage moving body is engaged with the extension member and activated. Claim 10, characterized in that it includes fluid passage forming means for penetrating the first stage moving body and forming a fluid passage communicating with the inside of the pipe.
Wireline work equipment as described in Section. 12. Claim 1, characterized in that a sealing means is provided on the extending member below the first stage moving body, and seals the outside of the extending member movably with respect to the inside of the pipe. The wire line working device according to any one of items 6 to 11. 13. said extension member in conjunction with said movement device, by pulling said hollow extension member out of the bottom of said pipe by means of fluid flow through said pipe, and retrieving a cable attached to said movement device; as claimed in any one of claims 6 to 12, comprising means constructed and arranged to draw the extension member back into the pipe to substantially avoid buckling of the extension member. wire line working equipment. 14. The hollow extending member comprises a hollow Steinger tube having an upper end and a lower end and having an outer diameter smaller than the inner diameter of the drill pipe, and the first stage moving body is received at the upper end of the Steinger tube. A first coupling means is provided and adapted to receive and couple to the lower end of the Steiner tube a second stage motion body in the Steinger tube and to form at least one electrical connection with the motion body. A second coupling means is provided at the lower end of the Steiner tube, and means are provided for attaching a wireline tool to the lower end of the second coupling means, when the second coupling means is not coupled to the second stage motion body. the second coupling means for cooperatively locking the second coupling means to an adjacent drill pipe section and releasing the second coupling means from the drill pipe when coupled to the second stage motion body; at least a portion of the coupling means is provided with removable locking means, and the first stage motion body has an effective outer diameter substantially equal to the inner diameter of the drill pipe and has a sealing portion that engages the first coupling means. a second stage moving body is at least partially co-moved and propelled by the first stage moving body, is movable independently of and below the first stage moving body, and is substantially equal to the inner diameter of the Steinger tube. a sealing portion having an effective outer diameter, and means for pulling a drilling cable through the drill pipe, the first stage motion body and the Steiner tube and connecting to the second coupling means; A sealing means for movably sealing the outside of the stainger is provided below the first coupling means, and fluid fed to the drill pipe propels both of the moving bodies to cause buckling of the stayer. By pulling out the stayer from the bottom of the drill pipe without causing the stayer to buckle and recovering the cable attached to the second stage moving body, the stayger can be pulled back into the drill pipe without causing buckling of the stayer. Claims 6 to 1 characterized by
The wire line working device according to any one of Item 3. 15 The sealing means for movably sealing the outside of the Steiner tube with respect to the inside of the drill pipe is located below the first coupling means, and the fluid fed into the drill pipe propels both of the moving bodies. The steinger is pulled out from the bottom of the drill pipe without buckling the steinger, and the cable attached to the second stage moving body is recovered to pull the steinger back into the drill pipe without buckling the steinger. 15. The wire line working device according to claim 14. 16. The wire line working device according to claim 14 or 15, wherein the first coupling means receives the first stage moving body without being coupled to the coupling means. 17. characterized in that the removable locking means for the second coupling means include means connectable to the lower end of the drill pipe for locking the second coupling means to the bottom end of the drill pipe. A wire line working device according to claim 14 or 15. 18 The above-mentioned means provided on the second-stage moving body for moving and propelling the second-stage moving body together with the first-stage moving body: (a) attached to the first-stage moving body; receives the moving body and pushes the second stage moving body downward in response to fluid flow within the drill pipe, and when the second stage moving body is pulled upwardly by a cable attached to the second stage moving body, the second stage moving body (b) said fluid extending through said first stage body when said second stage body is received in said receiving means of said first stage body; 16. The apparatus of claim 15, further comprising means for closing the passageway.